./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_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/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix028_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_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-cde23df-m [2024-06-14 12:14:27,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:14:27,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:14:27,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:14:27,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:14:27,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:14:27,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:14:27,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:14:27,567 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:14:27,570 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:14:27,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:14:27,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:14:27,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:14:27,573 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:14:27,573 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:14:27,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:14:27,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:14:27,574 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:14:27,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:14:27,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:14:27,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:14:27,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:14:27,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:14:27,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:14:27,575 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:14:27,576 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:14:27,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:14:27,576 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:14:27,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:14:27,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:14:27,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:14:27,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:14:27,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:14:27,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:14:27,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:14:27,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:14:27,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:14:27,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:14:27,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:14:27,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:14:27,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:14:27,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:14:27,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:14:27,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:14:27,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:14:27,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:14:27,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:14:27,774 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:14:27,774 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:14:27,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:14:27,887 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:14:27,887 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:14:27,888 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:14:29,046 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:14:29,245 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:14:29,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:14:29,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5421aac/1e6d873f803144e9acf3d702ce92e79c/FLAG6fce62569 [2024-06-14 12:14:29,279 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5421aac/1e6d873f803144e9acf3d702ce92e79c [2024-06-14 12:14:29,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:14:29,281 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:14:29,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:14:29,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:14:29,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:14:29,289 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:27" (1/2) ... [2024-06-14 12:14:29,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a0dbcf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:29, skipping insertion in model container [2024-06-14 12:14:29,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:27" (1/2) ... [2024-06-14 12:14:29,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a4b7526 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:29, skipping insertion in model container [2024-06-14 12:14:29,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:14:29" (2/2) ... [2024-06-14 12:14:29,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a0dbcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29, skipping insertion in model container [2024-06-14 12:14:29,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:14:29" (2/2) ... [2024-06-14 12:14:29,292 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:14:29,364 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:14:29,366 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 12:14:29,366 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 12:14:29,366 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 12:14:29,366 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:14:29,367 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-14 12:14:29,412 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:14:29,735 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:14:29,751 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:14:29,879 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:14:29,954 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:14:29,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29 WrapperNode [2024-06-14 12:14:29,955 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:14:29,956 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:14:29,956 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:14:29,956 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:14:29,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:29,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,043 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-14 12:14:30,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:14:30,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:14:30,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:14:30,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:14:30,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,059 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,071 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]. [2024-06-14 12:14:30,071 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,071 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,084 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:14:30,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:14:30,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:14:30,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:14:30,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (1/1) ... [2024-06-14 12:14:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:14:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:14:30,128 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) [2024-06-14 12:14:30,161 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 [2024-06-14 12:14:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:14:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:14:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:14:30,185 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:14:30,185 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:14:30,186 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:14:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:14:30,186 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:14:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:14:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:14:30,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:14:30,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:14:30,188 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:14:30,298 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:14:30,300 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:14:30,610 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:14:30,610 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:14:30,752 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:14:30,753 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:14:30,753 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:14:30 BoogieIcfgContainer [2024-06-14 12:14:30,754 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:14:30,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:14:30,756 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:14:30,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:14:30,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:27" (1/4) ... [2024-06-14 12:14:30,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ffb242 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:14:30, skipping insertion in model container [2024-06-14 12:14:30,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:14:29" (2/4) ... [2024-06-14 12:14:30,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ffb242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:14:30, skipping insertion in model container [2024-06-14 12:14:30,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:29" (3/4) ... [2024-06-14 12:14:30,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ffb242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:14:30, skipping insertion in model container [2024-06-14 12:14:30,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:14:30" (4/4) ... [2024-06-14 12:14:30,762 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:14:30,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:14:30,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:14:30,776 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:14:30,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:14:30,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:14:30,878 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:14:30,878 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:14:30,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 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. [2024-06-14 12:14:30,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:14:30,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:14:30,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:14:30,899 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;@7b48b62b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:14:30,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:14:30,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:14:30,905 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:14:30,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:14:30,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:30,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:14:30,926 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)] === [2024-06-14 12:14:30,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:30,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1346525187, now seen corresponding path program 1 times [2024-06-14 12:14:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:30,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124144465] [2024-06-14 12:14:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:30,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:31,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:31,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124144465] [2024-06-14 12:14:31,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124144465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:31,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:31,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:14:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161681310] [2024-06-14 12:14:31,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:31,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:14:31,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:14:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:14:32,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:32,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:32,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:32,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:32,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:32,406 INFO L124 PetriNetUnfolderBase]: 1407/2238 cut-off events. [2024-06-14 12:14:32,406 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:14:32,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 2238 events. 1407/2238 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11012 event pairs, 989 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 4429. Up to 2105 conditions per place. [2024-06-14 12:14:32,423 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:14:32,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-14 12:14:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:14:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:14:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 12:14:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 12:14:32,435 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-14 12:14:32,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-14 12:14:32,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:32,440 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:14:32,442 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} [2024-06-14 12:14:32,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:14:32,445 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:14:32,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:32,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:32,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:32,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:14:32,446 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)] === [2024-06-14 12:14:32,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1225515812, now seen corresponding path program 1 times [2024-06-14 12:14:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:32,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411691367] [2024-06-14 12:14:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:33,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:33,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411691367] [2024-06-14 12:14:33,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411691367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:33,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:33,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:14:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258057531] [2024-06-14 12:14:33,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:14:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:14:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:14:33,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:33,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:33,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:33,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:33,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:33,450 INFO L124 PetriNetUnfolderBase]: 1653/2529 cut-off events. [2024-06-14 12:14:33,451 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-14 12:14:33,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 2529 events. 1653/2529 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12025 event pairs, 1038 based on Foata normal form. 3/2519 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-14 12:14:33,463 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 12:14:33,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-14 12:14:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:14:33,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:14:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-14 12:14:33,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 12:14:33,465 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-14 12:14:33,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-14 12:14:33,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:33,466 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:14:33,467 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} [2024-06-14 12:14:33,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:14:33,467 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:14:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:33,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:33,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:14:33,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:33,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 663716578, now seen corresponding path program 1 times [2024-06-14 12:14:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:33,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080808999] [2024-06-14 12:14:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:34,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080808999] [2024-06-14 12:14:34,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080808999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:34,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:34,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:14:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801433380] [2024-06-14 12:14:34,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:34,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:14:34,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:14:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:14:34,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:34,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:34,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:34,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:34,505 INFO L124 PetriNetUnfolderBase]: 1641/2511 cut-off events. [2024-06-14 12:14:34,506 INFO L125 PetriNetUnfolderBase]: For 1294/1294 co-relation queries the response was YES. [2024-06-14 12:14:34,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 2511 events. 1641/2511 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11916 event pairs, 746 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 6272. Up to 2393 conditions per place. [2024-06-14 12:14:34,517 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-14 12:14:34,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 328 flow [2024-06-14 12:14:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-14 12:14:34,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-14 12:14:34,519 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 108 transitions. [2024-06-14 12:14:34,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 328 flow [2024-06-14 12:14:34,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:34,522 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-14 12:14:34,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 12:14:34,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 12:14:34,522 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-14 12:14:34,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:34,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:34,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:14:34,523 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)] === [2024-06-14 12:14:34,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:34,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2118459871, now seen corresponding path program 1 times [2024-06-14 12:14:34,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:34,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145860797] [2024-06-14 12:14:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:34,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:35,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:35,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145860797] [2024-06-14 12:14:35,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145860797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:35,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:35,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142411825] [2024-06-14 12:14:35,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:35,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:35,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:35,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:35,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-14 12:14:35,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:35,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:35,873 INFO L124 PetriNetUnfolderBase]: 1632/2496 cut-off events. [2024-06-14 12:14:35,874 INFO L125 PetriNetUnfolderBase]: For 2395/2395 co-relation queries the response was YES. [2024-06-14 12:14:35,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6840 conditions, 2496 events. 1632/2496 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11830 event pairs, 582 based on Foata normal form. 6/2489 useless extension candidates. Maximal degree in co-relation 6822. Up to 2348 conditions per place. [2024-06-14 12:14:35,888 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-14 12:14:35,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 382 flow [2024-06-14 12:14:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 12:14:35,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-14 12:14:35,890 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 123 transitions. [2024-06-14 12:14:35,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 382 flow [2024-06-14 12:14:35,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:35,892 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-14 12:14:35,893 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-14 12:14:35,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 12:14:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-14 12:14:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-14 12:14:35,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:35,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:14:35,894 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)] === [2024-06-14 12:14:35,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1592947963, now seen corresponding path program 1 times [2024-06-14 12:14:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:35,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000059132] [2024-06-14 12:14:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:36,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:36,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000059132] [2024-06-14 12:14:36,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000059132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:36,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:14:36,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202809156] [2024-06-14 12:14:36,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:14:36,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:14:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:14:36,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:36,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 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) [2024-06-14 12:14:36,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:36,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:36,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:36,845 INFO L124 PetriNetUnfolderBase]: 1375/2213 cut-off events. [2024-06-14 12:14:36,845 INFO L125 PetriNetUnfolderBase]: For 3103/3103 co-relation queries the response was YES. [2024-06-14 12:14:36,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 2213 events. 1375/2213 cut-off events. For 3103/3103 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10971 event pairs, 673 based on Foata normal form. 2/2178 useless extension candidates. Maximal degree in co-relation 6316. Up to 2047 conditions per place. [2024-06-14 12:14:36,854 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-14 12:14:36,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 341 flow [2024-06-14 12:14:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 12:14:36,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:14:36,855 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 91 transitions. [2024-06-14 12:14:36,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 341 flow [2024-06-14 12:14:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:36,858 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-14 12:14:36,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 12:14:36,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 12:14:36,859 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-14 12:14:36,859 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) [2024-06-14 12:14:36,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:36,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:36,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:14:36,860 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)] === [2024-06-14 12:14:36,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2136747659, now seen corresponding path program 1 times [2024-06-14 12:14:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:36,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441201658] [2024-06-14 12:14:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:37,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441201658] [2024-06-14 12:14:37,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441201658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:37,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113875089] [2024-06-14 12:14:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:37,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:37,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:37,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:37,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:37,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:37,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:38,149 INFO L124 PetriNetUnfolderBase]: 1629/2505 cut-off events. [2024-06-14 12:14:38,150 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-06-14 12:14:38,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 2505 events. 