./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:18:25,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:18:25,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:18:25,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:18:25,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:18:25,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:18:25,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:18:25,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:18:25,616 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:18:25,617 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:18:25,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:18:25,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:18:25,618 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:18:25,618 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:18:25,618 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:18:25,619 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:18:25,619 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:18:25,619 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:18:25,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:18:25,620 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:18:25,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:18:25,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:18:25,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:18:25,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:18:25,621 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:18:25,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:18:25,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:18:25,622 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:18:25,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:18:25,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:18:25,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:18:25,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:18:25,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:18:25,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:18:25,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:18:25,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:18:25,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:18:25,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:18:25,625 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:18:25,625 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:18:25,625 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:18:25,626 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:18:25,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:18:25,627 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:18:25,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:18:25,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:18:25,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:18:25,839 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:18:25,839 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:18:25,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-03 20:18:25,992 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:18:25,992 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:18:25,993 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:18:27,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:18:27,250 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:18:27,251 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:18:27,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01726a933/4cde7841b6e3462d854815fb84bf1b28/FLAG8a6765327 [2024-06-03 20:18:27,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01726a933/4cde7841b6e3462d854815fb84bf1b28 [2024-06-03 20:18:27,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:18:27,279 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:18:27,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:18:27,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:18:27,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:18:27,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:25" (1/2) ... [2024-06-03 20:18:27,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b17dc89 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:27, skipping insertion in model container [2024-06-03 20:18:27,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:25" (1/2) ... [2024-06-03 20:18:27,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19484458 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:27, skipping insertion in model container [2024-06-03 20:18:27,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:18:27" (2/2) ... [2024-06-03 20:18:27,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b17dc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27, skipping insertion in model container [2024-06-03 20:18:27,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:18:27" (2/2) ... [2024-06-03 20:18:27,288 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:18:27,352 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:18:27,354 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:18:27,354 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:18:27,354 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:18:27,354 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:18:27,354 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-03 20:18:27,400 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:18:27,764 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:18:27,775 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:18:27,870 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:18:27,898 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:18:27,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27 WrapperNode [2024-06-03 20:18:27,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:18:27,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:18:27,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:18:27,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:18:27,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:27,932 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:27,967 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-03 20:18:27,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:18:27,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:18:27,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:18:27,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:18:27,980 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:27,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:27,983 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:27,998 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:18:27,999 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:27,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:28,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:28,007 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:28,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:28,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:28,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:18:28,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:18:28,020 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:18:28,020 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:18:28,021 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (1/1) ... [2024-06-03 20:18:28,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:18:28,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:18:28,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:18:28,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:18:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:18:28,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:18:28,111 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:18:28,112 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:18:28,112 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:18:28,112 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:18:28,112 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:18:28,112 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:18:28,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:18:28,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:18:28,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:18:28,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:18:28,117 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:18:28,206 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:18:28,208 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:18:28,480 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:18:28,480 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:18:28,665 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:18:28,665 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:18:28,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:18:28 BoogieIcfgContainer [2024-06-03 20:18:28,666 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:18:28,668 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:18:28,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:18:28,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:18:28,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:25" (1/4) ... [2024-06-03 20:18:28,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c23ec77 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:18:28, skipping insertion in model container [2024-06-03 20:18:28,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:18:27" (2/4) ... [2024-06-03 20:18:28,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c23ec77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:18:28, skipping insertion in model container [2024-06-03 20:18:28,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:27" (3/4) ... [2024-06-03 20:18:28,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c23ec77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:18:28, skipping insertion in model container [2024-06-03 20:18:28,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:18:28" (4/4) ... [2024-06-03 20:18:28,674 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-03 20:18:28,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:18:28,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:18:28,686 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:18:28,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:18:28,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:18:28,776 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:18:28,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:18:28,777 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 5. 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. [2024-06-03 20:18:28,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:18:28,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:18:28,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:18:28,794 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;@1f317422, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:18:28,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:18:28,796 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:18:28,796 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:18:28,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:18:28,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:28,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:18:28,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:28,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1617218559, now seen corresponding path program 1 times [2024-06-03 20:18:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:28,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460889430] [2024-06-03 20:18:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:29,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:29,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460889430] [2024-06-03 20:18:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460889430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:29,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:29,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:18:29,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497761228] [2024-06-03 20:18:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:29,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:18:29,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:18:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:18:29,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:29,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:29,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:29,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:29,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:30,119 INFO L124 PetriNetUnfolderBase]: 1059/1630 cut-off events. [2024-06-03 20:18:30,120 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-06-03 20:18:30,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 1630 events. 1059/1630 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7965 event pairs, 698 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 3281. Up to 1593 conditions per place. [2024-06-03 20:18:30,131 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:18:30,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-03 20:18:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:18:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:18:30,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-03 20:18:30,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:18:30,142 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-03 20:18:30,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-03 20:18:30,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:30,146 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:18:30,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:18:30,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:18:30,150 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:18:30,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:30,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:30,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:30,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:18:30,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:30,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash 631156512, now seen corresponding path program 1 times [2024-06-03 20:18:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:30,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563137843] [2024-06-03 20:18:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:30,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:30,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:30,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563137843] [2024-06-03 20:18:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563137843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:30,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:30,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:18:30,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258469859] [2024-06-03 20:18:30,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:18:30,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:18:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:18:30,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:30,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:30,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:30,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:30,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:30,865 INFO L124 PetriNetUnfolderBase]: 1053/1621 cut-off events. [2024-06-03 20:18:30,866 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2024-06-03 20:18:30,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3746 conditions, 1621 events. 1053/1621 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7908 event pairs, 618 based on Foata normal form. 3/1621 useless extension candidates. Maximal degree in co-relation 3731. Up to 1569 conditions per place. [2024-06-03 20:18:30,874 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 20:18:30,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-03 20:18:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:18:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:18:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-03 20:18:30,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:18:30,876 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 94 transitions. [2024-06-03 20:18:30,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-03 20:18:30,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:18:30,877 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 20:18:30,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 20:18:30,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 20:18:30,878 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 20:18:30,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:30,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:30,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:30,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:18:30,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:30,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1104764257, now seen corresponding path program 1 times [2024-06-03 20:18:30,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:30,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272635144] [2024-06-03 20:18:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:31,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272635144] [2024-06-03 20:18:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272635144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:31,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561181583] [2024-06-03 20:18:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:31,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:31,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:31,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:31,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:31,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:31,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:31,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:31,889 INFO L124 PetriNetUnfolderBase]: 1342/2033 cut-off events. [2024-06-03 20:18:31,890 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-03 20:18:31,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 2033 events. 1342/2033 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9599 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-03 20:18:31,899 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-03 20:18:31,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 274 flow [2024-06-03 20:18:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:18:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:18:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 20:18:31,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-03 20:18:31,901 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 92 transitions. [2024-06-03 20:18:31,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 274 flow [2024-06-03 20:18:31,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 260 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:31,903 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-03 20:18:31,903 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-03 20:18:31,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-03 20:18:31,904 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-03 20:18:31,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:31,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:31,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:31,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:18:31,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:31,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash -867182242, now seen corresponding path program 1 times [2024-06-03 20:18:31,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:31,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495395684] [2024-06-03 20:18:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:32,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495395684] [2024-06-03 20:18:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495395684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:32,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:32,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:32,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707316458] [2024-06-03 20:18:32,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:32,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:32,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:32,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:32,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:32,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:32,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:32,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:32,791 INFO L124 PetriNetUnfolderBase]: 1333/2018 cut-off events. [2024-06-03 20:18:32,791 INFO L125 PetriNetUnfolderBase]: For 1936/1936 co-relation queries the response was YES. [2024-06-03 20:18:32,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5647 conditions, 2018 events. 1333/2018 cut-off events. For 1936/1936 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9644 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-03 20:18:32,800 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-03 20:18:32,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 384 flow [2024-06-03 20:18:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:32,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 20:18:32,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-03 20:18:32,802 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 127 transitions. [2024-06-03 20:18:32,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 384 flow [2024-06-03 20:18:32,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 366 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:32,815 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-03 20:18:32,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 20:18:32,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:18:32,816 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-03 20:18:32,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:32,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:32,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:32,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:18:32,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:32,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash 73616824, now seen corresponding path program 1 times [2024-06-03 20:18:32,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:32,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595452088] [2024-06-03 20:18:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:33,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595452088] [2024-06-03 20:18:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595452088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:33,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:33,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836516262] [2024-06-03 20:18:33,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:33,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:33,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:33,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:33,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:33,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:33,868 INFO L124 PetriNetUnfolderBase]: 1323/2004 cut-off events. [2024-06-03 20:18:33,869 INFO L125 PetriNetUnfolderBase]: For 3162/3162 co-relation queries the response was YES. [2024-06-03 20:18:33,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6115 conditions, 2004 events. 1323/2004 cut-off events. For 3162/3162 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9520 event pairs, 556 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 6095. Up to 1948 conditions per place. [2024-06-03 20:18:33,879 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-03 20:18:33,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 385 flow [2024-06-03 20:18:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:18:33,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:18:33,881 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:18:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 385 flow [2024-06-03 20:18:33,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 356 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:33,884 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-03 20:18:33,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-03 20:18:33,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-03 20:18:33,885 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-03 20:18:33,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:33,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:33,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:18:33,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:33,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2019520076, now seen corresponding path program 1 times [2024-06-03 20:18:33,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:33,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934649482] [2024-06-03 20:18:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:33,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:34,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:34,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934649482] [2024-06-03 20:18:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934649482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:34,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:34,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026581948] [2024-06-03 20:18:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:34,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:34,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:34,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:34,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:34,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:34,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:34,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:34,995 INFO L124 PetriNetUnfolderBase]: 1334/2026 cut-off events. [2024-06-03 20:18:34,995 INFO L125 PetriNetUnfolderBase]: For 4463/4467 co-relation queries the response was YES. [2024-06-03 20:18:34,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6634 conditions, 2026 events. 1334/2026 cut-off events. For 4463/4467 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9742 event pairs, 557 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 6612. Up to 1947 conditions per place. [2024-06-03 20:18:35,005 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-03 20:18:35,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 482 flow [2024-06-03 20:18:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 20:18:35,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:18:35,007 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 6 states and 114 transitions. [2024-06-03 20:18:35,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 482 flow [2024-06-03 20:18:35,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:35,010 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 288 flow [2024-06-03 20:18:35,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-03 20:18:35,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-03 20:18:35,010 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 288 flow [2024-06-03 20:18:35,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:35,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:35,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:35,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:18:35,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:35,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash -782187626, now seen corresponding path program 2 times [2024-06-03 20:18:35,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:35,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067399502] [2024-06-03 20:18:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:35,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067399502] [2024-06-03 20:18:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067399502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:35,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:35,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:35,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231908725] [2024-06-03 20:18:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:35,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:35,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:35,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:35,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:35,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:35,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:36,259 INFO L124 PetriNetUnfolderBase]: 1329/2013 cut-off events. [2024-06-03 20:18:36,260 INFO L125 PetriNetUnfolderBase]: For 5982/5982 co-relation queries the response was YES. [2024-06-03 20:18:36,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7061 conditions, 2013 events. 1329/2013 cut-off events. For 5982/5982 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9690 event pairs, 560 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 7038. Up to 1942 conditions per place. [2024-06-03 20:18:36,279 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-03 20:18:36,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 456 flow [2024-06-03 20:18:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 20:18:36,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-03 20:18:36,281 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 288 flow. Second operand 6 states and 109 transitions. [2024-06-03 20:18:36,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 456 flow [2024-06-03 20:18:36,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:36,287 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 294 flow [2024-06-03 20:18:36,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=254, 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=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-03 20:18:36,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-03 20:18:36,289 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 294 flow [2024-06-03 20:18:36,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:36,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:36,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:36,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:18:36,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:36,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:36,290 INFO L85 PathProgramCache]: Analyzing trace with hash 594457391, now seen corresponding path program 1 times [2024-06-03 20:18:36,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:36,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653362674] [2024-06-03 20:18:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:36,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:36,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:36,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653362674] [2024-06-03 20:18:36,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653362674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:36,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:36,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104597190] [2024-06-03 20:18:36,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:36,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:36,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:37,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:37,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:37,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:37,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:37,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:37,535 INFO L124 PetriNetUnfolderBase]: 1408/2140 cut-off events. [2024-06-03 20:18:37,536 INFO L125 PetriNetUnfolderBase]: For 7633/7633 co-relation queries the response was YES. [2024-06-03 20:18:37,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7675 conditions, 2140 events. 1408/2140 cut-off events. For 7633/7633 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10320 event pairs, 515 based on Foata normal form. 4/2142 useless extension candidates. Maximal degree in co-relation 7650. Up to 1947 conditions per place. [2024-06-03 20:18:37,556 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 69 selfloop transitions, 36 changer transitions 0/110 dead transitions. [2024-06-03 20:18:37,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 791 flow [2024-06-03 20:18:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:18:37,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:18:37,559 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 294 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:18:37,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 791 flow [2024-06-03 20:18:37,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 713 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:37,568 INFO L231 Difference]: Finished difference. Result has 66 places, 76 transitions, 495 flow [2024-06-03 20:18:37,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=495, PETRI_PLACES=66, PETRI_TRANSITIONS=76} [2024-06-03 20:18:37,571 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-03 20:18:37,571 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 76 transitions, 495 flow [2024-06-03 20:18:37,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:37,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:37,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:18:37,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:37,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1139413649, now seen corresponding path program 2 times [2024-06-03 20:18:37,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:37,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811298072] [2024-06-03 20:18:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:37,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811298072] [2024-06-03 20:18:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811298072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:38,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955857765] [2024-06-03 20:18:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:38,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:38,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 76 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:38,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:38,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:38,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:38,856 INFO L124 PetriNetUnfolderBase]: 1444/2202 cut-off events. [2024-06-03 20:18:38,856 INFO L125 PetriNetUnfolderBase]: For 10053/10053 co-relation queries the response was YES. [2024-06-03 20:18:38,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 2202 events. 1444/2202 cut-off events. For 10053/10053 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10600 event pairs, 514 based on Foata normal form. 6/2206 useless extension candidates. Maximal degree in co-relation 8557. Up to 1979 conditions per place. [2024-06-03 20:18:38,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 42 changer transitions 0/110 dead transitions. [2024-06-03 20:18:38,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 885 flow [2024-06-03 20:18:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 20:18:38,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-03 20:18:38,871 INFO L175 Difference]: Start difference. First operand has 66 places, 76 transitions, 495 flow. Second operand 7 states and 135 transitions. [2024-06-03 20:18:38,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 885 flow [2024-06-03 20:18:38,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 859 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:38,878 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 630 flow [2024-06-03 20:18:38,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-06-03 20:18:38,879 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-03 20:18:38,879 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 630 flow [2024-06-03 20:18:38,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:38,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:38,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:38,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:18:38,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:38,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1522255093, now seen corresponding path program 3 times [2024-06-03 20:18:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:38,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917482850] [2024-06-03 20:18:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:38,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:39,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:39,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917482850] [2024-06-03 20:18:39,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917482850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:39,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:39,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014014675] [2024-06-03 20:18:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:39,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:39,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:39,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:39,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 630 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:39,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:39,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:39,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:40,191 INFO L124 PetriNetUnfolderBase]: 1480/2249 cut-off events. [2024-06-03 20:18:40,192 INFO L125 PetriNetUnfolderBase]: For 12327/12327 co-relation queries the response was YES. [2024-06-03 20:18:40,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9276 conditions, 2249 events. 1480/2249 cut-off events. For 12327/12327 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10872 event pairs, 510 based on Foata normal form. 6/2252 useless extension candidates. Maximal degree in co-relation 9246. Up to 2011 conditions per place. [2024-06-03 20:18:40,203 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 49 changer transitions 0/113 dead transitions. [2024-06-03 20:18:40,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 1036 flow [2024-06-03 20:18:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:18:40,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:18:40,204 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 630 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:18:40,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 1036 flow [2024-06-03 20:18:40,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 932 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:40,214 INFO L231 Difference]: Finished difference. Result has 73 places, 88 transitions, 713 flow [2024-06-03 20:18:40,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=73, PETRI_TRANSITIONS=88} [2024-06-03 20:18:40,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-03 20:18:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 88 transitions, 713 flow [2024-06-03 20:18:40,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:40,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:40,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:18:40,216 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:40,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 302940463, now seen corresponding path program 4 times [2024-06-03 20:18:40,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:40,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545367045] [2024-06-03 20:18:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:40,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545367045] [2024-06-03 20:18:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545367045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:40,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:40,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:40,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212902760] [2024-06-03 20:18:40,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:41,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:41,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 713 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:41,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:41,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:41,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:41,521 INFO L124 PetriNetUnfolderBase]: 1464/2229 cut-off events. [2024-06-03 20:18:41,521 INFO L125 PetriNetUnfolderBase]: For 12348/12348 co-relation queries the response was YES. [2024-06-03 20:18:41,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 2229 events. 1464/2229 cut-off events. For 12348/12348 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10752 event pairs, 513 based on Foata normal form. 6/2232 useless extension candidates. Maximal degree in co-relation 9060. Up to 1998 conditions per place. [2024-06-03 20:18:41,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 47 changer transitions 0/111 dead transitions. [2024-06-03 20:18:41,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 999 flow [2024-06-03 20:18:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:18:41,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:18:41,535 INFO L175 Difference]: Start difference. First operand has 73 places, 88 transitions, 713 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:18:41,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 999 flow [2024-06-03 20:18:41,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 866 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:41,545 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 685 flow [2024-06-03 20:18:41,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2024-06-03 20:18:41,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-03 20:18:41,545 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 685 flow [2024-06-03 20:18:41,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:41,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:41,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:41,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:18:41,546 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:41,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash 303217293, now seen corresponding path program 1 times [2024-06-03 20:18:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253016963] [2024-06-03 20:18:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:41,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:42,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:42,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253016963] [2024-06-03 20:18:42,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253016963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:42,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:42,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056520707] [2024-06-03 20:18:42,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:42,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:42,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:42,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:42,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:42,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:42,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:42,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:42,986 INFO L124 PetriNetUnfolderBase]: 1456/2220 cut-off events. [2024-06-03 20:18:42,986 INFO L125 PetriNetUnfolderBase]: For 13624/13624 co-relation queries the response was YES. [2024-06-03 20:18:42,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9103 conditions, 2220 events. 1456/2220 cut-off events. For 13624/13624 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10673 event pairs, 519 based on Foata normal form. 4/2223 useless extension candidates. Maximal degree in co-relation 9072. Up to 2123 conditions per place. [2024-06-03 20:18:43,001 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-03 20:18:43,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 983 flow [2024-06-03 20:18:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:18:43,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 20:18:43,002 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 685 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:18:43,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 983 flow [2024-06-03 20:18:43,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 849 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:43,014 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 612 flow [2024-06-03 20:18:43,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=612, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2024-06-03 20:18:43,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-03 20:18:43,015 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 612 flow [2024-06-03 20:18:43,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:43,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:43,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:43,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:18:43,017 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:43,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:43,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1694568561, now seen corresponding path program 1 times [2024-06-03 20:18:43,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105209240] [2024-06-03 20:18:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:43,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:43,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105209240] [2024-06-03 20:18:43,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105209240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:43,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:43,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487053703] [2024-06-03 20:18:43,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:43,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:43,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:43,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:43,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 612 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:43,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:43,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:43,937 INFO L124 PetriNetUnfolderBase]: 1323/2087 cut-off events. [2024-06-03 20:18:43,937 INFO L125 PetriNetUnfolderBase]: For 14238/14238 co-relation queries the response was YES. [2024-06-03 20:18:43,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8591 conditions, 2087 events. 1323/2087 cut-off events. For 14238/14238 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10168 event pairs, 556 based on Foata normal form. 1/2087 useless extension candidates. Maximal degree in co-relation 8559. Up to 1959 conditions per place. [2024-06-03 20:18:43,949 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 73 selfloop transitions, 8 changer transitions 0/101 dead transitions. [2024-06-03 20:18:43,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 101 transitions, 818 flow [2024-06-03 20:18:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:18:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:18:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-03 20:18:43,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 20:18:43,950 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 612 flow. Second operand 5 states and 91 transitions. [2024-06-03 20:18:43,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 101 transitions, 818 flow [2024-06-03 20:18:43,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 775 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:43,961 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 617 flow [2024-06-03 20:18:43,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-03 20:18:43,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-03 20:18:43,962 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 617 flow [2024-06-03 20:18:43,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:43,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:43,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:43,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:18:43,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:43,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1845312873, now seen corresponding path program 1 times [2024-06-03 20:18:43,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:43,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363815437] [2024-06-03 20:18:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:44,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363815437] [2024-06-03 20:18:44,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363815437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:44,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:44,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316994147] [2024-06-03 20:18:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:44,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:44,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:44,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:44,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:44,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:44,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:45,157 INFO L124 PetriNetUnfolderBase]: 1464/2239 cut-off events. [2024-06-03 20:18:45,157 INFO L125 PetriNetUnfolderBase]: For 16613/16613 co-relation queries the response was YES. [2024-06-03 20:18:45,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9621 conditions, 2239 events. 1464/2239 cut-off events. For 16613/16613 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10743 event pairs, 529 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 9588. Up to 2130 conditions per place. [2024-06-03 20:18:45,168 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-06-03 20:18:45,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 957 flow [2024-06-03 20:18:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:18:45,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-03 20:18:45,170 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 617 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:18:45,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 957 flow [2024-06-03 20:18:45,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 931 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:45,180 INFO L231 Difference]: Finished difference. Result has 80 places, 96 transitions, 667 flow [2024-06-03 20:18:45,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=667, PETRI_PLACES=80, PETRI_TRANSITIONS=96} [2024-06-03 20:18:45,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-03 20:18:45,181 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 96 transitions, 667 flow [2024-06-03 20:18:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:45,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:45,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:45,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:18:45,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:45,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash 962078651, now seen corresponding path program 2 times [2024-06-03 20:18:45,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:45,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077696883] [2024-06-03 20:18:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:45,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:45,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077696883] [2024-06-03 20:18:45,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077696883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:45,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:45,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678970770] [2024-06-03 20:18:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:45,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:45,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:45,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 96 transitions, 667 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:45,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:45,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:45,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:46,356 INFO L124 PetriNetUnfolderBase]: 1475/2259 cut-off events. [2024-06-03 20:18:46,356 INFO L125 PetriNetUnfolderBase]: For 19490/19492 co-relation queries the response was YES. [2024-06-03 20:18:46,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10208 conditions, 2259 events. 1475/2259 cut-off events. For 19490/19492 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10959 event pairs, 523 based on Foata normal form. 4/2262 useless extension candidates. Maximal degree in co-relation 10174. Up to 2075 conditions per place. [2024-06-03 20:18:46,368 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-03 20:18:46,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 1115 flow [2024-06-03 20:18:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 20:18:46,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-03 20:18:46,370 INFO L175 Difference]: Start difference. First operand has 80 places, 96 transitions, 667 flow. Second operand 7 states and 132 transitions. [2024-06-03 20:18:46,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 1115 flow [2024-06-03 20:18:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 1063 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:46,385 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 767 flow [2024-06-03 20:18:46,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=767, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-03 20:18:46,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-03 20:18:46,387 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 767 flow [2024-06-03 20:18:46,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:46,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:46,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:18:46,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:46,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash 630515387, now seen corresponding path program 3 times [2024-06-03 20:18:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:46,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881021517] [2024-06-03 20:18:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:47,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:47,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881021517] [2024-06-03 20:18:47,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881021517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:47,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:47,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:47,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107146169] [2024-06-03 20:18:47,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:47,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:47,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:47,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:47,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:47,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 767 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:47,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:47,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:47,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:47,535 INFO L124 PetriNetUnfolderBase]: 1470/2243 cut-off events. [2024-06-03 20:18:47,535 INFO L125 PetriNetUnfolderBase]: For 22776/22776 co-relation queries the response was YES. [2024-06-03 20:18:47,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10625 conditions, 2243 events. 1470/2243 cut-off events. For 22776/22776 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10868 event pairs, 531 based on Foata normal form. 2/2241 useless extension candidates. Maximal degree in co-relation 10590. Up to 2070 conditions per place. [2024-06-03 20:18:47,548 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2024-06-03 20:18:47,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1075 flow [2024-06-03 20:18:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:18:47,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 20:18:47,550 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 767 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:18:47,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1075 flow [2024-06-03 20:18:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1007 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:47,568 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 774 flow [2024-06-03 20:18:47,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=774, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-03 20:18:47,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-03 20:18:47,569 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 774 flow [2024-06-03 20:18:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:47,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:47,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:18:47,570 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:47,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 992019018, now seen corresponding path program 1 times [2024-06-03 20:18:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775139032] [2024-06-03 20:18:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:47,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:48,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775139032] [2024-06-03 20:18:48,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775139032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:48,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:48,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932147676] [2024-06-03 20:18:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:48,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:48,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:48,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:48,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:48,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:48,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:48,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:48,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:48,580 INFO L124 PetriNetUnfolderBase]: 1342/2124 cut-off events. [2024-06-03 20:18:48,580 INFO L125 PetriNetUnfolderBase]: For 24687/24692 co-relation queries the response was YES. [2024-06-03 20:18:48,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 2124 events. 1342/2124 cut-off events. For 24687/24692 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10479 event pairs, 527 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 10183. Up to 1934 conditions per place. [2024-06-03 20:18:48,591 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-03 20:18:48,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 121 transitions, 1096 flow [2024-06-03 20:18:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 20:18:48,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:18:48,594 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 774 flow. Second operand 6 states and 110 transitions. [2024-06-03 20:18:48,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 121 transitions, 1096 flow [2024-06-03 20:18:48,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1010 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:48,615 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 815 flow [2024-06-03 20:18:48,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=815, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-03 20:18:48,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 20:18:48,616 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 815 flow [2024-06-03 20:18:48,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:48,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:48,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:48,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:18:48,617 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:48,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:48,618 INFO L85 PathProgramCache]: Analyzing trace with hash 621200880, now seen corresponding path program 1 times [2024-06-03 20:18:48,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:48,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093957869] [2024-06-03 20:18:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:48,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:49,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093957869] [2024-06-03 20:18:49,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093957869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:49,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:49,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:49,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795807463] [2024-06-03 20:18:49,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:49,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:49,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:49,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:49,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:49,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:49,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:49,903 INFO L124 PetriNetUnfolderBase]: 1585/2438 cut-off events. [2024-06-03 20:18:49,903 INFO L125 PetriNetUnfolderBase]: For 30405/30405 co-relation queries the response was YES. [2024-06-03 20:18:49,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 2438 events. 1585/2438 cut-off events. For 30405/30405 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12000 event pairs, 521 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 12301. Up to 2234 conditions per place. [2024-06-03 20:18:49,918 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 36 changer transitions 0/174 dead transitions. [2024-06-03 20:18:49,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1552 flow [2024-06-03 20:18:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:18:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:18:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-03 20:18:49,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-03 20:18:49,920 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 815 flow. Second operand 11 states and 200 transitions. [2024-06-03 20:18:49,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1552 flow [2024-06-03 20:18:49,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1511 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:49,940 INFO L231 Difference]: Finished difference. Result has 99 places, 130 transitions, 1062 flow [2024-06-03 20:18:49,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1062, PETRI_PLACES=99, PETRI_TRANSITIONS=130} [2024-06-03 20:18:49,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 20:18:49,941 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 130 transitions, 1062 flow [2024-06-03 20:18:49,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:49,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:49,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:49,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:18:49,942 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:49,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash -387941678, now seen corresponding path program 2 times [2024-06-03 20:18:49,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:49,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004813143] [2024-06-03 20:18:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:50,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:50,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004813143] [2024-06-03 20:18:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004813143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:50,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392567750] [2024-06-03 20:18:50,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:50,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:50,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 130 transitions, 1062 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:50,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:50,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:50,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:51,336 INFO L124 PetriNetUnfolderBase]: 1569/2414 cut-off events. [2024-06-03 20:18:51,336 INFO L125 PetriNetUnfolderBase]: For 34284/34284 co-relation queries the response was YES. [2024-06-03 20:18:51,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12823 conditions, 2414 events. 1569/2414 cut-off events. For 34284/34284 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11907 event pairs, 520 based on Foata normal form. 6/2419 useless extension candidates. Maximal degree in co-relation 12779. Up to 2221 conditions per place. [2024-06-03 20:18:51,352 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-03 20:18:51,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1491 flow [2024-06-03 20:18:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:18:51,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:18:51,354 INFO L175 Difference]: Start difference. First operand has 99 places, 130 transitions, 1062 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:18:51,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1491 flow [2024-06-03 20:18:51,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 160 transitions, 1382 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:51,373 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1038 flow [2024-06-03 20:18:51,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1038, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-03 20:18:51,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-03 20:18:51,374 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1038 flow [2024-06-03 20:18:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:51,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:51,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:51,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:18:51,377 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:51,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash 593026860, now seen corresponding path program 3 times [2024-06-03 20:18:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:51,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496128007] [2024-06-03 20:18:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:52,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496128007] [2024-06-03 20:18:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496128007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:52,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:52,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739617846] [2024-06-03 20:18:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:52,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:52,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:52,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:52,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:52,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:52,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:52,804 INFO L124 PetriNetUnfolderBase]: 1623/2495 cut-off events. [2024-06-03 20:18:52,804 INFO L125 PetriNetUnfolderBase]: For 37898/37898 co-relation queries the response was YES. [2024-06-03 20:18:52,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13494 conditions, 2495 events. 1623/2495 cut-off events. For 37898/37898 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12412 event pairs, 468 based on Foata normal form. 4/2497 useless extension candidates. Maximal degree in co-relation 13448. Up to 1989 conditions per place. [2024-06-03 20:18:52,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 74 changer transitions 0/175 dead transitions. [2024-06-03 20:18:52,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 175 transitions, 1777 flow [2024-06-03 20:18:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:18:52,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:18:52,823 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1038 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:18:52,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 175 transitions, 1777 flow [2024-06-03 20:18:52,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 175 transitions, 1688 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:52,848 INFO L231 Difference]: Finished difference. Result has 104 places, 139 transitions, 1253 flow [2024-06-03 20:18:52,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1253, PETRI_PLACES=104, PETRI_TRANSITIONS=139} [2024-06-03 20:18:52,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-03 20:18:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 139 transitions, 1253 flow [2024-06-03 20:18:52,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:52,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:52,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:52,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:18:52,850 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:52,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:52,850 INFO L85 PathProgramCache]: Analyzing trace with hash -240332078, now seen corresponding path program 4 times [2024-06-03 20:18:52,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:52,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118898766] [2024-06-03 20:18:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:52,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118898766] [2024-06-03 20:18:53,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118898766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:53,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:53,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796782479] [2024-06-03 20:18:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:53,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:53,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 139 transitions, 1253 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:53,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:53,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:53,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:54,234 INFO L124 PetriNetUnfolderBase]: 1613/2490 cut-off events. [2024-06-03 20:18:54,234 INFO L125 PetriNetUnfolderBase]: For 38972/38972 co-relation queries the response was YES. [2024-06-03 20:18:54,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13750 conditions, 2490 events. 1613/2490 cut-off events. For 38972/38972 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12438 event pairs, 471 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 13704. Up to 1981 conditions per place. [2024-06-03 20:18:54,253 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 73 changer transitions 0/172 dead transitions. [2024-06-03 20:18:54,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 172 transitions, 1773 flow [2024-06-03 20:18:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:18:54,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:18:54,255 INFO L175 Difference]: Start difference. First operand has 104 places, 139 transitions, 1253 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:18:54,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 172 transitions, 1773 flow [2024-06-03 20:18:54,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 172 transitions, 1671 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:54,323 INFO L231 Difference]: Finished difference. Result has 109 places, 139 transitions, 1305 flow [2024-06-03 20:18:54,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1305, PETRI_PLACES=109, PETRI_TRANSITIONS=139} [2024-06-03 20:18:54,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-03 20:18:54,324 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 139 transitions, 1305 flow [2024-06-03 20:18:54,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:54,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:54,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:54,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:18:54,325 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:54,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:54,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1319303268, now seen corresponding path program 1 times [2024-06-03 20:18:54,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:54,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509400420] [2024-06-03 20:18:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:54,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:55,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509400420] [2024-06-03 20:18:55,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509400420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:55,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:55,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:55,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138065282] [2024-06-03 20:18:55,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:55,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:55,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:55,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:55,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 139 transitions, 1305 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:55,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:55,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:55,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:55,949 INFO L124 PetriNetUnfolderBase]: 1630/2515 cut-off events. [2024-06-03 20:18:55,949 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-03 20:18:55,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13976 conditions, 2515 events. 1630/2515 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12536 event pairs, 485 based on Foata normal form. 4/2517 useless extension candidates. Maximal degree in co-relation 13928. Up to 2216 conditions per place. [2024-06-03 20:18:55,966 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 50 changer transitions 0/172 dead transitions. [2024-06-03 20:18:55,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 172 transitions, 1787 flow [2024-06-03 20:18:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 20:18:55,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 20:18:55,968 INFO L175 Difference]: Start difference. First operand has 109 places, 139 transitions, 1305 flow. Second operand 8 states and 149 transitions. [2024-06-03 20:18:55,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 172 transitions, 1787 flow [2024-06-03 20:18:55,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 172 transitions, 1609 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:55,999 INFO L231 Difference]: Finished difference. Result has 110 places, 141 transitions, 1270 flow [2024-06-03 20:18:55,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1270, PETRI_PLACES=110, PETRI_TRANSITIONS=141} [2024-06-03 20:18:56,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 20:18:56,000 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 141 transitions, 1270 flow [2024-06-03 20:18:56,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:56,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:18:56,000 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:56,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 675424656, now seen corresponding path program 1 times [2024-06-03 20:18:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:56,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753939378] [2024-06-03 20:18:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:56,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:56,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753939378] [2024-06-03 20:18:56,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753939378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:56,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:56,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:56,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727679003] [2024-06-03 20:18:56,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:56,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:56,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:56,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:56,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:56,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:56,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 141 transitions, 1270 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:56,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:56,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:56,994 INFO L124 PetriNetUnfolderBase]: 1499/2388 cut-off events. [2024-06-03 20:18:56,994 INFO L125 PetriNetUnfolderBase]: For 43635/43640 co-relation queries the response was YES. [2024-06-03 20:18:57,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13434 conditions, 2388 events. 1499/2388 cut-off events. For 43635/43640 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12242 event pairs, 511 based on Foata normal form. 2/2381 useless extension candidates. Maximal degree in co-relation 13385. Up to 2156 conditions per place. [2024-06-03 20:18:57,010 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 120 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2024-06-03 20:18:57,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 159 transitions, 1634 flow [2024-06-03 20:18:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-03 20:18:57,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:18:57,011 INFO L175 Difference]: Start difference. First operand has 110 places, 141 transitions, 1270 flow. Second operand 6 states and 111 transitions. [2024-06-03 20:18:57,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 159 transitions, 1634 flow [2024-06-03 20:18:57,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1513 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:57,048 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1230 flow [2024-06-03 20:18:57,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1230, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-06-03 20:18:57,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 20:18:57,049 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1230 flow [2024-06-03 20:18:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:57,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:57,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:57,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:18:57,049 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:57,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1439467782, now seen corresponding path program 5 times [2024-06-03 20:18:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:57,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429958839] [2024-06-03 20:18:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:57,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429958839] [2024-06-03 20:18:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429958839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:57,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479821201] [2024-06-03 20:18:57,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:57,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:57,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:57,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1230 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:57,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:57,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:57,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:58,398 INFO L124 PetriNetUnfolderBase]: 1662/2565 cut-off events. [2024-06-03 20:18:58,399 INFO L125 PetriNetUnfolderBase]: For 48349/48349 co-relation queries the response was YES. [2024-06-03 20:18:58,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14427 conditions, 2565 events. 1662/2565 cut-off events. For 48349/48349 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12926 event pairs, 461 based on Foata normal form. 4/2564 useless extension candidates. Maximal degree in co-relation 14377. Up to 2041 conditions per place. [2024-06-03 20:18:58,414 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 95 selfloop transitions, 78 changer transitions 0/178 dead transitions. [2024-06-03 20:18:58,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 178 transitions, 1821 flow [2024-06-03 20:18:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:18:58,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:18:58,416 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1230 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:18:58,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 178 transitions, 1821 flow [2024-06-03 20:18:58,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 178 transitions, 1778 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:58,455 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1402 flow [2024-06-03 20:18:58,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1402, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-03 20:18:58,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-03 20:18:58,456 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1402 flow [2024-06-03 20:18:58,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:58,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:58,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:18:58,456 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:58,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:58,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1405558872, now seen corresponding path program 6 times [2024-06-03 20:18:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252012133] [2024-06-03 20:18:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:59,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:59,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252012133] [2024-06-03 20:18:59,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252012133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:59,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:59,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:59,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577901929] [2024-06-03 20:18:59,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:59,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:59,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:59,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:59,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:59,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:18:59,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1402 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:59,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:18:59,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:59,863 INFO L124 PetriNetUnfolderBase]: 1684/2601 cut-off events. [2024-06-03 20:18:59,864 INFO L125 PetriNetUnfolderBase]: For 53555/53555 co-relation queries the response was YES. [2024-06-03 20:18:59,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15139 conditions, 2601 events. 1684/2601 cut-off events. For 53555/53555 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13111 event pairs, 468 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 15088. Up to 2060 conditions per place. [2024-06-03 20:18:59,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 101 selfloop transitions, 76 changer transitions 0/182 dead transitions. [2024-06-03 20:18:59,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 182 transitions, 2016 flow [2024-06-03 20:18:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:18:59,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 20:18:59,884 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1402 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:18:59,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 182 transitions, 2016 flow [2024-06-03 20:18:59,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 182 transitions, 1847 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:59,926 INFO L231 Difference]: Finished difference. Result has 117 places, 150 transitions, 1450 flow [2024-06-03 20:18:59,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1450, PETRI_PLACES=117, PETRI_TRANSITIONS=150} [2024-06-03 20:18:59,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 20:18:59,927 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 150 transitions, 1450 flow [2024-06-03 20:18:59,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:59,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:59,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:18:59,928 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:59,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -932179472, now seen corresponding path program 7 times [2024-06-03 20:18:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:59,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431783760] [2024-06-03 20:18:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:59,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:00,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:00,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431783760] [2024-06-03 20:19:00,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431783760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:00,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:00,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:00,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174196914] [2024-06-03 20:19:00,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:00,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:00,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:00,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:00,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 150 transitions, 1450 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:00,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:00,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:00,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:01,272 INFO L124 PetriNetUnfolderBase]: 1674/2589 cut-off events. [2024-06-03 20:19:01,272 INFO L125 PetriNetUnfolderBase]: For 56286/56286 co-relation queries the response was YES. [2024-06-03 20:19:01,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15032 conditions, 2589 events. 1674/2589 cut-off events. For 56286/56286 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13058 event pairs, 472 based on Foata normal form. 4/2588 useless extension candidates. Maximal degree in co-relation 14980. Up to 2052 conditions per place. [2024-06-03 20:19:01,290 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 79 changer transitions 0/178 dead transitions. [2024-06-03 20:19:01,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 178 transitions, 1900 flow [2024-06-03 20:19:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:19:01,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:19:01,292 INFO L175 Difference]: Start difference. First operand has 117 places, 150 transitions, 1450 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:19:01,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 178 transitions, 1900 flow [2024-06-03 20:19:01,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 178 transitions, 1606 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 20:19:01,346 INFO L231 Difference]: Finished difference. Result has 117 places, 150 transitions, 1322 flow [2024-06-03 20:19:01,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=117, PETRI_TRANSITIONS=150} [2024-06-03 20:19:01,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 20:19:01,347 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 150 transitions, 1322 flow [2024-06-03 20:19:01,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:01,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:01,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:01,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:19:01,347 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:01,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1662326788, now seen corresponding path program 2 times [2024-06-03 20:19:01,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:01,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357049461] [2024-06-03 20:19:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:01,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:02,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:02,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357049461] [2024-06-03 20:19:02,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357049461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:02,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:02,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:02,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410758675] [2024-06-03 20:19:02,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:02,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:02,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:02,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:02,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 150 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:02,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:02,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:02,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:03,129 INFO L124 PetriNetUnfolderBase]: 1691/2625 cut-off events. [2024-06-03 20:19:03,129 INFO L125 PetriNetUnfolderBase]: For 59036/59036 co-relation queries the response was YES. [2024-06-03 20:19:03,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15089 conditions, 2625 events. 1691/2625 cut-off events. For 59036/59036 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13345 event pairs, 479 based on Foata normal form. 4/2626 useless extension candidates. Maximal degree in co-relation 15037. Up to 2312 conditions per place. [2024-06-03 20:19:03,148 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 124 selfloop transitions, 51 changer transitions 0/180 dead transitions. [2024-06-03 20:19:03,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 180 transitions, 1814 flow [2024-06-03 20:19:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:19:03,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:19:03,150 INFO L175 Difference]: Start difference. First operand has 117 places, 150 transitions, 1322 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:19:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 180 transitions, 1814 flow [2024-06-03 20:19:03,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1645 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:03,198 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1301 flow [2024-06-03 20:19:03,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1301, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-03 20:19:03,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-03 20:19:03,199 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1301 flow [2024-06-03 20:19:03,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:03,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:03,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:19:03,200 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:03,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -924545536, now seen corresponding path program 3 times [2024-06-03 20:19:03,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:03,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430793428] [2024-06-03 20:19:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:03,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:04,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:04,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430793428] [2024-06-03 20:19:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430793428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:04,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076328880] [2024-06-03 20:19:04,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:04,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:04,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:04,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1301 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:04,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:04,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:04,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:04,775 INFO L124 PetriNetUnfolderBase]: 1708/2652 cut-off events. [2024-06-03 20:19:04,775 INFO L125 PetriNetUnfolderBase]: For 63973/63973 co-relation queries the response was YES. [2024-06-03 20:19:04,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15446 conditions, 2652 events. 1708/2652 cut-off events. For 63973/63973 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13512 event pairs, 452 based on Foata normal form. 4/2653 useless extension candidates. Maximal degree in co-relation 15393. Up to 2245 conditions per place. [2024-06-03 20:19:04,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 58 changer transitions 0/186 dead transitions. [2024-06-03 20:19:04,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 186 transitions, 1947 flow [2024-06-03 20:19:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:19:04,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:19:04,793 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1301 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:19:04,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 186 transitions, 1947 flow [2024-06-03 20:19:04,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 186 transitions, 1819 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:04,832 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1376 flow [2024-06-03 20:19:04,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1376, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-03 20:19:04,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 20:19:04,837 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1376 flow [2024-06-03 20:19:04,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:04,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:04,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:04,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:19:04,838 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:04,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:04,838 INFO L85 PathProgramCache]: Analyzing trace with hash -931964146, now seen corresponding path program 4 times [2024-06-03 20:19:04,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:04,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431342257] [2024-06-03 20:19:04,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:04,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:05,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:05,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431342257] [2024-06-03 20:19:05,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431342257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:05,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:05,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080356732] [2024-06-03 20:19:05,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:05,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:05,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:05,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:05,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1376 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:05,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:05,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:05,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:06,466 INFO L124 PetriNetUnfolderBase]: 1700/2642 cut-off events. [2024-06-03 20:19:06,466 INFO L125 PetriNetUnfolderBase]: For 67754/67754 co-relation queries the response was YES. [2024-06-03 20:19:06,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15582 conditions, 2642 events. 1700/2642 cut-off events. For 67754/67754 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13382 event pairs, 483 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 15528. Up to 2327 conditions per place. [2024-06-03 20:19:06,488 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 49 changer transitions 0/184 dead transitions. [2024-06-03 20:19:06,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 184 transitions, 1836 flow [2024-06-03 20:19:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:19:06,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:19:06,490 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1376 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:19:06,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 184 transitions, 1836 flow [2024-06-03 20:19:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 184 transitions, 1722 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:06,563 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1368 flow [2024-06-03 20:19:06,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1368, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2024-06-03 20:19:06,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 20:19:06,565 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1368 flow [2024-06-03 20:19:06,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:06,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:06,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:06,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:19:06,565 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:06,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1851441276, now seen corresponding path program 2 times [2024-06-03 20:19:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:06,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034700138] [2024-06-03 20:19:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:06,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:07,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:07,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034700138] [2024-06-03 20:19:07,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034700138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:07,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:07,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:19:07,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586549120] [2024-06-03 20:19:07,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:19:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:19:07,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:19:07,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:07,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1368 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:07,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:07,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:07,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:07,663 INFO L124 PetriNetUnfolderBase]: 1540/2456 cut-off events. [2024-06-03 20:19:07,664 INFO L125 PetriNetUnfolderBase]: For 68729/68743 co-relation queries the response was YES. [2024-06-03 20:19:07,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 2456 events. 1540/2456 cut-off events. For 68729/68743 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12639 event pairs, 515 based on Foata normal form. 4/2436 useless extension candidates. Maximal degree in co-relation 14472. Up to 2192 conditions per place. [2024-06-03 20:19:07,679 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 26 changer transitions 0/166 dead transitions. [2024-06-03 20:19:07,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 166 transitions, 1690 flow [2024-06-03 20:19:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 20:19:07,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-03 20:19:07,681 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1368 flow. Second operand 6 states and 109 transitions. [2024-06-03 20:19:07,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 166 transitions, 1690 flow [2024-06-03 20:19:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 1560 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:07,731 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1298 flow [2024-06-03 20:19:07,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-03 20:19:07,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-03 20:19:07,732 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1298 flow [2024-06-03 20:19:07,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:07,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:07,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:07,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:19:07,733 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:07,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash 682097840, now seen corresponding path program 1 times [2024-06-03 20:19:07,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:07,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660867444] [2024-06-03 20:19:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:07,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660867444] [2024-06-03 20:19:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660867444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:08,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:08,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:19:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356999583] [2024-06-03 20:19:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:08,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:19:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:19:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:19:08,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:08,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1298 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:08,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:08,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:08,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:08,699 INFO L124 PetriNetUnfolderBase]: 1689/2631 cut-off events. [2024-06-03 20:19:08,699 INFO L125 PetriNetUnfolderBase]: For 72420/72420 co-relation queries the response was YES. [2024-06-03 20:19:08,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15574 conditions, 2631 events. 1689/2631 cut-off events. For 72420/72420 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13396 event pairs, 542 based on Foata normal form. 1/2631 useless extension candidates. Maximal degree in co-relation 15517. Up to 2503 conditions per place. [2024-06-03 20:19:08,717 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 155 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2024-06-03 20:19:08,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1706 flow [2024-06-03 20:19:08,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 20:19:08,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 20:19:08,718 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1298 flow. Second operand 6 states and 103 transitions. [2024-06-03 20:19:08,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1706 flow [2024-06-03 20:19:08,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 171 transitions, 1635 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:08,767 INFO L231 Difference]: Finished difference. Result has 124 places, 159 transitions, 1291 flow [2024-06-03 20:19:08,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1291, PETRI_PLACES=124, PETRI_TRANSITIONS=159} [2024-06-03 20:19:08,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 20:19:08,768 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 159 transitions, 1291 flow [2024-06-03 20:19:08,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:08,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:08,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:08,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:19:08,769 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:08,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1851448220, now seen corresponding path program 2 times [2024-06-03 20:19:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:08,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259236343] [2024-06-03 20:19:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:08,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:09,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:09,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259236343] [2024-06-03 20:19:09,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259236343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:09,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:09,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:19:09,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156430072] [2024-06-03 20:19:09,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:09,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:19:09,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:19:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:19:09,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:09,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 159 transitions, 1291 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:09,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:09,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:09,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:09,774 INFO L124 PetriNetUnfolderBase]: 1686/2628 cut-off events. [2024-06-03 20:19:09,775 INFO L125 PetriNetUnfolderBase]: For 76167/76169 co-relation queries the response was YES. [2024-06-03 20:19:09,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15842 conditions, 2628 events. 1686/2628 cut-off events. For 76167/76169 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13366 event pairs, 546 based on Foata normal form. 3/2630 useless extension candidates. Maximal degree in co-relation 15784. Up to 2493 conditions per place. [2024-06-03 20:19:09,792 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 150 selfloop transitions, 16 changer transitions 0/171 dead transitions. [2024-06-03 20:19:09,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 171 transitions, 1691 flow [2024-06-03 20:19:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-03 20:19:09,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:19:09,794 INFO L175 Difference]: Start difference. First operand has 124 places, 159 transitions, 1291 flow. Second operand 6 states and 102 transitions. [2024-06-03 20:19:09,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 171 transitions, 1691 flow [2024-06-03 20:19:09,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1649 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:09,848 INFO L231 Difference]: Finished difference. Result has 126 places, 162 transitions, 1329 flow [2024-06-03 20:19:09,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1329, PETRI_PLACES=126, PETRI_TRANSITIONS=162} [2024-06-03 20:19:09,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-03 20:19:09,849 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 162 transitions, 1329 flow [2024-06-03 20:19:09,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:09,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:09,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:09,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:19:09,849 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:09,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash 687819696, now seen corresponding path program 1 times [2024-06-03 20:19:09,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:09,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840651207] [2024-06-03 20:19:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:09,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840651207] [2024-06-03 20:19:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840651207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007911831] [2024-06-03 20:19:10,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:10,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:10,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 162 transitions, 1329 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:10,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:10,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:10,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:11,081 INFO L124 PetriNetUnfolderBase]: 1560/2484 cut-off events. [2024-06-03 20:19:11,081 INFO L125 PetriNetUnfolderBase]: For 79375/79389 co-relation queries the response was YES. [2024-06-03 20:19:11,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15344 conditions, 2484 events. 1560/2484 cut-off events. For 79375/79389 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12765 event pairs, 512 based on Foata normal form. 3/2463 useless extension candidates. Maximal degree in co-relation 15285. Up to 2189 conditions per place. [2024-06-03 20:19:11,099 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 122 selfloop transitions, 31 changer transitions 0/177 dead transitions. [2024-06-03 20:19:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 177 transitions, 1719 flow [2024-06-03 20:19:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:19:11,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 20:19:11,101 INFO L175 Difference]: Start difference. First operand has 126 places, 162 transitions, 1329 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:19:11,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 177 transitions, 1719 flow [2024-06-03 20:19:11,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 177 transitions, 1661 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:11,166 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1392 flow [2024-06-03 20:19:11,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1392, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-03 20:19:11,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-03 20:19:11,167 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1392 flow [2024-06-03 20:19:11,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:11,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:11,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:11,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:19:11,168 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:11,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1980946566, now seen corresponding path program 1 times [2024-06-03 20:19:11,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:11,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502801338] [2024-06-03 20:19:11,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502801338] [2024-06-03 20:19:11,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502801338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:11,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:11,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090090571] [2024-06-03 20:19:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:12,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:12,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1392 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:12,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:12,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:12,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:12,632 INFO L124 PetriNetUnfolderBase]: 1735/2706 cut-off events. [2024-06-03 20:19:12,632 INFO L125 PetriNetUnfolderBase]: For 87783/87783 co-relation queries the response was YES. [2024-06-03 20:19:12,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17334 conditions, 2706 events. 1735/2706 cut-off events. For 87783/87783 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13780 event pairs, 366 based on Foata normal form. 4/2709 useless extension candidates. Maximal degree in co-relation 17274. Up to 2430 conditions per place. [2024-06-03 20:19:12,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 31 changer transitions 0/207 dead transitions. [2024-06-03 20:19:12,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 207 transitions, 2133 flow [2024-06-03 20:19:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 20:19:12,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-03 20:19:12,692 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1392 flow. Second operand 9 states and 164 transitions. [2024-06-03 20:19:12,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 207 transitions, 2133 flow [2024-06-03 20:19:12,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2040 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:12,755 INFO L231 Difference]: Finished difference. Result has 133 places, 170 transitions, 1460 flow [2024-06-03 20:19:12,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1460, PETRI_PLACES=133, PETRI_TRANSITIONS=170} [2024-06-03 20:19:12,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-03 20:19:12,756 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 170 transitions, 1460 flow [2024-06-03 20:19:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:12,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:12,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:12,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:19:12,757 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:12,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:12,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1026827840, now seen corresponding path program 2 times [2024-06-03 20:19:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839989774] [2024-06-03 20:19:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:13,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:13,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839989774] [2024-06-03 20:19:13,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839989774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:13,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:13,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873309663] [2024-06-03 20:19:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:13,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:13,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 170 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:13,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:13,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:13,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:14,057 INFO L124 PetriNetUnfolderBase]: 1727/2694 cut-off events. [2024-06-03 20:19:14,057 INFO L125 PetriNetUnfolderBase]: For 91962/91962 co-relation queries the response was YES. [2024-06-03 20:19:14,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 2694 events. 1727/2694 cut-off events. For 91962/91962 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13725 event pairs, 487 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17370. Up to 2483 conditions per place. [2024-06-03 20:19:14,078 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 27 changer transitions 0/200 dead transitions. [2024-06-03 20:19:14,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 200 transitions, 1967 flow [2024-06-03 20:19:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:19:14,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 20:19:14,080 INFO L175 Difference]: Start difference. First operand has 133 places, 170 transitions, 1460 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:19:14,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 200 transitions, 1967 flow [2024-06-03 20:19:14,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 200 transitions, 1858 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:14,165 INFO L231 Difference]: Finished difference. Result has 136 places, 170 transitions, 1414 flow [2024-06-03 20:19:14,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1414, PETRI_PLACES=136, PETRI_TRANSITIONS=170} [2024-06-03 20:19:14,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 20:19:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 170 transitions, 1414 flow [2024-06-03 20:19:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:14,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:14,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:19:14,167 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:14,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1108277006, now seen corresponding path program 3 times [2024-06-03 20:19:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:14,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825634650] [2024-06-03 20:19:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:14,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:14,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825634650] [2024-06-03 20:19:14,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825634650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:14,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201755341] [2024-06-03 20:19:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:14,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:14,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:14,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:14,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 170 transitions, 1414 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:14,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:14,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:14,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:15,562 INFO L124 PetriNetUnfolderBase]: 1744/2718 cut-off events. [2024-06-03 20:19:15,562 INFO L125 PetriNetUnfolderBase]: For 97982/97984 co-relation queries the response was YES. [2024-06-03 20:19:15,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17661 conditions, 2718 events. 1744/2718 cut-off events. For 97982/97984 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13866 event pairs, 478 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 17598. Up to 2449 conditions per place. [2024-06-03 20:19:15,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 44 changer transitions 0/201 dead transitions. [2024-06-03 20:19:15,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 201 transitions, 1971 flow [2024-06-03 20:19:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:19:15,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:19:15,582 INFO L175 Difference]: Start difference. First operand has 136 places, 170 transitions, 1414 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:19:15,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 201 transitions, 1971 flow [2024-06-03 20:19:15,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 201 transitions, 1911 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:15,661 INFO L231 Difference]: Finished difference. Result has 137 places, 172 transitions, 1501 flow [2024-06-03 20:19:15,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1501, PETRI_PLACES=137, PETRI_TRANSITIONS=172} [2024-06-03 20:19:15,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-03 20:19:15,661 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 172 transitions, 1501 flow [2024-06-03 20:19:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:15,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:15,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:19:15,662 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:15,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash 334919258, now seen corresponding path program 4 times [2024-06-03 20:19:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852455595] [2024-06-03 20:19:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:16,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852455595] [2024-06-03 20:19:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852455595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:16,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:16,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591105837] [2024-06-03 20:19:16,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:16,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:16,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 172 transitions, 1501 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:16,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:17,023 INFO L124 PetriNetUnfolderBase]: 1736/2697 cut-off events. [2024-06-03 20:19:17,023 INFO L125 PetriNetUnfolderBase]: For 102141/102141 co-relation queries the response was YES. [2024-06-03 20:19:17,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17788 conditions, 2697 events. 1736/2697 cut-off events. For 102141/102141 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13681 event pairs, 480 based on Foata normal form. 4/2696 useless extension candidates. Maximal degree in co-relation 17724. Up to 2437 conditions per place. [2024-06-03 20:19:17,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 43 changer transitions 0/201 dead transitions. [2024-06-03 20:19:17,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 201 transitions, 2054 flow [2024-06-03 20:19:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:19:17,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 20:19:17,042 INFO L175 Difference]: Start difference. First operand has 137 places, 172 transitions, 1501 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:19:17,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 201 transitions, 2054 flow [2024-06-03 20:19:17,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 201 transitions, 1925 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:17,117 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1521 flow [2024-06-03 20:19:17,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-06-03 20:19:17,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-03 20:19:17,118 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1521 flow [2024-06-03 20:19:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:17,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:17,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:17,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:19:17,119 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:17,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:17,119 INFO L85 PathProgramCache]: Analyzing trace with hash -329922417, now seen corresponding path program 1 times [2024-06-03 20:19:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578583215] [2024-06-03 20:19:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:17,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:17,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578583215] [2024-06-03 20:19:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578583215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:17,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:17,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:17,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107119186] [2024-06-03 20:19:17,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:17,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:17,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:17,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:17,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:17,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:17,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1521 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:17,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:17,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:17,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:18,231 INFO L124 PetriNetUnfolderBase]: 1746/2719 cut-off events. [2024-06-03 20:19:18,231 INFO L125 PetriNetUnfolderBase]: For 106900/106900 co-relation queries the response was YES. [2024-06-03 20:19:18,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18028 conditions, 2719 events. 1746/2719 cut-off events. For 106900/106900 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13801 event pairs, 475 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 17963. Up to 2571 conditions per place. [2024-06-03 20:19:18,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 17 changer transitions 0/197 dead transitions. [2024-06-03 20:19:18,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 197 transitions, 2024 flow [2024-06-03 20:19:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:19:18,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 20:19:18,250 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1521 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:19:18,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 197 transitions, 2024 flow [2024-06-03 20:19:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 197 transitions, 1893 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:18,337 INFO L231 Difference]: Finished difference. Result has 141 places, 180 transitions, 1497 flow [2024-06-03 20:19:18,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1497, PETRI_PLACES=141, PETRI_TRANSITIONS=180} [2024-06-03 20:19:18,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:19:18,338 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 180 transitions, 1497 flow [2024-06-03 20:19:18,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:18,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:18,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:18,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:19:18,338 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:18,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash -329802261, now seen corresponding path program 1 times [2024-06-03 20:19:18,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:18,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199285485] [2024-06-03 20:19:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199285485] [2024-06-03 20:19:18,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199285485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:18,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:18,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:18,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590333360] [2024-06-03 20:19:18,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:18,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:18,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:19,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 180 transitions, 1497 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:19,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:19,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:19,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:19,490 INFO L124 PetriNetUnfolderBase]: 1774/2756 cut-off events. [2024-06-03 20:19:19,490 INFO L125 PetriNetUnfolderBase]: For 112590/112590 co-relation queries the response was YES. [2024-06-03 20:19:19,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18694 conditions, 2756 events. 1774/2756 cut-off events. For 112590/112590 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13967 event pairs, 456 based on Foata normal form. 2/2755 useless extension candidates. Maximal degree in co-relation 18627. Up to 2555 conditions per place. [2024-06-03 20:19:19,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 164 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2024-06-03 20:19:19,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 204 transitions, 2135 flow [2024-06-03 20:19:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:19:19,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 20:19:19,514 INFO L175 Difference]: Start difference. First operand has 141 places, 180 transitions, 1497 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:19:19,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 204 transitions, 2135 flow [2024-06-03 20:19:19,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 204 transitions, 2085 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:19,602 INFO L231 Difference]: Finished difference. Result has 146 places, 188 transitions, 1654 flow [2024-06-03 20:19:19,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1654, PETRI_PLACES=146, PETRI_TRANSITIONS=188} [2024-06-03 20:19:19,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-03 20:19:19,603 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 188 transitions, 1654 flow [2024-06-03 20:19:19,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:19,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:19,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:19,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:19:19,604 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:19,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -329802447, now seen corresponding path program 2 times [2024-06-03 20:19:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936613633] [2024-06-03 20:19:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:20,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:20,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936613633] [2024-06-03 20:19:20,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936613633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:20,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:20,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:20,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996502146] [2024-06-03 20:19:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:20,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:20,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:20,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:20,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 188 transitions, 1654 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:20,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:20,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:20,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:20,784 INFO L124 PetriNetUnfolderBase]: 1792/2785 cut-off events. [2024-06-03 20:19:20,785 INFO L125 PetriNetUnfolderBase]: For 121786/121786 co-relation queries the response was YES. [2024-06-03 20:19:20,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19551 conditions, 2785 events. 