1629/2505 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11838 event pairs, 791 based on Foata normal form. 3/2507 useless extension candidates. Maximal degree in co-relation 7735. Up to 2382 conditions per place. [2024-06-14 12:14:38,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-14 12:14:38,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 462 flow [2024-06-14 12:14:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:14:38,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:14:38,168 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:14:38,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 462 flow [2024-06-14 12:14:38,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 440 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:38,174 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 309 flow [2024-06-14 12:14:38,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-14 12:14:38,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 12:14:38,176 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 309 flow [2024-06-14 12:14:38,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:38,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:38,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:38,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:14:38,177 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)] === [2024-06-14 12:14:38,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:38,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1824284786, now seen corresponding path program 1 times [2024-06-14 12:14:38,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:38,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832265579] [2024-06-14 12:14:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:38,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:39,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:39,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832265579] [2024-06-14 12:14:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832265579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:39,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:39,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816346036] [2024-06-14 12:14:39,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:39,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:39,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:39,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 309 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:39,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:39,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:39,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:39,536 INFO L124 PetriNetUnfolderBase]: 1697/2612 cut-off events. [2024-06-14 12:14:39,536 INFO L125 PetriNetUnfolderBase]: For 7867/7877 co-relation queries the response was YES. [2024-06-14 12:14:39,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2612 events. 1697/2612 cut-off events. For 7867/7877 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12379 event pairs, 793 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 9028. Up to 2473 conditions per place. [2024-06-14 12:14:39,555 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-14 12:14:39,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 521 flow [2024-06-14 12:14:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 12:14:39,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:14:39,557 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 309 flow. Second operand 6 states and 105 transitions. [2024-06-14 12:14:39,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 521 flow [2024-06-14 12:14:39,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 505 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:39,563 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 353 flow [2024-06-14 12:14:39,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 12:14:39,564 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-14 12:14:39,564 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 353 flow [2024-06-14 12:14:39,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:39,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:39,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:39,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:14:39,565 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)] === [2024-06-14 12:14:39,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1343665436, now seen corresponding path program 2 times [2024-06-14 12:14:39,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:39,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122674212] [2024-06-14 12:14:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:39,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122674212] [2024-06-14 12:14:40,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122674212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:40,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533319033] [2024-06-14 12:14:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:40,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:40,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:40,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:40,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:40,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:40,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:40,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:40,697 INFO L124 PetriNetUnfolderBase]: 1692/2607 cut-off events. [2024-06-14 12:14:40,697 INFO L125 PetriNetUnfolderBase]: For 10116/10136 co-relation queries the response was YES. [2024-06-14 12:14:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2607 events. 1692/2607 cut-off events. For 10116/10136 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12372 event pairs, 800 based on Foata normal form. 10/2604 useless extension candidates. Maximal degree in co-relation 9587. Up to 2448 conditions per place. [2024-06-14 12:14:40,712 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-14 12:14:40,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 563 flow [2024-06-14 12:14:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 12:14:40,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:14:40,715 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 353 flow. Second operand 6 states and 104 transitions. [2024-06-14 12:14:40,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 563 flow [2024-06-14 12:14:40,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 527 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:40,724 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 393 flow [2024-06-14 12:14:40,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-14 12:14:40,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 12:14:40,728 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 393 flow [2024-06-14 12:14:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:40,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:40,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:14:40,730 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)] === [2024-06-14 12:14:40,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:40,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1343673372, now seen corresponding path program 1 times [2024-06-14 12:14:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:40,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40305528] [2024-06-14 12:14:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:41,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:41,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40305528] [2024-06-14 12:14:41,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40305528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:41,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:41,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:41,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978662856] [2024-06-14 12:14:41,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:41,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:41,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:41,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:41,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:41,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:41,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:42,224 INFO L124 PetriNetUnfolderBase]: 1637/2543 cut-off events. [2024-06-14 12:14:42,224 INFO L125 PetriNetUnfolderBase]: For 12161/12161 co-relation queries the response was YES. [2024-06-14 12:14:42,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9901 conditions, 2543 events. 1637/2543 cut-off events. For 12161/12161 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12146 event pairs, 755 based on Foata normal form. 3/2545 useless extension candidates. Maximal degree in co-relation 9873. Up to 2381 conditions per place. [2024-06-14 12:14:42,235 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-14 12:14:42,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 677 flow [2024-06-14 12:14:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:14:42,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 12:14:42,236 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 393 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:14:42,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 677 flow [2024-06-14 12:14:42,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 625 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:42,244 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 432 flow [2024-06-14 12:14:42,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-14 12:14:42,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-14 12:14:42,245 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 432 flow [2024-06-14 12:14:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:42,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:42,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:42,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:14:42,246 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)] === [2024-06-14 12:14:42,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash 413487814, now seen corresponding path program 1 times [2024-06-14 12:14:42,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:42,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803432924] [2024-06-14 12:14:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:42,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:42,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:42,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803432924] [2024-06-14 12:14:42,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803432924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:42,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:42,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944700697] [2024-06-14 12:14:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:42,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:42,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:43,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:43,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:43,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:43,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:43,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:43,524 INFO L124 PetriNetUnfolderBase]: 1756/2680 cut-off events. [2024-06-14 12:14:43,525 INFO L125 PetriNetUnfolderBase]: For 16886/16905 co-relation queries the response was YES. [2024-06-14 12:14:43,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11335 conditions, 2680 events. 1756/2680 cut-off events. For 16886/16905 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12542 event pairs, 680 based on Foata normal form. 5/2678 useless extension candidates. Maximal degree in co-relation 11306. Up to 2493 conditions per place. [2024-06-14 12:14:43,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 12:14:43,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 724 flow [2024-06-14 12:14:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:14:43,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-14 12:14:43,541 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 432 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:14:43,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 724 flow [2024-06-14 12:14:43,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 663 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:43,548 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 469 flow [2024-06-14 12:14:43,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-14 12:14:43,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-14 12:14:43,551 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 469 flow [2024-06-14 12:14:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:43,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:43,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:14:43,551 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)] === [2024-06-14 12:14:43,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1473174902, now seen corresponding path program 1 times [2024-06-14 12:14:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:43,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101227472] [2024-06-14 12:14:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:43,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:44,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:44,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101227472] [2024-06-14 12:14:44,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101227472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:44,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:44,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:44,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827538974] [2024-06-14 12:14:44,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:44,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:44,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:44,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:44,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 469 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:44,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:44,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:44,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:44,731 INFO L124 PetriNetUnfolderBase]: 1945/2884 cut-off events. [2024-06-14 12:14:44,731 INFO L125 PetriNetUnfolderBase]: For 20742/20742 co-relation queries the response was YES. [2024-06-14 12:14:44,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12970 conditions, 2884 events. 1945/2884 cut-off events. For 20742/20742 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13029 event pairs, 701 based on Foata normal form. 3/2886 useless extension candidates. Maximal degree in co-relation 12939. Up to 2812 conditions per place. [2024-06-14 12:14:44,748 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-14 12:14:44,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 899 flow [2024-06-14 12:14:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:14:44,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 12:14:44,750 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 469 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:14:44,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 899 flow [2024-06-14 12:14:44,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 853 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:44,760 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 601 flow [2024-06-14 12:14:44,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-14 12:14:44,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-14 12:14:44,761 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 601 flow [2024-06-14 12:14:44,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:44,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:44,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:14:44,762 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)] === [2024-06-14 12:14:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1473175088, now seen corresponding path program 2 times [2024-06-14 12:14:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651154299] [2024-06-14 12:14:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651154299] [2024-06-14 12:14:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651154299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:45,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:45,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452712838] [2024-06-14 12:14:45,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:45,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:45,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:45,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 601 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:45,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:45,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:45,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:45,989 INFO L124 PetriNetUnfolderBase]: 1852/2803 cut-off events. [2024-06-14 12:14:45,990 INFO L125 PetriNetUnfolderBase]: For 26796/26827 co-relation queries the response was YES. [2024-06-14 12:14:45,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13682 conditions, 2803 events. 1852/2803 cut-off events. For 26796/26827 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13042 event pairs, 647 based on Foata normal form. 5/2795 useless extension candidates. Maximal degree in co-relation 13648. Up to 2573 conditions per place. [2024-06-14 12:14:46,006 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-14 12:14:46,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 1011 flow [2024-06-14 12:14:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:14:46,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 12:14:46,008 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 601 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:14:46,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 1011 flow [2024-06-14 12:14:46,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 961 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:46,020 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 701 flow [2024-06-14 12:14:46,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=701, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-14 12:14:46,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-14 12:14:46,021 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 701 flow [2024-06-14 12:14:46,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:46,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:46,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:46,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:14:46,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:46,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1064125816, now seen corresponding path program 2 times [2024-06-14 12:14:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:46,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134459356] [2024-06-14 12:14:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:46,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:46,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134459356] [2024-06-14 12:14:46,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134459356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:46,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:46,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:46,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331863094] [2024-06-14 12:14:46,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:46,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:46,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:46,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:46,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 701 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:46,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:46,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:46,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:47,385 INFO L124 PetriNetUnfolderBase]: 2001/2967 cut-off events. [2024-06-14 12:14:47,385 INFO L125 PetriNetUnfolderBase]: For 32002/32014 co-relation queries the response was YES. [2024-06-14 12:14:47,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15123 conditions, 2967 events. 2001/2967 cut-off events. For 32002/32014 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13472 event pairs, 692 based on Foata normal form. 15/2981 useless extension candidates. Maximal degree in co-relation 15087. Up to 2807 conditions per place. [2024-06-14 12:14:47,402 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 34 changer transitions 0/122 dead transitions. [2024-06-14 12:14:47,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1207 flow [2024-06-14 12:14:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:14:47,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 12:14:47,404 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 701 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:14:47,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1207 flow [2024-06-14 12:14:47,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1153 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:47,421 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 835 flow [2024-06-14 12:14:47,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-14 12:14:47,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 12:14:47,422 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 835 flow [2024-06-14 12:14:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:47,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:47,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:47,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:14:47,423 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)] === [2024-06-14 12:14:47,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 419921554, now seen corresponding path program 3 times [2024-06-14 12:14:47,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:47,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600661540] [2024-06-14 12:14:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:47,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600661540] [2024-06-14 12:14:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600661540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493194590] [2024-06-14 12:14:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:48,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:48,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:48,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:48,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:48,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:48,654 INFO L124 PetriNetUnfolderBase]: 1860/2823 cut-off events. [2024-06-14 12:14:48,655 INFO L125 PetriNetUnfolderBase]: For 37063/37096 co-relation queries the response was YES. [2024-06-14 12:14:48,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15253 conditions, 2823 events. 1860/2823 cut-off events. For 37063/37096 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13177 event pairs, 662 based on Foata normal form. 12/2828 useless extension candidates. Maximal degree in co-relation 15214. Up to 2546 conditions per place. [2024-06-14 12:14:48,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 31 changer transitions 0/124 dead transitions. [2024-06-14 12:14:48,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1223 flow [2024-06-14 12:14:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:14:48,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:14:48,706 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 835 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:14:48,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1223 flow [2024-06-14 12:14:48,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1118 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:48,728 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 860 flow [2024-06-14 12:14:48,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-14 12:14:48,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 12:14:48,729 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 860 flow [2024-06-14 12:14:48,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:48,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:48,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:48,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:14:48,730 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)] === [2024-06-14 12:14:48,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 420158890, now seen corresponding path program 3 times [2024-06-14 12:14:48,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:48,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602084260] [2024-06-14 12:14:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:48,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:49,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:49,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602084260] [2024-06-14 12:14:49,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602084260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:49,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:49,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676711907] [2024-06-14 12:14:49,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:49,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:49,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:49,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:49,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:49,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:49,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:49,888 INFO L124 PetriNetUnfolderBase]: 1993/2956 cut-off events. [2024-06-14 12:14:49,889 INFO L125 PetriNetUnfolderBase]: For 40414/40426 co-relation queries the response was YES. [2024-06-14 12:14:49,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16089 conditions, 2956 events. 1993/2956 cut-off events. For 40414/40426 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13399 event pairs, 684 based on Foata normal form. 15/2970 useless extension candidates. Maximal degree in co-relation 16049. Up to 2798 conditions per place. [2024-06-14 12:14:49,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-14 12:14:49,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1267 flow [2024-06-14 12:14:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:14:49,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 12:14:49,908 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 860 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:14:49,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1267 flow [2024-06-14 12:14:49,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1161 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:49,928 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 902 flow [2024-06-14 12:14:49,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-14 12:14:49,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-14 12:14:49,928 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 902 flow [2024-06-14 12:14:49,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:49,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:49,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:49,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:14:49,929 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)] === [2024-06-14 12:14:49,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 420167818, now seen corresponding path program 1 times [2024-06-14 12:14:49,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:49,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744863515] [2024-06-14 12:14:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:49,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:50,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744863515] [2024-06-14 12:14:50,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744863515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:50,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:50,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:50,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773756845] [2024-06-14 12:14:50,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:50,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:50,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:50,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:50,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:50,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 902 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:50,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:50,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:51,460 INFO L124 PetriNetUnfolderBase]: 1744/2704 cut-off events. [2024-06-14 12:14:51,461 INFO L125 PetriNetUnfolderBase]: For 37643/37643 co-relation queries the response was YES. [2024-06-14 12:14:51,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14584 conditions, 2704 events. 1744/2704 cut-off events. For 37643/37643 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12886 event pairs, 560 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 14543. Up to 2510 conditions per place. [2024-06-14 12:14:51,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-14 12:14:51,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1336 flow [2024-06-14 12:14:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:14:51,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:14:51,480 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 902 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:14:51,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1336 flow [2024-06-14 12:14:51,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1245 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:51,504 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 923 flow [2024-06-14 12:14:51,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-06-14 12:14:51,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-14 12:14:51,505 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 923 flow [2024-06-14 12:14:51,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:51,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:51,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:14:51,506 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)] === [2024-06-14 12:14:51,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1852558405, now seen corresponding path program 1 times [2024-06-14 12:14:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:51,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044270942] [2024-06-14 12:14:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:52,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:52,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044270942] [2024-06-14 12:14:52,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044270942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:52,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:52,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:52,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840058225] [2024-06-14 12:14:52,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:52,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:52,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:52,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:52,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 923 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-14 12:14:52,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:52,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:52,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:52,568 INFO L124 PetriNetUnfolderBase]: 1741/2699 cut-off events. [2024-06-14 12:14:52,568 INFO L125 PetriNetUnfolderBase]: For 40529/40529 co-relation queries the response was YES. [2024-06-14 12:14:52,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2699 events. 1741/2699 cut-off events. For 40529/40529 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12868 event pairs, 579 based on Foata normal form. 1/2699 useless extension candidates. Maximal degree in co-relation 14891. Up to 2579 conditions per place. [2024-06-14 12:14:52,583 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 104 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-14 12:14:52,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 1167 flow [2024-06-14 12:14:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-14 12:14:52,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-14 12:14:52,584 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 923 flow. Second operand 5 states and 83 transitions. [2024-06-14 12:14:52,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 1167 flow [2024-06-14 12:14:52,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1069 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:52,608 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 847 flow [2024-06-14 12:14:52,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=847, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-14 12:14:52,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 12:14:52,608 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 847 flow [2024-06-14 12:14:52,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-14 12:14:52,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:52,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:52,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:14:52,609 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)] === [2024-06-14 12:14:52,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1572490645, now seen corresponding path program 1 times [2024-06-14 12:14:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:52,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113217501] [2024-06-14 12:14:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:52,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113217501] [2024-06-14 12:14:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113217501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:53,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947405630] [2024-06-14 12:14:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:53,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:53,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 847 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:53,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:53,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:53,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:54,168 INFO L124 PetriNetUnfolderBase]: 1855/2815 cut-off events. [2024-06-14 12:14:54,168 INFO L125 PetriNetUnfolderBase]: For 49877/49879 co-relation queries the response was YES. [2024-06-14 12:14:54,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15944 conditions, 2815 events. 1855/2815 cut-off events. For 49877/49879 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13129 event pairs, 637 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 15901. Up to 2601 conditions per place. [2024-06-14 12:14:54,184 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2024-06-14 12:14:54,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1153 flow [2024-06-14 12:14:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:14:54,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-14 12:14:54,186 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 847 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:14:54,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1153 flow [2024-06-14 12:14:54,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1107 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:54,214 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 851 flow [2024-06-14 12:14:54,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-14 12:14:54,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 12:14:54,215 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 851 flow [2024-06-14 12:14:54,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:54,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:54,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:54,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:14:54,215 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)] === [2024-06-14 12:14:54,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:54,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1572494520, now seen corresponding path program 1 times [2024-06-14 12:14:54,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:54,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062215246] [2024-06-14 12:14:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:54,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062215246] [2024-06-14 12:14:54,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062215246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:54,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:54,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:54,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446819510] [2024-06-14 12:14:54,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:54,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:54,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:54,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 851 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:54,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:54,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:54,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:55,618 INFO L124 PetriNetUnfolderBase]: 2056/3044 cut-off events. [2024-06-14 12:14:55,619 INFO L125 PetriNetUnfolderBase]: For 56151/56151 co-relation queries the response was YES. [2024-06-14 12:14:55,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17520 conditions, 3044 events. 2056/3044 cut-off events. For 56151/56151 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13812 event pairs, 663 based on Foata normal form. 6/3049 useless extension candidates. Maximal degree in co-relation 17477. Up to 2886 conditions per place. [2024-06-14 12:14:55,638 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-14 12:14:55,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 156 transitions, 1521 flow [2024-06-14 12:14:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:14:55,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:14:55,642 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 851 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:14:55,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 156 transitions, 1521 flow [2024-06-14 12:14:55,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1473 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:55,672 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 1075 flow [2024-06-14 12:14:55,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-14 12:14:55,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 12:14:55,672 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 1075 flow [2024-06-14 12:14:55,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:55,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:55,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:55,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:14:55,673 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)] === [2024-06-14 12:14:55,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -488022284, now seen corresponding path program 2 times [2024-06-14 12:14:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:55,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391921128] [2024-06-14 12:14:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:55,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391921128] [2024-06-14 12:14:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391921128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:56,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:56,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414562886] [2024-06-14 12:14:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:56,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:56,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:56,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 1075 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:56,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:56,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:56,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:57,005 INFO L124 PetriNetUnfolderBase]: 2308/3401 cut-off events. [2024-06-14 12:14:57,006 INFO L125 PetriNetUnfolderBase]: For 72863/72863 co-relation queries the response was YES. [2024-06-14 12:14:57,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21315 conditions, 3401 events. 2308/3401 cut-off events. For 72863/72863 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15660 event pairs, 621 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 21269. Up to 2898 conditions per place. [2024-06-14 12:14:57,028 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 126 selfloop transitions, 44 changer transitions 0/173 dead transitions. [2024-06-14 12:14:57,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 173 transitions, 1961 flow [2024-06-14 12:14:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:14:57,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:14:57,031 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 1075 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:14:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 173 transitions, 1961 flow [2024-06-14 12:14:57,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1857 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:57,084 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1290 flow [2024-06-14 12:14:57,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-14 12:14:57,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-14 12:14:57,084 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1290 flow [2024-06-14 12:14:57,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:57,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:57,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:57,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:14:57,086 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)] === [2024-06-14 12:14:57,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash -488016704, now seen corresponding path program 3 times [2024-06-14 12:14:57,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:57,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078451281] [2024-06-14 12:14:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:57,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:57,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078451281] [2024-06-14 12:14:57,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078451281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:57,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:57,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849455439] [2024-06-14 12:14:57,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:57,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:57,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:57,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1290 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:57,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:57,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:57,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:58,545 INFO L124 PetriNetUnfolderBase]: 2354/3467 cut-off events. [2024-06-14 12:14:58,545 INFO L125 PetriNetUnfolderBase]: For 81748/81748 co-relation queries the response was YES. [2024-06-14 12:14:58,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22920 conditions, 3467 events. 2354/3467 cut-off events. For 81748/81748 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15996 event pairs, 613 based on Foata normal form. 12/3478 useless extension candidates. Maximal degree in co-relation 22871. Up to 2947 conditions per place. [2024-06-14 12:14:58,566 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-14 12:14:58,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 181 transitions, 2114 flow [2024-06-14 12:14:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:14:58,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:14:58,567 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1290 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:14:58,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 181 transitions, 2114 flow [2024-06-14 12:14:58,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 181 transitions, 1997 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:58,628 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1560 flow [2024-06-14 12:14:58,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1560, PETRI_PLACES=115, PETRI_TRANSITIONS=146} [2024-06-14 12:14:58,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-14 12:14:58,629 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1560 flow [2024-06-14 12:14:58,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:58,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:58,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:58,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:14:58,630 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)] === [2024-06-14 12:14:58,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1576219387, now seen corresponding path program 1 times [2024-06-14 12:14:58,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:58,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404606604] [2024-06-14 12:14:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:58,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:59,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:59,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404606604] [2024-06-14 12:14:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404606604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:59,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:59,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242826941] [2024-06-14 12:14:59,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:59,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:59,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:59,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:59,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:59,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 146 transitions, 1560 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:59,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:59,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:00,113 INFO L124 PetriNetUnfolderBase]: 2342/3449 cut-off events. [2024-06-14 12:15:00,113 INFO L125 PetriNetUnfolderBase]: For 87069/87069 co-relation queries the response was YES. [2024-06-14 12:15:00,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23560 conditions, 3449 events. 2342/3449 cut-off events. For 87069/87069 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15869 event pairs, 676 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 23507. Up to 3366 conditions per place. [2024-06-14 12:15:00,138 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 148 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-14 12:15:00,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 2132 flow [2024-06-14 12:15:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:15:00,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:15:00,140 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1560 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:15:00,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 2132 flow [2024-06-14 12:15:00,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 2047 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:00,217 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1612 flow [2024-06-14 12:15:00,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-06-14 12:15:00,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 12:15:00,218 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1612 flow [2024-06-14 12:15:00,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:00,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:00,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:15:00,218 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:00,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 140291705, now seen corresponding path program 2 times [2024-06-14 12:15:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33098721] [2024-06-14 12:15:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:01,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:01,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33098721] [2024-06-14 12:15:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33098721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:01,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:01,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168048409] [2024-06-14 12:15:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:01,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:01,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1612 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:01,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:01,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:01,883 INFO L124 PetriNetUnfolderBase]: 2368/3488 cut-off events. [2024-06-14 12:15:01,883 INFO L125 PetriNetUnfolderBase]: For 89982/89996 co-relation queries the response was YES. [2024-06-14 12:15:01,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23739 conditions, 3488 events. 2368/3488 cut-off events. For 89982/89996 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16097 event pairs, 658 based on Foata normal form. 17/3504 useless extension candidates. Maximal degree in co-relation 23684. Up to 3270 conditions per place. [2024-06-14 12:15:01,908 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 58 changer transitions 0/188 dead transitions. [2024-06-14 12:15:01,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 188 transitions, 2376 flow [2024-06-14 12:15:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:15:01,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:15:01,911 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1612 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:15:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 188 transitions, 2376 flow [2024-06-14 12:15:01,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 188 transitions, 2275 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:01,996 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1789 flow [2024-06-14 12:15:01,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-14 12:15:01,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-14 12:15:01,996 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1789 flow [2024-06-14 12:15:01,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:01,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:01,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:15:01,998 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)] === [2024-06-14 12:15:01,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash 140024578, now seen corresponding path program 4 times [2024-06-14 12:15:01,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:01,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53080375] [2024-06-14 12:15:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:01,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:02,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:02,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53080375] [2024-06-14 12:15:02,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53080375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:02,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:02,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884456525] [2024-06-14 12:15:02,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:02,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:02,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:02,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:02,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1789 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:02,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:02,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:02,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:03,527 INFO L124 PetriNetUnfolderBase]: 2520/3706 cut-off events. [2024-06-14 12:15:03,527 INFO L125 PetriNetUnfolderBase]: For 107372/107386 co-relation queries the response was YES. [2024-06-14 12:15:03,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26147 conditions, 3706 events. 2520/3706 cut-off events. For 107372/107386 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17280 event pairs, 608 based on Foata normal form. 20/3725 useless extension candidates. Maximal degree in co-relation 26091. Up to 2755 conditions per place. [2024-06-14 12:15:03,556 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 99 changer transitions 0/211 dead transitions. [2024-06-14 12:15:03,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 211 transitions, 2925 flow [2024-06-14 12:15:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:15:03,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:15:03,558 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1789 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:15:03,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 211 transitions, 2925 flow [2024-06-14 12:15:03,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2793 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:03,637 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 2245 flow [2024-06-14 12:15:03,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2245, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-06-14 12:15:03,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-14 12:15:03,638 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 2245 flow [2024-06-14 12:15:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:03,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:03,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:03,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:15:03,638 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)] === [2024-06-14 12:15:03,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:03,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1522643882, now seen corresponding path program 5 times [2024-06-14 12:15:03,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:03,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474816130] [2024-06-14 12:15:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:03,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:04,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474816130] [2024-06-14 12:15:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474816130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:04,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:04,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418716437] [2024-06-14 12:15:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:04,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:04,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:04,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 2245 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:04,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:04,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:04,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:05,108 INFO L124 PetriNetUnfolderBase]: 2620/3848 cut-off events. [2024-06-14 12:15:05,108 INFO L125 PetriNetUnfolderBase]: For 122175/122189 co-relation queries the response was YES. [2024-06-14 12:15:05,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29103 conditions, 3848 events. 