1792/2785 cut-off events. For 121786/121786 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14138 event pairs, 473 based on Foata normal form. 2/2786 useless extension candidates. Maximal degree in co-relation 19482. Up to 2622 conditions per place. [2024-06-03 20:19:20,809 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 24 changer transitions 0/210 dead transitions. [2024-06-03 20:19:20,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 210 transitions, 2292 flow [2024-06-03 20:19:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:19:20,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 20:19:20,811 INFO L175 Difference]: Start difference. First operand has 146 places, 188 transitions, 1654 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:19:20,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 210 transitions, 2292 flow [2024-06-03 20:19:20,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 210 transitions, 2197 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:20,959 INFO L231 Difference]: Finished difference. Result has 150 places, 194 transitions, 1715 flow [2024-06-03 20:19:20,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1715, PETRI_PLACES=150, PETRI_TRANSITIONS=194} [2024-06-03 20:19:20,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-03 20:19:20,960 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 194 transitions, 1715 flow [2024-06-03 20:19:20,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:20,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:20,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:20,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:19:20,961 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:20,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1560558301, now seen corresponding path program 2 times [2024-06-03 20:19:20,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002332604] [2024-06-03 20:19:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:20,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:21,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002332604] [2024-06-03 20:19:21,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002332604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:21,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:21,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:21,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447983631] [2024-06-03 20:19:21,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:21,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:21,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:21,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:21,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:21,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:21,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 194 transitions, 1715 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:21,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:21,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:21,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:22,086 INFO L124 PetriNetUnfolderBase]: 1810/2806 cut-off events. [2024-06-03 20:19:22,086 INFO L125 PetriNetUnfolderBase]: For 129801/129805 co-relation queries the response was YES. [2024-06-03 20:19:22,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20119 conditions, 2806 events. 1810/2806 cut-off events. For 129801/129805 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14230 event pairs, 467 based on Foata normal form. 6/2809 useless extension candidates. Maximal degree in co-relation 20048. Up to 2548 conditions per place. [2024-06-03 20:19:22,111 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 168 selfloop transitions, 53 changer transitions 0/226 dead transitions. [2024-06-03 20:19:22,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2591 flow [2024-06-03 20:19:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:19:22,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:19:22,113 INFO L175 Difference]: Start difference. First operand has 150 places, 194 transitions, 1715 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:19:22,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2591 flow [2024-06-03 20:19:22,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 226 transitions, 2529 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:22,247 INFO L231 Difference]: Finished difference. Result has 156 places, 211 transitions, 2059 flow [2024-06-03 20:19:22,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2059, PETRI_PLACES=156, PETRI_TRANSITIONS=211} [2024-06-03 20:19:22,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-03 20:19:22,248 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 211 transitions, 2059 flow [2024-06-03 20:19:22,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:22,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:22,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:22,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:19:22,249 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:22,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:22,249 INFO L85 PathProgramCache]: Analyzing trace with hash -152670927, now seen corresponding path program 3 times [2024-06-03 20:19:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:22,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293761674] [2024-06-03 20:19:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:22,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:22,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293761674] [2024-06-03 20:19:22,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293761674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:22,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:22,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:22,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896872259] [2024-06-03 20:19:22,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:22,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:22,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:22,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:22,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:22,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 211 transitions, 2059 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:22,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:22,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:23,423 INFO L124 PetriNetUnfolderBase]: 1804/2806 cut-off events. [2024-06-03 20:19:23,424 INFO L125 PetriNetUnfolderBase]: For 137290/137292 co-relation queries the response was YES. [2024-06-03 20:19:23,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20742 conditions, 2806 events. 1804/2806 cut-off events. For 137290/137292 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14365 event pairs, 482 based on Foata normal form. 2/2807 useless extension candidates. Maximal degree in co-relation 20667. Up to 2627 conditions per place. [2024-06-03 20:19:23,447 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-03 20:19:23,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2683 flow [2024-06-03 20:19:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:23,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:19:23,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 20:19:23,449 INFO L175 Difference]: Start difference. First operand has 156 places, 211 transitions, 2059 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:19:23,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2683 flow [2024-06-03 20:19:23,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 227 transitions, 2568 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-03 20:19:23,549 INFO L231 Difference]: Finished difference. Result has 161 places, 214 transitions, 2076 flow [2024-06-03 20:19:23,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2076, PETRI_PLACES=161, PETRI_TRANSITIONS=214} [2024-06-03 20:19:23,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-03 20:19:23,549 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 214 transitions, 2076 flow [2024-06-03 20:19:23,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:23,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:23,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:23,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:19:23,550 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:23,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:23,550 INFO L85 PathProgramCache]: Analyzing trace with hash -152670741, now seen corresponding path program 3 times [2024-06-03 20:19:23,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:23,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249704397] [2024-06-03 20:19:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:23,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:24,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249704397] [2024-06-03 20:19:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249704397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:24,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:24,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:24,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504742731] [2024-06-03 20:19:24,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:24,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:24,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:24,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 214 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:24,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:24,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:24,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:24,683 INFO L124 PetriNetUnfolderBase]: 1800/2795 cut-off events. [2024-06-03 20:19:24,684 INFO L125 PetriNetUnfolderBase]: For 140619/140623 co-relation queries the response was YES. [2024-06-03 20:19:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20709 conditions, 2795 events. 1800/2795 cut-off events. For 140619/140623 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14247 event pairs, 466 based on Foata normal form. 6/2798 useless extension candidates. Maximal degree in co-relation 20632. Up to 2538 conditions per place. [2024-06-03 20:19:24,706 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 50 changer transitions 0/231 dead transitions. [2024-06-03 20:19:24,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 231 transitions, 2766 flow [2024-06-03 20:19:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:19:24,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:19:24,708 INFO L175 Difference]: Start difference. First operand has 161 places, 214 transitions, 2076 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:19:24,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 231 transitions, 2766 flow [2024-06-03 20:19:24,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 231 transitions, 2618 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:24,827 INFO L231 Difference]: Finished difference. Result has 164 places, 218 transitions, 2098 flow [2024-06-03 20:19:24,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2098, PETRI_PLACES=164, PETRI_TRANSITIONS=218} [2024-06-03 20:19:24,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-03 20:19:24,827 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 218 transitions, 2098 flow [2024-06-03 20:19:24,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:24,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:24,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:24,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:19:24,828 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:24,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash -152424663, now seen corresponding path program 1 times [2024-06-03 20:19:24,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:24,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306569327] [2024-06-03 20:19:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:24,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306569327] [2024-06-03 20:19:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306569327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884454329] [2024-06-03 20:19:25,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:25,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:25,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:25,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:25,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 218 transitions, 2098 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:25,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:26,315 INFO L124 PetriNetUnfolderBase]: 1698/2690 cut-off events. [2024-06-03 20:19:26,315 INFO L125 PetriNetUnfolderBase]: For 151866/151890 co-relation queries the response was YES. [2024-06-03 20:19:26,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19976 conditions, 2690 events. 1698/2690 cut-off events. For 151866/151890 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13816 event pairs, 454 based on Foata normal form. 12/2672 useless extension candidates. Maximal degree in co-relation 19897. Up to 2333 conditions per place. [2024-06-03 20:19:26,340 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 40 changer transitions 0/236 dead transitions. [2024-06-03 20:19:26,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 236 transitions, 2616 flow [2024-06-03 20:19:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:19:26,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:19:26,342 INFO L175 Difference]: Start difference. First operand has 164 places, 218 transitions, 2098 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:19:26,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 236 transitions, 2616 flow [2024-06-03 20:19:26,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 236 transitions, 2534 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:26,478 INFO L231 Difference]: Finished difference. Result has 169 places, 220 transitions, 2150 flow [2024-06-03 20:19:26,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2150, PETRI_PLACES=169, PETRI_TRANSITIONS=220} [2024-06-03 20:19:26,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:19:26,479 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 220 transitions, 2150 flow [2024-06-03 20:19:26,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:26,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:26,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:26,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:19:26,480 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:26,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 959921467, now seen corresponding path program 1 times [2024-06-03 20:19:26,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163480452] [2024-06-03 20:19:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:27,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163480452] [2024-06-03 20:19:27,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163480452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:27,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:27,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192220781] [2024-06-03 20:19:27,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:27,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:27,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:27,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 220 transitions, 2150 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:27,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:27,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:28,160 INFO L124 PetriNetUnfolderBase]: 2000/3125 cut-off events. [2024-06-03 20:19:28,161 INFO L125 PetriNetUnfolderBase]: For 181048/181048 co-relation queries the response was YES. [2024-06-03 20:19:28,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23652 conditions, 3125 events. 2000/3125 cut-off events. For 181048/181048 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16561 event pairs, 391 based on Foata normal form. 16/3140 useless extension candidates. Maximal degree in co-relation 23572. Up to 2519 conditions per place. [2024-06-03 20:19:28,191 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 39 changer transitions 0/271 dead transitions. [2024-06-03 20:19:28,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 271 transitions, 3104 flow [2024-06-03 20:19:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:19:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:19:28,193 INFO L175 Difference]: Start difference. First operand has 169 places, 220 transitions, 2150 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:19:28,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 271 transitions, 3104 flow [2024-06-03 20:19:28,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 271 transitions, 2998 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:28,354 INFO L231 Difference]: Finished difference. Result has 173 places, 222 transitions, 2202 flow [2024-06-03 20:19:28,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2202, PETRI_PLACES=173, PETRI_TRANSITIONS=222} [2024-06-03 20:19:28,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 20:19:28,355 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 222 transitions, 2202 flow [2024-06-03 20:19:28,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:28,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:28,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:28,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:19:28,355 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:28,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:28,356 INFO L85 PathProgramCache]: Analyzing trace with hash -877118349, now seen corresponding path program 2 times [2024-06-03 20:19:28,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:28,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370044284] [2024-06-03 20:19:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:28,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:29,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:29,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370044284] [2024-06-03 20:19:29,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370044284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:29,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:29,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:29,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598586791] [2024-06-03 20:19:29,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:29,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:29,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:29,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 222 transitions, 2202 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:30,027 INFO L124 PetriNetUnfolderBase]: 2058/3229 cut-off events. [2024-06-03 20:19:30,027 INFO L125 PetriNetUnfolderBase]: For 189309/189309 co-relation queries the response was YES. [2024-06-03 20:19:30,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24443 conditions, 3229 events. 2058/3229 cut-off events. For 189309/189309 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 17252 event pairs, 511 based on Foata normal form. 16/3244 useless extension candidates. Maximal degree in co-relation 24362. Up to 2686 conditions per place. [2024-06-03 20:19:30,059 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 226 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-03 20:19:30,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 267 transitions, 3100 flow [2024-06-03 20:19:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:19:30,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:19:30,061 INFO L175 Difference]: Start difference. First operand has 173 places, 222 transitions, 2202 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:19:30,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 267 transitions, 3100 flow [2024-06-03 20:19:30,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 267 transitions, 3023 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:30,272 INFO L231 Difference]: Finished difference. Result has 176 places, 223 transitions, 2241 flow [2024-06-03 20:19:30,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2241, PETRI_PLACES=176, PETRI_TRANSITIONS=223} [2024-06-03 20:19:30,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-03 20:19:30,273 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 223 transitions, 2241 flow [2024-06-03 20:19:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:30,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:30,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:19:30,273 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:30,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -876970479, now seen corresponding path program 3 times [2024-06-03 20:19:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:30,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169086374] [2024-06-03 20:19:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:30,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:30,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169086374] [2024-06-03 20:19:30,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169086374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:30,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:30,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:30,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496602574] [2024-06-03 20:19:30,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:30,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:30,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:30,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:31,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:31,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 223 transitions, 2241 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:31,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:31,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:31,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:31,894 INFO L124 PetriNetUnfolderBase]: 2022/3171 cut-off events. [2024-06-03 20:19:31,894 INFO L125 PetriNetUnfolderBase]: For 185668/185668 co-relation queries the response was YES. [2024-06-03 20:19:31,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23408 conditions, 3171 events. 2022/3171 cut-off events. For 185668/185668 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16850 event pairs, 507 based on Foata normal form. 20/3190 useless extension candidates. Maximal degree in co-relation 23325. Up to 2794 conditions per place. [2024-06-03 20:19:31,925 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 35 changer transitions 0/262 dead transitions. [2024-06-03 20:19:31,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 262 transitions, 2926 flow [2024-06-03 20:19:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:19:31,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:19:31,927 INFO L175 Difference]: Start difference. First operand has 176 places, 223 transitions, 2241 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:19:31,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 262 transitions, 2926 flow [2024-06-03 20:19:32,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 262 transitions, 2812 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:32,191 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2208 flow [2024-06-03 20:19:32,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2208, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-03 20:19:32,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-03 20:19:32,192 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2208 flow [2024-06-03 20:19:32,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:32,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:32,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:32,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:19:32,194 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:32,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:32,194 INFO L85 PathProgramCache]: Analyzing trace with hash 202601655, now seen corresponding path program 4 times [2024-06-03 20:19:32,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:32,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898426281] [2024-06-03 20:19:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:32,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:32,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:32,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898426281] [2024-06-03 20:19:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898426281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:32,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951385446] [2024-06-03 20:19:32,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:32,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:33,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:33,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2208 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:33,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:33,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:33,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:33,860 INFO L124 PetriNetUnfolderBase]: 2097/3306 cut-off events. [2024-06-03 20:19:33,860 INFO L125 PetriNetUnfolderBase]: For 192425/192427 co-relation queries the response was YES. [2024-06-03 20:19:33,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24016 conditions, 3306 events. 2097/3306 cut-off events. For 192425/192427 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17828 event pairs, 470 based on Foata normal form. 20/3325 useless extension candidates. Maximal degree in co-relation 23932. Up to 2619 conditions per place. [2024-06-03 20:19:33,892 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 176 selfloop transitions, 83 changer transitions 0/264 dead transitions. [2024-06-03 20:19:33,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 264 transitions, 2943 flow [2024-06-03 20:19:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:19:33,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:19:33,893 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2208 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:19:33,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 264 transitions, 2943 flow [2024-06-03 20:19:34,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 264 transitions, 2866 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:19:34,081 INFO L231 Difference]: Finished difference. Result has 179 places, 224 transitions, 2344 flow [2024-06-03 20:19:34,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2344, PETRI_PLACES=179, PETRI_TRANSITIONS=224} [2024-06-03 20:19:34,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-03 20:19:34,082 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 224 transitions, 2344 flow [2024-06-03 20:19:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:34,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:34,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:34,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:19:34,083 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:34,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 129282255, now seen corresponding path program 5 times [2024-06-03 20:19:34,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:34,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144824636] [2024-06-03 20:19:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:34,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144824636] [2024-06-03 20:19:34,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144824636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:34,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:34,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:34,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929184258] [2024-06-03 20:19:34,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:34,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:34,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:34,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 224 transitions, 2344 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:34,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:34,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:34,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:35,781 INFO L124 PetriNetUnfolderBase]: 2172/3435 cut-off events. [2024-06-03 20:19:35,781 INFO L125 PetriNetUnfolderBase]: For 205065/205067 co-relation queries the response was YES. [2024-06-03 20:19:35,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25235 conditions, 3435 events. 2172/3435 cut-off events. For 205065/205067 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18775 event pairs, 506 based on Foata normal form. 20/3454 useless extension candidates. Maximal degree in co-relation 25150. Up to 2744 conditions per place. [2024-06-03 20:19:35,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 82 changer transitions 0/264 dead transitions. [2024-06-03 20:19:35,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 264 transitions, 3074 flow [2024-06-03 20:19:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 20:19:35,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-03 20:19:35,814 INFO L175 Difference]: Start difference. First operand has 179 places, 224 transitions, 2344 flow. Second operand 9 states and 174 transitions. [2024-06-03 20:19:35,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 264 transitions, 3074 flow [2024-06-03 20:19:36,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 264 transitions, 2887 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:36,022 INFO L231 Difference]: Finished difference. Result has 181 places, 225 transitions, 2370 flow [2024-06-03 20:19:36,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2370, PETRI_PLACES=181, PETRI_TRANSITIONS=225} [2024-06-03 20:19:36,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-03 20:19:36,022 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 225 transitions, 2370 flow [2024-06-03 20:19:36,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:36,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:36,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:19:36,023 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:36,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 3151995, now seen corresponding path program 6 times [2024-06-03 20:19:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:36,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280330551] [2024-06-03 20:19:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:36,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:36,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280330551] [2024-06-03 20:19:36,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280330551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:36,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:36,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:36,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743546199] [2024-06-03 20:19:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:36,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:36,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:36,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:36,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 225 transitions, 2370 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:36,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:36,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:36,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:37,639 INFO L124 PetriNetUnfolderBase]: 2230/3522 cut-off events. [2024-06-03 20:19:37,639 INFO L125 PetriNetUnfolderBase]: For 210675/210677 co-relation queries the response was YES. [2024-06-03 20:19:37,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25823 conditions, 3522 events. 2230/3522 cut-off events. For 210675/210677 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19281 event pairs, 500 based on Foata normal form. 16/3537 useless extension candidates. Maximal degree in co-relation 25737. Up to 2612 conditions per place. [2024-06-03 20:19:37,672 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 85 changer transitions 0/268 dead transitions. [2024-06-03 20:19:37,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 268 transitions, 3128 flow [2024-06-03 20:19:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-03 20:19:37,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-03 20:19:37,674 INFO L175 Difference]: Start difference. First operand has 181 places, 225 transitions, 2370 flow. Second operand 9 states and 176 transitions. [2024-06-03 20:19:37,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 268 transitions, 3128 flow [2024-06-03 20:19:37,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 268 transitions, 2941 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:37,924 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 2403 flow [2024-06-03 20:19:37,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2024-06-03 20:19:37,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-03 20:19:37,924 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 2403 flow [2024-06-03 20:19:37,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:37,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:37,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:37,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:19:37,925 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:37,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash 210226167, now seen corresponding path program 1 times [2024-06-03 20:19:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:37,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550974127] [2024-06-03 20:19:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:37,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:38,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:38,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550974127] [2024-06-03 20:19:38,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550974127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:38,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:38,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:19:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119210417] [2024-06-03 20:19:38,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:19:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:19:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:19:38,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:38,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 2403 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:38,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:38,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:38,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:39,826 INFO L124 PetriNetUnfolderBase]: 2271/3600 cut-off events. [2024-06-03 20:19:39,826 INFO L125 PetriNetUnfolderBase]: For 215684/215686 co-relation queries the response was YES. [2024-06-03 20:19:39,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26321 conditions, 3600 events. 2271/3600 cut-off events. For 215684/215686 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20059 event pairs, 496 based on Foata normal form. 12/3611 useless extension candidates. Maximal degree in co-relation 26234. Up to 2554 conditions per place. [2024-06-03 20:19:39,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 179 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-03 20:19:39,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 269 transitions, 3168 flow [2024-06-03 20:19:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:19:39,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 20:19:39,865 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 2403 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:19:39,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 269 transitions, 3168 flow [2024-06-03 20:19:40,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 269 transitions, 2966 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:40,172 INFO L231 Difference]: Finished difference. Result has 185 places, 227 transitions, 2423 flow [2024-06-03 20:19:40,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=185, PETRI_TRANSITIONS=227} [2024-06-03 20:19:40,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-03 20:19:40,173 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 227 transitions, 2423 flow [2024-06-03 20:19:40,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:40,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:40,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:40,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:19:40,174 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:40,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash 537348623, now seen corresponding path program 1 times [2024-06-03 20:19:40,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:40,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839597351] [2024-06-03 20:19:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:40,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:40,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839597351] [2024-06-03 20:19:40,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839597351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:40,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:40,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:40,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184495001] [2024-06-03 20:19:40,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:40,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:40,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:40,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:40,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 227 transitions, 2423 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:40,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:40,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:40,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:41,435 INFO L124 PetriNetUnfolderBase]: 2276/3601 cut-off events. [2024-06-03 20:19:41,436 INFO L125 PetriNetUnfolderBase]: For 209791/209795 co-relation queries the response was YES. [2024-06-03 20:19:41,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26330 conditions, 3601 events. 2276/3601 cut-off events. For 209791/209795 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19899 event pairs, 599 based on Foata normal form. 5/3605 useless extension candidates. Maximal degree in co-relation 26242. Up to 3409 conditions per place. [2024-06-03 20:19:41,470 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 29 changer transitions 0/250 dead transitions. [2024-06-03 20:19:41,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 250 transitions, 3047 flow [2024-06-03 20:19:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:19:41,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 20:19:41,471 INFO L175 Difference]: Start difference. First operand has 185 places, 227 transitions, 2423 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:19:41,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 250 transitions, 3047 flow [2024-06-03 20:19:41,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 250 transitions, 2845 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:41,786 INFO L231 Difference]: Finished difference. Result has 185 places, 230 transitions, 2347 flow [2024-06-03 20:19:41,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2347, PETRI_PLACES=185, PETRI_TRANSITIONS=230} [2024-06-03 20:19:41,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-03 20:19:41,787 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 230 transitions, 2347 flow [2024-06-03 20:19:41,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:41,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:41,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:19:41,787 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:41,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 543062543, now seen corresponding path program 2 times [2024-06-03 20:19:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:41,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797499947] [2024-06-03 20:19:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:42,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:42,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797499947] [2024-06-03 20:19:42,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797499947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:42,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:42,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:42,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103288532] [2024-06-03 20:19:42,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:42,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:42,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:42,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:42,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 230 transitions, 2347 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:42,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:42,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:42,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:43,062 INFO L124 PetriNetUnfolderBase]: 2289/3632 cut-off events. [2024-06-03 20:19:43,062 INFO L125 PetriNetUnfolderBase]: For 215528/215532 co-relation queries the response was YES. [2024-06-03 20:19:43,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26199 conditions, 3632 events. 2289/3632 cut-off events. For 215528/215532 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20205 event pairs, 592 based on Foata normal form. 5/3636 useless extension candidates. Maximal degree in co-relation 26110. Up to 3413 conditions per place. [2024-06-03 20:19:43,097 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 36 changer transitions 0/254 dead transitions. [2024-06-03 20:19:43,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 254 transitions, 3125 flow [2024-06-03 20:19:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:19:43,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:19:43,098 INFO L175 Difference]: Start difference. First operand has 185 places, 230 transitions, 2347 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:19:43,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 254 transitions, 3125 flow [2024-06-03 20:19:43,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 254 transitions, 3049 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:43,424 INFO L231 Difference]: Finished difference. Result has 188 places, 237 transitions, 2497 flow [2024-06-03 20:19:43,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2497, PETRI_PLACES=188, PETRI_TRANSITIONS=237} [2024-06-03 20:19:43,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 20:19:43,425 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 237 transitions, 2497 flow [2024-06-03 20:19:43,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:43,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:43,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:43,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:19:43,431 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:43,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -303966141, now seen corresponding path program 7 times [2024-06-03 20:19:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431703627] [2024-06-03 20:19:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:44,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:44,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431703627] [2024-06-03 20:19:44,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431703627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:44,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:44,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473026542] [2024-06-03 20:19:44,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:44,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:44,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:44,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:44,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:44,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 237 transitions, 2497 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:44,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:44,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:45,118 INFO L124 PetriNetUnfolderBase]: 2364/3759 cut-off events. [2024-06-03 20:19:45,118 INFO L125 PetriNetUnfolderBase]: For 245705/245705 co-relation queries the response was YES. [2024-06-03 20:19:45,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27278 conditions, 3759 events. 2364/3759 cut-off events. For 245705/245705 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21069 event pairs, 528 based on Foata normal form. 20/3774 useless extension candidates. Maximal degree in co-relation 27187. Up to 3063 conditions per place. [2024-06-03 20:19:45,153 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 79 changer transitions 0/277 dead transitions. [2024-06-03 20:19:45,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 277 transitions, 3265 flow [2024-06-03 20:19:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:19:45,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:19:45,154 INFO L175 Difference]: Start difference. First operand has 188 places, 237 transitions, 2497 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:19:45,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 277 transitions, 3265 flow [2024-06-03 20:19:45,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 277 transitions, 3189 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:45,492 INFO L231 Difference]: Finished difference. Result has 193 places, 238 transitions, 2634 flow [2024-06-03 20:19:45,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2634, PETRI_PLACES=193, PETRI_TRANSITIONS=238} [2024-06-03 20:19:45,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-03 20:19:45,493 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 238 transitions, 2634 flow [2024-06-03 20:19:45,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:45,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:45,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:45,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:19:45,493 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:45,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1823569209, now seen corresponding path program 8 times [2024-06-03 20:19:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:45,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517738671] [2024-06-03 20:19:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:46,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:46,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517738671] [2024-06-03 20:19:46,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517738671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:46,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:46,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055710213] [2024-06-03 20:19:46,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:46,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:46,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:46,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:46,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 238 transitions, 2634 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:46,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:46,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:46,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:47,134 INFO L124 PetriNetUnfolderBase]: 2439/3876 cut-off events. [2024-06-03 20:19:47,134 INFO L125 PetriNetUnfolderBase]: For 261592/261592 co-relation queries the response was YES. [2024-06-03 20:19:47,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 3876 events. 2439/3876 cut-off events. For 261592/261592 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21927 event pairs, 539 based on Foata normal form. 20/3891 useless extension candidates. Maximal degree in co-relation 28523. Up to 3188 conditions per place. [2024-06-03 20:19:47,170 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 82 changer transitions 0/276 dead transitions. [2024-06-03 20:19:47,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 3388 flow [2024-06-03 20:19:47,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:19:47,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:19:47,172 INFO L175 Difference]: Start difference. First operand has 193 places, 238 transitions, 2634 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:19:47,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 3388 flow [2024-06-03 20:19:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 276 transitions, 3201 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:47,444 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 2668 flow [2024-06-03 20:19:47,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2668, PETRI_PLACES=195, PETRI_TRANSITIONS=239} [2024-06-03 20:19:47,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-03 20:19:47,444 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 2668 flow [2024-06-03 20:19:47,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:47,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:47,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:47,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:19:47,445 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:47,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:47,445 INFO L85 PathProgramCache]: Analyzing trace with hash -588097909, now seen corresponding path program 9 times [2024-06-03 20:19:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142257336] [2024-06-03 20:19:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:48,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:48,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142257336] [2024-06-03 20:19:48,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142257336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:48,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:48,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752006008] [2024-06-03 20:19:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:48,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:48,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:48,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:48,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 239 transitions, 2668 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:48,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:48,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:48,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:49,164 INFO L124 PetriNetUnfolderBase]: 2514/4001 cut-off events. [2024-06-03 20:19:49,164 INFO L125 PetriNetUnfolderBase]: For 272550/272550 co-relation queries the response was YES. [2024-06-03 20:19:49,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29448 conditions, 4001 events. 2514/4001 cut-off events. For 272550/272550 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22829 event pairs, 558 based on Foata normal form. 20/4016 useless extension candidates. Maximal degree in co-relation 29355. Up to 3313 conditions per place. [2024-06-03 20:19:49,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 84 changer transitions 0/278 dead transitions. [2024-06-03 20:19:49,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 278 transitions, 3435 flow [2024-06-03 20:19:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:19:49,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:19:49,211 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 2668 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:19:49,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 278 transitions, 3435 flow [2024-06-03 20:19:49,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 278 transitions, 3240 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:49,562 INFO L231 Difference]: Finished difference. Result has 197 places, 240 transitions, 2700 flow [2024-06-03 20:19:49,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2700, PETRI_PLACES=197, PETRI_TRANSITIONS=240} [2024-06-03 20:19:49,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 20:19:49,576 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 240 transitions, 2700 flow [2024-06-03 20:19:49,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:49,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:49,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:49,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:19:49,577 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:49,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1922916475, now seen corresponding path program 10 times [2024-06-03 20:19:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464532938] [2024-06-03 20:19:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:49,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:50,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464532938] [2024-06-03 20:19:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464532938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54898657] [2024-06-03 20:19:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:50,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:50,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 240 transitions, 2700 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:50,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:50,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:50,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:51,358 INFO L124 PetriNetUnfolderBase]: 2522/4031 cut-off events. [2024-06-03 20:19:51,358 INFO L125 PetriNetUnfolderBase]: For 266736/266736 co-relation queries the response was YES. [2024-06-03 20:19:51,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29124 conditions, 4031 events. 2522/4031 cut-off events. For 266736/266736 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23154 event pairs, 550 based on Foata normal form. 16/4042 useless extension candidates. Maximal degree in co-relation 29030. Up to 2983 conditions per place. [2024-06-03 20:19:51,402 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 86 changer transitions 0/281 dead transitions. [2024-06-03 20:19:51,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 281 transitions, 3486 flow [2024-06-03 20:19:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:19:51,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:19:51,405 INFO L175 Difference]: Start difference. First operand has 197 places, 240 transitions, 2700 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:19:51,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 281 transitions, 3486 flow [2024-06-03 20:19:51,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 281 transitions, 3285 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:51,804 INFO L231 Difference]: Finished difference. Result has 199 places, 241 transitions, 2731 flow [2024-06-03 20:19:51,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2499, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2731, PETRI_PLACES=199, PETRI_TRANSITIONS=241} [2024-06-03 20:19:51,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-03 20:19:51,805 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 241 transitions, 2731 flow [2024-06-03 20:19:51,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:51,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:51,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:51,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:19:51,806 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:51,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2030639661, now seen corresponding path program 2 times [2024-06-03 20:19:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:51,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483129743] [2024-06-03 20:19:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:52,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483129743] [2024-06-03 20:19:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483129743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:52,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:19:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155254100] [2024-06-03 20:19:52,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:52,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:19:52,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:19:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:19:52,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:52,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 241 transitions, 2731 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:52,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:52,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:52,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:53,903 INFO L124 PetriNetUnfolderBase]: 2563/4105 cut-off events. [2024-06-03 20:19:53,903 INFO L125 PetriNetUnfolderBase]: For 270226/270226 co-relation queries the response was YES. [2024-06-03 20:19:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29564 conditions, 4105 events. 2563/4105 cut-off events. For 270226/270226 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23807 event pairs, 569 based on Foata normal form. 12/4112 useless extension candidates. Maximal degree in co-relation 29469. Up to 3194 conditions per place. [2024-06-03 20:19:53,938 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-03 20:19:53,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 283 transitions, 3533 flow [2024-06-03 20:19:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:19:53,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:19:53,940 INFO L175 Difference]: Start difference. First operand has 199 places, 241 transitions, 2731 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:19:53,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 283 transitions, 3533 flow [2024-06-03 20:19:54,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 283 transitions, 3319 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:54,301 INFO L231 Difference]: Finished difference. Result has 201 places, 242 transitions, 2741 flow [2024-06-03 20:19:54,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2741, PETRI_PLACES=201, PETRI_TRANSITIONS=242} [2024-06-03 20:19:54,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-03 20:19:54,301 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 242 transitions, 2741 flow [2024-06-03 20:19:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:54,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:54,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:54,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:19:54,302 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:54,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -331122727, now seen corresponding path program 3 times [2024-06-03 20:19:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561502686] [2024-06-03 20:19:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:55,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561502686] [2024-06-03 20:19:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561502686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:55,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:55,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:19:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828405786] [2024-06-03 20:19:55,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:55,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:19:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:19:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:19:55,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:55,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 242 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:55,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:55,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:56,294 INFO L124 PetriNetUnfolderBase]: 2604/4188 cut-off events. [2024-06-03 20:19:56,294 INFO L125 PetriNetUnfolderBase]: For 278547/278547 co-relation queries the response was YES. [2024-06-03 20:19:56,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29923 conditions, 4188 events. 2604/4188 cut-off events. For 278547/278547 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24512 event pairs, 572 based on Foata normal form. 12/4195 useless extension candidates. Maximal degree in co-relation 29827. Up to 3385 conditions per place. [2024-06-03 20:19:56,335 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 194 selfloop transitions, 85 changer transitions 0/284 dead transitions. [2024-06-03 20:19:56,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 284 transitions, 3548 flow [2024-06-03 20:19:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:56,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:19:56,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:19:56,336 INFO L175 Difference]: Start difference. First operand has 201 places, 242 transitions, 2741 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:19:56,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 284 transitions, 3548 flow [2024-06-03 20:19:56,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 284 transitions, 3344 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:56,722 INFO L231 Difference]: Finished difference. Result has 203 places, 243 transitions, 2771 flow [2024-06-03 20:19:56,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2771, PETRI_PLACES=203, PETRI_TRANSITIONS=243} [2024-06-03 20:19:56,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 20:19:56,722 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 243 transitions, 2771 flow [2024-06-03 20:19:56,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:56,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:56,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:56,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:19:56,723 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:56,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash -18612789, now seen corresponding path program 4 times [2024-06-03 20:19:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:56,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314997108] [2024-06-03 20:19:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:56,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:57,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314997108] [2024-06-03 20:19:57,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314997108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:57,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:57,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:19:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534799631] [2024-06-03 20:19:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:19:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:57,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:19:57,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:19:57,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:57,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 243 transitions, 2771 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:57,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:57,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:57,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:58,592 INFO L124 PetriNetUnfolderBase]: 2584/4156 cut-off events. [2024-06-03 20:19:58,593 INFO L125 PetriNetUnfolderBase]: For 269541/269541 co-relation queries the response was YES. [2024-06-03 20:19:58,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29020 conditions, 4156 events. 2584/4156 cut-off events. For 269541/269541 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24351 event pairs, 508 based on Foata normal form. 12/4163 useless extension candidates. Maximal degree in co-relation 28923. Up to 2434 conditions per place. [2024-06-03 20:19:58,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 96 changer transitions 0/282 dead transitions. [2024-06-03 20:19:58,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 282 transitions, 3426 flow [2024-06-03 20:19:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:19:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:19:58,656 INFO L175 Difference]: Start difference. First operand has 203 places, 243 transitions, 2771 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:19:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 282 transitions, 3426 flow [2024-06-03 20:19:59,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 282 transitions, 3212 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:59,104 INFO L231 Difference]: Finished difference. Result has 204 places, 242 transitions, 2669 flow [2024-06-03 20:19:59,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2669, PETRI_PLACES=204, PETRI_TRANSITIONS=242} [2024-06-03 20:19:59,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-03 20:19:59,106 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 242 transitions, 2669 flow [2024-06-03 20:19:59,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:59,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:59,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:59,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:19:59,107 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:59,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1646329329, now seen corresponding path program 3 times [2024-06-03 20:19:59,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:59,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554409223] [2024-06-03 20:19:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:59,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:59,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:59,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554409223] [2024-06-03 20:19:59,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554409223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:59,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:59,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686699413] [2024-06-03 20:19:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:59,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:59,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:59,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:59,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:19:59,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 242 transitions, 2669 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:59,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:59,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:19:59,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:00,432 INFO L124 PetriNetUnfolderBase]: 2581/4160 cut-off events. [2024-06-03 20:20:00,432 INFO L125 PetriNetUnfolderBase]: For 260112/260112 co-relation queries the response was YES. [2024-06-03 20:20:00,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28970 conditions, 4160 events. 