2620/3848 cut-off events. For 122175/122189 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18060 event pairs, 642 based on Foata normal form. 14/3861 useless extension candidates. Maximal degree in co-relation 29044. Up to 2820 conditions per place. [2024-06-14 12:15:05,138 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 129 selfloop transitions, 93 changer transitions 0/225 dead transitions. [2024-06-14 12:15:05,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 3420 flow [2024-06-14 12:15:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:15:05,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:15:05,140 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 2245 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:15:05,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 3420 flow [2024-06-14 12:15:05,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 3279 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-14 12:15:05,250 INFO L231 Difference]: Finished difference. Result has 136 places, 189 transitions, 2663 flow [2024-06-14 12:15:05,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2663, PETRI_PLACES=136, PETRI_TRANSITIONS=189} [2024-06-14 12:15:05,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 12:15:05,251 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 189 transitions, 2663 flow [2024-06-14 12:15:05,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:05,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:05,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:05,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:15:05,252 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)] === [2024-06-14 12:15:05,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash 132673145, now seen corresponding path program 3 times [2024-06-14 12:15:05,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:05,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30180452] [2024-06-14 12:15:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:05,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:06,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30180452] [2024-06-14 12:15:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30180452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:06,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:06,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543089272] [2024-06-14 12:15:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:06,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:06,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 189 transitions, 2663 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:06,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:06,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:06,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:06,998 INFO L124 PetriNetUnfolderBase]: 2614/3838 cut-off events. [2024-06-14 12:15:06,998 INFO L125 PetriNetUnfolderBase]: For 124632/124646 co-relation queries the response was YES. [2024-06-14 12:15:07,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30037 conditions, 3838 events. 2614/3838 cut-off events. For 124632/124646 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17959 event pairs, 693 based on Foata normal form. 17/3854 useless extension candidates. Maximal degree in co-relation 29973. Up to 3670 conditions per place. [2024-06-14 12:15:07,031 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2024-06-14 12:15:07,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 3301 flow [2024-06-14 12:15:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:15:07,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 12:15:07,033 INFO L175 Difference]: Start difference. First operand has 136 places, 189 transitions, 2663 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:15:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 3301 flow [2024-06-14 12:15:07,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 215 transitions, 2981 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:07,278 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 2434 flow [2024-06-14 12:15:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2434, PETRI_PLACES=139, PETRI_TRANSITIONS=189} [2024-06-14 12:15:07,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 12:15:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 2434 flow [2024-06-14 12:15:07,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:07,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:07,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:07,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:15:07,280 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)] === [2024-06-14 12:15:07,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:07,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1371838948, now seen corresponding path program 6 times [2024-06-14 12:15:07,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:07,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245110487] [2024-06-14 12:15:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245110487] [2024-06-14 12:15:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245110487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893533614] [2024-06-14 12:15:07,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:07,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:08,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:08,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 189 transitions, 2434 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:08,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:08,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:08,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:08,679 INFO L124 PetriNetUnfolderBase]: 2590/3808 cut-off events. [2024-06-14 12:15:08,680 INFO L125 PetriNetUnfolderBase]: For 129091/129105 co-relation queries the response was YES. [2024-06-14 12:15:08,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28515 conditions, 3808 events. 2590/3808 cut-off events. For 129091/129105 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17835 event pairs, 644 based on Foata normal form. 20/3827 useless extension candidates. Maximal degree in co-relation 28452. Up to 2810 conditions per place. [2024-06-14 12:15:08,708 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 131 selfloop transitions, 92 changer transitions 0/226 dead transitions. [2024-06-14 12:15:08,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 226 transitions, 3399 flow [2024-06-14 12:15:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:15:08,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:15:08,709 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 2434 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:15:08,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 226 transitions, 3399 flow [2024-06-14 12:15:08,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 226 transitions, 3299 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:08,795 INFO L231 Difference]: Finished difference. Result has 140 places, 191 transitions, 2586 flow [2024-06-14 12:15:08,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2586, PETRI_PLACES=140, PETRI_TRANSITIONS=191} [2024-06-14 12:15:08,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-14 12:15:08,796 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 191 transitions, 2586 flow [2024-06-14 12:15:08,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:08,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:08,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:15:08,796 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:08,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1594733979, now seen corresponding path program 1 times [2024-06-14 12:15:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:08,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487006275] [2024-06-14 12:15:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:09,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487006275] [2024-06-14 12:15:09,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487006275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:09,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:09,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:09,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196176000] [2024-06-14 12:15:09,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:09,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:09,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:09,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 191 transitions, 2586 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:09,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:09,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:09,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:10,186 INFO L124 PetriNetUnfolderBase]: 2332/3539 cut-off events. [2024-06-14 12:15:10,186 INFO L125 PetriNetUnfolderBase]: For 115767/115767 co-relation queries the response was YES. [2024-06-14 12:15:10,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3539 events. 2332/3539 cut-off events. For 115767/115767 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17137 event pairs, 588 based on Foata normal form. 2/3540 useless extension candidates. Maximal degree in co-relation 26783. Up to 3414 conditions per place. [2024-06-14 12:15:10,213 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 189 selfloop transitions, 11 changer transitions 0/204 dead transitions. [2024-06-14 12:15:10,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 3038 flow [2024-06-14 12:15:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:15:10,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:15:10,214 INFO L175 Difference]: Start difference. First operand has 140 places, 191 transitions, 2586 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:15:10,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 3038 flow [2024-06-14 12:15:10,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 204 transitions, 2759 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:10,321 INFO L231 Difference]: Finished difference. Result has 140 places, 194 transitions, 2369 flow [2024-06-14 12:15:10,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2369, PETRI_PLACES=140, PETRI_TRANSITIONS=194} [2024-06-14 12:15:10,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-14 12:15:10,321 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 194 transitions, 2369 flow [2024-06-14 12:15:10,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:10,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:10,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:10,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:15:10,322 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)] === [2024-06-14 12:15:10,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1933026383, now seen corresponding path program 1 times [2024-06-14 12:15:10,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:10,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255154318] [2024-06-14 12:15:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:11,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:11,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255154318] [2024-06-14 12:15:11,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255154318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:11,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:11,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583212931] [2024-06-14 12:15:11,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:11,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:11,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 194 transitions, 2369 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:11,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:11,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:11,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:12,156 INFO L124 PetriNetUnfolderBase]: 2484/3704 cut-off events. [2024-06-14 12:15:12,156 INFO L125 PetriNetUnfolderBase]: For 137180/137186 co-relation queries the response was YES. [2024-06-14 12:15:12,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28101 conditions, 3704 events. 2484/3704 cut-off events. For 137180/137186 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17779 event pairs, 477 based on Foata normal form. 10/3713 useless extension candidates. Maximal degree in co-relation 28037. Up to 3347 conditions per place. [2024-06-14 12:15:12,188 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-14 12:15:12,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 227 transitions, 2893 flow [2024-06-14 12:15:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:15:12,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:15:12,190 INFO L175 Difference]: Start difference. First operand has 140 places, 194 transitions, 2369 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:15:12,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 227 transitions, 2893 flow [2024-06-14 12:15:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 227 transitions, 2849 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:12,304 INFO L231 Difference]: Finished difference. Result has 144 places, 196 transitions, 2432 flow [2024-06-14 12:15:12,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2432, PETRI_PLACES=144, PETRI_TRANSITIONS=196} [2024-06-14 12:15:12,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 12:15:12,308 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 196 transitions, 2432 flow [2024-06-14 12:15:12,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:12,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:12,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:12,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:15:12,309 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1933086833, now seen corresponding path program 2 times [2024-06-14 12:15:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:12,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83381743] [2024-06-14 12:15:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:13,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:13,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83381743] [2024-06-14 12:15:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83381743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:13,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:13,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:13,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675429879] [2024-06-14 12:15:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:13,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:13,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:13,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 196 transitions, 2432 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:13,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:13,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:13,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:14,131 INFO L124 PetriNetUnfolderBase]: 2501/3731 cut-off events. [2024-06-14 12:15:14,132 INFO L125 PetriNetUnfolderBase]: For 147129/147135 co-relation queries the response was YES. [2024-06-14 12:15:14,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28749 conditions, 3731 events. 2501/3731 cut-off events. For 147129/147135 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17949 event pairs, 586 based on Foata normal form. 10/3740 useless extension candidates. Maximal degree in co-relation 28684. Up to 3377 conditions per place. [2024-06-14 12:15:14,163 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-06-14 12:15:14,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 229 transitions, 2966 flow [2024-06-14 12:15:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:15:14,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:15:14,165 INFO L175 Difference]: Start difference. First operand has 144 places, 196 transitions, 2432 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:15:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 229 transitions, 2966 flow [2024-06-14 12:15:14,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 229 transitions, 2877 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:14,381 INFO L231 Difference]: Finished difference. Result has 146 places, 198 transitions, 2463 flow [2024-06-14 12:15:14,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=146, PETRI_TRANSITIONS=198} [2024-06-14 12:15:14,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-14 12:15:14,381 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 198 transitions, 2463 flow [2024-06-14 12:15:14,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:14,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:14,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:15:14,382 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:14,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1933086957, now seen corresponding path program 1 times [2024-06-14 12:15:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:14,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458627018] [2024-06-14 12:15:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:14,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458627018] [2024-06-14 12:15:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458627018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:15,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538388944] [2024-06-14 12:15:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:15,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:15,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:15,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 198 transitions, 2463 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:15,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:15,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:15,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:16,304 INFO L124 PetriNetUnfolderBase]: 2609/3838 cut-off events. [2024-06-14 12:15:16,305 INFO L125 PetriNetUnfolderBase]: For 155410/155410 co-relation queries the response was YES. [2024-06-14 12:15:16,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29579 conditions, 3838 events. 2609/3838 cut-off events. For 155410/155410 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18010 event pairs, 596 based on Foata normal form. 3/3840 useless extension candidates. Maximal degree in co-relation 29513. Up to 3647 conditions per place. [2024-06-14 12:15:16,339 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-14 12:15:16,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 239 transitions, 3364 flow [2024-06-14 12:15:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:15:16,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:15:16,341 INFO L175 Difference]: Start difference. First operand has 146 places, 198 transitions, 2463 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:15:16,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 239 transitions, 3364 flow [2024-06-14 12:15:16,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 239 transitions, 3264 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:16,558 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 2650 flow [2024-06-14 12:15:16,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2650, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-14 12:15:16,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-14 12:15:16,559 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 2650 flow [2024-06-14 12:15:16,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:16,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:16,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:16,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:15:16,559 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:16,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1502690957, now seen corresponding path program 1 times [2024-06-14 12:15:16,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:16,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519023365] [2024-06-14 12:15:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:16,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:17,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:17,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519023365] [2024-06-14 12:15:17,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519023365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:17,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:17,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027528088] [2024-06-14 12:15:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:17,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:17,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:17,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:17,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 2650 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:15:17,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:17,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:17,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:18,201 INFO L124 PetriNetUnfolderBase]: 2597/3822 cut-off events. [2024-06-14 12:15:18,202 INFO L125 PetriNetUnfolderBase]: For 162413/162413 co-relation queries the response was YES. [2024-06-14 12:15:18,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29757 conditions, 3822 events. 2597/3822 cut-off events. For 162413/162413 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17953 event pairs, 570 based on Foata normal form. 6/3827 useless extension candidates. Maximal degree in co-relation 29689. Up to 3401 conditions per place. [2024-06-14 12:15:18,230 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 171 selfloop transitions, 67 changer transitions 0/241 dead transitions. [2024-06-14 12:15:18,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 241 transitions, 3393 flow [2024-06-14 12:15:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:15:18,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:15:18,231 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 2650 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:15:18,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 241 transitions, 3393 flow [2024-06-14 12:15:18,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 241 transitions, 3238 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:18,405 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2777 flow [2024-06-14 12:15:18,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-14 12:15:18,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 12:15:18,405 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2777 flow [2024-06-14 12:15:18,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:15:18,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:18,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:18,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:15:18,406 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:18,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1618161865, now seen corresponding path program 1 times [2024-06-14 12:15:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432201654] [2024-06-14 12:15:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:19,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432201654] [2024-06-14 12:15:19,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432201654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:19,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:19,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130415054] [2024-06-14 12:15:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:19,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:19,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:19,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:19,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2777 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:20,215 INFO L124 PetriNetUnfolderBase]: 2749/4070 cut-off events. [2024-06-14 12:15:20,215 INFO L125 PetriNetUnfolderBase]: For 194826/194826 co-relation queries the response was YES. [2024-06-14 12:15:20,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32015 conditions, 4070 events. 2749/4070 cut-off events. For 194826/194826 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19579 event pairs, 583 based on Foata normal form. 36/4105 useless extension candidates. Maximal degree in co-relation 31945. Up to 3445 conditions per place. [2024-06-14 12:15:20,246 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 180 selfloop transitions, 70 changer transitions 0/253 dead transitions. [2024-06-14 12:15:20,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 253 transitions, 3605 flow [2024-06-14 12:15:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:15:20,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:15:20,247 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2777 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:15:20,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 253 transitions, 3605 flow [2024-06-14 12:15:20,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 253 transitions, 3485 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:20,430 INFO L231 Difference]: Finished difference. Result has 158 places, 213 transitions, 2895 flow [2024-06-14 12:15:20,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2895, PETRI_PLACES=158, PETRI_TRANSITIONS=213} [2024-06-14 12:15:20,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 12:15:20,430 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 213 transitions, 2895 flow [2024-06-14 12:15:20,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:20,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:20,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:15:20,431 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)] === [2024-06-14 12:15:20,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1617977167, now seen corresponding path program 3 times [2024-06-14 12:15:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:20,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154764135] [2024-06-14 12:15:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154764135] [2024-06-14 12:15:21,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154764135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:21,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:21,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35723216] [2024-06-14 12:15:21,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:21,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:21,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 213 transitions, 2895 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:21,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:21,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:21,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:22,316 INFO L124 PetriNetUnfolderBase]: 2634/3964 cut-off events. [2024-06-14 12:15:22,316 INFO L125 PetriNetUnfolderBase]: For 181519/181525 co-relation queries the response was YES. [2024-06-14 12:15:22,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31758 conditions, 3964 events. 