2581/4160 cut-off events. For 260112/260112 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24365 event pairs, 665 based on Foata normal form. 1/4158 useless extension candidates. Maximal degree in co-relation 28872. Up to 3930 conditions per place. [2024-06-03 20:20:00,475 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 226 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-03 20:20:00,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 260 transitions, 3251 flow [2024-06-03 20:20:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:20:00,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 20:20:00,476 INFO L175 Difference]: Start difference. First operand has 204 places, 242 transitions, 2669 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:20:00,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 260 transitions, 3251 flow [2024-06-03 20:20:01,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 260 transitions, 2964 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:01,038 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2447 flow [2024-06-03 20:20:01,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2447, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-03 20:20:01,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-03 20:20:01,039 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2447 flow [2024-06-03 20:20:01,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:01,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:01,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:01,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:20:01,040 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:01,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1633949169, now seen corresponding path program 4 times [2024-06-03 20:20:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:01,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50604388] [2024-06-03 20:20:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:01,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50604388] [2024-06-03 20:20:01,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50604388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:01,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:01,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:01,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976803149] [2024-06-03 20:20:01,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:01,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:01,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:01,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:01,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:01,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2447 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:01,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:01,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:02,565 INFO L124 PetriNetUnfolderBase]: 2573/4147 cut-off events. [2024-06-03 20:20:02,565 INFO L125 PetriNetUnfolderBase]: For 260508/260508 co-relation queries the response was YES. [2024-06-03 20:20:02,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28029 conditions, 4147 events. 2573/4147 cut-off events. For 260508/260508 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24238 event pairs, 663 based on Foata normal form. 2/4146 useless extension candidates. Maximal degree in co-relation 27931. Up to 3893 conditions per place. [2024-06-03 20:20:02,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 39 changer transitions 0/257 dead transitions. [2024-06-03 20:20:02,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 257 transitions, 3011 flow [2024-06-03 20:20:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:02,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:20:02,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 20:20:02,605 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2447 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:20:02,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 257 transitions, 3011 flow [2024-06-03 20:20:03,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 2903 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:03,047 INFO L231 Difference]: Finished difference. Result has 204 places, 242 transitions, 2425 flow [2024-06-03 20:20:03,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2425, PETRI_PLACES=204, PETRI_TRANSITIONS=242} [2024-06-03 20:20:03,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-03 20:20:03,048 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 242 transitions, 2425 flow [2024-06-03 20:20:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:03,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:03,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:20:03,049 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:03,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1118815005, now seen corresponding path program 5 times [2024-06-03 20:20:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:03,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105787165] [2024-06-03 20:20:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:03,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:03,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:03,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105787165] [2024-06-03 20:20:03,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105787165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:03,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:03,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:03,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35129185] [2024-06-03 20:20:03,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:03,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:03,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:03,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:03,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:03,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 242 transitions, 2425 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:03,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:03,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:03,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:04,360 INFO L124 PetriNetUnfolderBase]: 2583/4161 cut-off events. [2024-06-03 20:20:04,361 INFO L125 PetriNetUnfolderBase]: For 268081/268085 co-relation queries the response was YES. [2024-06-03 20:20:04,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28038 conditions, 4161 events. 2583/4161 cut-off events. For 268081/268085 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24326 event pairs, 676 based on Foata normal form. 6/4164 useless extension candidates. Maximal degree in co-relation 27940. Up to 3846 conditions per place. [2024-06-03 20:20:04,401 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 61 changer transitions 0/258 dead transitions. [2024-06-03 20:20:04,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 258 transitions, 3150 flow [2024-06-03 20:20:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 20:20:04,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 20:20:04,402 INFO L175 Difference]: Start difference. First operand has 204 places, 242 transitions, 2425 flow. Second operand 7 states and 121 transitions. [2024-06-03 20:20:04,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 258 transitions, 3150 flow [2024-06-03 20:20:04,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 258 transitions, 3043 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:04,858 INFO L231 Difference]: Finished difference. Result has 205 places, 246 transitions, 2508 flow [2024-06-03 20:20:04,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2508, PETRI_PLACES=205, PETRI_TRANSITIONS=246} [2024-06-03 20:20:04,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-03 20:20:04,859 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 246 transitions, 2508 flow [2024-06-03 20:20:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:04,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:04,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:04,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:20:04,860 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:04,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash -444505585, now seen corresponding path program 6 times [2024-06-03 20:20:04,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:04,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482586535] [2024-06-03 20:20:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:04,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:05,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482586535] [2024-06-03 20:20:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482586535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:05,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:05,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:05,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286701314] [2024-06-03 20:20:05,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:05,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:05,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:05,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:05,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 246 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:05,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:05,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:05,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:06,354 INFO L124 PetriNetUnfolderBase]: 2575/4150 cut-off events. [2024-06-03 20:20:06,354 INFO L125 PetriNetUnfolderBase]: For 272737/272741 co-relation queries the response was YES. [2024-06-03 20:20:06,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28023 conditions, 4150 events. 2575/4150 cut-off events. For 272737/272741 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24313 event pairs, 676 based on Foata normal form. 6/4153 useless extension candidates. Maximal degree in co-relation 27924. Up to 3838 conditions per place. [2024-06-03 20:20:06,401 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 65 changer transitions 0/257 dead transitions. [2024-06-03 20:20:06,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 257 transitions, 3052 flow [2024-06-03 20:20:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 20:20:06,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 20:20:06,403 INFO L175 Difference]: Start difference. First operand has 205 places, 246 transitions, 2508 flow. Second operand 7 states and 120 transitions. [2024-06-03 20:20:06,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 257 transitions, 3052 flow [2024-06-03 20:20:06,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 257 transitions, 2907 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:06,937 INFO L231 Difference]: Finished difference. Result has 208 places, 246 transitions, 2500 flow [2024-06-03 20:20:06,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2500, PETRI_PLACES=208, PETRI_TRANSITIONS=246} [2024-06-03 20:20:06,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-03 20:20:06,939 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 246 transitions, 2500 flow [2024-06-03 20:20:06,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:06,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:06,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:06,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:20:06,940 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:06,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash -430212849, now seen corresponding path program 1 times [2024-06-03 20:20:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:06,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251530957] [2024-06-03 20:20:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:07,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:07,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251530957] [2024-06-03 20:20:07,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251530957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:07,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:07,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:07,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441467873] [2024-06-03 20:20:07,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:07,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:07,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:07,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:07,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:07,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 246 transitions, 2500 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:07,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:07,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:07,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:08,534 INFO L124 PetriNetUnfolderBase]: 2438/3967 cut-off events. [2024-06-03 20:20:08,534 INFO L125 PetriNetUnfolderBase]: For 283797/283821 co-relation queries the response was YES. [2024-06-03 20:20:08,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27308 conditions, 3967 events. 2438/3967 cut-off events. For 283797/283821 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23352 event pairs, 629 based on Foata normal form. 2/3921 useless extension candidates. Maximal degree in co-relation 27208. Up to 3593 conditions per place. [2024-06-03 20:20:08,570 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 38 changer transitions 0/264 dead transitions. [2024-06-03 20:20:08,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 264 transitions, 3190 flow [2024-06-03 20:20:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 20:20:08,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 20:20:08,572 INFO L175 Difference]: Start difference. First operand has 208 places, 246 transitions, 2500 flow. Second operand 7 states and 123 transitions. [2024-06-03 20:20:08,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 264 transitions, 3190 flow [2024-06-03 20:20:08,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 264 transitions, 2969 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:08,938 INFO L231 Difference]: Finished difference. Result has 207 places, 252 transitions, 2435 flow [2024-06-03 20:20:08,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2435, PETRI_PLACES=207, PETRI_TRANSITIONS=252} [2024-06-03 20:20:08,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-03 20:20:08,938 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 252 transitions, 2435 flow [2024-06-03 20:20:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:08,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:08,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:20:08,939 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:08,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -430688079, now seen corresponding path program 2 times [2024-06-03 20:20:08,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233831305] [2024-06-03 20:20:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:09,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233831305] [2024-06-03 20:20:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233831305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:09,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:09,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:09,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753436011] [2024-06-03 20:20:09,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:09,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:09,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:09,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:09,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:09,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:09,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 252 transitions, 2435 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:09,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:09,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:09,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:10,515 INFO L124 PetriNetUnfolderBase]: 2432/3959 cut-off events. [2024-06-03 20:20:10,516 INFO L125 PetriNetUnfolderBase]: For 290420/290454 co-relation queries the response was YES. [2024-06-03 20:20:10,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27460 conditions, 3959 events. 2432/3959 cut-off events. For 290420/290454 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 23335 event pairs, 629 based on Foata normal form. 2/3913 useless extension candidates. Maximal degree in co-relation 27360. Up to 3600 conditions per place. [2024-06-03 20:20:10,622 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 35 changer transitions 0/263 dead transitions. [2024-06-03 20:20:10,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 263 transitions, 2929 flow [2024-06-03 20:20:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:20:10,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 20:20:10,623 INFO L175 Difference]: Start difference. First operand has 207 places, 252 transitions, 2435 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:20:10,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 263 transitions, 2929 flow [2024-06-03 20:20:11,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 263 transitions, 2845 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:11,051 INFO L231 Difference]: Finished difference. Result has 211 places, 252 transitions, 2428 flow [2024-06-03 20:20:11,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2428, PETRI_PLACES=211, PETRI_TRANSITIONS=252} [2024-06-03 20:20:11,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-03 20:20:11,052 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 252 transitions, 2428 flow [2024-06-03 20:20:11,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:11,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:11,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:11,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:20:11,053 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:11,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1637749521, now seen corresponding path program 1 times [2024-06-03 20:20:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:11,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113232795] [2024-06-03 20:20:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:11,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:11,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113232795] [2024-06-03 20:20:11,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113232795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:11,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:11,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929346652] [2024-06-03 20:20:11,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:11,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:11,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:11,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:11,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 252 transitions, 2428 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:11,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:11,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:11,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:12,666 INFO L124 PetriNetUnfolderBase]: 2576/4156 cut-off events. [2024-06-03 20:20:12,667 INFO L125 PetriNetUnfolderBase]: For 290463/290463 co-relation queries the response was YES. [2024-06-03 20:20:12,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28411 conditions, 4156 events. 2576/4156 cut-off events. For 290463/290463 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24355 event pairs, 675 based on Foata normal form. 1/4156 useless extension candidates. Maximal degree in co-relation 28309. Up to 3953 conditions per place. [2024-06-03 20:20:12,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 21 changer transitions 0/270 dead transitions. [2024-06-03 20:20:12,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 270 transitions, 3033 flow [2024-06-03 20:20:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 20:20:12,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 20:20:12,711 INFO L175 Difference]: Start difference. First operand has 211 places, 252 transitions, 2428 flow. Second operand 8 states and 130 transitions. [2024-06-03 20:20:12,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 270 transitions, 3033 flow [2024-06-03 20:20:13,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 270 transitions, 2927 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:13,272 INFO L231 Difference]: Finished difference. Result has 214 places, 254 transitions, 2394 flow [2024-06-03 20:20:13,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2394, PETRI_PLACES=214, PETRI_TRANSITIONS=254} [2024-06-03 20:20:13,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-03 20:20:13,273 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 254 transitions, 2394 flow [2024-06-03 20:20:13,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:13,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:13,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:13,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:20:13,274 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:13,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1637659156, now seen corresponding path program 1 times [2024-06-03 20:20:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:13,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487336249] [2024-06-03 20:20:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:13,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:13,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487336249] [2024-06-03 20:20:13,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487336249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:13,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:13,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:13,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258414413] [2024-06-03 20:20:13,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:13,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:13,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:13,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:13,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 254 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:13,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:13,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:13,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:14,662 INFO L124 PetriNetUnfolderBase]: 2632/4235 cut-off events. [2024-06-03 20:20:14,662 INFO L125 PetriNetUnfolderBase]: For 312550/312550 co-relation queries the response was YES. [2024-06-03 20:20:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29215 conditions, 4235 events. 2632/4235 cut-off events. For 312550/312550 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24844 event pairs, 615 based on Foata normal form. 4/4237 useless extension candidates. Maximal degree in co-relation 29111. Up to 3824 conditions per place. [2024-06-03 20:20:14,706 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 75 changer transitions 0/298 dead transitions. [2024-06-03 20:20:14,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 298 transitions, 3441 flow [2024-06-03 20:20:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:20:14,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:20:14,714 INFO L175 Difference]: Start difference. First operand has 214 places, 254 transitions, 2394 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:20:14,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 298 transitions, 3441 flow [2024-06-03 20:20:15,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 298 transitions, 3387 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:15,187 INFO L231 Difference]: Finished difference. Result has 218 places, 277 transitions, 2797 flow [2024-06-03 20:20:15,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2797, PETRI_PLACES=218, PETRI_TRANSITIONS=277} [2024-06-03 20:20:15,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 20:20:15,188 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 277 transitions, 2797 flow [2024-06-03 20:20:15,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:15,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:15,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:15,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:20:15,188 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:15,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1436203166, now seen corresponding path program 2 times [2024-06-03 20:20:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122697007] [2024-06-03 20:20:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:15,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:15,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122697007] [2024-06-03 20:20:15,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122697007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:15,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:15,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:15,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611203511] [2024-06-03 20:20:15,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:15,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:15,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:15,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:15,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 277 transitions, 2797 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:15,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:15,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:15,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:16,755 INFO L124 PetriNetUnfolderBase]: 2808/4478 cut-off events. [2024-06-03 20:20:16,756 INFO L125 PetriNetUnfolderBase]: For 371083/371083 co-relation queries the response was YES. [2024-06-03 20:20:16,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33434 conditions, 4478 events. 2808/4478 cut-off events. For 371083/371083 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26239 event pairs, 630 based on Foata normal form. 4/4479 useless extension candidates. Maximal degree in co-relation 33327. Up to 3828 conditions per place. [2024-06-03 20:20:16,807 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 89 changer transitions 0/313 dead transitions. [2024-06-03 20:20:16,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 313 transitions, 4041 flow [2024-06-03 20:20:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:20:16,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 20:20:16,816 INFO L175 Difference]: Start difference. First operand has 218 places, 277 transitions, 2797 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:20:16,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 313 transitions, 4041 flow [2024-06-03 20:20:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 313 transitions, 3921 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:17,439 INFO L231 Difference]: Finished difference. Result has 225 places, 290 transitions, 3138 flow [2024-06-03 20:20:17,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3138, PETRI_PLACES=225, PETRI_TRANSITIONS=290} [2024-06-03 20:20:17,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-03 20:20:17,439 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 290 transitions, 3138 flow [2024-06-03 20:20:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:17,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:17,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:17,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:20:17,440 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:17,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1633934506, now seen corresponding path program 3 times [2024-06-03 20:20:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:17,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173888664] [2024-06-03 20:20:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:18,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173888664] [2024-06-03 20:20:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173888664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:18,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:18,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:18,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734827334] [2024-06-03 20:20:18,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:18,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:18,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:18,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:18,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 290 transitions, 3138 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:18,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:18,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:18,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:19,026 INFO L124 PetriNetUnfolderBase]: 2856/4559 cut-off events. [2024-06-03 20:20:19,026 INFO L125 PetriNetUnfolderBase]: For 391178/391178 co-relation queries the response was YES. [2024-06-03 20:20:19,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34850 conditions, 4559 events. 2856/4559 cut-off events. For 391178/391178 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26774 event pairs, 624 based on Foata normal form. 8/4564 useless extension candidates. Maximal degree in co-relation 34740. Up to 3875 conditions per place. [2024-06-03 20:20:19,077 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 102 changer transitions 0/322 dead transitions. [2024-06-03 20:20:19,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 322 transitions, 4350 flow [2024-06-03 20:20:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:20:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:20:19,079 INFO L175 Difference]: Start difference. First operand has 225 places, 290 transitions, 3138 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:20:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 322 transitions, 4350 flow [2024-06-03 20:20:19,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 322 transitions, 4153 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:19,779 INFO L231 Difference]: Finished difference. Result has 232 places, 301 transitions, 3458 flow [2024-06-03 20:20:19,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=232, PETRI_TRANSITIONS=301} [2024-06-03 20:20:19,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-03 20:20:19,780 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 301 transitions, 3458 flow [2024-06-03 20:20:19,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:19,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:19,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:19,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:20:19,781 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:19,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:19,781 INFO L85 PathProgramCache]: Analyzing trace with hash 926014845, now seen corresponding path program 1 times [2024-06-03 20:20:19,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:19,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948997033] [2024-06-03 20:20:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:19,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:20,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948997033] [2024-06-03 20:20:20,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948997033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:20,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:20,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142419827] [2024-06-03 20:20:20,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:20,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:20,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:20,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:20,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 301 transitions, 3458 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:20,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:20,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:20,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:21,586 INFO L124 PetriNetUnfolderBase]: 2836/4527 cut-off events. [2024-06-03 20:20:21,587 INFO L125 PetriNetUnfolderBase]: For 385154/385154 co-relation queries the response was YES. [2024-06-03 20:20:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34734 conditions, 4527 events. 2836/4527 cut-off events. For 385154/385154 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26535 event pairs, 628 based on Foata normal form. 6/4530 useless extension candidates. Maximal degree in co-relation 34620. Up to 3922 conditions per place. [2024-06-03 20:20:21,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 109 changer transitions 0/332 dead transitions. [2024-06-03 20:20:21,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 332 transitions, 4682 flow [2024-06-03 20:20:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:20:21,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:20:21,643 INFO L175 Difference]: Start difference. First operand has 232 places, 301 transitions, 3458 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:20:21,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 332 transitions, 4682 flow [2024-06-03 20:20:22,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 332 transitions, 4507 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:22,323 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 3843 flow [2024-06-03 20:20:22,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-06-03 20:20:22,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 20:20:22,324 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 3843 flow [2024-06-03 20:20:22,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:22,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:22,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:22,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:20:22,324 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:22,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1125316635, now seen corresponding path program 2 times [2024-06-03 20:20:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:22,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413776728] [2024-06-03 20:20:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:23,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:23,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413776728] [2024-06-03 20:20:23,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413776728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:23,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:23,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905493862] [2024-06-03 20:20:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:23,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:23,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:23,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:23,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:23,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:23,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:24,050 INFO L124 PetriNetUnfolderBase]: 2906/4624 cut-off events. [2024-06-03 20:20:24,050 INFO L125 PetriNetUnfolderBase]: For 409244/409246 co-relation queries the response was YES. [2024-06-03 20:20:24,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36456 conditions, 4624 events. 2906/4624 cut-off events. For 409244/409246 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27150 event pairs, 692 based on Foata normal form. 6/4627 useless extension candidates. Maximal degree in co-relation 36338. Up to 3898 conditions per place. [2024-06-03 20:20:24,105 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 124 changer transitions 0/344 dead transitions. [2024-06-03 20:20:24,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 344 transitions, 5283 flow [2024-06-03 20:20:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:20:24,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 20:20:24,106 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 3843 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:20:24,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 344 transitions, 5283 flow [2024-06-03 20:20:24,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 344 transitions, 5146 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:24,881 INFO L231 Difference]: Finished difference. Result has 246 places, 326 transitions, 4273 flow [2024-06-03 20:20:24,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4273, PETRI_PLACES=246, PETRI_TRANSITIONS=326} [2024-06-03 20:20:24,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-03 20:20:24,882 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 326 transitions, 4273 flow [2024-06-03 20:20:24,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:24,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:24,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:24,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:20:24,883 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:24,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash 420684836, now seen corresponding path program 4 times [2024-06-03 20:20:24,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079795101] [2024-06-03 20:20:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:24,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:25,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079795101] [2024-06-03 20:20:25,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079795101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:25,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:25,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056194368] [2024-06-03 20:20:25,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:25,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:25,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:25,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 326 transitions, 4273 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:25,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:25,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:25,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:26,632 INFO L124 PetriNetUnfolderBase]: 2946/4683 cut-off events. [2024-06-03 20:20:26,633 INFO L125 PetriNetUnfolderBase]: For 431331/431333 co-relation queries the response was YES. [2024-06-03 20:20:26,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38181 conditions, 4683 events. 2946/4683 cut-off events. For 431331/431333 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27467 event pairs, 680 based on Foata normal form. 8/4688 useless extension candidates. Maximal degree in co-relation 38059. Up to 3729 conditions per place. [2024-06-03 20:20:26,687 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 218 selfloop transitions, 141 changer transitions 0/364 dead transitions. [2024-06-03 20:20:26,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 364 transitions, 5834 flow [2024-06-03 20:20:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:26,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:20:26,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-03 20:20:26,689 INFO L175 Difference]: Start difference. First operand has 246 places, 326 transitions, 4273 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:20:26,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 364 transitions, 5834 flow [2024-06-03 20:20:27,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 364 transitions, 5530 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:27,530 INFO L231 Difference]: Finished difference. Result has 253 places, 345 transitions, 4662 flow [2024-06-03 20:20:27,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4662, PETRI_PLACES=253, PETRI_TRANSITIONS=345} [2024-06-03 20:20:27,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-03 20:20:27,531 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 345 transitions, 4662 flow [2024-06-03 20:20:27,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:27,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:27,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:27,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:20:27,532 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:27,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash -430472815, now seen corresponding path program 3 times [2024-06-03 20:20:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:27,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434357238] [2024-06-03 20:20:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:27,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434357238] [2024-06-03 20:20:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434357238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848698268] [2024-06-03 20:20:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:28,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:28,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 345 transitions, 4662 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:28,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:28,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:28,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:29,532 INFO L124 PetriNetUnfolderBase]: 3000/4756 cut-off events. [2024-06-03 20:20:29,533 INFO L125 PetriNetUnfolderBase]: For 445858/445860 co-relation queries the response was YES. [2024-06-03 20:20:29,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39651 conditions, 4756 events. 3000/4756 cut-off events. For 445858/445860 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27839 event pairs, 669 based on Foata normal form. 6/4759 useless extension candidates. Maximal degree in co-relation 39526. Up to 4011 conditions per place. [2024-06-03 20:20:29,596 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 216 selfloop transitions, 150 changer transitions 0/371 dead transitions. [2024-06-03 20:20:29,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 371 transitions, 6075 flow [2024-06-03 20:20:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:20:29,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 20:20:29,597 INFO L175 Difference]: Start difference. First operand has 253 places, 345 transitions, 4662 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:20:29,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 371 transitions, 6075 flow [2024-06-03 20:20:30,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 371 transitions, 5899 flow, removed 87 selfloop flow, removed 1 redundant places. [2024-06-03 20:20:30,364 INFO L231 Difference]: Finished difference. Result has 260 places, 354 transitions, 5008 flow [2024-06-03 20:20:30,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5008, PETRI_PLACES=260, PETRI_TRANSITIONS=354} [2024-06-03 20:20:30,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-03 20:20:30,374 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 354 transitions, 5008 flow [2024-06-03 20:20:30,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:30,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:30,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:30,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:20:30,374 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:30,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash -430473032, now seen corresponding path program 5 times [2024-06-03 20:20:30,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296519443] [2024-06-03 20:20:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:30,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296519443] [2024-06-03 20:20:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296519443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143354546] [2024-06-03 20:20:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:31,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:31,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:31,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 354 transitions, 5008 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:31,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:31,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:31,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:32,205 INFO L124 PetriNetUnfolderBase]: 3000/4766 cut-off events. [2024-06-03 20:20:32,206 INFO L125 PetriNetUnfolderBase]: For 449235/449237 co-relation queries the response was YES. [2024-06-03 20:20:32,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39469 conditions, 4766 events. 3000/4766 cut-off events. For 449235/449237 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 27985 event pairs, 665 based on Foata normal form. 8/4771 useless extension candidates. Maximal degree in co-relation 39341. Up to 3777 conditions per place. [2024-06-03 20:20:32,258 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 203 selfloop transitions, 173 changer transitions 0/381 dead transitions. [2024-06-03 20:20:32,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 381 transitions, 6469 flow [2024-06-03 20:20:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:20:32,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:20:32,260 INFO L175 Difference]: Start difference. First operand has 260 places, 354 transitions, 5008 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:20:32,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 381 transitions, 6469 flow [2024-06-03 20:20:32,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 381 transitions, 6218 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:32,972 INFO L231 Difference]: Finished difference. Result has 266 places, 363 transitions, 5334 flow [2024-06-03 20:20:32,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4757, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5334, PETRI_PLACES=266, PETRI_TRANSITIONS=363} [2024-06-03 20:20:32,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-03 20:20:32,973 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 363 transitions, 5334 flow [2024-06-03 20:20:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:32,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:32,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:32,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:20:32,974 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:32,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1125310838, now seen corresponding path program 6 times [2024-06-03 20:20:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:32,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773751074] [2024-06-03 20:20:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:33,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773751074] [2024-06-03 20:20:33,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773751074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:33,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:33,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317768551] [2024-06-03 20:20:33,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:33,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:33,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:33,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 363 transitions, 5334 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:34,788 INFO L124 PetriNetUnfolderBase]: 3004/4770 cut-off events. [2024-06-03 20:20:34,788 INFO L125 PetriNetUnfolderBase]: For 445582/445584 co-relation queries the response was YES. [2024-06-03 20:20:34,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40042 conditions, 4770 events. 3004/4770 cut-off events. For 445582/445584 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28013 event pairs, 684 based on Foata normal form. 4/4771 useless extension candidates. Maximal degree in co-relation 39911. Up to 3788 conditions per place. [2024-06-03 20:20:34,847 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 223 selfloop transitions, 156 changer transitions 0/384 dead transitions. [2024-06-03 20:20:34,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 384 transitions, 6656 flow [2024-06-03 20:20:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 20:20:34,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 20:20:34,848 INFO L175 Difference]: Start difference. First operand has 266 places, 363 transitions, 5334 flow. Second operand 8 states and 149 transitions. [2024-06-03 20:20:34,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 384 transitions, 6656 flow [2024-06-03 20:20:35,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 384 transitions, 6395 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:35,733 INFO L231 Difference]: Finished difference. Result has 272 places, 367 transitions, 5506 flow [2024-06-03 20:20:35,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5073, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5506, PETRI_PLACES=272, PETRI_TRANSITIONS=367} [2024-06-03 20:20:35,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 20:20:35,734 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 367 transitions, 5506 flow [2024-06-03 20:20:35,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:35,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:35,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:35,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:20:35,735 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:35,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash -437615215, now seen corresponding path program 4 times [2024-06-03 20:20:35,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:35,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441005990] [2024-06-03 20:20:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:35,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:36,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:36,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441005990] [2024-06-03 20:20:36,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441005990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:36,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:36,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930077178] [2024-06-03 20:20:36,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:36,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:36,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:36,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 367 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:36,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:36,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:36,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:37,733 INFO L124 PetriNetUnfolderBase]: 2990/4750 cut-off events. [2024-06-03 20:20:37,734 INFO L125 PetriNetUnfolderBase]: For 443627/443629 co-relation queries the response was YES. [2024-06-03 20:20:37,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 4750 events. 2990/4750 cut-off events. For 443627/443629 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27860 event pairs, 673 based on Foata normal form. 2/4749 useless extension candidates. Maximal degree in co-relation 39819. Up to 3925 conditions per place. [2024-06-03 20:20:37,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 210 selfloop transitions, 167 changer transitions 0/382 dead transitions. [2024-06-03 20:20:37,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 382 transitions, 6602 flow [2024-06-03 20:20:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:20:37,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 20:20:37,797 INFO L175 Difference]: Start difference. First operand has 272 places, 367 transitions, 5506 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:20:37,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 382 transitions, 6602 flow [2024-06-03 20:20:38,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 382 transitions, 6263 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:38,745 INFO L231 Difference]: Finished difference. Result has 275 places, 367 transitions, 5508 flow [2024-06-03 20:20:38,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5508, PETRI_PLACES=275, PETRI_TRANSITIONS=367} [2024-06-03 20:20:38,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 20:20:38,745 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 367 transitions, 5508 flow [2024-06-03 20:20:38,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:38,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:38,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:20:38,746 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:38,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1828725294, now seen corresponding path program 1 times [2024-06-03 20:20:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:38,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994109197] [2024-06-03 20:20:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:38,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:39,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994109197] [2024-06-03 20:20:39,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994109197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:39,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:39,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:39,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009796532] [2024-06-03 20:20:39,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:39,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:39,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:39,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:39,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 367 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:39,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:39,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:40,401 INFO L124 PetriNetUnfolderBase]: 3000/4774 cut-off events. [2024-06-03 20:20:40,402 INFO L125 PetriNetUnfolderBase]: For 453456/453458 co-relation queries the response was YES. [2024-06-03 20:20:40,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40182 conditions, 4774 events. 3000/4774 cut-off events. For 453456/453458 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28160 event pairs, 658 based on Foata normal form. 2/4775 useless extension candidates. Maximal degree in co-relation 40048. Up to 4390 conditions per place. [2024-06-03 20:20:40,464 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 70 changer transitions 0/395 dead transitions. [2024-06-03 20:20:40,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 395 transitions, 6478 flow [2024-06-03 20:20:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:40,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:20:40,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 20:20:40,465 INFO L175 Difference]: Start difference. First operand has 275 places, 367 transitions, 5508 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:20:40,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 395 transitions, 6478 flow [2024-06-03 20:20:41,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 395 transitions, 6134 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:41,424 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5425 flow [2024-06-03 20:20:41,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5170, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5425, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2024-06-03 20:20:41,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-03 20:20:41,425 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5425 flow [2024-06-03 20:20:41,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:41,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:41,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:20:41,425 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:41,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1481487624, now seen corresponding path program 2 times [2024-06-03 20:20:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:41,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929127399] [2024-06-03 20:20:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:41,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:42,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929127399] [2024-06-03 20:20:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929127399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:42,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:42,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:42,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873568547] [2024-06-03 20:20:42,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:42,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:42,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:42,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:42,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5425 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:42,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:42,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:42,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:43,184 INFO L124 PetriNetUnfolderBase]: 3018/4788 cut-off events. [2024-06-03 20:20:43,184 INFO L125 PetriNetUnfolderBase]: For 466833/466835 co-relation queries the response was YES. [2024-06-03 20:20:43,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40378 conditions, 4788 events. 3018/4788 cut-off events. For 466833/466835 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28149 event pairs, 687 based on Foata normal form. 2/4789 useless extension candidates. Maximal degree in co-relation 40242. Up to 4394 conditions per place. [2024-06-03 20:20:43,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 76 changer transitions 0/399 dead transitions. [2024-06-03 20:20:43,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 6607 flow [2024-06-03 20:20:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:20:43,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:20:43,250 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5425 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:20:43,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 6607 flow [2024-06-03 20:20:44,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 399 transitions, 6476 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:44,012 INFO L231 Difference]: Finished difference. Result has 283 places, 377 transitions, 5644 flow [2024-06-03 20:20:44,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5644, PETRI_PLACES=283, PETRI_TRANSITIONS=377} [2024-06-03 20:20:44,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-03 20:20:44,012 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 377 transitions, 5644 flow [2024-06-03 20:20:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:44,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:44,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:20:44,013 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash -344929358, now seen corresponding path program 3 times [2024-06-03 20:20:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:44,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253794715] [2024-06-03 20:20:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:44,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:44,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:44,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253794715] [2024-06-03 20:20:44,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253794715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:44,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:44,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:44,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562214427] [2024-06-03 20:20:44,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:44,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:44,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:44,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:44,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:44,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:44,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 377 transitions, 5644 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:44,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:44,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:44,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:45,777 INFO L124 PetriNetUnfolderBase]: 3068/4865 cut-off events. [2024-06-03 20:20:45,777 INFO L125 PetriNetUnfolderBase]: For 496243/496245 co-relation queries the response was YES. [2024-06-03 20:20:45,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41779 conditions, 4865 events. 3068/4865 cut-off events. For 496243/496245 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28677 event pairs, 701 based on Foata normal form. 2/4866 useless extension candidates. Maximal degree in co-relation 41641. Up to 4410 conditions per place. [2024-06-03 20:20:45,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 93 changer transitions 0/407 dead transitions. [2024-06-03 20:20:45,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 407 transitions, 6982 flow [2024-06-03 20:20:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:20:45,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 20:20:45,837 INFO L175 Difference]: Start difference. First operand has 283 places, 377 transitions, 5644 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:20:45,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 407 transitions, 6982 flow [2024-06-03 20:20:46,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 407 transitions, 6822 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:46,698 INFO L231 Difference]: Finished difference. Result has 287 places, 389 transitions, 6066 flow [2024-06-03 20:20:46,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6066, PETRI_PLACES=287, PETRI_TRANSITIONS=389} [2024-06-03 20:20:46,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-03 20:20:46,699 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 389 transitions, 6066 flow [2024-06-03 20:20:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:46,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:46,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:46,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:20:46,699 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:46,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -148561520, now seen corresponding path program 4 times [2024-06-03 20:20:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004756929] [2024-06-03 20:20:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004756929] [2024-06-03 20:20:47,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004756929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:47,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:47,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:47,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613699548] [2024-06-03 20:20:47,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:47,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:47,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:47,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:47,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 389 transitions, 6066 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:47,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:47,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:47,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:48,531 INFO L124 PetriNetUnfolderBase]: 3078/4885 cut-off events. [2024-06-03 20:20:48,531 INFO L125 PetriNetUnfolderBase]: For 509247/509247 co-relation queries the response was YES. [2024-06-03 20:20:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42343 conditions, 4885 events. 3078/4885 cut-off events. For 509247/509247 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28848 event pairs, 673 based on Foata normal form. 2/4885 useless extension candidates. Maximal degree in co-relation 42203. Up to 4500 conditions per place. [2024-06-03 20:20:48,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 68 changer transitions 0/414 dead transitions. [2024-06-03 20:20:48,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 414 transitions, 7069 flow [2024-06-03 20:20:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:20:48,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:20:48,593 INFO L175 Difference]: Start difference. First operand has 287 places, 389 transitions, 6066 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:20:48,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 414 transitions, 7069 flow [2024-06-03 20:20:49,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 414 transitions, 6888 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:49,685 INFO L231 Difference]: Finished difference. Result has 291 places, 393 transitions, 6149 flow [2024-06-03 20:20:49,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5892, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6149, PETRI_PLACES=291, PETRI_TRANSITIONS=393} [2024-06-03 20:20:49,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-03 20:20:49,685 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 393 transitions, 6149 flow [2024-06-03 20:20:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:49,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:49,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:49,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:20:49,686 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:49,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash 759779886, now seen corresponding path program 5 times [2024-06-03 20:20:49,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:49,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927793891] [2024-06-03 20:20:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:50,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927793891] [2024-06-03 20:20:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927793891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:50,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:50,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106549284] [2024-06-03 20:20:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:50,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:50,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:50,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 393 transitions, 6149 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:50,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:50,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:50,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:51,389 INFO L124 PetriNetUnfolderBase]: 3072/4872 cut-off events. [2024-06-03 20:20:51,390 INFO L125 PetriNetUnfolderBase]: For 513991/513991 co-relation queries the response was YES. [2024-06-03 20:20:51,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42179 conditions, 4872 events. 