2634/3964 cut-off events. For 181519/181525 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19675 event pairs, 569 based on Foata normal form. 10/3973 useless extension candidates. Maximal degree in co-relation 31687. Up to 3570 conditions per place. [2024-06-14 12:15:22,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-14 12:15:22,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 244 transitions, 3451 flow [2024-06-14 12:15:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:15:22,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:15:22,348 INFO L175 Difference]: Start difference. First operand has 158 places, 213 transitions, 2895 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:15:22,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 244 transitions, 3451 flow [2024-06-14 12:15:22,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 244 transitions, 3269 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:22,547 INFO L231 Difference]: Finished difference. Result has 159 places, 215 transitions, 2848 flow [2024-06-14 12:15:22,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2848, PETRI_PLACES=159, PETRI_TRANSITIONS=215} [2024-06-14 12:15:22,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-14 12:15:22,548 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 215 transitions, 2848 flow [2024-06-14 12:15:22,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:22,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:22,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:22,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:15:22,549 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:22,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1175340984, now seen corresponding path program 1 times [2024-06-14 12:15:22,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:22,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898710321] [2024-06-14 12:15:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:22,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898710321] [2024-06-14 12:15:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898710321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:23,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172635417] [2024-06-14 12:15:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:23,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:23,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 215 transitions, 2848 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:23,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:23,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:23,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:23,975 INFO L124 PetriNetUnfolderBase]: 2771/4104 cut-off events. [2024-06-14 12:15:23,976 INFO L125 PetriNetUnfolderBase]: For 186998/186998 co-relation queries the response was YES. [2024-06-14 12:15:23,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32308 conditions, 4104 events. 2771/4104 cut-off events. For 186998/186998 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19806 event pairs, 632 based on Foata normal form. 1/4104 useless extension candidates. Maximal degree in co-relation 32236. Up to 4066 conditions per place. [2024-06-14 12:15:24,010 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 215 selfloop transitions, 16 changer transitions 0/234 dead transitions. [2024-06-14 12:15:24,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 234 transitions, 3468 flow [2024-06-14 12:15:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 12:15:24,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:15:24,013 INFO L175 Difference]: Start difference. First operand has 159 places, 215 transitions, 2848 flow. Second operand 6 states and 99 transitions. [2024-06-14 12:15:24,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 234 transitions, 3468 flow [2024-06-14 12:15:24,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 234 transitions, 3351 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:24,208 INFO L231 Difference]: Finished difference. Result has 159 places, 218 transitions, 2821 flow [2024-06-14 12:15:24,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2821, PETRI_PLACES=159, PETRI_TRANSITIONS=218} [2024-06-14 12:15:24,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-14 12:15:24,209 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 218 transitions, 2821 flow [2024-06-14 12:15:24,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:24,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:24,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:24,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:15:24,210 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)] === [2024-06-14 12:15:24,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash 42853987, now seen corresponding path program 2 times [2024-06-14 12:15:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:24,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382780217] [2024-06-14 12:15:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:25,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:25,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382780217] [2024-06-14 12:15:25,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382780217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:25,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:25,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860945063] [2024-06-14 12:15:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:25,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:25,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:25,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 218 transitions, 2821 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:15:25,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:25,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:25,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:25,795 INFO L124 PetriNetUnfolderBase]: 2759/4092 cut-off events. [2024-06-14 12:15:25,796 INFO L125 PetriNetUnfolderBase]: For 193820/193834 co-relation queries the response was YES. [2024-06-14 12:15:25,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32006 conditions, 4092 events. 2759/4092 cut-off events. For 193820/193834 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19831 event pairs, 568 based on Foata normal form. 14/4105 useless extension candidates. Maximal degree in co-relation 31933. Up to 3463 conditions per place. [2024-06-14 12:15:25,832 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 87 changer transitions 0/256 dead transitions. [2024-06-14 12:15:25,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 256 transitions, 3680 flow [2024-06-14 12:15:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:15:25,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:15:25,833 INFO L175 Difference]: Start difference. First operand has 159 places, 218 transitions, 2821 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:15:25,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 256 transitions, 3680 flow [2024-06-14 12:15:26,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 256 transitions, 3590 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:26,077 INFO L231 Difference]: Finished difference. Result has 165 places, 225 transitions, 3033 flow [2024-06-14 12:15:26,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3033, PETRI_PLACES=165, PETRI_TRANSITIONS=225} [2024-06-14 12:15:26,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 12:15:26,078 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 225 transitions, 3033 flow [2024-06-14 12:15:26,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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) [2024-06-14 12:15:26,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:26,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:15:26,079 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)] === [2024-06-14 12:15:26,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash 42860745, now seen corresponding path program 2 times [2024-06-14 12:15:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966603359] [2024-06-14 12:15:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:27,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:27,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966603359] [2024-06-14 12:15:27,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966603359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:27,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:27,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:27,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165074517] [2024-06-14 12:15:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:27,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:27,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:27,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 225 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:27,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:27,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:27,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:27,972 INFO L124 PetriNetUnfolderBase]: 2911/4340 cut-off events. [2024-06-14 12:15:27,973 INFO L125 PetriNetUnfolderBase]: For 229709/229723 co-relation queries the response was YES. [2024-06-14 12:15:27,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34593 conditions, 4340 events. 2911/4340 cut-off events. For 229709/229723 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21494 event pairs, 584 based on Foata normal form. 44/4383 useless extension candidates. Maximal degree in co-relation 34517. Up to 3507 conditions per place. [2024-06-14 12:15:28,013 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 175 selfloop transitions, 90 changer transitions 0/268 dead transitions. [2024-06-14 12:15:28,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3985 flow [2024-06-14 12:15:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:15:28,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:15:28,016 INFO L175 Difference]: Start difference. First operand has 165 places, 225 transitions, 3033 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:15:28,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3985 flow [2024-06-14 12:15:28,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 268 transitions, 3818 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:28,231 INFO L231 Difference]: Finished difference. Result has 168 places, 228 transitions, 3154 flow [2024-06-14 12:15:28,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3154, PETRI_PLACES=168, PETRI_TRANSITIONS=228} [2024-06-14 12:15:28,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-14 12:15:28,232 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 228 transitions, 3154 flow [2024-06-14 12:15:28,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:28,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:28,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:28,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:15:28,232 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:28,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash 42676047, now seen corresponding path program 4 times [2024-06-14 12:15:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600388953] [2024-06-14 12:15:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:29,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:29,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600388953] [2024-06-14 12:15:29,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600388953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:29,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:29,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:29,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179373022] [2024-06-14 12:15:29,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:29,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:29,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:29,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:29,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 228 transitions, 3154 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:29,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:29,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:30,062 INFO L124 PetriNetUnfolderBase]: 2753/4177 cut-off events. [2024-06-14 12:15:30,062 INFO L125 PetriNetUnfolderBase]: For 210740/210760 co-relation queries the response was YES. [2024-06-14 12:15:30,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33618 conditions, 4177 events. 2753/4177 cut-off events. For 210740/210760 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21281 event pairs, 572 based on Foata normal form. 18/4194 useless extension candidates. Maximal degree in co-relation 33542. Up to 3723 conditions per place. [2024-06-14 12:15:30,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 33 changer transitions 0/256 dead transitions. [2024-06-14 12:15:30,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 3722 flow [2024-06-14 12:15:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:15:30,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:15:30,105 INFO L175 Difference]: Start difference. First operand has 168 places, 228 transitions, 3154 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:15:30,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 3722 flow [2024-06-14 12:15:30,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 256 transitions, 3513 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:30,347 INFO L231 Difference]: Finished difference. Result has 170 places, 230 transitions, 3100 flow [2024-06-14 12:15:30,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3100, PETRI_PLACES=170, PETRI_TRANSITIONS=230} [2024-06-14 12:15:30,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 12:15:30,348 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 230 transitions, 3100 flow [2024-06-14 12:15:30,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:30,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:30,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:30,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:15:30,348 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:30,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 270761895, now seen corresponding path program 3 times [2024-06-14 12:15:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:30,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655214772] [2024-06-14 12:15:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655214772] [2024-06-14 12:15:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655214772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:31,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:31,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117021953] [2024-06-14 12:15:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:31,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:31,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 230 transitions, 3100 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:31,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:31,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:31,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:32,115 INFO L124 PetriNetUnfolderBase]: 3061/4586 cut-off events. [2024-06-14 12:15:32,115 INFO L125 PetriNetUnfolderBase]: For 242969/242983 co-relation queries the response was YES. [2024-06-14 12:15:32,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35680 conditions, 4586 events. 3061/4586 cut-off events. For 242969/242983 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23120 event pairs, 585 based on Foata normal form. 50/4635 useless extension candidates. Maximal degree in co-relation 35603. Up to 3769 conditions per place. [2024-06-14 12:15:32,157 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 106 changer transitions 0/276 dead transitions. [2024-06-14 12:15:32,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 276 transitions, 4048 flow [2024-06-14 12:15:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:15:32,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 12:15:32,158 INFO L175 Difference]: Start difference. First operand has 170 places, 230 transitions, 3100 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:15:32,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 276 transitions, 4048 flow [2024-06-14 12:15:32,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3867 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:32,410 INFO L231 Difference]: Finished difference. Result has 175 places, 238 transitions, 3319 flow [2024-06-14 12:15:32,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3319, PETRI_PLACES=175, PETRI_TRANSITIONS=238} [2024-06-14 12:15:32,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-14 12:15:32,412 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 238 transitions, 3319 flow [2024-06-14 12:15:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:32,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:15:32,412 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:32,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 279332775, now seen corresponding path program 4 times [2024-06-14 12:15:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247307343] [2024-06-14 12:15:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247307343] [2024-06-14 12:15:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247307343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:33,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:33,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969783608] [2024-06-14 12:15:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:33,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:33,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:33,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 238 transitions, 3319 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:33,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:33,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:33,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:34,338 INFO L124 PetriNetUnfolderBase]: 3102/4647 cut-off events. [2024-06-14 12:15:34,339 INFO L125 PetriNetUnfolderBase]: For 244373/244387 co-relation queries the response was YES. [2024-06-14 12:15:34,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37474 conditions, 4647 events. 3102/4647 cut-off events. For 244373/244387 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23558 event pairs, 628 based on Foata normal form. 20/4666 useless extension candidates. Maximal degree in co-relation 37394. Up to 4252 conditions per place. [2024-06-14 12:15:34,386 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-14 12:15:34,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 283 transitions, 4597 flow [2024-06-14 12:15:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:15:34,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 12:15:34,388 INFO L175 Difference]: Start difference. First operand has 175 places, 238 transitions, 3319 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:15:34,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 283 transitions, 4597 flow [2024-06-14 12:15:34,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 4329 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:34,749 INFO L231 Difference]: Finished difference. Result has 180 places, 250 transitions, 3599 flow [2024-06-14 12:15:34,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3599, PETRI_PLACES=180, PETRI_TRANSITIONS=250} [2024-06-14 12:15:34,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-14 12:15:34,750 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 250 transitions, 3599 flow [2024-06-14 12:15:34,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:34,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:34,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:34,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:15:34,751 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:34,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 54076683, now seen corresponding path program 5 times [2024-06-14 12:15:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:34,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946447139] [2024-06-14 12:15:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946447139] [2024-06-14 12:15:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946447139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:35,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151224261] [2024-06-14 12:15:35,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:35,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:35,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:35,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:35,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 250 transitions, 3599 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:35,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:35,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:35,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:36,601 INFO L124 PetriNetUnfolderBase]: 3092/4635 cut-off events. [2024-06-14 12:15:36,602 INFO L125 PetriNetUnfolderBase]: For 245279/245293 co-relation queries the response was YES. [2024-06-14 12:15:36,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36964 conditions, 4635 events. 3092/4635 cut-off events. For 245279/245293 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23502 event pairs, 586 based on Foata normal form. 14/4648 useless extension candidates. Maximal degree in co-relation 36882. Up to 3820 conditions per place. [2024-06-14 12:15:36,648 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 151 selfloop transitions, 129 changer transitions 0/283 dead transitions. [2024-06-14 12:15:36,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 283 transitions, 4401 flow [2024-06-14 12:15:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:15:36,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:15:36,649 INFO L175 Difference]: Start difference. First operand has 180 places, 250 transitions, 3599 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:15:36,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 283 transitions, 4401 flow [2024-06-14 12:15:37,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 283 transitions, 4080 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:37,007 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3544 flow [2024-06-14 12:15:37,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3544, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-14 12:15:37,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 12:15:37,008 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3544 flow [2024-06-14 12:15:37,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-14 12:15:37,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:37,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:37,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:15:37,008 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)] === [2024-06-14 12:15:37,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:37,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2102842074, now seen corresponding path program 2 times [2024-06-14 12:15:37,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:37,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407612997] [2024-06-14 12:15:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:37,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407612997] [2024-06-14 12:15:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407612997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:37,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27500067] [2024-06-14 12:15:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:37,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:37,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3544 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:37,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:37,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:37,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:38,573 INFO L124 PetriNetUnfolderBase]: 3089/4629 cut-off events. [2024-06-14 12:15:38,574 INFO L125 PetriNetUnfolderBase]: For 246857/246871 co-relation queries the response was YES. [2024-06-14 12:15:38,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37093 conditions, 4629 events. 3089/4629 cut-off events. For 246857/246871 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23450 event pairs, 696 based on Foata normal form. 15/4643 useless extension candidates. Maximal degree in co-relation 37009. Up to 4590 conditions per place. [2024-06-14 12:15:38,618 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 240 selfloop transitions, 16 changer transitions 0/259 dead transitions. [2024-06-14 12:15:38,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 259 transitions, 4078 flow [2024-06-14 12:15:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-14 12:15:38,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 12:15:38,620 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3544 flow. Second operand 6 states and 92 transitions. [2024-06-14 12:15:38,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 259 transitions, 4078 flow [2024-06-14 12:15:38,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 259 transitions, 3787 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:38,863 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3291 flow [2024-06-14 12:15:38,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3291, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-14 12:15:38,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 12:15:38,866 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3291 flow [2024-06-14 12:15:38,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:38,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:38,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:38,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:15:38,868 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)] === [2024-06-14 12:15:38,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1181060856, now seen corresponding path program 1 times [2024-06-14 12:15:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831123845] [2024-06-14 12:15:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:39,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:39,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831123845] [2024-06-14 12:15:39,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831123845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:39,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:39,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:39,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937770524] [2024-06-14 12:15:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:39,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:39,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:39,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3291 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:39,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:39,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:39,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:40,410 INFO L124 PetriNetUnfolderBase]: 2842/4376 cut-off events. [2024-06-14 12:15:40,410 INFO L125 PetriNetUnfolderBase]: For 217618/217618 co-relation queries the response was YES. [2024-06-14 12:15:40,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 4376 events. 2842/4376 cut-off events. For 217618/217618 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22830 event pairs, 605 based on Foata normal form. 2/4377 useless extension candidates. Maximal degree in co-relation 33376. Up to 4224 conditions per place. [2024-06-14 12:15:40,450 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 19 changer transitions 0/266 dead transitions. [2024-06-14 12:15:40,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 266 transitions, 3972 flow [2024-06-14 12:15:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:15:40,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 12:15:40,451 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3291 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:15:40,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 266 transitions, 3972 flow [2024-06-14 12:15:40,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 266 transitions, 3932 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:40,690 INFO L231 Difference]: Finished difference. Result has 185 places, 253 transitions, 3342 flow [2024-06-14 12:15:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3342, PETRI_PLACES=185, PETRI_TRANSITIONS=253} [2024-06-14 12:15:40,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 12:15:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 253 transitions, 3342 flow [2024-06-14 12:15:40,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:40,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:40,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:15:40,692 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)] === [2024-06-14 12:15:40,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2103597606, now seen corresponding path program 2 times [2024-06-14 12:15:40,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:40,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853413113] [2024-06-14 12:15:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:41,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:41,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853413113] [2024-06-14 12:15:41,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853413113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:41,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:41,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764510205] [2024-06-14 12:15:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:41,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:41,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:41,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:41,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 253 transitions, 3342 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:41,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:41,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:41,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:42,196 INFO L124 PetriNetUnfolderBase]: 2792/4296 cut-off events. [2024-06-14 12:15:42,196 INFO L125 PetriNetUnfolderBase]: For 223631/223631 co-relation queries the response was YES. [2024-06-14 12:15:42,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33176 conditions, 4296 events. 2792/4296 cut-off events. For 223631/223631 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22333 event pairs, 598 based on Foata normal form. 1/4296 useless extension candidates. Maximal degree in co-relation 33090. Up to 4175 conditions per place. [2024-06-14 12:15:42,235 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 247 selfloop transitions, 11 changer transitions 0/262 dead transitions. [2024-06-14 12:15:42,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 262 transitions, 3880 flow [2024-06-14 12:15:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-14 12:15:42,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-14 12:15:42,236 INFO L175 Difference]: Start difference. First operand has 185 places, 253 transitions, 3342 flow. Second operand 6 states and 95 transitions. [2024-06-14 12:15:42,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 262 transitions, 3880 flow [2024-06-14 12:15:42,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 262 transitions, 3851 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:42,504 INFO L231 Difference]: Finished difference. Result has 188 places, 253 transitions, 3341 flow [2024-06-14 12:15:42,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3341, PETRI_PLACES=188, PETRI_TRANSITIONS=253} [2024-06-14 12:15:42,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 12:15:42,506 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 253 transitions, 3341 flow [2024-06-14 12:15:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:42,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:42,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:42,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:15:42,507 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)] === [2024-06-14 12:15:42,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash -749939047, now seen corresponding path program 1 times [2024-06-14 12:15:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:42,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024712966] [2024-06-14 12:15:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:42,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:43,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:43,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024712966] [2024-06-14 12:15:43,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024712966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:43,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:43,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:43,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951483752] [2024-06-14 12:15:43,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:43,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:43,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:43,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:43,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 253 transitions, 3341 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:43,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:43,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:43,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:44,815 INFO L124 PetriNetUnfolderBase]: 3200/4797 cut-off events. [2024-06-14 12:15:44,816 INFO L125 PetriNetUnfolderBase]: For 284033/284037 co-relation queries the response was YES. [2024-06-14 12:15:44,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38532 conditions, 4797 events. 3200/4797 cut-off events. For 284033/284037 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24366 event pairs, 681 based on Foata normal form. 10/4806 useless extension candidates. Maximal degree in co-relation 38445. Up to 4545 conditions per place. [2024-06-14 12:15:44,865 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 275 selfloop transitions, 46 changer transitions 0/324 dead transitions. [2024-06-14 12:15:44,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 324 transitions, 4972 flow [2024-06-14 12:15:44,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:15:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:15:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:15:44,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:15:44,871 INFO L175 Difference]: Start difference. First operand has 188 places, 253 transitions, 3341 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:15:44,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 324 transitions, 4972 flow [2024-06-14 12:15:45,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 324 transitions, 4923 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:45,295 INFO L231 Difference]: Finished difference. Result has 197 places, 279 transitions, 3942 flow [2024-06-14 12:15:45,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3942, PETRI_PLACES=197, PETRI_TRANSITIONS=279} [2024-06-14 12:15:45,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 12:15:45,297 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 279 transitions, 3942 flow [2024-06-14 12:15:45,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:45,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:45,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:15:45,298 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)] === [2024-06-14 12:15:45,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1491980091, now seen corresponding path program 2 times [2024-06-14 12:15:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:45,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542327081] [2024-06-14 12:15:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:46,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:46,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542327081] [2024-06-14 12:15:46,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542327081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:46,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:46,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158244209] [2024-06-14 12:15:46,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:46,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:46,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:46,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:46,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:46,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 279 transitions, 3942 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:46,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:46,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:46,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:47,405 INFO L124 PetriNetUnfolderBase]: 3455/5182 cut-off events. [2024-06-14 12:15:47,406 INFO L125 PetriNetUnfolderBase]: For 321773/321789 co-relation queries the response was YES. [2024-06-14 12:15:47,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43360 conditions, 5182 events. 3455/5182 cut-off events. For 321773/321789 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26783 event pairs, 665 based on Foata normal form. 22/5203 useless extension candidates. Maximal degree in co-relation 43267. Up to 4794 conditions per place. [2024-06-14 12:15:47,458 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 287 selfloop transitions, 76 changer transitions 0/366 dead transitions. [2024-06-14 12:15:47,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 366 transitions, 6031 flow [2024-06-14 12:15:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:15:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:15:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:15:47,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:15:47,459 INFO L175 Difference]: Start difference. First operand has 197 places, 279 transitions, 3942 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:15:47,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 366 transitions, 6031 flow [2024-06-14 12:15:47,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 366 transitions, 5745 flow, removed 142 selfloop flow, removed 1 redundant places. [2024-06-14 12:15:47,851 INFO L231 Difference]: Finished difference. Result has 209 places, 317 transitions, 4769 flow [2024-06-14 12:15:47,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4769, PETRI_PLACES=209, PETRI_TRANSITIONS=317} [2024-06-14 12:15:47,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 12:15:47,851 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 317 transitions, 4769 flow [2024-06-14 12:15:47,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:47,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:47,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:47,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:15:47,852 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)] === [2024-06-14 12:15:47,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 246588793, now seen corresponding path program 3 times [2024-06-14 12:15:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:47,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230237] [2024-06-14 12:15:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:47,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230237] [2024-06-14 12:15:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:48,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:48,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953738317] [2024-06-14 12:15:48,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:49,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:49,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 317 transitions, 4769 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:49,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:49,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:49,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:50,230 INFO L124 PetriNetUnfolderBase]: 3534/5307 cut-off events. [2024-06-14 12:15:50,231 INFO L125 PetriNetUnfolderBase]: For 348958/348970 co-relation queries the response was YES. [2024-06-14 12:15:50,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 5307 events. 3534/5307 cut-off events. For 348958/348970 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27647 event pairs, 748 based on Foata normal form. 18/5324 useless extension candidates. Maximal degree in co-relation 45391. Up to 4839 conditions per place. [2024-06-14 12:15:50,288 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 75 changer transitions 0/362 dead transitions. [2024-06-14 12:15:50,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 362 transitions, 6209 flow [2024-06-14 12:15:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:15:50,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:15:50,290 INFO L175 Difference]: Start difference. First operand has 209 places, 317 transitions, 4769 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:15:50,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 362 transitions, 6209 flow [2024-06-14 12:15:50,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 362 transitions, 6004 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:50,746 INFO L231 Difference]: Finished difference. Result has 215 places, 323 transitions, 4940 flow [2024-06-14 12:15:50,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4940, PETRI_PLACES=215, PETRI_TRANSITIONS=323} [2024-06-14 12:15:50,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 12:15:50,747 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 323 transitions, 4940 flow [2024-06-14 12:15:50,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:50,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:50,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:15:50,747 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)] === [2024-06-14 12:15:50,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash -120728649, now seen corresponding path program 4 times [2024-06-14 12:15:50,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:50,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935092230] [2024-06-14 12:15:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:50,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:51,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:51,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935092230] [2024-06-14 12:15:51,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935092230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:51,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:51,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979167914] [2024-06-14 12:15:51,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:51,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:51,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:51,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:51,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 323 transitions, 4940 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:51,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:51,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:51,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:52,922 INFO L124 PetriNetUnfolderBase]: 3537/5312 cut-off events. [2024-06-14 12:15:52,923 INFO L125 PetriNetUnfolderBase]: For 363010/363022 co-relation queries the response was YES. [2024-06-14 12:15:52,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45877 conditions, 5312 events. 3537/5312 cut-off events. For 363010/363022 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27677 event pairs, 744 based on Foata normal form. 18/5329 useless extension candidates. Maximal degree in co-relation 45775. Up to 4942 conditions per place. [2024-06-14 12:15:52,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 77 changer transitions 0/362 dead transitions. [2024-06-14 12:15:52,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 362 transitions, 6076 flow [2024-06-14 12:15:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:15:52,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:15:52,984 INFO L175 Difference]: Start difference. First operand has 215 places, 323 transitions, 4940 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:15:52,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 362 transitions, 6076 flow [2024-06-14 12:15:53,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 362 transitions, 5768 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:53,610 INFO L231 Difference]: Finished difference. Result has 218 places, 326 transitions, 4923 flow [2024-06-14 12:15:53,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4923, PETRI_PLACES=218, PETRI_TRANSITIONS=326} [2024-06-14 12:15:53,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 12:15:53,611 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 326 transitions, 4923 flow [2024-06-14 12:15:53,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:53,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:53,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:53,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:15:53,611 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)] === [2024-06-14 12:15:53,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -832588225, now seen corresponding path program 5 times [2024-06-14 12:15:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:53,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990405968] [2024-06-14 12:15:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:54,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:54,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990405968] [2024-06-14 12:15:54,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990405968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:54,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:54,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:54,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052905979] [2024-06-14 12:15:54,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:54,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:54,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:54,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:54,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 326 transitions, 4923 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:54,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:54,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:54,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:55,993 INFO L124 PetriNetUnfolderBase]: 3689/5560 cut-off events. [2024-06-14 12:15:55,994 INFO L125 PetriNetUnfolderBase]: For 418336/418344 co-relation queries the response was YES. [2024-06-14 12:15:56,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47654 conditions, 5560 events. 3689/5560 cut-off events. For 418336/418344 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29386 event pairs, 710 based on Foata normal form. 44/5603 useless extension candidates. Maximal degree in co-relation 47551. Up to 4709 conditions per place. [2024-06-14 12:15:56,185 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/368 dead transitions. [2024-06-14 12:15:56,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 368 transitions, 6099 flow [2024-06-14 12:15:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:15:56,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:15:56,186 INFO L175 Difference]: Start difference. First operand has 218 places, 326 transitions, 4923 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:15:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 368 transitions, 6099 flow [2024-06-14 12:15:57,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 368 transitions, 5866 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:57,009 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 5034 flow [2024-06-14 12:15:57,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5034, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2024-06-14 12:15:57,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 12:15:57,009 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 5034 flow [2024-06-14 12:15:57,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:57,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:57,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:57,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:15:57,010 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)] === [2024-06-14 12:15:57,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:57,011 INFO L85 PathProgramCache]: Analyzing trace with hash 394417315, now seen corresponding path program 1 times [2024-06-14 12:15:57,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:57,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398135467] [2024-06-14 12:15:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:57,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398135467] [2024-06-14 12:15:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398135467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:57,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:57,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034323927] [2024-06-14 12:15:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:57,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:15:57,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:57,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:57,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:15:57,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:59,417 INFO L124 PetriNetUnfolderBase]: 3917/5932 cut-off events. [2024-06-14 12:15:59,418 INFO L125 PetriNetUnfolderBase]: For 472720/472728 co-relation queries the response was YES. [2024-06-14 12:15:59,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52601 conditions, 5932 events. 3917/5932 cut-off events. For 472720/472728 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31933 event pairs, 747 based on Foata normal form. 32/5963 useless extension candidates. Maximal degree in co-relation 52497. Up to 4503 conditions per place. [2024-06-14 12:15:59,483 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 264 selfloop transitions, 111 changer transitions 0/378 dead transitions. [2024-06-14 12:15:59,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 378 transitions, 6542 flow [2024-06-14 12:15:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:15:59,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:15:59,485 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 5034 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:15:59,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 378 transitions, 6542 flow [2024-06-14 12:16:00,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 378 transitions, 6242 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:00,268 INFO L231 Difference]: Finished difference. Result has 222 places, 333 transitions, 5167 flow [2024-06-14 12:16:00,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5167, PETRI_PLACES=222, PETRI_TRANSITIONS=333} [2024-06-14 12:16:00,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-14 12:16:00,269 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 333 transitions, 5167 flow [2024-06-14 12:16:00,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:00,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:00,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:00,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:16:00,270 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)] === [2024-06-14 12:16:00,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:00,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1382310593, now seen corresponding path program 6 times [2024-06-14 12:16:00,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:00,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038929919] [2024-06-14 12:16:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:00,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:01,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:01,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038929919] [2024-06-14 12:16:01,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038929919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:01,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:01,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:16:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748697443] [2024-06-14 12:16:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:01,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:16:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:16:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:16:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 333 transitions, 5167 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:01,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:01,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:01,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:02,918 INFO L124 PetriNetUnfolderBase]: 3907/5918 cut-off events. [2024-06-14 12:16:02,919 INFO L125 PetriNetUnfolderBase]: For 446371/446379 co-relation queries the response was YES. [2024-06-14 12:16:02,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51612 conditions, 5918 events. 