3072/4872 cut-off events. For 513991/513991 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28725 event pairs, 676 based on Foata normal form. 2/4871 useless extension candidates. Maximal degree in co-relation 42037. Up to 4492 conditions per place. [2024-06-03 20:20:51,456 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 72 changer transitions 0/415 dead transitions. [2024-06-03 20:20:51,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 415 transitions, 7055 flow [2024-06-03 20:20:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:20:51,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:20:51,458 INFO L175 Difference]: Start difference. First operand has 291 places, 393 transitions, 6149 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:20:51,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 415 transitions, 7055 flow [2024-06-03 20:20:52,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 415 transitions, 6925 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:52,673 INFO L231 Difference]: Finished difference. Result has 295 places, 393 transitions, 6170 flow [2024-06-03 20:20:52,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6170, PETRI_PLACES=295, PETRI_TRANSITIONS=393} [2024-06-03 20:20:52,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:20:52,674 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 393 transitions, 6170 flow [2024-06-03 20:20:52,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:52,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:52,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:20:52,675 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:52,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash 34381608, now seen corresponding path program 6 times [2024-06-03 20:20:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:52,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422018901] [2024-06-03 20:20:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:53,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422018901] [2024-06-03 20:20:53,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422018901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:53,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270727514] [2024-06-03 20:20:53,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:53,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:53,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:53,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:53,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 393 transitions, 6170 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:53,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:53,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:54,504 INFO L124 PetriNetUnfolderBase]: 3066/4870 cut-off events. [2024-06-03 20:20:54,505 INFO L125 PetriNetUnfolderBase]: For 519425/519425 co-relation queries the response was YES. [2024-06-03 20:20:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42108 conditions, 4870 events. 3066/4870 cut-off events. For 519425/519425 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28742 event pairs, 674 based on Foata normal form. 2/4869 useless extension candidates. Maximal degree in co-relation 41965. Up to 4455 conditions per place. [2024-06-03 20:20:54,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 78 changer transitions 0/413 dead transitions. [2024-06-03 20:20:54,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 413 transitions, 7218 flow [2024-06-03 20:20:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:20:54,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:20:54,579 INFO L175 Difference]: Start difference. First operand has 295 places, 393 transitions, 6170 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:20:54,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 413 transitions, 7218 flow [2024-06-03 20:20:55,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 413 transitions, 7005 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-03 20:20:55,763 INFO L231 Difference]: Finished difference. Result has 294 places, 393 transitions, 6119 flow [2024-06-03 20:20:55,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6119, PETRI_PLACES=294, PETRI_TRANSITIONS=393} [2024-06-03 20:20:55,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-03 20:20:55,764 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 393 transitions, 6119 flow [2024-06-03 20:20:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:55,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:55,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:55,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:20:55,764 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:55,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash 41769528, now seen corresponding path program 7 times [2024-06-03 20:20:55,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:55,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804317603] [2024-06-03 20:20:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:55,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:56,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:56,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804317603] [2024-06-03 20:20:56,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804317603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:56,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:56,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:56,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039190388] [2024-06-03 20:20:56,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:56,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:56,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:56,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 393 transitions, 6119 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:56,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:56,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:56,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:57,757 INFO L124 PetriNetUnfolderBase]: 3050/4847 cut-off events. [2024-06-03 20:20:57,757 INFO L125 PetriNetUnfolderBase]: For 524345/524345 co-relation queries the response was YES. [2024-06-03 20:20:57,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41527 conditions, 4847 events. 3050/4847 cut-off events. For 524345/524345 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28627 event pairs, 657 based on Foata normal form. 4/4848 useless extension candidates. Maximal degree in co-relation 41386. Up to 4394 conditions per place. [2024-06-03 20:20:57,825 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 324 selfloop transitions, 84 changer transitions 0/413 dead transitions. [2024-06-03 20:20:57,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 413 transitions, 7013 flow [2024-06-03 20:20:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:20:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:20:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:20:57,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:20:57,827 INFO L175 Difference]: Start difference. First operand has 294 places, 393 transitions, 6119 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:20:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 413 transitions, 7013 flow [2024-06-03 20:20:59,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 413 transitions, 6766 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:59,017 INFO L231 Difference]: Finished difference. Result has 295 places, 393 transitions, 6048 flow [2024-06-03 20:20:59,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6048, PETRI_PLACES=295, PETRI_TRANSITIONS=393} [2024-06-03 20:20:59,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:20:59,018 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 393 transitions, 6048 flow [2024-06-03 20:20:59,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:59,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:59,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:59,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:20:59,019 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:59,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash 887451216, now seen corresponding path program 8 times [2024-06-03 20:20:59,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:59,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529265728] [2024-06-03 20:20:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:59,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:59,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529265728] [2024-06-03 20:20:59,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529265728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:59,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:59,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:20:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49246389] [2024-06-03 20:20:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:59,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:20:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:20:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:20:59,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:20:59,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 393 transitions, 6048 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:59,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:59,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:20:59,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:00,797 INFO L124 PetriNetUnfolderBase]: 3080/4893 cut-off events. [2024-06-03 20:21:00,797 INFO L125 PetriNetUnfolderBase]: For 543131/543131 co-relation queries the response was YES. [2024-06-03 20:21:00,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42059 conditions, 4893 events. 3080/4893 cut-off events. For 543131/543131 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28906 event pairs, 670 based on Foata normal form. 6/4896 useless extension candidates. Maximal degree in co-relation 41918. Up to 4149 conditions per place. [2024-06-03 20:21:00,858 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 286 selfloop transitions, 128 changer transitions 0/419 dead transitions. [2024-06-03 20:21:00,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 419 transitions, 7427 flow [2024-06-03 20:21:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:21:00,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:21:00,859 INFO L175 Difference]: Start difference. First operand has 295 places, 393 transitions, 6048 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:21:00,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 419 transitions, 7427 flow [2024-06-03 20:21:01,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 419 transitions, 7221 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:01,921 INFO L231 Difference]: Finished difference. Result has 296 places, 400 transitions, 6270 flow [2024-06-03 20:21:01,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6270, PETRI_PLACES=296, PETRI_TRANSITIONS=400} [2024-06-03 20:21:01,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 20:21:01,922 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 400 transitions, 6270 flow [2024-06-03 20:21:01,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:01,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:01,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:21:01,923 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:01,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash 887184306, now seen corresponding path program 9 times [2024-06-03 20:21:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099008440] [2024-06-03 20:21:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:02,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099008440] [2024-06-03 20:21:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099008440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:02,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:02,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:02,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272530077] [2024-06-03 20:21:02,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:02,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:02,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:02,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 400 transitions, 6270 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:02,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:02,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:02,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:03,642 INFO L124 PetriNetUnfolderBase]: 3060/4875 cut-off events. [2024-06-03 20:21:03,642 INFO L125 PetriNetUnfolderBase]: For 535534/535534 co-relation queries the response was YES. [2024-06-03 20:21:03,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41609 conditions, 4875 events. 3060/4875 cut-off events. For 535534/535534 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28889 event pairs, 650 based on Foata normal form. 6/4878 useless extension candidates. Maximal degree in co-relation 41467. Up to 4138 conditions per place. [2024-06-03 20:21:03,706 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 283 selfloop transitions, 131 changer transitions 0/419 dead transitions. [2024-06-03 20:21:03,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 419 transitions, 7496 flow [2024-06-03 20:21:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:21:03,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:21:03,707 INFO L175 Difference]: Start difference. First operand has 296 places, 400 transitions, 6270 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:21:03,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 419 transitions, 7496 flow [2024-06-03 20:21:04,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 419 transitions, 7199 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:04,786 INFO L231 Difference]: Finished difference. Result has 299 places, 400 transitions, 6246 flow [2024-06-03 20:21:04,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5973, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=299, PETRI_TRANSITIONS=400} [2024-06-03 20:21:04,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 20:21:04,787 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 400 transitions, 6246 flow [2024-06-03 20:21:04,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:04,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:04,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:04,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:21:04,787 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:04,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -688109374, now seen corresponding path program 10 times [2024-06-03 20:21:04,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:04,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723347244] [2024-06-03 20:21:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:04,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:05,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:05,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723347244] [2024-06-03 20:21:05,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723347244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:05,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:05,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625796646] [2024-06-03 20:21:05,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:05,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:05,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:05,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:05,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 400 transitions, 6246 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:05,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:05,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:05,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:06,483 INFO L124 PetriNetUnfolderBase]: 3090/4915 cut-off events. [2024-06-03 20:21:06,483 INFO L125 PetriNetUnfolderBase]: For 548111/548113 co-relation queries the response was YES. [2024-06-03 20:21:06,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41947 conditions, 4915 events. 3090/4915 cut-off events. For 548111/548113 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29144 event pairs, 688 based on Foata normal form. 6/4918 useless extension candidates. Maximal degree in co-relation 41804. Up to 3849 conditions per place. [2024-06-03 20:21:06,559 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 187 changer transitions 0/424 dead transitions. [2024-06-03 20:21:06,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 424 transitions, 7760 flow [2024-06-03 20:21:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:21:06,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:21:06,560 INFO L175 Difference]: Start difference. First operand has 299 places, 400 transitions, 6246 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:21:06,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 424 transitions, 7760 flow [2024-06-03 20:21:07,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 424 transitions, 7265 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-03 20:21:07,681 INFO L231 Difference]: Finished difference. Result has 297 places, 407 transitions, 6262 flow [2024-06-03 20:21:07,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6262, PETRI_PLACES=297, PETRI_TRANSITIONS=407} [2024-06-03 20:21:07,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-03 20:21:07,682 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 407 transitions, 6262 flow [2024-06-03 20:21:07,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:07,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:07,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:07,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:21:07,682 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:07,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1490235214, now seen corresponding path program 11 times [2024-06-03 20:21:07,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:07,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133607603] [2024-06-03 20:21:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:08,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:08,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133607603] [2024-06-03 20:21:08,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133607603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:08,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:08,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:08,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633035303] [2024-06-03 20:21:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:08,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:08,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:08,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 407 transitions, 6262 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:08,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:08,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:08,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:09,450 INFO L124 PetriNetUnfolderBase]: 3148/4996 cut-off events. [2024-06-03 20:21:09,451 INFO L125 PetriNetUnfolderBase]: For 570635/570637 co-relation queries the response was YES. [2024-06-03 20:21:09,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42994 conditions, 4996 events. 3148/4996 cut-off events. For 570635/570637 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29560 event pairs, 704 based on Foata normal form. 6/4999 useless extension candidates. Maximal degree in co-relation 42852. Up to 3897 conditions per place. [2024-06-03 20:21:09,520 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 239 selfloop transitions, 191 changer transitions 0/435 dead transitions. [2024-06-03 20:21:09,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 435 transitions, 7901 flow [2024-06-03 20:21:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:21:09,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:21:09,521 INFO L175 Difference]: Start difference. First operand has 297 places, 407 transitions, 6262 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:21:09,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 435 transitions, 7901 flow [2024-06-03 20:21:11,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 435 transitions, 7520 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:11,340 INFO L231 Difference]: Finished difference. Result has 301 places, 418 transitions, 6523 flow [2024-06-03 20:21:11,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6523, PETRI_PLACES=301, PETRI_TRANSITIONS=418} [2024-06-03 20:21:11,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-03 20:21:11,341 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 418 transitions, 6523 flow [2024-06-03 20:21:11,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:11,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:11,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:11,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:21:11,341 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:11,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1731803600, now seen corresponding path program 12 times [2024-06-03 20:21:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613953708] [2024-06-03 20:21:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:12,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:12,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613953708] [2024-06-03 20:21:12,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613953708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:12,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:12,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:12,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289131958] [2024-06-03 20:21:12,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:12,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:12,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:12,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:12,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:12,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:12,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 418 transitions, 6523 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:12,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:12,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:12,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:13,633 INFO L124 PetriNetUnfolderBase]: 3126/4967 cut-off events. [2024-06-03 20:21:13,634 INFO L125 PetriNetUnfolderBase]: For 561399/561401 co-relation queries the response was YES. [2024-06-03 20:21:13,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42439 conditions, 4967 events. 3126/4967 cut-off events. For 561399/561401 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29409 event pairs, 688 based on Foata normal form. 6/4970 useless extension candidates. Maximal degree in co-relation 42295. Up to 3883 conditions per place. [2024-06-03 20:21:13,733 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 221 selfloop transitions, 209 changer transitions 0/435 dead transitions. [2024-06-03 20:21:13,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 435 transitions, 7951 flow [2024-06-03 20:21:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:21:13,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:21:13,735 INFO L175 Difference]: Start difference. First operand has 301 places, 418 transitions, 6523 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:21:13,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 435 transitions, 7951 flow [2024-06-03 20:21:15,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 435 transitions, 7573 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:15,760 INFO L231 Difference]: Finished difference. Result has 305 places, 418 transitions, 6574 flow [2024-06-03 20:21:15,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6574, PETRI_PLACES=305, PETRI_TRANSITIONS=418} [2024-06-03 20:21:15,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-03 20:21:15,761 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 418 transitions, 6574 flow [2024-06-03 20:21:15,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:15,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:15,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:15,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:21:15,761 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:15,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash 746738974, now seen corresponding path program 1 times [2024-06-03 20:21:15,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:15,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423467215] [2024-06-03 20:21:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:15,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:15,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:16,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423467215] [2024-06-03 20:21:16,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423467215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:16,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210996454] [2024-06-03 20:21:16,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:16,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:16,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:17,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:17,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 418 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:17,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:17,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:18,175 INFO L124 PetriNetUnfolderBase]: 3006/4832 cut-off events. [2024-06-03 20:21:18,175 INFO L125 PetriNetUnfolderBase]: For 601725/601730 co-relation queries the response was YES. [2024-06-03 20:21:18,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 4832 events. 3006/4832 cut-off events. For 601725/601730 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29028 event pairs, 646 based on Foata normal form. 15/4815 useless extension candidates. Maximal degree in co-relation 41166. Up to 4184 conditions per place. [2024-06-03 20:21:18,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 50 changer transitions 0/437 dead transitions. [2024-06-03 20:21:18,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 437 transitions, 7408 flow [2024-06-03 20:21:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:21:18,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 20:21:18,243 INFO L175 Difference]: Start difference. First operand has 305 places, 418 transitions, 6574 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:21:18,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 437 transitions, 7408 flow [2024-06-03 20:21:19,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 437 transitions, 6664 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 20:21:19,529 INFO L231 Difference]: Finished difference. Result has 303 places, 420 transitions, 5987 flow [2024-06-03 20:21:19,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5987, PETRI_PLACES=303, PETRI_TRANSITIONS=420} [2024-06-03 20:21:19,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 20:21:19,530 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 420 transitions, 5987 flow [2024-06-03 20:21:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:19,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:19,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:21:19,531 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:19,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:19,531 INFO L85 PathProgramCache]: Analyzing trace with hash -451190200, now seen corresponding path program 2 times [2024-06-03 20:21:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:19,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267883364] [2024-06-03 20:21:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:20,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267883364] [2024-06-03 20:21:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267883364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:20,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:20,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:21:20,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683319027] [2024-06-03 20:21:20,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:20,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:21:20,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:20,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:21:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:21:20,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:20,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 420 transitions, 5987 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:20,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:20,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:20,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:21,923 INFO L124 PetriNetUnfolderBase]: 3067/4929 cut-off events. [2024-06-03 20:21:21,923 INFO L125 PetriNetUnfolderBase]: For 607977/607982 co-relation queries the response was YES. [2024-06-03 20:21:21,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41827 conditions, 4929 events. 3067/4929 cut-off events. For 607977/607982 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29646 event pairs, 661 based on Foata normal form. 9/4909 useless extension candidates. Maximal degree in co-relation 41683. Up to 4146 conditions per place. [2024-06-03 20:21:22,021 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 48 changer transitions 0/443 dead transitions. [2024-06-03 20:21:22,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 443 transitions, 7053 flow [2024-06-03 20:21:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:21:22,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 20:21:22,023 INFO L175 Difference]: Start difference. First operand has 303 places, 420 transitions, 5987 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:21:22,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 443 transitions, 7053 flow [2024-06-03 20:21:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 443 transitions, 6934 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:23,691 INFO L231 Difference]: Finished difference. Result has 304 places, 422 transitions, 6010 flow [2024-06-03 20:21:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=304, PETRI_TRANSITIONS=422} [2024-06-03 20:21:23,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:21:23,692 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 422 transitions, 6010 flow [2024-06-03 20:21:23,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:23,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:23,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:21:23,692 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:23,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash 769313006, now seen corresponding path program 1 times [2024-06-03 20:21:23,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944075968] [2024-06-03 20:21:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:24,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944075968] [2024-06-03 20:21:24,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944075968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:24,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:24,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:24,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503076821] [2024-06-03 20:21:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:24,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:24,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:24,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:24,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 422 transitions, 6010 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:24,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:24,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:24,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:25,923 INFO L124 PetriNetUnfolderBase]: 3247/5160 cut-off events. [2024-06-03 20:21:25,924 INFO L125 PetriNetUnfolderBase]: For 601100/601100 co-relation queries the response was YES. [2024-06-03 20:21:25,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43774 conditions, 5160 events. 3247/5160 cut-off events. For 601100/601100 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30780 event pairs, 844 based on Foata normal form. 2/5161 useless extension candidates. Maximal degree in co-relation 43629. Up to 4894 conditions per place. [2024-06-03 20:21:26,006 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 18 changer transitions 0/445 dead transitions. [2024-06-03 20:21:26,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 445 transitions, 7034 flow [2024-06-03 20:21:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:21:26,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:21:26,008 INFO L175 Difference]: Start difference. First operand has 304 places, 422 transitions, 6010 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:21:26,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 445 transitions, 7034 flow [2024-06-03 20:21:27,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 445 transitions, 6971 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:27,378 INFO L231 Difference]: Finished difference. Result has 308 places, 424 transitions, 6060 flow [2024-06-03 20:21:27,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=308, PETRI_TRANSITIONS=424} [2024-06-03 20:21:27,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 20:21:27,379 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 424 transitions, 6060 flow [2024-06-03 20:21:27,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:27,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:27,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:27,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:21:27,379 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:27,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash 769373580, now seen corresponding path program 1 times [2024-06-03 20:21:27,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:27,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120354521] [2024-06-03 20:21:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:27,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120354521] [2024-06-03 20:21:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120354521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:28,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:28,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:28,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587131940] [2024-06-03 20:21:28,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:28,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:28,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:28,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 424 transitions, 6060 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:28,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:28,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:28,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:29,591 INFO L124 PetriNetUnfolderBase]: 3241/5137 cut-off events. [2024-06-03 20:21:29,592 INFO L125 PetriNetUnfolderBase]: For 604948/604948 co-relation queries the response was YES. [2024-06-03 20:21:29,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 5137 events. 3241/5137 cut-off events. For 604948/604948 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 30481 event pairs, 674 based on Foata normal form. 2/5136 useless extension candidates. Maximal degree in co-relation 43592. Up to 4639 conditions per place. [2024-06-03 20:21:29,658 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 99 changer transitions 0/445 dead transitions. [2024-06-03 20:21:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 445 transitions, 7200 flow [2024-06-03 20:21:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:21:29,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:21:29,659 INFO L175 Difference]: Start difference. First operand has 308 places, 424 transitions, 6060 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:21:29,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 445 transitions, 7200 flow [2024-06-03 20:21:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 445 transitions, 7069 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:30,997 INFO L231 Difference]: Finished difference. Result has 310 places, 424 transitions, 6146 flow [2024-06-03 20:21:30,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6146, PETRI_PLACES=310, PETRI_TRANSITIONS=424} [2024-06-03 20:21:30,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-03 20:21:30,998 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 424 transitions, 6146 flow [2024-06-03 20:21:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:30,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:30,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:21:30,998 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:30,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -636809832, now seen corresponding path program 2 times [2024-06-03 20:21:30,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:30,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588110471] [2024-06-03 20:21:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588110471] [2024-06-03 20:21:31,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588110471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:31,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:31,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:31,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140582704] [2024-06-03 20:21:31,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:31,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:32,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:32,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 424 transitions, 6146 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:32,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:32,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:32,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:33,253 INFO L124 PetriNetUnfolderBase]: 3249/5165 cut-off events. [2024-06-03 20:21:33,253 INFO L125 PetriNetUnfolderBase]: For 621684/621684 co-relation queries the response was YES. [2024-06-03 20:21:33,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44203 conditions, 5165 events. 3249/5165 cut-off events. For 621684/621684 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30800 event pairs, 856 based on Foata normal form. 2/5166 useless extension candidates. Maximal degree in co-relation 44055. Up to 4907 conditions per place. [2024-06-03 20:21:33,317 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 417 selfloop transitions, 22 changer transitions 0/444 dead transitions. [2024-06-03 20:21:33,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 444 transitions, 7160 flow [2024-06-03 20:21:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:21:33,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:21:33,319 INFO L175 Difference]: Start difference. First operand has 310 places, 424 transitions, 6146 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:21:33,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 444 transitions, 7160 flow [2024-06-03 20:21:34,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 444 transitions, 6956 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:34,967 INFO L231 Difference]: Finished difference. Result has 312 places, 426 transitions, 6068 flow [2024-06-03 20:21:34,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6068, PETRI_PLACES=312, PETRI_TRANSITIONS=426} [2024-06-03 20:21:34,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:21:34,968 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 426 transitions, 6068 flow [2024-06-03 20:21:34,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:34,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:34,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:21:34,969 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:34,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 887461136, now seen corresponding path program 3 times [2024-06-03 20:21:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800879299] [2024-06-03 20:21:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:34,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:35,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:35,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800879299] [2024-06-03 20:21:35,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800879299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:35,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:35,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977728935] [2024-06-03 20:21:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:36,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:36,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 426 transitions, 6068 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:36,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:36,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:36,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:37,127 INFO L124 PetriNetUnfolderBase]: 3257/5172 cut-off events. [2024-06-03 20:21:37,128 INFO L125 PetriNetUnfolderBase]: For 634696/634696 co-relation queries the response was YES. [2024-06-03 20:21:37,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44301 conditions, 5172 events. 3257/5172 cut-off events. For 634696/634696 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30805 event pairs, 862 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 44152. Up to 4912 conditions per place. [2024-06-03 20:21:37,203 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 27 changer transitions 0/444 dead transitions. [2024-06-03 20:21:37,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 444 transitions, 7076 flow [2024-06-03 20:21:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:21:37,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:21:37,204 INFO L175 Difference]: Start difference. First operand has 312 places, 426 transitions, 6068 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:21:37,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 444 transitions, 7076 flow [2024-06-03 20:21:38,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 444 transitions, 6968 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:38,972 INFO L231 Difference]: Finished difference. Result has 314 places, 428 transitions, 6099 flow [2024-06-03 20:21:38,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6099, PETRI_PLACES=314, PETRI_TRANSITIONS=428} [2024-06-03 20:21:38,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 20:21:38,973 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 428 transitions, 6099 flow [2024-06-03 20:21:38,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:38,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:38,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:38,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:21:38,974 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:38,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash 887645834, now seen corresponding path program 1 times [2024-06-03 20:21:38,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:38,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163954801] [2024-06-03 20:21:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:38,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:39,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:39,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163954801] [2024-06-03 20:21:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163954801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:39,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:39,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:39,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173120916] [2024-06-03 20:21:39,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:40,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:40,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 428 transitions, 6099 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:40,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:40,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:40,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:41,107 INFO L124 PetriNetUnfolderBase]: 3273/5189 cut-off events. [2024-06-03 20:21:41,107 INFO L125 PetriNetUnfolderBase]: For 656079/656079 co-relation queries the response was YES. [2024-06-03 20:21:41,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44715 conditions, 5189 events. 3273/5189 cut-off events. For 656079/656079 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30896 event pairs, 679 based on Foata normal form. 4/5191 useless extension candidates. Maximal degree in co-relation 44565. Up to 4878 conditions per place. [2024-06-03 20:21:41,178 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 49 changer transitions 0/451 dead transitions. [2024-06-03 20:21:41,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 451 transitions, 7183 flow [2024-06-03 20:21:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:21:41,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 20:21:41,179 INFO L175 Difference]: Start difference. First operand has 314 places, 428 transitions, 6099 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:21:41,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 451 transitions, 7183 flow [2024-06-03 20:21:42,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 451 transitions, 7060 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:42,962 INFO L231 Difference]: Finished difference. Result has 318 places, 434 transitions, 6229 flow [2024-06-03 20:21:42,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5976, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6229, PETRI_PLACES=318, PETRI_TRANSITIONS=434} [2024-06-03 20:21:42,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 20:21:42,963 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 434 transitions, 6229 flow [2024-06-03 20:21:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:42,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:42,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:21:42,964 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:42,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash 531334668, now seen corresponding path program 2 times [2024-06-03 20:21:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:42,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101139344] [2024-06-03 20:21:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:43,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:43,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101139344] [2024-06-03 20:21:43,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101139344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:43,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:43,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:43,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524457949] [2024-06-03 20:21:43,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:43,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:43,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:43,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:43,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 434 transitions, 6229 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:43,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:43,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:43,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:45,039 INFO L124 PetriNetUnfolderBase]: 3361/5324 cut-off events. [2024-06-03 20:21:45,040 INFO L125 PetriNetUnfolderBase]: For 767819/767821 co-relation queries the response was YES. [2024-06-03 20:21:45,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46294 conditions, 5324 events. 3361/5324 cut-off events. For 767819/767821 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 31687 event pairs, 712 based on Foata normal form. 24/5345 useless extension candidates. Maximal degree in co-relation 46142. Up to 4414 conditions per place. [2024-06-03 20:21:45,120 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 264 selfloop transitions, 189 changer transitions 0/458 dead transitions. [2024-06-03 20:21:45,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 458 transitions, 7511 flow [2024-06-03 20:21:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:21:45,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 20:21:45,121 INFO L175 Difference]: Start difference. First operand has 318 places, 434 transitions, 6229 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:21:45,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 458 transitions, 7511 flow [2024-06-03 20:21:47,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 458 transitions, 7334 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:47,102 INFO L231 Difference]: Finished difference. Result has 321 places, 437 transitions, 6543 flow [2024-06-03 20:21:47,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6052, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6543, PETRI_PLACES=321, PETRI_TRANSITIONS=437} [2024-06-03 20:21:47,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-03 20:21:47,103 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 437 transitions, 6543 flow [2024-06-03 20:21:47,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:47,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:47,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:47,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:21:47,103 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:47,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash -451479926, now seen corresponding path program 3 times [2024-06-03 20:21:47,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:47,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102201679] [2024-06-03 20:21:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:47,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:48,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:48,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102201679] [2024-06-03 20:21:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102201679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:48,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:48,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534595896] [2024-06-03 20:21:48,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:48,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:48,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:48,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 437 transitions, 6543 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:48,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:48,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:48,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:49,376 INFO L124 PetriNetUnfolderBase]: 3377/5350 cut-off events. [2024-06-03 20:21:49,376 INFO L125 PetriNetUnfolderBase]: For 696696/696700 co-relation queries the response was YES. [2024-06-03 20:21:49,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47312 conditions, 5350 events. 3377/5350 cut-off events. For 696696/696700 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 31958 event pairs, 709 based on Foata normal form. 8/5355 useless extension candidates. Maximal degree in co-relation 47159. Up to 4944 conditions per place. [2024-06-03 20:21:49,453 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 361 selfloop transitions, 96 changer transitions 0/462 dead transitions. [2024-06-03 20:21:49,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 462 transitions, 7747 flow [2024-06-03 20:21:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:21:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:21:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-03 20:21:49,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-03 20:21:49,455 INFO L175 Difference]: Start difference. First operand has 321 places, 437 transitions, 6543 flow. Second operand 10 states and 163 transitions. [2024-06-03 20:21:49,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 462 transitions, 7747 flow [2024-06-03 20:21:51,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 462 transitions, 7249 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:51,670 INFO L231 Difference]: Finished difference. Result has 326 places, 448 transitions, 6542 flow [2024-06-03 20:21:51,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6542, PETRI_PLACES=326, PETRI_TRANSITIONS=448} [2024-06-03 20:21:51,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-03 20:21:51,671 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 448 transitions, 6542 flow [2024-06-03 20:21:51,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:51,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:51,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:51,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:21:51,671 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:51,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash -451183256, now seen corresponding path program 4 times [2024-06-03 20:21:51,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:51,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262031039] [2024-06-03 20:21:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:52,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262031039] [2024-06-03 20:21:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262031039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:52,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473354813] [2024-06-03 20:21:52,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:52,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 448 transitions, 6542 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:52,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:52,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:52,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:53,968 INFO L124 PetriNetUnfolderBase]: 3406/5409 cut-off events. [2024-06-03 20:21:53,968 INFO L125 PetriNetUnfolderBase]: For 715298/715302 co-relation queries the response was YES. [2024-06-03 20:21:54,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 5409 events. 3406/5409 cut-off events. For 715298/715302 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32456 event pairs, 698 based on Foata normal form. 8/5414 useless extension candidates. Maximal degree in co-relation 47287. Up to 4929 conditions per place. [2024-06-03 20:21:54,044 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 105 changer transitions 0/470 dead transitions. [2024-06-03 20:21:54,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 470 transitions, 7944 flow [2024-06-03 20:21:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:21:54,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 20:21:54,045 INFO L175 Difference]: Start difference. First operand has 326 places, 448 transitions, 6542 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:21:54,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 470 transitions, 7944 flow [2024-06-03 20:21:56,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 470 transitions, 7549 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-03 20:21:56,090 INFO L231 Difference]: Finished difference. Result has 328 places, 455 transitions, 6626 flow [2024-06-03 20:21:56,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6626, PETRI_PLACES=328, PETRI_TRANSITIONS=455} [2024-06-03 20:21:56,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 20:21:56,098 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 455 transitions, 6626 flow [2024-06-03 20:21:56,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:56,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:56,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:21:56,098 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:56,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash -687839984, now seen corresponding path program 4 times [2024-06-03 20:21:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70483143] [2024-06-03 20:21:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:57,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:57,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70483143] [2024-06-03 20:21:57,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70483143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:57,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:57,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:57,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594733006] [2024-06-03 20:21:57,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:57,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:57,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:57,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:57,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:21:57,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 455 transitions, 6626 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:57,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:57,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:21:57,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:58,312 INFO L124 PetriNetUnfolderBase]: 3401/5394 cut-off events. [2024-06-03 20:21:58,312 INFO L125 PetriNetUnfolderBase]: For 711335/711337 co-relation queries the response was YES. [2024-06-03 20:21:58,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47194 conditions, 5394 events. 3401/5394 cut-off events. For 711335/711337 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32376 event pairs, 892 based on Foata normal form. 2/5395 useless extension candidates. Maximal degree in co-relation 47036. Up to 5120 conditions per place. [2024-06-03 20:21:58,390 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 431 selfloop transitions, 34 changer transitions 0/470 dead transitions. [2024-06-03 20:21:58,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 470 transitions, 7684 flow [2024-06-03 20:21:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:21:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:21:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 20:21:58,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 20:21:58,391 INFO L175 Difference]: Start difference. First operand has 328 places, 455 transitions, 6626 flow. Second operand 8 states and 132 transitions. [2024-06-03 20:21:58,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 470 transitions, 7684 flow [2024-06-03 20:22:00,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 470 transitions, 7429 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-03 20:22:00,092 INFO L231 Difference]: Finished difference. Result has 331 places, 457 transitions, 6536 flow [2024-06-03 20:22:00,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6536, PETRI_PLACES=331, PETRI_TRANSITIONS=457} [2024-06-03 20:22:00,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-03 20:22:00,095 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 457 transitions, 6536 flow [2024-06-03 20:22:00,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:00,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:00,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:00,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:22:00,102 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:00,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash -687655286, now seen corresponding path program 5 times [2024-06-03 20:22:00,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:00,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580803624] [2024-06-03 20:22:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:00,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:01,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580803624] [2024-06-03 20:22:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580803624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:01,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:01,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:01,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043943354] [2024-06-03 20:22:01,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:01,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:01,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:01,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 457 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:01,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:01,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:01,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:02,389 INFO L124 PetriNetUnfolderBase]: 3391/5375 cut-off events. [2024-06-03 20:22:02,389 INFO L125 PetriNetUnfolderBase]: For 710498/710502 co-relation queries the response was YES. [2024-06-03 20:22:02,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46508 conditions, 5375 events. 3391/5375 cut-off events. For 710498/710502 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32180 event pairs, 711 based on Foata normal form. 8/5380 useless extension candidates. Maximal degree in co-relation 46348. Up to 5002 conditions per place. [2024-06-03 20:22:02,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 396 selfloop transitions, 70 changer transitions 0/471 dead transitions. [2024-06-03 20:22:02,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 471 transitions, 7523 flow [2024-06-03 20:22:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:22:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:22:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:22:02,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 20:22:02,466 INFO L175 Difference]: Start difference. First operand has 331 places, 457 transitions, 6536 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:22:02,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 471 transitions, 7523 flow [2024-06-03 20:22:04,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 471 transitions, 7306 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:04,799 INFO L231 Difference]: Finished difference. Result has 334 places, 458 transitions, 6482 flow [2024-06-03 20:22:04,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6482, PETRI_PLACES=334, PETRI_TRANSITIONS=458} [2024-06-03 20:22:04,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-03 20:22:04,800 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 458 transitions, 6482 flow [2024-06-03 20:22:04,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:04,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:04,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:04,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:22:04,800 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:04,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 607074186, now seen corresponding path program 1 times [2024-06-03 20:22:04,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:04,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983570120] [2024-06-03 20:22:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983570120] [2024-06-03 20:22:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983570120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:05,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:05,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849291708] [2024-06-03 20:22:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:05,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:05,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:05,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:05,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 458 transitions, 6482 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:05,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:05,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:05,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:06,939 INFO L124 PetriNetUnfolderBase]: 3396/5394 cut-off events. [2024-06-03 20:22:06,939 INFO L125 PetriNetUnfolderBase]: For 706392/706392 co-relation queries the response was YES. [2024-06-03 20:22:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46552 conditions, 5394 events. 