3907/5918 cut-off events. For 446371/446379 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31916 event pairs, 803 based on Foata normal form. 14/5931 useless extension candidates. Maximal degree in co-relation 51507. Up to 5245 conditions per place. [2024-06-14 12:16:02,986 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 273 selfloop transitions, 96 changer transitions 0/372 dead transitions. [2024-06-14 12:16:02,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 372 transitions, 6441 flow [2024-06-14 12:16:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:16:02,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:16:02,987 INFO L175 Difference]: Start difference. First operand has 222 places, 333 transitions, 5167 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:16:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 372 transitions, 6441 flow [2024-06-14 12:16:03,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 372 transitions, 6220 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:03,810 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 5282 flow [2024-06-14 12:16:03,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4946, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5282, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2024-06-14 12:16:03,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 12:16:03,811 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 5282 flow [2024-06-14 12:16:03,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:03,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:03,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:03,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:16:03,812 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:03,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash 388691863, now seen corresponding path program 7 times [2024-06-14 12:16:03,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:03,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012282420] [2024-06-14 12:16:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:03,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:04,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012282420] [2024-06-14 12:16:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012282420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:04,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:16:04,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291271360] [2024-06-14 12:16:04,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:04,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:16:04,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:16:04,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:16:04,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:04,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 5282 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:04,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:04,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:04,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:06,250 INFO L124 PetriNetUnfolderBase]: 4020/6089 cut-off events. [2024-06-14 12:16:06,251 INFO L125 PetriNetUnfolderBase]: For 472282/472290 co-relation queries the response was YES. [2024-06-14 12:16:06,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54064 conditions, 6089 events. 4020/6089 cut-off events. For 472282/472290 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 32993 event pairs, 841 based on Foata normal form. 14/6102 useless extension candidates. Maximal degree in co-relation 53957. Up to 5036 conditions per place. [2024-06-14 12:16:06,330 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 279 selfloop transitions, 101 changer transitions 0/383 dead transitions. [2024-06-14 12:16:06,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 383 transitions, 6810 flow [2024-06-14 12:16:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:16:06,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:16:06,333 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 5282 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:16:06,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 383 transitions, 6810 flow [2024-06-14 12:16:07,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 383 transitions, 6502 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:07,194 INFO L231 Difference]: Finished difference. Result has 229 places, 342 transitions, 5438 flow [2024-06-14 12:16:07,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5438, PETRI_PLACES=229, PETRI_TRANSITIONS=342} [2024-06-14 12:16:07,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 12:16:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 342 transitions, 5438 flow [2024-06-14 12:16:07,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:07,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:07,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:07,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:16:07,196 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)] === [2024-06-14 12:16:07,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:07,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2075534962, now seen corresponding path program 1 times [2024-06-14 12:16:07,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:07,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762918640] [2024-06-14 12:16:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:07,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:08,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:08,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762918640] [2024-06-14 12:16:08,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762918640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:08,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:08,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:08,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648910915] [2024-06-14 12:16:08,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:08,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:08,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:08,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:08,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:08,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:08,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 342 transitions, 5438 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:08,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:08,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:08,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:09,407 INFO L124 PetriNetUnfolderBase]: 4028/6101 cut-off events. [2024-06-14 12:16:09,407 INFO L125 PetriNetUnfolderBase]: For 488640/488652 co-relation queries the response was YES. [2024-06-14 12:16:09,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 6101 events. 4028/6101 cut-off events. For 488640/488652 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33188 event pairs, 919 based on Foata normal form. 20/6120 useless extension candidates. Maximal degree in co-relation 54426. Up to 5917 conditions per place. [2024-06-14 12:16:09,491 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 66 changer transitions 0/374 dead transitions. [2024-06-14 12:16:09,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 374 transitions, 6613 flow [2024-06-14 12:16:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:16:09,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:16:09,494 INFO L175 Difference]: Start difference. First operand has 229 places, 342 transitions, 5438 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:16:09,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 374 transitions, 6613 flow [2024-06-14 12:16:10,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 374 transitions, 6256 flow, removed 110 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:10,376 INFO L231 Difference]: Finished difference. Result has 231 places, 352 transitions, 5495 flow [2024-06-14 12:16:10,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5495, PETRI_PLACES=231, PETRI_TRANSITIONS=352} [2024-06-14 12:16:10,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 12:16:10,376 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 352 transitions, 5495 flow [2024-06-14 12:16:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:10,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:10,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:10,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:16:10,377 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:10,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2075833492, now seen corresponding path program 2 times [2024-06-14 12:16:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:10,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214031541] [2024-06-14 12:16:10,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:10,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:11,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214031541] [2024-06-14 12:16:11,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214031541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:11,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:11,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10995342] [2024-06-14 12:16:11,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:11,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:11,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:11,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:11,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:11,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:11,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 352 transitions, 5495 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:11,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:11,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:11,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:12,549 INFO L124 PetriNetUnfolderBase]: 4032/6107 cut-off events. [2024-06-14 12:16:12,549 INFO L125 PetriNetUnfolderBase]: For 486108/486116 co-relation queries the response was YES. [2024-06-14 12:16:12,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54003 conditions, 6107 events. 4032/6107 cut-off events. For 486108/486116 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33166 event pairs, 884 based on Foata normal form. 12/6118 useless extension candidates. Maximal degree in co-relation 53892. Up to 5922 conditions per place. [2024-06-14 12:16:12,615 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 303 selfloop transitions, 69 changer transitions 0/375 dead transitions. [2024-06-14 12:16:12,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 375 transitions, 6537 flow [2024-06-14 12:16:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:16:12,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 12:16:12,617 INFO L175 Difference]: Start difference. First operand has 231 places, 352 transitions, 5495 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:16:12,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 375 transitions, 6537 flow [2024-06-14 12:16:13,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 375 transitions, 6356 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:13,710 INFO L231 Difference]: Finished difference. Result has 234 places, 357 transitions, 5596 flow [2024-06-14 12:16:13,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5596, PETRI_PLACES=234, PETRI_TRANSITIONS=357} [2024-06-14 12:16:13,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 12:16:13,711 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 357 transitions, 5596 flow [2024-06-14 12:16:13,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:13,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:13,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:13,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:16:13,711 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:13,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1106080986, now seen corresponding path program 1 times [2024-06-14 12:16:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:13,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427056205] [2024-06-14 12:16:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:14,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:14,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427056205] [2024-06-14 12:16:14,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427056205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:14,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:14,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117812631] [2024-06-14 12:16:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:14,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:14,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:14,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:14,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 357 transitions, 5596 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:14,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:14,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:15,711 INFO L124 PetriNetUnfolderBase]: 4037/6112 cut-off events. [2024-06-14 12:16:15,712 INFO L125 PetriNetUnfolderBase]: For 496582/496590 co-relation queries the response was YES. [2024-06-14 12:16:15,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54290 conditions, 6112 events. 4037/6112 cut-off events. For 496582/496590 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33141 event pairs, 928 based on Foata normal form. 9/6120 useless extension candidates. Maximal degree in co-relation 54178. Up to 6043 conditions per place. [2024-06-14 12:16:15,781 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 350 selfloop transitions, 29 changer transitions 0/382 dead transitions. [2024-06-14 12:16:15,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 6608 flow [2024-06-14 12:16:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:16:15,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:16:15,782 INFO L175 Difference]: Start difference. First operand has 234 places, 357 transitions, 5596 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:16:15,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 6608 flow [2024-06-14 12:16:16,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 382 transitions, 6462 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:16,644 INFO L231 Difference]: Finished difference. Result has 238 places, 366 transitions, 5632 flow [2024-06-14 12:16:16,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=238, PETRI_TRANSITIONS=366} [2024-06-14 12:16:16,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 12:16:16,644 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 366 transitions, 5632 flow [2024-06-14 12:16:16,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:16,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:16,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:16,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:16:16,645 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)] === [2024-06-14 12:16:16,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:16,645 INFO L85 PathProgramCache]: Analyzing trace with hash 60445009, now seen corresponding path program 2 times [2024-06-14 12:16:16,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:16,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540416078] [2024-06-14 12:16:16,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:16,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:17,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:17,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540416078] [2024-06-14 12:16:17,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540416078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:17,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:17,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923990988] [2024-06-14 12:16:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:17,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:17,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:17,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:17,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 366 transitions, 5632 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:17,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:17,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:18,802 INFO L124 PetriNetUnfolderBase]: 4281/6508 cut-off events. [2024-06-14 12:16:18,802 INFO L125 PetriNetUnfolderBase]: For 610769/610785 co-relation queries the response was YES. [2024-06-14 12:16:18,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59785 conditions, 6508 events. 4281/6508 cut-off events. For 610769/610785 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35935 event pairs, 776 based on Foata normal form. 37/6544 useless extension candidates. Maximal degree in co-relation 59671. Up to 3653 conditions per place. [2024-06-14 12:16:18,879 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 208 changer transitions 0/413 dead transitions. [2024-06-14 12:16:18,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 413 transitions, 7260 flow [2024-06-14 12:16:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:16:18,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:16:18,880 INFO L175 Difference]: Start difference. First operand has 238 places, 366 transitions, 5632 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:16:18,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 413 transitions, 7260 flow [2024-06-14 12:16:19,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 413 transitions, 7205 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 12:16:19,671 INFO L231 Difference]: Finished difference. Result has 245 places, 370 transitions, 6220 flow [2024-06-14 12:16:19,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6220, PETRI_PLACES=245, PETRI_TRANSITIONS=370} [2024-06-14 12:16:19,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 12:16:19,672 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 370 transitions, 6220 flow [2024-06-14 12:16:19,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:19,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:19,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:16:19,672 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)] === [2024-06-14 12:16:19,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1142798431, now seen corresponding path program 8 times [2024-06-14 12:16:19,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:19,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321899104] [2024-06-14 12:16:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:19,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:20,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:20,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321899104] [2024-06-14 12:16:20,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321899104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:20,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:20,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:16:20,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881256588] [2024-06-14 12:16:20,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:20,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:16:20,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:16:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:16:20,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:20,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 370 transitions, 6220 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:20,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:20,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:20,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:22,220 INFO L124 PetriNetUnfolderBase]: 4619/7018 cut-off events. [2024-06-14 12:16:22,220 INFO L125 PetriNetUnfolderBase]: For 644370/644378 co-relation queries the response was YES. [2024-06-14 12:16:22,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66395 conditions, 7018 events. 4619/7018 cut-off events. For 644370/644378 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 39534 event pairs, 988 based on Foata normal form. 14/7031 useless extension candidates. Maximal degree in co-relation 66278. Up to 6484 conditions per place. [2024-06-14 12:16:22,309 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 351 selfloop transitions, 126 changer transitions 0/480 dead transitions. [2024-06-14 12:16:22,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 480 transitions, 8967 flow [2024-06-14 12:16:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:16:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:16:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-14 12:16:22,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:16:22,311 INFO L175 Difference]: Start difference. First operand has 245 places, 370 transitions, 6220 flow. Second operand 10 states and 175 transitions. [2024-06-14 12:16:22,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 480 transitions, 8967 flow [2024-06-14 12:16:23,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 480 transitions, 8596 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:23,788 INFO L231 Difference]: Finished difference. Result has 254 places, 430 transitions, 7546 flow [2024-06-14 12:16:23,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7546, PETRI_PLACES=254, PETRI_TRANSITIONS=430} [2024-06-14 12:16:23,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 12:16:23,789 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 430 transitions, 7546 flow [2024-06-14 12:16:23,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:23,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:23,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:23,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:16:23,790 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)] === [2024-06-14 12:16:23,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:23,790 INFO L85 PathProgramCache]: Analyzing trace with hash -16404777, now seen corresponding path program 3 times [2024-06-14 12:16:23,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:23,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139260933] [2024-06-14 12:16:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:23,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139260933] [2024-06-14 12:16:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139260933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767065260] [2024-06-14 12:16:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:24,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:24,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:24,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:24,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 430 transitions, 7546 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:24,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:24,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:24,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:26,221 INFO L124 PetriNetUnfolderBase]: 4755/7244 cut-off events. [2024-06-14 12:16:26,222 INFO L125 PetriNetUnfolderBase]: For 725455/725467 co-relation queries the response was YES. [2024-06-14 12:16:26,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69502 conditions, 7244 events. 4755/7244 cut-off events. For 725455/725467 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41262 event pairs, 963 based on Foata normal form. 48/7291 useless extension candidates. Maximal degree in co-relation 69379. Up to 5852 conditions per place. [2024-06-14 12:16:26,326 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 207 changer transitions 0/470 dead transitions. [2024-06-14 12:16:26,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 470 transitions, 8988 flow [2024-06-14 12:16:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:16:26,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:16:26,328 INFO L175 Difference]: Start difference. First operand has 254 places, 430 transitions, 7546 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:16:26,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 470 transitions, 8988 flow [2024-06-14 12:16:27,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 470 transitions, 8785 flow, removed 97 selfloop flow, removed 2 redundant places. [2024-06-14 12:16:27,967 INFO L231 Difference]: Finished difference. Result has 261 places, 433 transitions, 7917 flow [2024-06-14 12:16:27,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7917, PETRI_PLACES=261, PETRI_TRANSITIONS=433} [2024-06-14 12:16:27,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-14 12:16:27,967 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 433 transitions, 7917 flow [2024-06-14 12:16:27,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:27,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:27,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:27,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:16:27,968 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)] === [2024-06-14 12:16:27,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:27,969 INFO L85 PathProgramCache]: Analyzing trace with hash 60185539, now seen corresponding path program 4 times [2024-06-14 12:16:27,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:27,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740358292] [2024-06-14 12:16:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:27,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:28,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740358292] [2024-06-14 12:16:28,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740358292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:28,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:28,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990713434] [2024-06-14 12:16:28,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:28,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:28,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:28,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:28,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:28,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 433 transitions, 7917 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:28,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:28,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:28,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:30,447 INFO L124 PetriNetUnfolderBase]: 4935/7539 cut-off events. [2024-06-14 12:16:30,448 INFO L125 PetriNetUnfolderBase]: For 780931/780943 co-relation queries the response was YES. [2024-06-14 12:16:30,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74090 conditions, 7539 events. 4935/7539 cut-off events. For 780931/780943 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43432 event pairs, 1007 based on Foata normal form. 36/7574 useless extension candidates. Maximal degree in co-relation 73965. Up to 5668 conditions per place. [2024-06-14 12:16:30,534 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 214 changer transitions 0/479 dead transitions. [2024-06-14 12:16:30,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 479 transitions, 9701 flow [2024-06-14 12:16:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:16:30,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:16:30,536 INFO L175 Difference]: Start difference. First operand has 261 places, 433 transitions, 7917 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:16:30,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 479 transitions, 9701 flow [2024-06-14 12:16:32,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 479 transitions, 9183 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:32,353 INFO L231 Difference]: Finished difference. Result has 263 places, 437 transitions, 8071 flow [2024-06-14 12:16:32,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7399, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8071, PETRI_PLACES=263, PETRI_TRANSITIONS=437} [2024-06-14 12:16:32,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 12:16:32,354 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 437 transitions, 8071 flow [2024-06-14 12:16:32,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:32,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:32,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:32,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:16:32,354 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)] === [2024-06-14 12:16:32,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:32,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1322962239, now seen corresponding path program 9 times [2024-06-14 12:16:32,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:32,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516356311] [2024-06-14 12:16:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:32,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:33,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:33,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516356311] [2024-06-14 12:16:33,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516356311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:33,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:33,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:16:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518438607] [2024-06-14 12:16:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:16:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:16:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:16:33,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:33,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 437 transitions, 8071 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:33,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:33,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:33,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:35,195 INFO L124 PetriNetUnfolderBase]: 4963/7583 cut-off events. [2024-06-14 12:16:35,195 INFO L125 PetriNetUnfolderBase]: For 762094/762106 co-relation queries the response was YES. [2024-06-14 12:16:35,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74140 conditions, 7583 events. 