3396/5394 cut-off events. For 706392/706392 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32387 event pairs, 691 based on Foata normal form. 1/5394 useless extension candidates. Maximal degree in co-relation 46391. Up to 5103 conditions per place. [2024-06-03 20:22:07,011 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 30 changer transitions 0/486 dead transitions. [2024-06-03 20:22:07,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 486 transitions, 7625 flow [2024-06-03 20:22:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:22:07,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:22:07,012 INFO L175 Difference]: Start difference. First operand has 334 places, 458 transitions, 6482 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:22:07,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 486 transitions, 7625 flow [2024-06-03 20:22:08,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 486 transitions, 7474 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:08,868 INFO L231 Difference]: Finished difference. Result has 336 places, 461 transitions, 6491 flow [2024-06-03 20:22:08,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6491, PETRI_PLACES=336, PETRI_TRANSITIONS=461} [2024-06-03 20:22:08,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-03 20:22:08,869 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 461 transitions, 6491 flow [2024-06-03 20:22:08,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:08,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:08,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:22:08,870 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:08,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:08,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1733717548, now seen corresponding path program 2 times [2024-06-03 20:22:08,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:08,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731642335] [2024-06-03 20:22:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:09,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:09,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731642335] [2024-06-03 20:22:09,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731642335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:09,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:09,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533305575] [2024-06-03 20:22:09,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:09,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:09,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 461 transitions, 6491 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:09,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:09,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:09,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:10,722 INFO L124 PetriNetUnfolderBase]: 3406/5408 cut-off events. [2024-06-03 20:22:10,722 INFO L125 PetriNetUnfolderBase]: For 720515/720515 co-relation queries the response was YES. [2024-06-03 20:22:10,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46986 conditions, 5408 events. 3406/5408 cut-off events. For 720515/720515 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 32430 event pairs, 691 based on Foata normal form. 1/5408 useless extension candidates. Maximal degree in co-relation 46824. Up to 5109 conditions per place. [2024-06-03 20:22:10,797 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 452 selfloop transitions, 36 changer transitions 0/493 dead transitions. [2024-06-03 20:22:10,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 493 transitions, 7683 flow [2024-06-03 20:22:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:22:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:22:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:22:10,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 20:22:10,798 INFO L175 Difference]: Start difference. First operand has 336 places, 461 transitions, 6491 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:22:10,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 493 transitions, 7683 flow [2024-06-03 20:22:12,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 493 transitions, 7549 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:12,678 INFO L231 Difference]: Finished difference. Result has 340 places, 467 transitions, 6577 flow [2024-06-03 20:22:12,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6357, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6577, PETRI_PLACES=340, PETRI_TRANSITIONS=467} [2024-06-03 20:22:12,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 20:22:12,679 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 467 transitions, 6577 flow [2024-06-03 20:22:12,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:12,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:12,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:12,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:22:12,679 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:12,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1308042472, now seen corresponding path program 3 times [2024-06-03 20:22:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:12,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573012832] [2024-06-03 20:22:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:12,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:13,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573012832] [2024-06-03 20:22:13,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573012832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:13,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:13,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:13,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572117544] [2024-06-03 20:22:13,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:13,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:13,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:13,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:13,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:13,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 467 transitions, 6577 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:13,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:13,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:13,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:14,488 INFO L124 PetriNetUnfolderBase]: 3411/5416 cut-off events. [2024-06-03 20:22:14,488 INFO L125 PetriNetUnfolderBase]: For 734245/734249 co-relation queries the response was YES. [2024-06-03 20:22:14,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 5416 events. 3411/5416 cut-off events. For 734245/734249 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32525 event pairs, 688 based on Foata normal form. 5/5420 useless extension candidates. Maximal degree in co-relation 47330. Up to 5059 conditions per place. [2024-06-03 20:22:14,572 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 443 selfloop transitions, 46 changer transitions 0/494 dead transitions. [2024-06-03 20:22:14,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 494 transitions, 7748 flow [2024-06-03 20:22:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:22:14,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:22:14,574 INFO L175 Difference]: Start difference. First operand has 340 places, 467 transitions, 6577 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:22:14,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 494 transitions, 7748 flow [2024-06-03 20:22:17,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 494 transitions, 7601 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:17,099 INFO L231 Difference]: Finished difference. Result has 342 places, 470 transitions, 6632 flow [2024-06-03 20:22:17,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6632, PETRI_PLACES=342, PETRI_TRANSITIONS=470} [2024-06-03 20:22:17,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-03 20:22:17,100 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 470 transitions, 6632 flow [2024-06-03 20:22:17,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:17,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:17,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:17,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:22:17,101 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:17,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -251480688, now seen corresponding path program 4 times [2024-06-03 20:22:17,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:17,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240624299] [2024-06-03 20:22:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:17,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240624299] [2024-06-03 20:22:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240624299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:17,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:17,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:17,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110652949] [2024-06-03 20:22:17,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:17,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:17,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:17,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:17,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 470 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:17,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:17,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:17,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:18,910 INFO L124 PetriNetUnfolderBase]: 3416/5423 cut-off events. [2024-06-03 20:22:18,911 INFO L125 PetriNetUnfolderBase]: For 751819/751823 co-relation queries the response was YES. [2024-06-03 20:22:18,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48021 conditions, 5423 events. 3416/5423 cut-off events. For 751819/751823 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32570 event pairs, 684 based on Foata normal form. 5/5427 useless extension candidates. Maximal degree in co-relation 47856. Up to 5049 conditions per place. [2024-06-03 20:22:18,987 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 437 selfloop transitions, 52 changer transitions 0/494 dead transitions. [2024-06-03 20:22:18,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 494 transitions, 7795 flow [2024-06-03 20:22:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:22:18,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:22:18,988 INFO L175 Difference]: Start difference. First operand has 342 places, 470 transitions, 6632 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:22:18,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 494 transitions, 7795 flow [2024-06-03 20:22:21,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 494 transitions, 7615 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:21,342 INFO L231 Difference]: Finished difference. Result has 344 places, 473 transitions, 6672 flow [2024-06-03 20:22:21,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6452, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6672, PETRI_PLACES=344, PETRI_TRANSITIONS=473} [2024-06-03 20:22:21,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 20:22:21,343 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 473 transitions, 6672 flow [2024-06-03 20:22:21,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:21,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:21,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:21,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:22:21,343 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:21,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash 657300112, now seen corresponding path program 5 times [2024-06-03 20:22:21,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:21,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494063321] [2024-06-03 20:22:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:21,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494063321] [2024-06-03 20:22:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494063321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:22,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:22,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:22,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362943793] [2024-06-03 20:22:22,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:22,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:22,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:22,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:22,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 473 transitions, 6672 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:22,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:22,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:22,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:23,220 INFO L124 PetriNetUnfolderBase]: 3421/5431 cut-off events. [2024-06-03 20:22:23,221 INFO L125 PetriNetUnfolderBase]: For 767196/767196 co-relation queries the response was YES. [2024-06-03 20:22:23,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48499 conditions, 5431 events. 3421/5431 cut-off events. For 767196/767196 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32619 event pairs, 694 based on Foata normal form. 1/5431 useless extension candidates. Maximal degree in co-relation 48333. Up to 5149 conditions per place. [2024-06-03 20:22:23,295 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 28 changer transitions 0/492 dead transitions. [2024-06-03 20:22:23,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 492 transitions, 7812 flow [2024-06-03 20:22:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:22:23,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:22:23,296 INFO L175 Difference]: Start difference. First operand has 344 places, 473 transitions, 6672 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:22:23,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 492 transitions, 7812 flow [2024-06-03 20:22:25,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 492 transitions, 7614 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:25,726 INFO L231 Difference]: Finished difference. Result has 346 places, 476 transitions, 6652 flow [2024-06-03 20:22:25,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6652, PETRI_PLACES=346, PETRI_TRANSITIONS=476} [2024-06-03 20:22:25,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-03 20:22:25,726 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 476 transitions, 6652 flow [2024-06-03 20:22:25,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:25,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:25,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:25,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:22:25,727 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:25,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 662061712, now seen corresponding path program 6 times [2024-06-03 20:22:25,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:25,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359921070] [2024-06-03 20:22:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:25,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:26,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:26,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359921070] [2024-06-03 20:22:26,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359921070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:26,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:26,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:26,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624989162] [2024-06-03 20:22:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:26,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:26,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 476 transitions, 6652 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:26,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:26,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:26,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:27,672 INFO L124 PetriNetUnfolderBase]: 3434/5451 cut-off events. [2024-06-03 20:22:27,672 INFO L125 PetriNetUnfolderBase]: For 789466/789470 co-relation queries the response was YES. [2024-06-03 20:22:27,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49170 conditions, 5451 events. 3434/5451 cut-off events. For 789466/789470 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32760 event pairs, 688 based on Foata normal form. 5/5455 useless extension candidates. Maximal degree in co-relation 49003. Up to 5038 conditions per place. [2024-06-03 20:22:27,745 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 423 selfloop transitions, 72 changer transitions 0/500 dead transitions. [2024-06-03 20:22:27,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 500 transitions, 8145 flow [2024-06-03 20:22:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:22:27,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:22:27,746 INFO L175 Difference]: Start difference. First operand has 346 places, 476 transitions, 6652 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:22:27,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 500 transitions, 8145 flow [2024-06-03 20:22:30,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 500 transitions, 7968 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:30,218 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 6863 flow [2024-06-03 20:22:30,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6863, PETRI_PLACES=348, PETRI_TRANSITIONS=482} [2024-06-03 20:22:30,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 20:22:30,219 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 6863 flow [2024-06-03 20:22:30,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:30,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:30,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:30,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:22:30,219 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:30,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash -20166328, now seen corresponding path program 1 times [2024-06-03 20:22:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072706460] [2024-06-03 20:22:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:30,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:30,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072706460] [2024-06-03 20:22:30,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072706460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:30,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:30,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:30,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130223821] [2024-06-03 20:22:30,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:30,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:30,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:30,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:30,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 482 transitions, 6863 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:30,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:30,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:30,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:32,245 INFO L124 PetriNetUnfolderBase]: 3486/5538 cut-off events. [2024-06-03 20:22:32,245 INFO L125 PetriNetUnfolderBase]: For 813470/813470 co-relation queries the response was YES. [2024-06-03 20:22:32,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50229 conditions, 5538 events. 3486/5538 cut-off events. For 813470/813470 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33391 event pairs, 693 based on Foata normal form. 2/5537 useless extension candidates. Maximal degree in co-relation 50062. Up to 5218 conditions per place. [2024-06-03 20:22:32,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 33 changer transitions 0/520 dead transitions. [2024-06-03 20:22:32,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 520 transitions, 8210 flow [2024-06-03 20:22:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:22:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:22:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 20:22:32,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-03 20:22:32,316 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 6863 flow. Second operand 9 states and 151 transitions. [2024-06-03 20:22:32,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 520 transitions, 8210 flow [2024-06-03 20:22:34,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 520 transitions, 8026 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-03 20:22:34,565 INFO L231 Difference]: Finished difference. Result has 355 places, 496 transitions, 7005 flow [2024-06-03 20:22:34,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6685, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7005, PETRI_PLACES=355, PETRI_TRANSITIONS=496} [2024-06-03 20:22:34,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 20:22:34,566 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 496 transitions, 7005 flow [2024-06-03 20:22:34,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:34,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:34,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:34,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:22:34,566 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:34,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:34,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1845022704, now seen corresponding path program 2 times [2024-06-03 20:22:34,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:34,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352956488] [2024-06-03 20:22:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:35,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:35,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352956488] [2024-06-03 20:22:35,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352956488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:35,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:35,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:35,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126926759] [2024-06-03 20:22:35,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:35,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:35,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:35,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:35,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:35,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:35,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 496 transitions, 7005 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:35,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:35,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:35,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:36,495 INFO L124 PetriNetUnfolderBase]: 3494/5555 cut-off events. [2024-06-03 20:22:36,495 INFO L125 PetriNetUnfolderBase]: For 825834/825834 co-relation queries the response was YES. [2024-06-03 20:22:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 5555 events. 3494/5555 cut-off events. For 825834/825834 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33475 event pairs, 702 based on Foata normal form. 2/5556 useless extension candidates. Maximal degree in co-relation 50478. Up to 5248 conditions per place. [2024-06-03 20:22:36,587 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 481 selfloop transitions, 34 changer transitions 0/520 dead transitions. [2024-06-03 20:22:36,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 520 transitions, 8183 flow [2024-06-03 20:22:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:22:36,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 20:22:36,588 INFO L175 Difference]: Start difference. First operand has 355 places, 496 transitions, 7005 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:22:36,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 520 transitions, 8183 flow [2024-06-03 20:22:39,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 520 transitions, 8036 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 20:22:39,452 INFO L231 Difference]: Finished difference. Result has 360 places, 498 transitions, 7005 flow [2024-06-03 20:22:39,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7005, PETRI_PLACES=360, PETRI_TRANSITIONS=498} [2024-06-03 20:22:39,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-03 20:22:39,453 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 498 transitions, 7005 flow [2024-06-03 20:22:39,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:39,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:39,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:39,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:22:39,454 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:39,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2107646002, now seen corresponding path program 3 times [2024-06-03 20:22:39,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:39,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539104489] [2024-06-03 20:22:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:39,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:40,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:40,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539104489] [2024-06-03 20:22:40,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539104489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:40,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:40,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:40,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956673929] [2024-06-03 20:22:40,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:40,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:40,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:40,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:40,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:40,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 498 transitions, 7005 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:40,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:40,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:40,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:41,418 INFO L124 PetriNetUnfolderBase]: 3489/5543 cut-off events. [2024-06-03 20:22:41,418 INFO L125 PetriNetUnfolderBase]: For 829909/829909 co-relation queries the response was YES. [2024-06-03 20:22:41,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 5543 events. 3489/5543 cut-off events. For 829909/829909 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33326 event pairs, 695 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 50313. Up to 5231 conditions per place. [2024-06-03 20:22:41,504 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 476 selfloop transitions, 36 changer transitions 0/517 dead transitions. [2024-06-03 20:22:41,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 517 transitions, 8161 flow [2024-06-03 20:22:41,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:22:41,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:22:41,505 INFO L175 Difference]: Start difference. First operand has 360 places, 498 transitions, 7005 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:22:41,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 517 transitions, 8161 flow [2024-06-03 20:22:44,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 517 transitions, 8026 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:44,757 INFO L231 Difference]: Finished difference. Result has 362 places, 500 transitions, 7025 flow [2024-06-03 20:22:44,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6870, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7025, PETRI_PLACES=362, PETRI_TRANSITIONS=500} [2024-06-03 20:22:44,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-03 20:22:44,757 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 500 transitions, 7025 flow [2024-06-03 20:22:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:44,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:44,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:44,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:22:44,758 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:44,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:44,759 INFO L85 PathProgramCache]: Analyzing trace with hash -501351672, now seen corresponding path program 1 times [2024-06-03 20:22:44,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:44,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460815675] [2024-06-03 20:22:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:44,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:45,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:45,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460815675] [2024-06-03 20:22:45,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460815675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:45,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:45,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:45,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725250282] [2024-06-03 20:22:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:45,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:45,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:45,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:45,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 500 transitions, 7025 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:45,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:45,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:45,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:46,991 INFO L124 PetriNetUnfolderBase]: 3486/5543 cut-off events. [2024-06-03 20:22:46,991 INFO L125 PetriNetUnfolderBase]: For 831106/831108 co-relation queries the response was YES. [2024-06-03 20:22:47,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50425 conditions, 5543 events. 3486/5543 cut-off events. For 831106/831108 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33392 event pairs, 711 based on Foata normal form. 1/5543 useless extension candidates. Maximal degree in co-relation 50251. Up to 5106 conditions per place. [2024-06-03 20:22:47,073 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 75 changer transitions 0/524 dead transitions. [2024-06-03 20:22:47,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 524 transitions, 8157 flow [2024-06-03 20:22:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 20:22:47,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 20:22:47,074 INFO L175 Difference]: Start difference. First operand has 362 places, 500 transitions, 7025 flow. Second operand 8 states and 145 transitions. [2024-06-03 20:22:47,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 524 transitions, 8157 flow [2024-06-03 20:22:50,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 524 transitions, 8000 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:50,027 INFO L231 Difference]: Finished difference. Result has 364 places, 500 transitions, 7032 flow [2024-06-03 20:22:50,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6868, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7032, PETRI_PLACES=364, PETRI_TRANSITIONS=500} [2024-06-03 20:22:50,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-03 20:22:50,027 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 500 transitions, 7032 flow [2024-06-03 20:22:50,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:50,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:50,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:50,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:22:50,028 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:50,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1491850822, now seen corresponding path program 7 times [2024-06-03 20:22:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173974407] [2024-06-03 20:22:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:50,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:50,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173974407] [2024-06-03 20:22:50,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173974407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:50,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:50,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:50,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079311521] [2024-06-03 20:22:50,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:50,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:50,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:50,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:50,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:50,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:50,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 500 transitions, 7032 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:50,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:50,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:50,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:51,987 INFO L124 PetriNetUnfolderBase]: 3491/5542 cut-off events. [2024-06-03 20:22:51,988 INFO L125 PetriNetUnfolderBase]: For 846986/846986 co-relation queries the response was YES. [2024-06-03 20:22:52,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50666 conditions, 5542 events. 3491/5542 cut-off events. For 846986/846986 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33424 event pairs, 683 based on Foata normal form. 1/5538 useless extension candidates. Maximal degree in co-relation 50491. Up to 5156 conditions per place. [2024-06-03 20:22:52,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 467 selfloop transitions, 53 changer transitions 0/525 dead transitions. [2024-06-03 20:22:52,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 525 transitions, 8265 flow [2024-06-03 20:22:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:22:52,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:22:52,083 INFO L175 Difference]: Start difference. First operand has 364 places, 500 transitions, 7032 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:22:52,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 525 transitions, 8265 flow [2024-06-03 20:22:54,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 525 transitions, 8112 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:22:54,608 INFO L231 Difference]: Finished difference. Result has 365 places, 503 transitions, 7103 flow [2024-06-03 20:22:54,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6879, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7103, PETRI_PLACES=365, PETRI_TRANSITIONS=503} [2024-06-03 20:22:54,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-03 20:22:54,609 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 503 transitions, 7103 flow [2024-06-03 20:22:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:54,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:54,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:54,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:22:54,609 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:54,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash -527876282, now seen corresponding path program 8 times [2024-06-03 20:22:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:54,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810317258] [2024-06-03 20:22:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:54,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:55,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:55,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810317258] [2024-06-03 20:22:55,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810317258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:55,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:55,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:55,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270445356] [2024-06-03 20:22:55,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:55,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:55,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:55,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 503 transitions, 7103 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:55,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:55,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:55,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:56,519 INFO L124 PetriNetUnfolderBase]: 3488/5538 cut-off events. [2024-06-03 20:22:56,519 INFO L125 PetriNetUnfolderBase]: For 840720/840720 co-relation queries the response was YES. [2024-06-03 20:22:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50449 conditions, 5538 events. 3488/5538 cut-off events. For 840720/840720 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33351 event pairs, 690 based on Foata normal form. 1/5534 useless extension candidates. Maximal degree in co-relation 50274. Up to 5144 conditions per place. [2024-06-03 20:22:56,602 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 57 changer transitions 0/523 dead transitions. [2024-06-03 20:22:56,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 523 transitions, 8220 flow [2024-06-03 20:22:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 20:22:56,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 20:22:56,603 INFO L175 Difference]: Start difference. First operand has 365 places, 503 transitions, 7103 flow. Second operand 8 states and 137 transitions. [2024-06-03 20:22:56,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 523 transitions, 8220 flow [2024-06-03 20:22:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 523 transitions, 7964 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-03 20:22:58,566 INFO L231 Difference]: Finished difference. Result has 367 places, 503 transitions, 6967 flow [2024-06-03 20:22:58,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6967, PETRI_PLACES=367, PETRI_TRANSITIONS=503} [2024-06-03 20:22:58,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-03 20:22:58,567 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 503 transitions, 6967 flow [2024-06-03 20:22:58,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:58,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:58,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:22:58,567 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:58,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:58,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1732903790, now seen corresponding path program 9 times [2024-06-03 20:22:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824017275] [2024-06-03 20:22:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:59,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824017275] [2024-06-03 20:22:59,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824017275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:59,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:59,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:22:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681572507] [2024-06-03 20:22:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:59,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:22:59,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:22:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:22:59,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:22:59,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 503 transitions, 6967 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:59,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:59,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:22:59,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:00,416 INFO L124 PetriNetUnfolderBase]: 3506/5565 cut-off events. [2024-06-03 20:23:00,416 INFO L125 PetriNetUnfolderBase]: For 867864/867864 co-relation queries the response was YES. [2024-06-03 20:23:00,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50940 conditions, 5565 events. 3506/5565 cut-off events. For 867864/867864 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33554 event pairs, 687 based on Foata normal form. 2/5562 useless extension candidates. Maximal degree in co-relation 50764. Up to 5108 conditions per place. [2024-06-03 20:23:00,500 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 447 selfloop transitions, 75 changer transitions 0/527 dead transitions. [2024-06-03 20:23:00,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 527 transitions, 8530 flow [2024-06-03 20:23:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:23:00,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:23:00,501 INFO L175 Difference]: Start difference. First operand has 367 places, 503 transitions, 6967 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:23:00,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 527 transitions, 8530 flow [2024-06-03 20:23:03,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 527 transitions, 8336 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:03,751 INFO L231 Difference]: Finished difference. Result has 368 places, 510 transitions, 7174 flow [2024-06-03 20:23:03,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6773, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7174, PETRI_PLACES=368, PETRI_TRANSITIONS=510} [2024-06-03 20:23:03,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-03 20:23:03,752 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 510 transitions, 7174 flow [2024-06-03 20:23:03,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:03,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:03,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:03,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:23:03,753 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:03,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash 537135292, now seen corresponding path program 10 times [2024-06-03 20:23:03,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:03,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685821548] [2024-06-03 20:23:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:04,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:04,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685821548] [2024-06-03 20:23:04,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685821548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:04,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90641707] [2024-06-03 20:23:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:04,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:04,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 510 transitions, 7174 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:04,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:04,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:05,572 INFO L124 PetriNetUnfolderBase]: 3516/5580 cut-off events. [2024-06-03 20:23:05,572 INFO L125 PetriNetUnfolderBase]: For 888368/888372 co-relation queries the response was YES. [2024-06-03 20:23:05,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51680 conditions, 5580 events. 3516/5580 cut-off events. For 888368/888372 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33652 event pairs, 712 based on Foata normal form. 6/5580 useless extension candidates. Maximal degree in co-relation 51503. Up to 4991 conditions per place. [2024-06-03 20:23:05,653 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 106 changer transitions 0/532 dead transitions. [2024-06-03 20:23:05,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 532 transitions, 9021 flow [2024-06-03 20:23:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:23:05,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 20:23:05,655 INFO L175 Difference]: Start difference. First operand has 368 places, 510 transitions, 7174 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:23:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 532 transitions, 9021 flow [2024-06-03 20:23:08,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 532 transitions, 8803 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:08,718 INFO L231 Difference]: Finished difference. Result has 372 places, 517 transitions, 7433 flow [2024-06-03 20:23:08,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7433, PETRI_PLACES=372, PETRI_TRANSITIONS=517} [2024-06-03 20:23:08,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-03 20:23:08,719 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 517 transitions, 7433 flow [2024-06-03 20:23:08,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:08,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:08,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:08,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:23:08,719 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:08,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash 874852812, now seen corresponding path program 11 times [2024-06-03 20:23:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602297781] [2024-06-03 20:23:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602297781] [2024-06-03 20:23:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602297781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:09,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513002133] [2024-06-03 20:23:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:09,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:09,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 517 transitions, 7433 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:09,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:09,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:09,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:10,663 INFO L124 PetriNetUnfolderBase]: 3534/5607 cut-off events. [2024-06-03 20:23:10,663 INFO L125 PetriNetUnfolderBase]: For 913992/913996 co-relation queries the response was YES. [2024-06-03 20:23:10,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52763 conditions, 5607 events. 3534/5607 cut-off events. For 913992/913996 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33865 event pairs, 712 based on Foata normal form. 6/5607 useless extension candidates. Maximal degree in co-relation 52584. Up to 5010 conditions per place. [2024-06-03 20:23:10,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 117 changer transitions 0/539 dead transitions. [2024-06-03 20:23:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 539 transitions, 9314 flow [2024-06-03 20:23:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:23:10,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:23:10,744 INFO L175 Difference]: Start difference. First operand has 372 places, 517 transitions, 7433 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:23:10,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 539 transitions, 9314 flow [2024-06-03 20:23:13,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 539 transitions, 8931 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-03 20:23:13,274 INFO L231 Difference]: Finished difference. Result has 375 places, 525 transitions, 7613 flow [2024-06-03 20:23:13,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7613, PETRI_PLACES=375, PETRI_TRANSITIONS=525} [2024-06-03 20:23:13,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-03 20:23:13,274 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 525 transitions, 7613 flow [2024-06-03 20:23:13,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:13,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:13,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:13,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:23:13,275 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:13,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:13,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1262169178, now seen corresponding path program 12 times [2024-06-03 20:23:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:13,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333726867] [2024-06-03 20:23:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:14,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:14,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333726867] [2024-06-03 20:23:14,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333726867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:14,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:14,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:14,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337350755] [2024-06-03 20:23:14,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:14,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:14,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:14,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:14,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 525 transitions, 7613 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:14,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:14,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:14,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:15,288 INFO L124 PetriNetUnfolderBase]: 3528/5605 cut-off events. [2024-06-03 20:23:15,289 INFO L125 PetriNetUnfolderBase]: For 909844/909844 co-relation queries the response was YES. [2024-06-03 20:23:15,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52095 conditions, 5605 events. 3528/5605 cut-off events. For 909844/909844 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33898 event pairs, 704 based on Foata normal form. 2/5602 useless extension candidates. Maximal degree in co-relation 51915. Up to 5254 conditions per place. [2024-06-03 20:23:15,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 483 selfloop transitions, 48 changer transitions 0/536 dead transitions. [2024-06-03 20:23:15,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 536 transitions, 8711 flow [2024-06-03 20:23:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:23:15,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:23:15,368 INFO L175 Difference]: Start difference. First operand has 375 places, 525 transitions, 7613 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:23:15,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 536 transitions, 8711 flow [2024-06-03 20:23:17,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 536 transitions, 8385 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:17,926 INFO L231 Difference]: Finished difference. Result has 379 places, 525 transitions, 7390 flow [2024-06-03 20:23:17,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7287, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7390, PETRI_PLACES=379, PETRI_TRANSITIONS=525} [2024-06-03 20:23:17,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-03 20:23:17,926 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 525 transitions, 7390 flow [2024-06-03 20:23:17,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:17,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:17,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:17,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:23:17,928 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:17,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -531592128, now seen corresponding path program 2 times [2024-06-03 20:23:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:17,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990700689] [2024-06-03 20:23:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:17,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:18,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:18,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990700689] [2024-06-03 20:23:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990700689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:18,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402884238] [2024-06-03 20:23:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:18,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:18,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:18,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:18,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:18,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 525 transitions, 7390 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:18,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:18,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:20,124 INFO L124 PetriNetUnfolderBase]: 3533/5615 cut-off events. [2024-06-03 20:23:20,124 INFO L125 PetriNetUnfolderBase]: For 912637/912637 co-relation queries the response was YES. [2024-06-03 20:23:20,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51972 conditions, 5615 events. 3533/5615 cut-off events. For 912637/912637 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33899 event pairs, 698 based on Foata normal form. 1/5613 useless extension candidates. Maximal degree in co-relation 51791. Up to 5176 conditions per place. [2024-06-03 20:23:20,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 471 selfloop transitions, 73 changer transitions 0/549 dead transitions. [2024-06-03 20:23:20,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 549 transitions, 8630 flow [2024-06-03 20:23:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:23:20,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 20:23:20,201 INFO L175 Difference]: Start difference. First operand has 379 places, 525 transitions, 7390 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:23:20,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 549 transitions, 8630 flow [2024-06-03 20:23:22,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 549 transitions, 8415 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 20:23:22,976 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 7413 flow [2024-06-03 20:23:22,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7175, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7413, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-03 20:23:22,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:23:22,976 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 7413 flow [2024-06-03 20:23:22,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:22,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:22,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:22,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:23:22,977 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:22,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1812609252, now seen corresponding path program 3 times [2024-06-03 20:23:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:22,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584163114] [2024-06-03 20:23:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:22,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:23,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:23,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584163114] [2024-06-03 20:23:23,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584163114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:23,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:23,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:23,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132778881] [2024-06-03 20:23:23,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:23,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:23,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:23,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 7413 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:23,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:23,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:23,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:25,258 INFO L124 PetriNetUnfolderBase]: 3530/5610 cut-off events. [2024-06-03 20:23:25,258 INFO L125 PetriNetUnfolderBase]: For 920989/920989 co-relation queries the response was YES. [2024-06-03 20:23:25,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51885 conditions, 5610 events. 3530/5610 cut-off events. For 920989/920989 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33882 event pairs, 692 based on Foata normal form. 1/5608 useless extension candidates. Maximal degree in co-relation 51705. Up to 5172 conditions per place. [2024-06-03 20:23:25,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 75 changer transitions 0/550 dead transitions. [2024-06-03 20:23:25,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 550 transitions, 8589 flow [2024-06-03 20:23:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:23:25,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:23:25,344 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 7413 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:23:25,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 550 transitions, 8589 flow [2024-06-03 20:23:28,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 550 transitions, 8395 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:23:28,242 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 7381 flow [2024-06-03 20:23:28,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7381, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-03 20:23:28,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:23:28,243 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 7381 flow [2024-06-03 20:23:28,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:28,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:28,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:28,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:23:28,243 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:28,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1919236466, now seen corresponding path program 4 times [2024-06-03 20:23:28,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:28,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962481038] [2024-06-03 20:23:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:28,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962481038] [2024-06-03 20:23:29,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962481038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:29,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174245755] [2024-06-03 20:23:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:29,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:29,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:29,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:29,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:29,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 7381 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:30,523 INFO L124 PetriNetUnfolderBase]: 3520/5591 cut-off events. [2024-06-03 20:23:30,523 INFO L125 PetriNetUnfolderBase]: For 914093/914093 co-relation queries the response was YES. [2024-06-03 20:23:30,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51475 conditions, 5591 events. 3520/5591 cut-off events. For 914093/914093 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33777 event pairs, 691 based on Foata normal form. 2/5590 useless extension candidates. Maximal degree in co-relation 51295. Up to 5057 conditions per place. [2024-06-03 20:23:30,605 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 99 changer transitions 0/548 dead transitions. [2024-06-03 20:23:30,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 548 transitions, 8545 flow [2024-06-03 20:23:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 20:23:30,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 20:23:30,607 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 7381 flow. Second operand 8 states and 140 transitions. [2024-06-03 20:23:30,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 548 transitions, 8545 flow [2024-06-03 20:23:33,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 548 transitions, 8349 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:23:33,719 INFO L231 Difference]: Finished difference. Result has 378 places, 528 transitions, 7397 flow [2024-06-03 20:23:33,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7397, PETRI_PLACES=378, PETRI_TRANSITIONS=528} [2024-06-03 20:23:33,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:23:33,720 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 528 transitions, 7397 flow [2024-06-03 20:23:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:33,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:33,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:23:33,725 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:33,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1501146714, now seen corresponding path program 1 times [2024-06-03 20:23:33,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:33,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827364273] [2024-06-03 20:23:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:34,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:34,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827364273] [2024-06-03 20:23:34,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827364273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:34,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:34,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:34,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700895102] [2024-06-03 20:23:34,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:34,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:34,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:34,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:34,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:34,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:34,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 528 transitions, 7397 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:34,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:34,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:34,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:35,992 INFO L124 PetriNetUnfolderBase]: 3513/5584 cut-off events. [2024-06-03 20:23:35,992 INFO L125 PetriNetUnfolderBase]: For 900950/900950 co-relation queries the response was YES. [2024-06-03 20:23:36,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51333 conditions, 5584 events. 3513/5584 cut-off events. For 900950/900950 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33704 event pairs, 691 based on Foata normal form. 1/5582 useless extension candidates. Maximal degree in co-relation 51153. Up to 5241 conditions per place. [2024-06-03 20:23:36,080 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 50 changer transitions 0/546 dead transitions. [2024-06-03 20:23:36,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 546 transitions, 8573 flow [2024-06-03 20:23:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:23:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:23:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:23:36,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 20:23:36,081 INFO L175 Difference]: Start difference. First operand has 378 places, 528 transitions, 7397 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:23:36,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 546 transitions, 8573 flow [2024-06-03 20:23:39,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 546 transitions, 8327 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:23:39,077 INFO L231 Difference]: Finished difference. Result has 379 places, 530 transitions, 7298 flow [2024-06-03 20:23:39,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7298, PETRI_PLACES=379, PETRI_TRANSITIONS=530} [2024-06-03 20:23:39,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-03 20:23:39,078 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 530 transitions, 7298 flow [2024-06-03 20:23:39,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:39,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:39,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:39,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:23:39,078 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:39,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2123782236, now seen corresponding path program 2 times [2024-06-03 20:23:39,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:39,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497201267] [2024-06-03 20:23:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:39,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:39,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:39,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497201267] [2024-06-03 20:23:39,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497201267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:39,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:39,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:39,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158863702] [2024-06-03 20:23:39,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:39,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:39,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:39,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:39,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 530 transitions, 7298 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:39,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:39,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:39,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:41,223 INFO L124 PetriNetUnfolderBase]: 3563/5661 cut-off events. [2024-06-03 20:23:41,223 INFO L125 PetriNetUnfolderBase]: For 934791/934793 co-relation queries the response was YES. [2024-06-03 20:23:41,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52304 conditions, 5661 events. 3563/5661 cut-off events. For 934791/934793 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 34225 event pairs, 730 based on Foata normal form. 1/5659 useless extension candidates. Maximal degree in co-relation 52124. Up to 4611 conditions per place. [2024-06-03 20:23:41,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 206 changer transitions 0/559 dead transitions. [2024-06-03 20:23:41,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 9190 flow [2024-06-03 20:23:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 20:23:41,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 20:23:41,298 INFO L175 Difference]: Start difference. First operand has 379 places, 530 transitions, 7298 flow. Second operand 8 states and 143 transitions. [2024-06-03 20:23:41,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 9190 flow [2024-06-03 20:23:44,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 559 transitions, 9040 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:44,190 INFO L231 Difference]: Finished difference. Result has 380 places, 544 transitions, 7844 flow [2024-06-03 20:23:44,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7177, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7844, PETRI_PLACES=380, PETRI_TRANSITIONS=544} [2024-06-03 20:23:44,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-03 20:23:44,190 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 544 transitions, 7844 flow [2024-06-03 20:23:44,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:44,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:44,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:23:44,191 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:44,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:44,191 INFO L85 PathProgramCache]: Analyzing trace with hash -701360228, now seen corresponding path program 3 times [2024-06-03 20:23:44,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:44,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24869294] [2024-06-03 20:23:44,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:44,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:44,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:44,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24869294] [2024-06-03 20:23:44,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24869294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:44,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:44,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083793841] [2024-06-03 20:23:44,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:44,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:44,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 544 transitions, 7844 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:44,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:44,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:44,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:46,255 INFO L124 PetriNetUnfolderBase]: 3576/5677 cut-off events. [2024-06-03 20:23:46,255 INFO L125 PetriNetUnfolderBase]: For 958709/958711 co-relation queries the response was YES. [2024-06-03 20:23:46,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53277 conditions, 5677 events. 3576/5677 cut-off events. For 958709/958711 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34265 event pairs, 730 based on Foata normal form. 1/5675 useless extension candidates. Maximal degree in co-relation 53096. Up to 4626 conditions per place. [2024-06-03 20:23:46,331 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 207 changer transitions 0/564 dead transitions. [2024-06-03 20:23:46,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 564 transitions, 9592 flow [2024-06-03 20:23:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 20:23:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 20:23:46,332 INFO L175 Difference]: Start difference. First operand has 380 places, 544 transitions, 7844 flow. Second operand 8 states and 141 transitions. [2024-06-03 20:23:46,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 564 transitions, 9592 flow [2024-06-03 20:23:49,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 564 transitions, 9178 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:49,351 INFO L231 Difference]: Finished difference. Result has 384 places, 550 transitions, 7974 flow [2024-06-03 20:23:49,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7974, PETRI_PLACES=384, PETRI_TRANSITIONS=550} [2024-06-03 20:23:49,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-03 20:23:49,352 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 550 transitions, 7974 flow [2024-06-03 20:23:49,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:49,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:49,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:23:49,352 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:49,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1574620590, now seen corresponding path program 4 times [2024-06-03 20:23:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56131236] [2024-06-03 20:23:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:50,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56131236] [2024-06-03 20:23:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56131236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:50,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:50,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:50,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491056010] [2024-06-03 20:23:50,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:50,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:50,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:50,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:50,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:50,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:50,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 550 transitions, 7974 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:50,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:50,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:50,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:51,629 INFO L124 PetriNetUnfolderBase]: 3573/5677 cut-off events. [2024-06-03 20:23:51,629 INFO L125 PetriNetUnfolderBase]: For 966550/966554 co-relation queries the response was YES. [2024-06-03 20:23:51,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53232 conditions, 5677 events. 3573/5677 cut-off events. For 966550/966554 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34330 event pairs, 709 based on Foata normal form. 5/5679 useless extension candidates. Maximal degree in co-relation 53050. Up to 5272 conditions per place. [2024-06-03 20:23:51,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 487 selfloop transitions, 71 changer transitions 0/563 dead transitions. [2024-06-03 20:23:51,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 563 transitions, 9160 flow [2024-06-03 20:23:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:51,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-03 20:23:51,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-03 20:23:51,708 INFO L175 Difference]: Start difference. First operand has 384 places, 550 transitions, 7974 flow. Second operand 8 states and 133 transitions. [2024-06-03 20:23:51,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 563 transitions, 9160 flow [2024-06-03 20:23:54,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 563 transitions, 8796 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:54,940 INFO L231 Difference]: Finished difference. Result has 388 places, 552 transitions, 7796 flow [2024-06-03 20:23:54,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7612, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7796, PETRI_PLACES=388, PETRI_TRANSITIONS=552} [2024-06-03 20:23:54,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-03 20:23:54,940 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 552 transitions, 7796 flow [2024-06-03 20:23:54,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:54,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:54,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:54,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:23:54,941 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:54,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1574353680, now seen corresponding path program 5 times [2024-06-03 20:23:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303913107] [2024-06-03 20:23:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:54,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303913107] [2024-06-03 20:23:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303913107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:55,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:23:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409448802] [2024-06-03 20:23:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:55,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:23:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:55,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:23:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:23:55,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:23:55,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 552 transitions, 7796 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:55,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:55,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:23:55,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:57,180 INFO L124 PetriNetUnfolderBase]: 3566/5667 cut-off events. [2024-06-03 20:23:57,180 INFO L125 PetriNetUnfolderBase]: For 971259/971263 co-relation queries the response was YES. [2024-06-03 20:23:57,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52432 conditions, 5667 events. 3566/5667 cut-off events. For 971259/971263 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34267 event pairs, 709 based on Foata normal form. 5/5669 useless extension candidates. Maximal degree in co-relation 52249. Up to 5249 conditions per place. [2024-06-03 20:23:57,259 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 479 selfloop transitions, 83 changer transitions 0/567 dead transitions. [2024-06-03 20:23:57,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 567 transitions, 9230 flow [2024-06-03 20:23:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:23:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:23:57,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 20:23:57,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 20:23:57,260 INFO L175 Difference]: Start difference. First operand has 388 places, 552 transitions, 7796 flow. Second operand 9 states and 148 transitions. [2024-06-03 20:23:57,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 567 transitions, 9230 flow [2024-06-03 20:24:00,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 567 transitions, 9034 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:24:00,021 INFO L231 Difference]: Finished difference. Result has 392 places, 554 transitions, 7826 flow [2024-06-03 20:24:00,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7826, PETRI_PLACES=392, PETRI_TRANSITIONS=554} [2024-06-03 20:24:00,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-03 20:24:00,021 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 554 transitions, 7826 flow [2024-06-03 20:24:00,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:00,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:00,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:00,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:24:00,022 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:00,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1367491920, now seen corresponding path program 6 times [2024-06-03 20:24:00,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:00,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060405290] [2024-06-03 20:24:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:00,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:00,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:00,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060405290] [2024-06-03 20:24:00,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060405290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:00,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:00,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:00,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135832296] [2024-06-03 20:24:00,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:00,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:00,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:00,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:00,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 554 transitions, 7826 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:00,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:00,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:00,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:02,184 INFO L124 PetriNetUnfolderBase]: 3556/5653 cut-off events. [2024-06-03 20:24:02,184 INFO L125 PetriNetUnfolderBase]: For 979690/979694 co-relation queries the response was YES. [2024-06-03 20:24:02,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52247 conditions, 5653 events. 3556/5653 cut-off events. For 979690/979694 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34202 event pairs, 707 based on Foata normal form. 6/5656 useless extension candidates. Maximal degree in co-relation 52062. Up to 5228 conditions per place. [2024-06-03 20:24:02,263 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 81 changer transitions 0/568 dead transitions. [2024-06-03 20:24:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 568 transitions, 9022 flow [2024-06-03 20:24:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-03 20:24:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-03 20:24:02,264 INFO L175 Difference]: Start difference. First operand has 392 places, 554 transitions, 7826 flow. Second operand 9 states and 147 transitions. [2024-06-03 20:24:02,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 568 transitions, 9022 flow [2024-06-03 20:24:05,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 568 transitions, 8746 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:05,275 INFO L231 Difference]: Finished difference. Result has 394 places, 556 transitions, 7759 flow [2024-06-03 20:24:05,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7759, PETRI_PLACES=394, PETRI_TRANSITIONS=556} [2024-06-03 20:24:05,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-03 20:24:05,276 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 556 transitions, 7759 flow [2024-06-03 20:24:05,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:05,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:05,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:05,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:24:05,276 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:05,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:05,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1781463088, now seen corresponding path program 4 times [2024-06-03 20:24:05,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:05,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221020006] [2024-06-03 20:24:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:05,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:05,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:05,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221020006] [2024-06-03 20:24:05,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221020006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:05,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:05,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:05,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046467775] [2024-06-03 20:24:05,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:05,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:05,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:05,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 556 transitions, 7759 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:05,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:05,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:05,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:07,633 INFO L124 PetriNetUnfolderBase]: 3615/5749 cut-off events. [2024-06-03 20:24:07,634 INFO L125 PetriNetUnfolderBase]: For 993719/993719 co-relation queries the response was YES. [2024-06-03 20:24:07,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52871 conditions, 5749 events. 3615/5749 cut-off events. For 993719/993719 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34843 event pairs, 692 based on Foata normal form. 2/5750 useless extension candidates. Maximal degree in co-relation 52685. Up to 5385 conditions per place. [2024-06-03 20:24:07,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 45 changer transitions 0/600 dead transitions. [2024-06-03 20:24:07,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 600 transitions, 9255 flow [2024-06-03 20:24:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:07,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:24:07,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:24:07,713 INFO L175 Difference]: Start difference. First operand has 394 places, 556 transitions, 7759 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:24:07,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 600 transitions, 9255 flow [2024-06-03 20:24:11,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 600 transitions, 9088 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:24:11,091 INFO L231 Difference]: Finished difference. Result has 399 places, 572 transitions, 7941 flow [2024-06-03 20:24:11,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7592, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7941, PETRI_PLACES=399, PETRI_TRANSITIONS=572} [2024-06-03 20:24:11,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-03 20:24:11,092 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 572 transitions, 7941 flow [2024-06-03 20:24:11,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:11,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:11,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:24:11,094 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:11,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash -785950116, now seen corresponding path program 5 times [2024-06-03 20:24:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:11,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981543050] [2024-06-03 20:24:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:11,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:11,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981543050] [2024-06-03 20:24:11,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981543050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:11,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:11,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:11,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006019095] [2024-06-03 20:24:11,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:11,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:11,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:11,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 572 transitions, 7941 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:11,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:11,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:11,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:13,186 INFO L124 PetriNetUnfolderBase]: 3679/5862 cut-off events. [2024-06-03 20:24:13,186 INFO L125 PetriNetUnfolderBase]: For 1011876/1011876 co-relation queries the response was YES. [2024-06-03 20:24:13,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53825 conditions, 5862 events. 3679/5862 cut-off events. For 1011876/1011876 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 35780 event pairs, 712 based on Foata normal form. 2/5863 useless extension candidates. Maximal degree in co-relation 53636. Up to 5470 conditions per place. [2024-06-03 20:24:13,272 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 50 changer transitions 0/614 dead transitions. [2024-06-03 20:24:13,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 614 transitions, 9503 flow [2024-06-03 20:24:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:24:13,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:24:13,275 INFO L175 Difference]: Start difference. First operand has 399 places, 572 transitions, 7941 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:24:13,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 614 transitions, 9503 flow [2024-06-03 20:24:16,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 614 transitions, 9320 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-03 20:24:16,666 INFO L231 Difference]: Finished difference. Result has 406 places, 584 transitions, 8142 flow [2024-06-03 20:24:16,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7831, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8142, PETRI_PLACES=406, PETRI_TRANSITIONS=584} [2024-06-03 20:24:16,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-03 20:24:16,668 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 584 transitions, 8142 flow [2024-06-03 20:24:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:16,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:24:16,670 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:16,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1775231248, now seen corresponding path program 6 times [2024-06-03 20:24:16,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:16,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681902022] [2024-06-03 20:24:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:16,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:17,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:17,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681902022] [2024-06-03 20:24:17,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681902022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:17,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:17,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:24:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227165695] [2024-06-03 20:24:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:17,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:24:17,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:17,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:24:17,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:24:17,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:17,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 584 transitions, 8142 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:17,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:17,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:17,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:18,792 INFO L124 PetriNetUnfolderBase]: 3731/5948 cut-off events. [2024-06-03 20:24:18,792 INFO L125 PetriNetUnfolderBase]: For 1012251/1012251 co-relation queries the response was YES. [2024-06-03 20:24:18,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54165 conditions, 5948 events. 3731/5948 cut-off events. For 1012251/1012251 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36475 event pairs, 658 based on Foata normal form. 2/5949 useless extension candidates. Maximal degree in co-relation 53974. Up to 5443 conditions per place. [2024-06-03 20:24:18,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 65 changer transitions 0/629 dead transitions. [2024-06-03 20:24:18,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 629 transitions, 9782 flow [2024-06-03 20:24:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 20:24:18,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 20:24:18,874 INFO L175 Difference]: Start difference. First operand has 406 places, 584 transitions, 8142 flow. Second operand 9 states and 157 transitions. [2024-06-03 20:24:18,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 629 transitions, 9782 flow [2024-06-03 20:24:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 629 transitions, 9529 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:21,955 INFO L231 Difference]: Finished difference. Result has 409 places, 599 transitions, 8362 flow [2024-06-03 20:24:21,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7962, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8362, PETRI_PLACES=409, PETRI_TRANSITIONS=599} [2024-06-03 20:24:21,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-03 20:24:21,955 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 599 transitions, 8362 flow [2024-06-03 20:24:21,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:21,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:21,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:24:21,956 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:21,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash -874480315, now seen corresponding path program 1 times [2024-06-03 20:24:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:21,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796431108] [2024-06-03 20:24:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:21,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:22,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796431108] [2024-06-03 20:24:22,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796431108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:22,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:22,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:24:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112389333] [2024-06-03 20:24:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:22,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:24:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:24:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:24:23,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:23,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 599 transitions, 8362 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:23,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:23,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:23,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:24,550 INFO L124 PetriNetUnfolderBase]: 3776/6015 cut-off events. [2024-06-03 20:24:24,550 INFO L125 PetriNetUnfolderBase]: For 1070039/1070039 co-relation queries the response was YES. [2024-06-03 20:24:24,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55640 conditions, 6015 events. 3776/6015 cut-off events. For 1070039/1070039 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36892 event pairs, 664 based on Foata normal form. 4/6017 useless extension candidates. Maximal degree in co-relation 55448. Up to 5384 conditions per place. [2024-06-03 20:24:24,635 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 542 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-03 20:24:24,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 630 transitions, 10153 flow [2024-06-03 20:24:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 20:24:24,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 20:24:24,637 INFO L175 Difference]: Start difference. First operand has 409 places, 599 transitions, 8362 flow. Second operand 9 states and 156 transitions. [2024-06-03 20:24:24,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 630 transitions, 10153 flow [2024-06-03 20:24:28,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 630 transitions, 9954 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:28,041 INFO L231 Difference]: Finished difference. Result has 412 places, 605 transitions, 8552 flow [2024-06-03 20:24:28,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8163, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8552, PETRI_PLACES=412, PETRI_TRANSITIONS=605} [2024-06-03 20:24:28,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-03 20:24:28,042 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 605 transitions, 8552 flow [2024-06-03 20:24:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:28,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:28,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:24:28,042 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:28,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash -872602645, now seen corresponding path program 2 times [2024-06-03 20:24:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:28,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963793314] [2024-06-03 20:24:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963793314] [2024-06-03 20:24:29,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963793314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:29,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:24:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821331489] [2024-06-03 20:24:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:29,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:24:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:24:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:24:29,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:29,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 605 transitions, 8552 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:29,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:29,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:29,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:30,551 INFO L124 PetriNetUnfolderBase]: 3792/6039 cut-off events. [2024-06-03 20:24:30,551 INFO L125 PetriNetUnfolderBase]: For 1090721/1090721 co-relation queries the response was YES. [2024-06-03 20:24:30,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56227 conditions, 6039 events. 3792/6039 cut-off events. For 1090721/1090721 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37093 event pairs, 759 based on Foata normal form. 4/6040 useless extension candidates. Maximal degree in co-relation 56034. Up to 5452 conditions per place. [2024-06-03 20:24:30,641 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 516 selfloop transitions, 108 changer transitions 0/629 dead transitions. [2024-06-03 20:24:30,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 629 transitions, 9987 flow [2024-06-03 20:24:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 20:24:30,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 20:24:30,643 INFO L175 Difference]: Start difference. First operand has 412 places, 605 transitions, 8552 flow. Second operand 9 states and 154 transitions. [2024-06-03 20:24:30,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 629 transitions, 9987 flow [2024-06-03 20:24:34,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 629 transitions, 9703 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-03 20:24:34,234 INFO L231 Difference]: Finished difference. Result has 415 places, 608 transitions, 8601 flow [2024-06-03 20:24:34,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8270, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8601, PETRI_PLACES=415, PETRI_TRANSITIONS=608} [2024-06-03 20:24:34,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-03 20:24:34,235 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 608 transitions, 8601 flow [2024-06-03 20:24:34,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:34,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:34,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:34,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:24:34,236 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:34,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash -872606365, now seen corresponding path program 3 times [2024-06-03 20:24:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:34,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410893240] [2024-06-03 20:24:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:34,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:35,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410893240] [2024-06-03 20:24:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410893240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:35,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:35,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:24:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424435272] [2024-06-03 20:24:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:35,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:24:35,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:35,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:24:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:24:35,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:35,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 608 transitions, 8601 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:35,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:35,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:36,813 INFO L124 PetriNetUnfolderBase]: 3837/6110 cut-off events. [2024-06-03 20:24:36,814 INFO L125 PetriNetUnfolderBase]: For 1135150/1135150 co-relation queries the response was YES. [2024-06-03 20:24:36,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 6110 events. 3837/6110 cut-off events. For 1135150/1135150 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37557 event pairs, 761 based on Foata normal form. 4/6111 useless extension candidates. Maximal degree in co-relation 57269. Up to 5446 conditions per place. [2024-06-03 20:24:36,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 529 selfloop transitions, 102 changer transitions 0/636 dead transitions. [2024-06-03 20:24:36,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 636 transitions, 10412 flow [2024-06-03 20:24:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 20:24:36,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 20:24:36,908 INFO L175 Difference]: Start difference. First operand has 415 places, 608 transitions, 8601 flow. Second operand 9 states and 155 transitions. [2024-06-03 20:24:36,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 636 transitions, 10412 flow [2024-06-03 20:24:41,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 636 transitions, 10105 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:41,339 INFO L231 Difference]: Finished difference. Result has 418 places, 614 transitions, 8748 flow [2024-06-03 20:24:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8748, PETRI_PLACES=418, PETRI_TRANSITIONS=614} [2024-06-03 20:24:41,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 20:24:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 614 transitions, 8748 flow [2024-06-03 20:24:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:41,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:41,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:24:41,340 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:41,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -785760733, now seen corresponding path program 1 times [2024-06-03 20:24:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:41,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884413079] [2024-06-03 20:24:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:42,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884413079] [2024-06-03 20:24:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884413079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:42,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:42,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:24:42,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084045052] [2024-06-03 20:24:42,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:42,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:24:42,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:24:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:24:42,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:42,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 614 transitions, 8748 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:42,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:42,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:42,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:44,031 INFO L124 PetriNetUnfolderBase]: 3945/6276 cut-off events. [2024-06-03 20:24:44,032 INFO L125 PetriNetUnfolderBase]: For 1295664/1295664 co-relation queries the response was YES. [2024-06-03 20:24:44,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59166 conditions, 6276 events. 3945/6276 cut-off events. For 1295664/1295664 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 38663 event pairs, 780 based on Foata normal form. 20/6293 useless extension candidates. Maximal degree in co-relation 58970. Up to 5625 conditions per place. [2024-06-03 20:24:44,134 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 546 selfloop transitions, 99 changer transitions 0/650 dead transitions. [2024-06-03 20:24:44,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 650 transitions, 10328 flow [2024-06-03 20:24:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:24:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:24:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 20:24:44,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-03 20:24:44,136 INFO L175 Difference]: Start difference. First operand has 418 places, 614 transitions, 8748 flow. Second operand 10 states and 173 transitions. [2024-06-03 20:24:44,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 650 transitions, 10328 flow [2024-06-03 20:24:48,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 650 transitions, 10068 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-03 20:24:48,919 INFO L231 Difference]: Finished difference. Result has 424 places, 623 transitions, 8886 flow [2024-06-03 20:24:48,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8488, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8886, PETRI_PLACES=424, PETRI_TRANSITIONS=623} [2024-06-03 20:24:48,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-03 20:24:48,919 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 623 transitions, 8886 flow [2024-06-03 20:24:48,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:48,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:48,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:48,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:24:48,920 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:48,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:48,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1501345331, now seen corresponding path program 4 times [2024-06-03 20:24:48,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:48,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780659092] [2024-06-03 20:24:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:49,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780659092] [2024-06-03 20:24:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780659092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:49,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:24:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484460234] [2024-06-03 20:24:49,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:49,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:24:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:24:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:24:49,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:49,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 623 transitions, 8886 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:49,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:49,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:49,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:51,478 INFO L124 PetriNetUnfolderBase]: 4033/6413 cut-off events. [2024-06-03 20:24:51,478 INFO L125 PetriNetUnfolderBase]: For 1366049/1366049 co-relation queries the response was YES. [2024-06-03 20:24:51,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60969 conditions, 6413 events. 4033/6413 cut-off events. For 1366049/1366049 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39614 event pairs, 780 based on Foata normal form. 24/6434 useless extension candidates. Maximal degree in co-relation 60770. Up to 5498 conditions per place. [2024-06-03 20:24:51,578 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 481 selfloop transitions, 163 changer transitions 0/649 dead transitions. [2024-06-03 20:24:51,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 649 transitions, 10646 flow [2024-06-03 20:24:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:24:51,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 20:24:51,579 INFO L175 Difference]: Start difference. First operand has 424 places, 623 transitions, 8886 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:24:51,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 649 transitions, 10646 flow [2024-06-03 20:24:57,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 649 transitions, 10391 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 20:24:57,105 INFO L231 Difference]: Finished difference. Result has 426 places, 626 transitions, 9089 flow [2024-06-03 20:24:57,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8631, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9089, PETRI_PLACES=426, PETRI_TRANSITIONS=626} [2024-06-03 20:24:57,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-03 20:24:57,105 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 626 transitions, 9089 flow [2024-06-03 20:24:57,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:57,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:57,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:57,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:24:57,106 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:57,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:57,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1747218071, now seen corresponding path program 2 times [2024-06-03 20:24:57,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:57,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378481575] [2024-06-03 20:24:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:57,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:57,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:57,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378481575] [2024-06-03 20:24:57,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378481575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:57,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:57,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:57,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042385311] [2024-06-03 20:24:57,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:57,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:57,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:57,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:24:57,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 626 transitions, 9089 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:57,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:57,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:24:57,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:59,648 INFO L124 PetriNetUnfolderBase]: 4233/6706 cut-off events. [2024-06-03 20:24:59,649 INFO L125 PetriNetUnfolderBase]: For 1527984/1527984 co-relation queries the response was YES. [2024-06-03 20:24:59,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67410 conditions, 6706 events. 4233/6706 cut-off events. For 1527984/1527984 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 41453 event pairs, 830 based on Foata normal form. 16/6719 useless extension candidates. Maximal degree in co-relation 67210. Up to 5434 conditions per place. [2024-06-03 20:24:59,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 172 changer transitions 0/658 dead transitions. [2024-06-03 20:24:59,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 658 transitions, 11255 flow [2024-06-03 20:24:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:24:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:24:59,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:24:59,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:24:59,745 INFO L175 Difference]: Start difference. First operand has 426 places, 626 transitions, 9089 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:24:59,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 658 transitions, 11255 flow [2024-06-03 20:25:05,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 658 transitions, 10843 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:05,222 INFO L231 Difference]: Finished difference. Result has 428 places, 630 transitions, 9230 flow [2024-06-03 20:25:05,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8677, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9230, PETRI_PLACES=428, PETRI_TRANSITIONS=630} [2024-06-03 20:25:05,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-03 20:25:05,222 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 630 transitions, 9230 flow [2024-06-03 20:25:05,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:05,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:05,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:05,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:25:05,223 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:05,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:05,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1741496339, now seen corresponding path program 5 times [2024-06-03 20:25:05,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:05,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214811687] [2024-06-03 20:25:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:05,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:06,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:06,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214811687] [2024-06-03 20:25:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214811687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:06,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:06,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042465243] [2024-06-03 20:25:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:06,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:06,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:06,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:06,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 630 transitions, 9230 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:06,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:06,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:06,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:07,944 INFO L124 PetriNetUnfolderBase]: 4223/6700 cut-off events. [2024-06-03 20:25:07,944 INFO L125 PetriNetUnfolderBase]: For 1405507/1405507 co-relation queries the response was YES. [2024-06-03 20:25:08,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66224 conditions, 6700 events. 4223/6700 cut-off events. For 1405507/1405507 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 41640 event pairs, 866 based on Foata normal form. 4/6701 useless extension candidates. Maximal degree in co-relation 66023. Up to 5872 conditions per place. [2024-06-03 20:25:08,050 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 150 changer transitions 0/652 dead transitions. [2024-06-03 20:25:08,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 652 transitions, 10976 flow [2024-06-03 20:25:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:25:08,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:25:08,052 INFO L175 Difference]: Start difference. First operand has 428 places, 630 transitions, 9230 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:25:08,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 652 transitions, 10976 flow [2024-06-03 20:25:14,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 652 transitions, 10678 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:14,283 INFO L231 Difference]: Finished difference. Result has 432 places, 633 transitions, 9372 flow [2024-06-03 20:25:14,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9372, PETRI_PLACES=432, PETRI_TRANSITIONS=633} [2024-06-03 20:25:14,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-03 20:25:14,284 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 633 transitions, 9372 flow [2024-06-03 20:25:14,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:14,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:14,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:25:14,284 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:14,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1741646441, now seen corresponding path program 3 times [2024-06-03 20:25:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801216935] [2024-06-03 20:25:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:15,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:15,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801216935] [2024-06-03 20:25:15,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801216935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:15,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:15,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:15,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607107951] [2024-06-03 20:25:15,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:15,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:15,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:15,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 633 transitions, 9372 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:15,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:15,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:15,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:17,049 INFO L124 PetriNetUnfolderBase]: 4315/6832 cut-off events. [2024-06-03 20:25:17,049 INFO L125 PetriNetUnfolderBase]: For 1564519/1564519 co-relation queries the response was YES. [2024-06-03 20:25:17,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 6832 events. 4315/6832 cut-off events. For 1564519/1564519 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 42421 event pairs, 866 based on Foata normal form. 20/6849 useless extension candidates. Maximal degree in co-relation 67612. Up to 5916 conditions per place. [2024-06-03 20:25:17,157 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 156 changer transitions 0/664 dead transitions. [2024-06-03 20:25:17,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 664 transitions, 11236 flow [2024-06-03 20:25:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:25:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:25:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 20:25:17,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-03 20:25:17,158 INFO L175 Difference]: Start difference. First operand has 432 places, 633 transitions, 9372 flow. Second operand 10 states and 177 transitions. [2024-06-03 20:25:17,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 664 transitions, 11236 flow [2024-06-03 20:25:23,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 664 transitions, 10818 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:23,183 INFO L231 Difference]: Finished difference. Result has 436 places, 639 transitions, 9467 flow [2024-06-03 20:25:23,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9467, PETRI_PLACES=436, PETRI_TRANSITIONS=639} [2024-06-03 20:25:23,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 20:25:23,183 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 639 transitions, 9467 flow [2024-06-03 20:25:23,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:23,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:23,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:23,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:25:23,184 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:23,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1741492619, now seen corresponding path program 6 times [2024-06-03 20:25:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:23,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980737448] [2024-06-03 20:25:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:23,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:24,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980737448] [2024-06-03 20:25:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980737448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:24,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144997478] [2024-06-03 20:25:24,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:24,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:24,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:24,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 639 transitions, 9467 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:24,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:24,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:24,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:26,138 INFO L124 PetriNetUnfolderBase]: 4419/6994 cut-off events. [2024-06-03 20:25:26,138 INFO L125 PetriNetUnfolderBase]: For 1579588/1579588 co-relation queries the response was YES. [2024-06-03 20:25:26,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71398 conditions, 6994 events. 4419/6994 cut-off events. For 1579588/1579588 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43604 event pairs, 881 based on Foata normal form. 4/6995 useless extension candidates. Maximal degree in co-relation 71193. Up to 5902 conditions per place. [2024-06-03 20:25:26,242 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 155 changer transitions 0/669 dead transitions. [2024-06-03 20:25:26,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 669 transitions, 11673 flow [2024-06-03 20:25:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:25:26,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 20:25:26,244 INFO L175 Difference]: Start difference. First operand has 436 places, 639 transitions, 9467 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:25:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 669 transitions, 11673 flow [2024-06-03 20:25:31,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 669 transitions, 11275 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:31,903 INFO L231 Difference]: Finished difference. Result has 439 places, 645 transitions, 9670 flow [2024-06-03 20:25:31,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9670, PETRI_PLACES=439, PETRI_TRANSITIONS=645} [2024-06-03 20:25:31,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 20:25:31,904 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 645 transitions, 9670 flow [2024-06-03 20:25:31,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:31,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:31,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:31,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:25:31,904 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:31,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1747008821, now seen corresponding path program 4 times [2024-06-03 20:25:31,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:31,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315255494] [2024-06-03 20:25:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:31,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:32,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315255494] [2024-06-03 20:25:32,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315255494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:32,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:32,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89506560] [2024-06-03 20:25:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:32,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:32,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:32,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 645 transitions, 9670 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:32,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:32,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:32,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:34,530 INFO L124 PetriNetUnfolderBase]: 4439/7030 cut-off events. [2024-06-03 20:25:34,530 INFO L125 PetriNetUnfolderBase]: For 1672660/1672660 co-relation queries the response was YES. [2024-06-03 20:25:34,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70487 conditions, 7030 events. 4439/7030 cut-off events. For 1672660/1672660 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 43855 event pairs, 882 based on Foata normal form. 20/7047 useless extension candidates. Maximal degree in co-relation 70280. Up to 6014 conditions per place. [2024-06-03 20:25:34,643 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 161 changer transitions 0/669 dead transitions. [2024-06-03 20:25:34,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 669 transitions, 11200 flow [2024-06-03 20:25:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 20:25:34,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 20:25:34,644 INFO L175 Difference]: Start difference. First operand has 439 places, 645 transitions, 9670 flow. Second operand 9 states and 160 transitions. [2024-06-03 20:25:34,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 669 transitions, 11200 flow [2024-06-03 20:25:40,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 669 transitions, 10857 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:40,638 INFO L231 Difference]: Finished difference. Result has 443 places, 647 transitions, 9775 flow [2024-06-03 20:25:40,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9327, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9775, PETRI_PLACES=443, PETRI_TRANSITIONS=647} [2024-06-03 20:25:40,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-03 20:25:40,639 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 647 transitions, 9775 flow [2024-06-03 20:25:40,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:40,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:40,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:40,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:25:40,640 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:40,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1110974825, now seen corresponding path program 5 times [2024-06-03 20:25:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880513604] [2024-06-03 20:25:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:40,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:41,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:41,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880513604] [2024-06-03 20:25:41,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880513604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:41,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:41,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:41,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183882129] [2024-06-03 20:25:41,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:41,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:41,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:41,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:41,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:41,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 647 transitions, 9775 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:41,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:41,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:41,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:43,324 INFO L124 PetriNetUnfolderBase]: 4639/7329 cut-off events. [2024-06-03 20:25:43,324 INFO L125 PetriNetUnfolderBase]: For 1902291/1902293 co-relation queries the response was YES. [2024-06-03 20:25:43,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77657 conditions, 7329 events. 4639/7329 cut-off events. For 1902291/1902293 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45853 event pairs, 929 based on Foata normal form. 16/7342 useless extension candidates. Maximal degree in co-relation 77448. Up to 5805 conditions per place. [2024-06-03 20:25:43,446 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 274 changer transitions 0/677 dead transitions. [2024-06-03 20:25:43,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 677 transitions, 12007 flow [2024-06-03 20:25:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:43,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:25:43,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 20:25:43,447 INFO L175 Difference]: Start difference. First operand has 443 places, 647 transitions, 9775 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:25:43,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 677 transitions, 12007 flow [2024-06-03 20:25:48,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 677 transitions, 11629 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:48,189 INFO L231 Difference]: Finished difference. Result has 445 places, 651 transitions, 10171 flow [2024-06-03 20:25:48,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10171, PETRI_PLACES=445, PETRI_TRANSITIONS=651} [2024-06-03 20:25:48,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-03 20:25:48,189 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 651 transitions, 10171 flow [2024-06-03 20:25:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:48,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:48,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:48,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:25:48,190 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:48,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1110982265, now seen corresponding path program 6 times [2024-06-03 20:25:48,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:48,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394824774] [2024-06-03 20:25:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:48,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:49,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:49,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394824774] [2024-06-03 20:25:49,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394824774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:49,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:49,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:49,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546780701] [2024-06-03 20:25:49,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:49,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:49,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:49,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 651 transitions, 10171 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:49,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:49,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:50,905 INFO L124 PetriNetUnfolderBase]: 4649/7348 cut-off events. [2024-06-03 20:25:50,906 INFO L125 PetriNetUnfolderBase]: For 1891214/1891216 co-relation queries the response was YES. [2024-06-03 20:25:50,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76407 conditions, 7348 events. 4649/7348 cut-off events. For 1891214/1891216 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46037 event pairs, 957 based on Foata normal form. 24/7369 useless extension candidates. Maximal degree in co-relation 76197. Up to 6071 conditions per place. [2024-06-03 20:25:51,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 269 changer transitions 0/675 dead transitions. [2024-06-03 20:25:51,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 675 transitions, 12007 flow [2024-06-03 20:25:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:25:51,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:25:51,029 INFO L175 Difference]: Start difference. First operand has 445 places, 651 transitions, 10171 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:25:51,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 675 transitions, 12007 flow [2024-06-03 20:25:56,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 675 transitions, 11379 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:25:56,624 INFO L231 Difference]: Finished difference. Result has 448 places, 654 transitions, 10235 flow [2024-06-03 20:25:56,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9549, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10235, PETRI_PLACES=448, PETRI_TRANSITIONS=654} [2024-06-03 20:25:56,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-03 20:25:56,624 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 654 transitions, 10235 flow [2024-06-03 20:25:56,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:56,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:56,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:56,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:25:56,625 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:56,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1101778055, now seen corresponding path program 7 times [2024-06-03 20:25:56,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:56,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456611872] [2024-06-03 20:25:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:57,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456611872] [2024-06-03 20:25:57,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456611872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:57,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:57,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:57,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122728519] [2024-06-03 20:25:57,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:57,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:57,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:57,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:25:57,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 654 transitions, 10235 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:57,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:57,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:25:57,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:59,657 INFO L124 PetriNetUnfolderBase]: 4823/7626 cut-off events. [2024-06-03 20:25:59,657 INFO L125 PetriNetUnfolderBase]: For 2024656/2024658 co-relation queries the response was YES. [2024-06-03 20:25:59,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81861 conditions, 7626 events. 4823/7626 cut-off events. For 2024656/2024658 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 47902 event pairs, 946 based on Foata normal form. 16/7639 useless extension candidates. Maximal degree in co-relation 81650. Up to 5237 conditions per place. [2024-06-03 20:25:59,798 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 304 changer transitions 0/684 dead transitions. [2024-06-03 20:25:59,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 684 transitions, 12493 flow [2024-06-03 20:25:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:25:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:25:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:25:59,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:25:59,800 INFO L175 Difference]: Start difference. First operand has 448 places, 654 transitions, 10235 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:25:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 684 transitions, 12493 flow [2024-06-03 20:26:05,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 684 transitions, 11857 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:05,293 INFO L231 Difference]: Finished difference. Result has 450 places, 658 transitions, 10436 flow [2024-06-03 20:26:05,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9599, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10436, PETRI_PLACES=450, PETRI_TRANSITIONS=658} [2024-06-03 20:26:05,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-03 20:26:05,293 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 658 transitions, 10436 flow [2024-06-03 20:26:05,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:05,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:05,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:26:05,294 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:05,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:05,294 INFO L85 PathProgramCache]: Analyzing trace with hash -667006003, now seen corresponding path program 7 times [2024-06-03 20:26:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:05,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515822375] [2024-06-03 20:26:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:06,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:06,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515822375] [2024-06-03 20:26:06,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515822375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:06,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430881069] [2024-06-03 20:26:06,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:06,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:06,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:06,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 658 transitions, 10436 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:06,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:06,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:06,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:08,185 INFO L124 PetriNetUnfolderBase]: 4839/7646 cut-off events. [2024-06-03 20:26:08,186 INFO L125 PetriNetUnfolderBase]: For 1940836/1940838 co-relation queries the response was YES. [2024-06-03 20:26:08,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82005 conditions, 7646 events. 4839/7646 cut-off events. For 1940836/1940838 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48218 event pairs, 1028 based on Foata normal form. 4/7647 useless extension candidates. Maximal degree in co-relation 81793. Up to 6445 conditions per place. [2024-06-03 20:26:08,313 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 432 selfloop transitions, 242 changer transitions 0/679 dead transitions. [2024-06-03 20:26:08,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 679 transitions, 12528 flow [2024-06-03 20:26:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:26:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:26:08,315 INFO L175 Difference]: Start difference. First operand has 450 places, 658 transitions, 10436 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:26:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 679 transitions, 12528 flow [2024-06-03 20:26:13,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 679 transitions, 12076 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:13,394 INFO L231 Difference]: Finished difference. Result has 454 places, 661 transitions, 10624 flow [2024-06-03 20:26:13,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10624, PETRI_PLACES=454, PETRI_TRANSITIONS=661} [2024-06-03 20:26:13,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-03 20:26:13,395 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 661 transitions, 10624 flow [2024-06-03 20:26:13,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:13,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:13,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:13,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:26:13,395 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:13,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 151951977, now seen corresponding path program 8 times [2024-06-03 20:26:13,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:13,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406732012] [2024-06-03 20:26:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:13,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:14,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:14,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406732012] [2024-06-03 20:26:14,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406732012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:14,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:14,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:14,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174922050] [2024-06-03 20:26:14,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:14,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:14,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:14,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 661 transitions, 10624 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:14,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:14,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:14,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:16,422 INFO L124 PetriNetUnfolderBase]: 4931/7805 cut-off events. [2024-06-03 20:26:16,422 INFO L125 PetriNetUnfolderBase]: For 2114370/2114372 co-relation queries the response was YES. [2024-06-03 20:26:16,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83796 conditions, 7805 events. 4931/7805 cut-off events. For 2114370/2114372 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49430 event pairs, 1036 based on Foata normal form. 20/7822 useless extension candidates. Maximal degree in co-relation 83582. Up to 6481 conditions per place. [2024-06-03 20:26:16,563 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 439 selfloop transitions, 247 changer transitions 0/691 dead transitions. [2024-06-03 20:26:16,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 691 transitions, 12814 flow [2024-06-03 20:26:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:26:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:26:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 20:26:16,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-03 20:26:16,565 INFO L175 Difference]: Start difference. First operand has 454 places, 661 transitions, 10624 flow. Second operand 10 states and 181 transitions. [2024-06-03 20:26:16,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 691 transitions, 12814 flow [2024-06-03 20:26:22,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 691 transitions, 12194 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:22,405 INFO L231 Difference]: Finished difference. Result has 458 places, 667 transitions, 10692 flow [2024-06-03 20:26:22,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10010, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10692, PETRI_PLACES=458, PETRI_TRANSITIONS=667} [2024-06-03 20:26:22,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-03 20:26:22,406 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 667 transitions, 10692 flow [2024-06-03 20:26:22,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:22,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:22,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:22,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:26:22,406 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:22,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:22,407 INFO L85 PathProgramCache]: Analyzing trace with hash 157516167, now seen corresponding path program 9 times [2024-06-03 20:26:22,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:22,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001972975] [2024-06-03 20:26:22,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:22,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:23,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:23,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001972975] [2024-06-03 20:26:23,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001972975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:23,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:23,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:23,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863749286] [2024-06-03 20:26:23,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:23,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:23,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:23,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:23,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 667 transitions, 10692 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:23,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:23,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:23,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:25,349 INFO L124 PetriNetUnfolderBase]: 4993/7898 cut-off events. [2024-06-03 20:26:25,349 INFO L125 PetriNetUnfolderBase]: For 2159478/2159480 co-relation queries the response was YES. [2024-06-03 20:26:25,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84598 conditions, 7898 events. 4993/7898 cut-off events. For 2159478/2159480 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 50026 event pairs, 1073 based on Foata normal form. 24/7919 useless extension candidates. Maximal degree in co-relation 84382. Up to 6587 conditions per place. [2024-06-03 20:26:25,476 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 450 selfloop transitions, 237 changer transitions 0/692 dead transitions. [2024-06-03 20:26:25,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 692 transitions, 12862 flow [2024-06-03 20:26:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:26:25,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:26:25,477 INFO L175 Difference]: Start difference. First operand has 458 places, 667 transitions, 10692 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:26:25,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 692 transitions, 12862 flow [2024-06-03 20:26:30,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 692 transitions, 12283 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:30,202 INFO L231 Difference]: Finished difference. Result has 460 places, 670 transitions, 10755 flow [2024-06-03 20:26:30,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10755, PETRI_PLACES=460, PETRI_TRANSITIONS=670} [2024-06-03 20:26:30,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-03 20:26:30,203 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 670 transitions, 10755 flow [2024-06-03 20:26:30,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:30,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:30,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:26:30,203 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:30,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash 151798155, now seen corresponding path program 8 times [2024-06-03 20:26:30,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:30,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038780715] [2024-06-03 20:26:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:30,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:31,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:31,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038780715] [2024-06-03 20:26:31,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038780715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:31,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:31,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:31,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004459304] [2024-06-03 20:26:31,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:31,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:31,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:31,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:31,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:31,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:31,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 670 transitions, 10755 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:31,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:31,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:33,280 INFO L124 PetriNetUnfolderBase]: 5058/7997 cut-off events. [2024-06-03 20:26:33,280 INFO L125 PetriNetUnfolderBase]: For 2062671/2062673 co-relation queries the response was YES. [2024-06-03 20:26:33,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86098 conditions, 7997 events. 5058/7997 cut-off events. For 2062671/2062673 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 50777 event pairs, 1062 based on Foata normal form. 4/7998 useless extension candidates. Maximal degree in co-relation 85881. Up to 6388 conditions per place. [2024-06-03 20:26:33,418 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 249 changer transitions 0/699 dead transitions. [2024-06-03 20:26:33,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 699 transitions, 13349 flow [2024-06-03 20:26:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:26:33,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:26:33,419 INFO L175 Difference]: Start difference. First operand has 460 places, 670 transitions, 10755 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:26:33,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 699 transitions, 13349 flow [2024-06-03 20:26:39,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 699 transitions, 12757 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:39,188 INFO L231 Difference]: Finished difference. Result has 463 places, 676 transitions, 10987 flow [2024-06-03 20:26:39,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10163, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10987, PETRI_PLACES=463, PETRI_TRANSITIONS=676} [2024-06-03 20:26:39,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-03 20:26:39,189 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 676 transitions, 10987 flow [2024-06-03 20:26:39,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:39,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:39,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:39,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:26:39,189 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:39,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:39,189 INFO L85 PathProgramCache]: Analyzing trace with hash 157523607, now seen corresponding path program 10 times [2024-06-03 20:26:39,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:39,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543358710] [2024-06-03 20:26:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:39,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:39,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:39,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543358710] [2024-06-03 20:26:39,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543358710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:39,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:39,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797453256] [2024-06-03 20:26:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:39,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:39,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:40,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:40,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 676 transitions, 10987 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:40,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:40,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:40,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:42,109 INFO L124 PetriNetUnfolderBase]: 5114/8101 cut-off events. [2024-06-03 20:26:42,109 INFO L125 PetriNetUnfolderBase]: For 2207689/2207691 co-relation queries the response was YES. [2024-06-03 20:26:42,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86717 conditions, 8101 events. 5114/8101 cut-off events. For 2207689/2207691 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 51568 event pairs, 1090 based on Foata normal form. 16/8114 useless extension candidates. Maximal degree in co-relation 86498. Up to 6456 conditions per place. [2024-06-03 20:26:42,249 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 244 changer transitions 0/704 dead transitions. [2024-06-03 20:26:42,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 704 transitions, 13465 flow [2024-06-03 20:26:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:26:42,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:26:42,250 INFO L175 Difference]: Start difference. First operand has 463 places, 676 transitions, 10987 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:26:42,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 704 transitions, 13465 flow [2024-06-03 20:26:48,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 704 transitions, 12980 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:48,871 INFO L231 Difference]: Finished difference. Result has 467 places, 678 transitions, 11121 flow [2024-06-03 20:26:48,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10508, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11121, PETRI_PLACES=467, PETRI_TRANSITIONS=678} [2024-06-03 20:26:48,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-03 20:26:48,871 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 678 transitions, 11121 flow [2024-06-03 20:26:48,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:48,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:48,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:48,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:26:48,872 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:48,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash 157314357, now seen corresponding path program 11 times [2024-06-03 20:26:48,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:48,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833861303] [2024-06-03 20:26:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:48,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833861303] [2024-06-03 20:26:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833861303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:49,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359857963] [2024-06-03 20:26:49,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:50,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:50,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 678 transitions, 11121 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:50,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:50,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:50,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:52,380 INFO L124 PetriNetUnfolderBase]: 5134/8110 cut-off events. [2024-06-03 20:26:52,381 INFO L125 PetriNetUnfolderBase]: For 2207430/2207432 co-relation queries the response was YES. [2024-06-03 20:26:52,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86316 conditions, 8110 events. 5134/8110 cut-off events. For 2207430/2207432 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 51578 event pairs, 1094 based on Foata normal form. 20/8127 useless extension candidates. Maximal degree in co-relation 86095. Up to 7129 conditions per place. [2024-06-03 20:26:52,513 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 530 selfloop transitions, 169 changer transitions 0/704 dead transitions. [2024-06-03 20:26:52,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 704 transitions, 12772 flow [2024-06-03 20:26:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:26:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:26:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 20:26:52,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-03 20:26:52,515 INFO L175 Difference]: Start difference. First operand has 467 places, 678 transitions, 11121 flow. Second operand 10 states and 176 transitions. [2024-06-03 20:26:52,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 704 transitions, 12772 flow [2024-06-03 20:26:58,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 704 transitions, 11914 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-03 20:26:58,623 INFO L231 Difference]: Finished difference. Result has 469 places, 682 transitions, 10780 flow [2024-06-03 20:26:58,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10283, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10780, PETRI_PLACES=469, PETRI_TRANSITIONS=682} [2024-06-03 20:26:58,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-03 20:26:58,624 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 682 transitions, 10780 flow [2024-06-03 20:26:58,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:58,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:58,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:26:58,625 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:58,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2142037003, now seen corresponding path program 1 times [2024-06-03 20:26:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:58,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848930123] [2024-06-03 20:26:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:59,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:59,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848930123] [2024-06-03 20:26:59,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848930123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:59,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:59,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:59,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866567978] [2024-06-03 20:26:59,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:59,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:59,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:59,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:26:59,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 682 transitions, 10780 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:59,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:59,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:26:59,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:01,376 INFO L124 PetriNetUnfolderBase]: 5144/8124 cut-off events. [2024-06-03 20:27:01,377 INFO L125 PetriNetUnfolderBase]: For 2029806/2029806 co-relation queries the response was YES. [2024-06-03 20:27:01,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84535 conditions, 8124 events. 5144/8124 cut-off events. For 2029806/2029806 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 51639 event pairs, 1068 based on Foata normal form. 2/8125 useless extension candidates. Maximal degree in co-relation 84314. Up to 7697 conditions per place. [2024-06-03 20:27:01,517 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 654 selfloop transitions, 62 changer transitions 0/721 dead transitions. [2024-06-03 20:27:01,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 721 transitions, 12495 flow [2024-06-03 20:27:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:27:01,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:27:01,518 INFO L175 Difference]: Start difference. First operand has 469 places, 682 transitions, 10780 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:27:01,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 721 transitions, 12495 flow [2024-06-03 20:27:07,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 721 transitions, 12034 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-06-03 20:27:07,182 INFO L231 Difference]: Finished difference. Result has 469 places, 692 transitions, 10632 flow [2024-06-03 20:27:07,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10319, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10632, PETRI_PLACES=469, PETRI_TRANSITIONS=692} [2024-06-03 20:27:07,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-03 20:27:07,183 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 692 transitions, 10632 flow [2024-06-03 20:27:07,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:07,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:07,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:07,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:27:07,183 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:07,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 684928047, now seen corresponding path program 2 times [2024-06-03 20:27:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:07,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208652216] [2024-06-03 20:27:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:07,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:07,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:07,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208652216] [2024-06-03 20:27:07,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208652216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:07,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:07,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:07,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460985371] [2024-06-03 20:27:07,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:07,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:07,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:27:07,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 692 transitions, 10632 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:07,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:07,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:27:07,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:10,603 INFO L124 PetriNetUnfolderBase]: 5154/8133 cut-off events. [2024-06-03 20:27:10,603 INFO L125 PetriNetUnfolderBase]: For 2047432/2047434 co-relation queries the response was YES. [2024-06-03 20:27:10,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84630 conditions, 8133 events. 5154/8133 cut-off events. For 2047432/2047434 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51665 event pairs, 994 based on Foata normal form. 2/8134 useless extension candidates. Maximal degree in co-relation 84409. Up to 7388 conditions per place. [2024-06-03 20:27:10,742 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 604 selfloop transitions, 122 changer transitions 0/731 dead transitions. [2024-06-03 20:27:10,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 731 transitions, 12377 flow [2024-06-03 20:27:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 20:27:10,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-03 20:27:10,743 INFO L175 Difference]: Start difference. First operand has 469 places, 692 transitions, 10632 flow. Second operand 9 states and 164 transitions. [2024-06-03 20:27:10,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 731 transitions, 12377 flow [2024-06-03 20:27:16,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 731 transitions, 12180 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 20:27:16,759 INFO L231 Difference]: Finished difference. Result has 475 places, 701 transitions, 10881 flow [2024-06-03 20:27:16,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10435, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10881, PETRI_PLACES=475, PETRI_TRANSITIONS=701} [2024-06-03 20:27:16,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:27:16,759 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 701 transitions, 10881 flow [2024-06-03 20:27:16,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:16,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:16,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:16,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:27:16,760 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:16,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:16,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1640756981, now seen corresponding path program 3 times [2024-06-03 20:27:16,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:16,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557195215] [2024-06-03 20:27:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:16,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557195215] [2024-06-03 20:27:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557195215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:17,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:17,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408368599] [2024-06-03 20:27:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:17,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:17,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:27:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 701 transitions, 10881 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:17,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:17,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:27:17,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:19,952 INFO L124 PetriNetUnfolderBase]: 5180/8165 cut-off events. [2024-06-03 20:27:19,953 INFO L125 PetriNetUnfolderBase]: For 2105128/2105130 co-relation queries the response was YES. [2024-06-03 20:27:20,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87247 conditions, 8165 events. 5180/8165 cut-off events. For 2105128/2105130 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51886 event pairs, 991 based on Foata normal form. 2/8166 useless extension candidates. Maximal degree in co-relation 87023. Up to 7387 conditions per place. [2024-06-03 20:27:20,083 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 600 selfloop transitions, 131 changer transitions 0/736 dead transitions. [2024-06-03 20:27:20,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 736 transitions, 13026 flow [2024-06-03 20:27:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:20,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 20:27:20,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-03 20:27:20,085 INFO L175 Difference]: Start difference. First operand has 475 places, 701 transitions, 10881 flow. Second operand 9 states and 164 transitions. [2024-06-03 20:27:20,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 736 transitions, 13026 flow [2024-06-03 20:27:27,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 736 transitions, 12744 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-03 20:27:27,124 INFO L231 Difference]: Finished difference. Result has 480 places, 707 transitions, 11129 flow [2024-06-03 20:27:27,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10599, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11129, PETRI_PLACES=480, PETRI_TRANSITIONS=707} [2024-06-03 20:27:27,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-03 20:27:27,125 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 707 transitions, 11129 flow [2024-06-03 20:27:27,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:27,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:27,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:27,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:27:27,125 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:27,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash 485626257, now seen corresponding path program 4 times [2024-06-03 20:27:27,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:27,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371730678] [2024-06-03 20:27:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:27,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:27,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371730678] [2024-06-03 20:27:27,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371730678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:27,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:27,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366404807] [2024-06-03 20:27:27,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:27,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:27,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:27,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:27,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:27:27,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 707 transitions, 11129 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:27,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:27,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:27:27,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:30,465 INFO L124 PetriNetUnfolderBase]: 5174/8158 cut-off events. [2024-06-03 20:27:30,465 INFO L125 PetriNetUnfolderBase]: For 2114767/2114769 co-relation queries the response was YES. [2024-06-03 20:27:30,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87442 conditions, 8158 events. 5174/8158 cut-off events. For 2114767/2114769 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51778 event pairs, 1005 based on Foata normal form. 2/8159 useless extension candidates. Maximal degree in co-relation 87217. Up to 7416 conditions per place. [2024-06-03 20:27:30,594 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 609 selfloop transitions, 121 changer transitions 0/735 dead transitions. [2024-06-03 20:27:30,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 735 transitions, 12720 flow [2024-06-03 20:27:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:27:30,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:27:30,595 INFO L175 Difference]: Start difference. First operand has 480 places, 707 transitions, 11129 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:27:30,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 735 transitions, 12720 flow [2024-06-03 20:27:36,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 735 transitions, 12348 flow, removed 116 selfloop flow, removed 5 redundant places. [2024-06-03 20:27:36,911 INFO L231 Difference]: Finished difference. Result has 484 places, 707 transitions, 11009 flow [2024-06-03 20:27:36,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10761, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11009, PETRI_PLACES=484, PETRI_TRANSITIONS=707} [2024-06-03 20:27:36,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-03 20:27:36,912 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 707 transitions, 11009 flow [2024-06-03 20:27:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:36,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:36,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:36,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:27:36,912 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:36,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash 469293137, now seen corresponding path program 5 times [2024-06-03 20:27:36,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:36,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148266049] [2024-06-03 20:27:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:37,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:37,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148266049] [2024-06-03 20:27:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148266049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:37,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:37,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777618592] [2024-06-03 20:27:37,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:37,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:37,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:37,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:27:37,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 707 transitions, 11009 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:37,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:37,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:27:37,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:40,278 INFO L124 PetriNetUnfolderBase]: 5192/8185 cut-off events. [2024-06-03 20:27:40,278 INFO L125 PetriNetUnfolderBase]: For 2154050/2154052 co-relation queries the response was YES. [2024-06-03 20:27:40,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87736 conditions, 8185 events. 5192/8185 cut-off events. For 2154050/2154052 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51958 event pairs, 1009 based on Foata normal form. 2/8186 useless extension candidates. Maximal degree in co-relation 87509. Up to 7420 conditions per place. [2024-06-03 20:27:40,514 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 604 selfloop transitions, 131 changer transitions 0/740 dead transitions. [2024-06-03 20:27:40,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 740 transitions, 13160 flow [2024-06-03 20:27:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:27:40,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:27:40,515 INFO L175 Difference]: Start difference. First operand has 484 places, 707 transitions, 11009 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:27:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 740 transitions, 13160 flow [2024-06-03 20:27:46,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 740 transitions, 12874 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:27:46,800 INFO L231 Difference]: Finished difference. Result has 485 places, 713 transitions, 11265 flow [2024-06-03 20:27:46,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11265, PETRI_PLACES=485, PETRI_TRANSITIONS=713} [2024-06-03 20:27:46,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-03 20:27:46,801 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 713 transitions, 11265 flow [2024-06-03 20:27:46,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:46,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:46,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:46,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:27:46,801 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:46,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 485746413, now seen corresponding path program 1 times [2024-06-03 20:27:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:46,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294431460] [2024-06-03 20:27:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:47,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:47,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294431460] [2024-06-03 20:27:47,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294431460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:47,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:27:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131070469] [2024-06-03 20:27:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:47,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:27:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:27:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:27:47,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:27:47,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 713 transitions, 11265 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:47,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:47,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:27:47,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:49,854 INFO L124 PetriNetUnfolderBase]: 5197/8192 cut-off events. [2024-06-03 20:27:49,854 INFO L125 PetriNetUnfolderBase]: For 2177638/2177638 co-relation queries the response was YES. [2024-06-03 20:27:49,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88479 conditions, 8192 events. 5197/8192 cut-off events. For 2177638/2177638 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 52075 event pairs, 996 based on Foata normal form. 1/8189 useless extension candidates. Maximal degree in co-relation 88252. Up to 7744 conditions per place. [2024-06-03 20:27:49,988 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 662 selfloop transitions, 67 changer transitions 0/734 dead transitions. [2024-06-03 20:27:49,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 734 transitions, 12883 flow [2024-06-03 20:27:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:27:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:27:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 20:27:49,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-03 20:27:49,989 INFO L175 Difference]: Start difference. First operand has 485 places, 713 transitions, 11265 flow. Second operand 8 states and 135 transitions. [2024-06-03 20:27:49,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 734 transitions, 12883 flow [2024-06-03 20:27:56,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 734 transitions, 12581 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-03 20:27:56,865 INFO L231 Difference]: Finished difference. Result has 488 places, 716 transitions, 11194 flow [2024-06-03 20:27:56,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10963, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11194, PETRI_PLACES=488, PETRI_TRANSITIONS=716} [2024-06-03 20:27:56,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-03 20:27:56,865 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 716 transitions, 11194 flow [2024-06-03 20:27:56,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:56,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:56,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:56,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:27:56,866 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:56,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:56,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1742563585, now seen corresponding path program 6 times [2024-06-03 20:27:56,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:56,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939597464] [2024-06-03 20:27:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:56,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:57,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:57,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939597464] [2024-06-03 20:27:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939597464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:57,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279412757] [2024-06-03 20:27:57,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:57,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:57,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:27:57,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 716 transitions, 11194 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:57,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:27:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:00,141 INFO L124 PetriNetUnfolderBase]: 5231/8249 cut-off events. [2024-06-03 20:28:00,142 INFO L125 PetriNetUnfolderBase]: For 2253396/2253398 co-relation queries the response was YES. [2024-06-03 20:28:00,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89902 conditions, 8249 events. 5231/8249 cut-off events. For 2253396/2253398 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 52440 event pairs, 998 based on Foata normal form. 2/8250 useless extension candidates. Maximal degree in co-relation 89673. Up to 7387 conditions per place. [2024-06-03 20:28:00,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 152 changer transitions 0/751 dead transitions. [2024-06-03 20:28:00,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 751 transitions, 13813 flow [2024-06-03 20:28:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:28:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:28:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:28:00,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:28:00,277 INFO L175 Difference]: Start difference. First operand has 488 places, 716 transitions, 11194 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:28:00,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 751 transitions, 13813 flow [2024-06-03 20:28:06,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 751 transitions, 13618 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:28:06,972 INFO L231 Difference]: Finished difference. Result has 491 places, 725 transitions, 11735 flow [2024-06-03 20:28:06,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10999, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11735, PETRI_PLACES=491, PETRI_TRANSITIONS=725} [2024-06-03 20:28:06,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-03 20:28:06,973 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 725 transitions, 11735 flow [2024-06-03 20:28:06,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:06,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:06,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:06,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:28:06,973 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:06,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2075228079, now seen corresponding path program 2 times [2024-06-03 20:28:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770944274] [2024-06-03 20:28:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:07,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:07,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770944274] [2024-06-03 20:28:07,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770944274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:07,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:07,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819335786] [2024-06-03 20:28:07,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:07,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:07,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:07,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:07,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:07,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:28:07,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 725 transitions, 11735 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:07,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:07,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:28:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:10,117 INFO L124 PetriNetUnfolderBase]: 5236/8241 cut-off events. [2024-06-03 20:28:10,117 INFO L125 PetriNetUnfolderBase]: For 2281754/2281754 co-relation queries the response was YES. [2024-06-03 20:28:10,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90896 conditions, 8241 events. 5236/8241 cut-off events. For 2281754/2281754 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 52325 event pairs, 1021 based on Foata normal form. 1/8237 useless extension candidates. Maximal degree in co-relation 90666. Up to 7735 conditions per place. [2024-06-03 20:28:10,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 645 selfloop transitions, 94 changer transitions 0/744 dead transitions. [2024-06-03 20:28:10,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 744 transitions, 13663 flow [2024-06-03 20:28:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:28:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:28:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 20:28:10,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 20:28:10,269 INFO L175 Difference]: Start difference. First operand has 491 places, 725 transitions, 11735 flow. Second operand 8 states and 138 transitions. [2024-06-03 20:28:10,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 744 transitions, 13663 flow [2024-06-03 20:28:17,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 744 transitions, 13327 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-03 20:28:17,052 INFO L231 Difference]: Finished difference. Result has 495 places, 728 transitions, 11683 flow [2024-06-03 20:28:17,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11683, PETRI_PLACES=495, PETRI_TRANSITIONS=728} [2024-06-03 20:28:17,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-03 20:28:17,052 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 728 transitions, 11683 flow [2024-06-03 20:28:17,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:17,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:17,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:17,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:28:17,053 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:17,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1901208813, now seen corresponding path program 3 times [2024-06-03 20:28:17,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:17,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347686437] [2024-06-03 20:28:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:17,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:17,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:17,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347686437] [2024-06-03 20:28:17,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347686437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:17,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:17,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:17,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122065062] [2024-06-03 20:28:17,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:17,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:17,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:17,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:28:17,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 728 transitions, 11683 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:17,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:17,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:28:17,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:20,175 INFO L124 PetriNetUnfolderBase]: 5241/8253 cut-off events. [2024-06-03 20:28:20,176 INFO L125 PetriNetUnfolderBase]: For 2291246/2291246 co-relation queries the response was YES. [2024-06-03 20:28:20,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90054 conditions, 8253 events. 5241/8253 cut-off events. For 2291246/2291246 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52451 event pairs, 1025 based on Foata normal form. 1/8249 useless extension candidates. Maximal degree in co-relation 89822. Up to 7804 conditions per place. [2024-06-03 20:28:20,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 666 selfloop transitions, 74 changer transitions 0/745 dead transitions. [2024-06-03 20:28:20,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 745 transitions, 13317 flow [2024-06-03 20:28:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:28:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:28:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 20:28:20,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 20:28:20,313 INFO L175 Difference]: Start difference. First operand has 495 places, 728 transitions, 11683 flow. Second operand 7 states and 124 transitions. [2024-06-03 20:28:20,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 745 transitions, 13317 flow [2024-06-03 20:28:28,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 745 transitions, 13028 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:28:28,175 INFO L231 Difference]: Finished difference. Result has 496 places, 731 transitions, 11658 flow [2024-06-03 20:28:28,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11404, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11658, PETRI_PLACES=496, PETRI_TRANSITIONS=731} [2024-06-03 20:28:28,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 20:28:28,177 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 731 transitions, 11658 flow [2024-06-03 20:28:28,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:28,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:28,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:28:28,177 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:28,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1901208627, now seen corresponding path program 7 times [2024-06-03 20:28:28,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:28,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936864320] [2024-06-03 20:28:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:28,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:28,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936864320] [2024-06-03 20:28:28,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936864320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:28,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:28,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:28:28,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434042471] [2024-06-03 20:28:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:28,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:28:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:28:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:28:28,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:28:28,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 731 transitions, 11658 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:28,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:28,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:28:28,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:31,489 INFO L124 PetriNetUnfolderBase]: 5259/8297 cut-off events. [2024-06-03 20:28:31,490 INFO L125 PetriNetUnfolderBase]: For 2343606/2343606 co-relation queries the response was YES. [2024-06-03 20:28:31,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90715 conditions, 8297 events. 5259/8297 cut-off events. For 2343606/2343606 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 52861 event pairs, 1010 based on Foata normal form. 2/8298 useless extension candidates. Maximal degree in co-relation 90482. Up to 7836 conditions per place. [2024-06-03 20:28:31,626 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 691 selfloop transitions, 68 changer transitions 0/764 dead transitions. [2024-06-03 20:28:31,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 764 transitions, 13814 flow [2024-06-03 20:28:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:28:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:28:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 20:28:31,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 20:28:31,628 INFO L175 Difference]: Start difference. First operand has 496 places, 731 transitions, 11658 flow. Second operand 9 states and 159 transitions. [2024-06-03 20:28:31,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 764 transitions, 13814 flow [2024-06-03 20:28:38,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 764 transitions, 13622 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:28:39,005 INFO L231 Difference]: Finished difference. Result has 501 places, 737 transitions, 11862 flow [2024-06-03 20:28:39,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11466, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11862, PETRI_PLACES=501, PETRI_TRANSITIONS=737} [2024-06-03 20:28:39,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-03 20:28:39,005 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 737 transitions, 11862 flow [2024-06-03 20:28:39,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:39,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:28:39,006 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:39,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash 810487347, now seen corresponding path program 8 times [2024-06-03 20:28:39,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:39,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233357305] [2024-06-03 20:28:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:39,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:39,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233357305] [2024-06-03 20:28:39,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233357305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:39,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:39,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:28:39,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85209571] [2024-06-03 20:28:39,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:28:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:28:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:28:39,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:28:39,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 737 transitions, 11862 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:39,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:39,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:28:39,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:42,148 INFO L124 PetriNetUnfolderBase]: 5253/8280 cut-off events. [2024-06-03 20:28:42,148 INFO L125 PetriNetUnfolderBase]: For 2349649/2349651 co-relation queries the response was YES. [2024-06-03 20:28:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90485 conditions, 8280 events. 5253/8280 cut-off events. For 2349649/2349651 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 52709 event pairs, 995 based on Foata normal form. 2/8281 useless extension candidates. Maximal degree in co-relation 90250. Up to 7415 conditions per place. [2024-06-03 20:28:42,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 600 selfloop transitions, 158 changer transitions 0/763 dead transitions. [2024-06-03 20:28:42,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 763 transitions, 14101 flow [2024-06-03 20:28:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:28:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:28:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:28:42,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:28:42,286 INFO L175 Difference]: Start difference. First operand has 501 places, 737 transitions, 11862 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:28:42,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 763 transitions, 14101 flow [2024-06-03 20:28:49,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 763 transitions, 13801 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-03 20:28:49,730 INFO L231 Difference]: Finished difference. Result has 504 places, 737 transitions, 11884 flow [2024-06-03 20:28:49,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11562, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11884, PETRI_PLACES=504, PETRI_TRANSITIONS=737} [2024-06-03 20:28:49,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-03 20:28:49,731 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 737 transitions, 11884 flow [2024-06-03 20:28:49,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:49,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:49,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:49,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:28:49,731 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:49,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 810487533, now seen corresponding path program 4 times [2024-06-03 20:28:49,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:49,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989515292] [2024-06-03 20:28:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:49,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:28:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:28:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:28:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989515292] [2024-06-03 20:28:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989515292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:28:50,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:28:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:28:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105524565] [2024-06-03 20:28:50,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:28:50,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:28:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:28:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:28:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:28:50,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:28:50,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 737 transitions, 11884 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:50,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:28:50,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:28:50,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:28:52,813 INFO L124 PetriNetUnfolderBase]: 5250/8263 cut-off events. [2024-06-03 20:28:52,813 INFO L125 PetriNetUnfolderBase]: For 2354650/2354650 co-relation queries the response was YES. [2024-06-03 20:28:52,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90449 conditions, 8263 events. 5250/8263 cut-off events. For 2354650/2354650 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 52558 event pairs, 1022 based on Foata normal form. 1/8259 useless extension candidates. Maximal degree in co-relation 90213. Up to 7755 conditions per place. [2024-06-03 20:28:52,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 655 selfloop transitions, 92 changer transitions 0/752 dead transitions. [2024-06-03 20:28:52,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 752 transitions, 13438 flow [2024-06-03 20:28:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:28:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:28:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 20:28:52,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:28:52,950 INFO L175 Difference]: Start difference. First operand has 504 places, 737 transitions, 11884 flow. Second operand 8 states and 136 transitions. [2024-06-03 20:28:52,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 752 transitions, 13438 flow [2024-06-03 20:28:59,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 752 transitions, 12919 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-03 20:28:59,698 INFO L231 Difference]: Finished difference. Result has 503 places, 737 transitions, 11557 flow [2024-06-03 20:28:59,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11365, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11557, PETRI_PLACES=503, PETRI_TRANSITIONS=737} [2024-06-03 20:28:59,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-03 20:28:59,699 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 737 transitions, 11557 flow [2024-06-03 20:28:59,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:28:59,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:28:59,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:28:59,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:28:59,699 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:28:59,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:28:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash -503628561, now seen corresponding path program 5 times [2024-06-03 20:28:59,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:28:59,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962938470] [2024-06-03 20:28:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:28:59,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:28:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:29:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:29:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:29:00,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962938470] [2024-06-03 20:29:00,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962938470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:29:00,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:29:00,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:29:00,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613747495] [2024-06-03 20:29:00,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:29:00,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:29:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:29:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:29:00,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:29:00,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 20:29:00,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 737 transitions, 11557 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:29:00,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:29:00,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 20:29:00,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:29:02,861 INFO L124 PetriNetUnfolderBase]: 5268/8297 cut-off events. [2024-06-03 20:29:02,861 INFO L125 PetriNetUnfolderBase]: For 2394967/2394967 co-relation queries the response was YES. [2024-06-03 20:29:02,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90377 conditions, 8297 events. 5268/8297 cut-off events. For 2394967/2394967 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52839 event pairs, 1024 based on Foata normal form. 1/8293 useless extension candidates. Maximal degree in co-relation 90142. Up to 7756 conditions per place. [2024-06-03 20:29:02,996 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 638 selfloop transitions, 119 changer transitions 0/762 dead transitions. [2024-06-03 20:29:02,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 762 transitions, 13637 flow [2024-06-03 20:29:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:29:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:29:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:29:02,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 20:29:02,998 INFO L175 Difference]: Start difference. First operand has 503 places, 737 transitions, 11557 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:29:02,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 762 transitions, 13637 flow