4963/7583 cut-off events. For 762094/762106 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43665 event pairs, 1052 based on Foata normal form. 18/7600 useless extension candidates. Maximal degree in co-relation 74014. Up to 6352 conditions per place. [2024-06-14 12:16:35,295 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 287 selfloop transitions, 185 changer transitions 0/475 dead transitions. [2024-06-14 12:16:35,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 475 transitions, 9749 flow [2024-06-14 12:16:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:16:35,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:16:35,297 INFO L175 Difference]: Start difference. First operand has 263 places, 437 transitions, 8071 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:16:35,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 475 transitions, 9749 flow [2024-06-14 12:16:36,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 475 transitions, 9358 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:36,940 INFO L231 Difference]: Finished difference. Result has 267 places, 440 transitions, 8218 flow [2024-06-14 12:16:36,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7680, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8218, PETRI_PLACES=267, PETRI_TRANSITIONS=440} [2024-06-14 12:16:36,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 12:16:36,940 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 440 transitions, 8218 flow [2024-06-14 12:16:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:36,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:16:36,941 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:36,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1747383, now seen corresponding path program 10 times [2024-06-14 12:16:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600752555] [2024-06-14 12:16:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:38,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600752555] [2024-06-14 12:16:38,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600752555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:38,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:38,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:16:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449774066] [2024-06-14 12:16:38,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:38,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:16:38,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:16:38,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:16:38,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 440 transitions, 8218 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:38,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:39,993 INFO L124 PetriNetUnfolderBase]: 5246/8024 cut-off events. [2024-06-14 12:16:39,993 INFO L125 PetriNetUnfolderBase]: For 869606/869618 co-relation queries the response was YES. [2024-06-14 12:16:40,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81501 conditions, 8024 events. 5246/8024 cut-off events. For 869606/869618 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 46946 event pairs, 1154 based on Foata normal form. 18/8041 useless extension candidates. Maximal degree in co-relation 81373. Up to 6127 conditions per place. [2024-06-14 12:16:40,092 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 295 selfloop transitions, 191 changer transitions 0/489 dead transitions. [2024-06-14 12:16:40,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 489 transitions, 10416 flow [2024-06-14 12:16:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:40,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:16:40,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:16:40,108 INFO L175 Difference]: Start difference. First operand has 267 places, 440 transitions, 8218 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:16:40,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 489 transitions, 10416 flow [2024-06-14 12:16:41,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 489 transitions, 9936 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:41,591 INFO L231 Difference]: Finished difference. Result has 271 places, 447 transitions, 8470 flow [2024-06-14 12:16:41,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7738, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8470, PETRI_PLACES=271, PETRI_TRANSITIONS=447} [2024-06-14 12:16:41,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 12:16:41,592 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 447 transitions, 8470 flow [2024-06-14 12:16:41,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:41,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:41,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:41,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:16:41,593 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:41,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:41,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1328676531, now seen corresponding path program 5 times [2024-06-14 12:16:41,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:41,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285536955] [2024-06-14 12:16:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:41,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:42,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:42,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285536955] [2024-06-14 12:16:42,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285536955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:42,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:42,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:42,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098210884] [2024-06-14 12:16:42,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:42,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:42,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 447 transitions, 8470 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:42,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:42,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:42,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:44,495 INFO L124 PetriNetUnfolderBase]: 5190/7944 cut-off events. [2024-06-14 12:16:44,495 INFO L125 PetriNetUnfolderBase]: For 886399/886411 co-relation queries the response was YES. [2024-06-14 12:16:44,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79352 conditions, 7944 events. 5190/7944 cut-off events. For 886399/886411 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46339 event pairs, 1154 based on Foata normal form. 48/7991 useless extension candidates. Maximal degree in co-relation 79222. Up to 6535 conditions per place. [2024-06-14 12:16:44,655 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 301 selfloop transitions, 183 changer transitions 0/487 dead transitions. [2024-06-14 12:16:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 487 transitions, 10059 flow [2024-06-14 12:16:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:16:44,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:16:44,657 INFO L175 Difference]: Start difference. First operand has 271 places, 447 transitions, 8470 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:16:44,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 487 transitions, 10059 flow [2024-06-14 12:16:46,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 487 transitions, 9564 flow, removed 113 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:46,609 INFO L231 Difference]: Finished difference. Result has 274 places, 449 transitions, 8474 flow [2024-06-14 12:16:46,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8474, PETRI_PLACES=274, PETRI_TRANSITIONS=449} [2024-06-14 12:16:46,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-14 12:16:46,609 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 449 transitions, 8474 flow [2024-06-14 12:16:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:46,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:46,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:46,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:16:46,610 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:46,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1328683971, now seen corresponding path program 6 times [2024-06-14 12:16:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280378950] [2024-06-14 12:16:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:47,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:47,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280378950] [2024-06-14 12:16:47,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280378950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:47,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:47,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613405253] [2024-06-14 12:16:47,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:47,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:47,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:47,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:47,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:47,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 449 transitions, 8474 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:47,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:47,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:47,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:49,703 INFO L124 PetriNetUnfolderBase]: 5210/7988 cut-off events. [2024-06-14 12:16:49,704 INFO L125 PetriNetUnfolderBase]: For 867064/867076 co-relation queries the response was YES. [2024-06-14 12:16:49,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78731 conditions, 7988 events. 5210/7988 cut-off events. For 867064/867076 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46813 event pairs, 1111 based on Foata normal form. 36/8023 useless extension candidates. Maximal degree in co-relation 78600. Up to 6063 conditions per place. [2024-06-14 12:16:49,863 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 190 changer transitions 0/494 dead transitions. [2024-06-14 12:16:49,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 494 transitions, 10340 flow [2024-06-14 12:16:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:16:49,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 12:16:49,865 INFO L175 Difference]: Start difference. First operand has 274 places, 449 transitions, 8474 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:16:49,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 494 transitions, 10340 flow [2024-06-14 12:16:51,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 494 transitions, 9868 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:51,632 INFO L231 Difference]: Finished difference. Result has 276 places, 451 transitions, 8517 flow [2024-06-14 12:16:51,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8010, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8517, PETRI_PLACES=276, PETRI_TRANSITIONS=451} [2024-06-14 12:16:51,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 12:16:51,634 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 451 transitions, 8517 flow [2024-06-14 12:16:51,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:51,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:51,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:16:51,634 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)] === [2024-06-14 12:16:51,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2032331226, now seen corresponding path program 2 times [2024-06-14 12:16:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264896725] [2024-06-14 12:16:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:52,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264896725] [2024-06-14 12:16:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264896725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:52,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:52,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245056401] [2024-06-14 12:16:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:52,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:52,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:52,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:52,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 451 transitions, 8517 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:52,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:52,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:52,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:55,000 INFO L124 PetriNetUnfolderBase]: 5215/7993 cut-off events. [2024-06-14 12:16:55,000 INFO L125 PetriNetUnfolderBase]: For 826153/826161 co-relation queries the response was YES. [2024-06-14 12:16:55,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77948 conditions, 7993 events. 5215/7993 cut-off events. For 826153/826161 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46961 event pairs, 1316 based on Foata normal form. 9/8001 useless extension candidates. Maximal degree in co-relation 77816. Up to 7906 conditions per place. [2024-06-14 12:16:55,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 35 changer transitions 0/464 dead transitions. [2024-06-14 12:16:55,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 464 transitions, 9633 flow [2024-06-14 12:16:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:16:55,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-14 12:16:55,125 INFO L175 Difference]: Start difference. First operand has 276 places, 451 transitions, 8517 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:16:55,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 464 transitions, 9633 flow [2024-06-14 12:16:57,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 464 transitions, 8971 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:57,187 INFO L231 Difference]: Finished difference. Result has 275 places, 454 transitions, 7973 flow [2024-06-14 12:16:57,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7973, PETRI_PLACES=275, PETRI_TRANSITIONS=454} [2024-06-14 12:16:57,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 12:16:57,188 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 454 transitions, 7973 flow [2024-06-14 12:16:57,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:57,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:57,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:57,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:16:57,189 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)] === [2024-06-14 12:16:57,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1864454682, now seen corresponding path program 3 times [2024-06-14 12:16:57,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:57,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480908043] [2024-06-14 12:16:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:57,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480908043] [2024-06-14 12:16:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480908043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:57,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137760632] [2024-06-14 12:16:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:57,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:57,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 454 transitions, 7973 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:57,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:57,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:57,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:59,763 INFO L124 PetriNetUnfolderBase]: 5212/7989 cut-off events. [2024-06-14 12:16:59,763 INFO L125 PetriNetUnfolderBase]: For 817320/817328 co-relation queries the response was YES. [2024-06-14 12:16:59,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75325 conditions, 7989 events. 5212/7989 cut-off events. For 817320/817328 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46936 event pairs, 1316 based on Foata normal form. 9/7997 useless extension candidates. Maximal degree in co-relation 75193. Up to 7903 conditions per place. [2024-06-14 12:16:59,886 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 38 changer transitions 0/463 dead transitions. [2024-06-14 12:16:59,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 463 transitions, 8919 flow [2024-06-14 12:16:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:16:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:16:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:16:59,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-14 12:16:59,891 INFO L175 Difference]: Start difference. First operand has 275 places, 454 transitions, 7973 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:16:59,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 463 transitions, 8919 flow [2024-06-14 12:17:01,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 463 transitions, 8805 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:01,650 INFO L231 Difference]: Finished difference. Result has 278 places, 454 transitions, 7941 flow [2024-06-14 12:17:01,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7941, PETRI_PLACES=278, PETRI_TRANSITIONS=454} [2024-06-14 12:17:01,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-14 12:17:01,651 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 454 transitions, 7941 flow [2024-06-14 12:17:01,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:01,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:01,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:01,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:17:01,652 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)] === [2024-06-14 12:17:01,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -150689580, now seen corresponding path program 3 times [2024-06-14 12:17:01,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:01,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850434605] [2024-06-14 12:17:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850434605] [2024-06-14 12:17:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850434605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:02,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414783020] [2024-06-14 12:17:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 454 transitions, 7941 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:02,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:04,197 INFO L124 PetriNetUnfolderBase]: 5206/7983 cut-off events. [2024-06-14 12:17:04,197 INFO L125 PetriNetUnfolderBase]: For 837345/837357 co-relation queries the response was YES. [2024-06-14 12:17:04,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75399 conditions, 7983 events. 5206/7983 cut-off events. For 837345/837357 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46805 event pairs, 1257 based on Foata normal form. 14/7996 useless extension candidates. Maximal degree in co-relation 75266. Up to 7747 conditions per place. [2024-06-14 12:17:04,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 370 selfloop transitions, 91 changer transitions 0/464 dead transitions. [2024-06-14 12:17:04,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 464 transitions, 8896 flow [2024-06-14 12:17:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:17:04,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-14 12:17:04,311 INFO L175 Difference]: Start difference. First operand has 278 places, 454 transitions, 7941 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:17:04,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 464 transitions, 8896 flow [2024-06-14 12:17:06,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 464 transitions, 8798 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:06,265 INFO L231 Difference]: Finished difference. Result has 280 places, 454 transitions, 8033 flow [2024-06-14 12:17:06,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8033, PETRI_PLACES=280, PETRI_TRANSITIONS=454} [2024-06-14 12:17:06,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-14 12:17:06,266 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 454 transitions, 8033 flow [2024-06-14 12:17:06,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:06,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:06,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:06,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:17:06,267 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:06,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash 974016169, now seen corresponding path program 11 times [2024-06-14 12:17:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:06,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120234883] [2024-06-14 12:17:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:07,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:07,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120234883] [2024-06-14 12:17:07,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120234883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:07,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:07,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:17:07,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089045278] [2024-06-14 12:17:07,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:07,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:17:07,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:17:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:17:07,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:07,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 454 transitions, 8033 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:07,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:07,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:07,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:09,530 INFO L124 PetriNetUnfolderBase]: 5458/8368 cut-off events. [2024-06-14 12:17:09,530 INFO L125 PetriNetUnfolderBase]: For 899100/899108 co-relation queries the response was YES. [2024-06-14 12:17:09,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79216 conditions, 8368 events. 5458/8368 cut-off events. For 899100/899108 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49485 event pairs, 1006 based on Foata normal form. 14/8381 useless extension candidates. Maximal degree in co-relation 79082. Up to 7576 conditions per place. [2024-06-14 12:17:09,693 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 377 selfloop transitions, 156 changer transitions 0/536 dead transitions. [2024-06-14 12:17:09,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 536 transitions, 10442 flow [2024-06-14 12:17:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:17:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:17:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 12:17:09,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-14 12:17:09,695 INFO L175 Difference]: Start difference. First operand has 280 places, 454 transitions, 8033 flow. Second operand 10 states and 172 transitions. [2024-06-14 12:17:09,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 536 transitions, 10442 flow [2024-06-14 12:17:12,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 536 transitions, 10174 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:12,472 INFO L231 Difference]: Finished difference. Result has 286 places, 493 transitions, 9051 flow [2024-06-14 12:17:12,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9051, PETRI_PLACES=286, PETRI_TRANSITIONS=493} [2024-06-14 12:17:12,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 12:17:12,474 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 493 transitions, 9051 flow [2024-06-14 12:17:12,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:12,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:17:12,474 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)] === [2024-06-14 12:17:12,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2041817400, now seen corresponding path program 1 times [2024-06-14 12:17:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819584406] [2024-06-14 12:17:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:13,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:13,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819584406] [2024-06-14 12:17:13,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819584406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:13,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:13,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586688033] [2024-06-14 12:17:13,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:13,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:13,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 493 transitions, 9051 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:13,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:13,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:13,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:15,033 INFO L124 PetriNetUnfolderBase]: 5306/8240 cut-off events. [2024-06-14 12:17:15,033 INFO L125 PetriNetUnfolderBase]: For 855187/855187 co-relation queries the response was YES. [2024-06-14 12:17:15,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78345 conditions, 8240 events. 5306/8240 cut-off events. For 855187/855187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49942 event pairs, 1419 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 78207. Up to 8001 conditions per place. [2024-06-14 12:17:15,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 29 changer transitions 0/519 dead transitions. [2024-06-14 12:17:15,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 519 transitions, 10467 flow [2024-06-14 12:17:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 12:17:15,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-14 12:17:15,172 INFO L175 Difference]: Start difference. First operand has 286 places, 493 transitions, 9051 flow. Second operand 7 states and 120 transitions. [2024-06-14 12:17:15,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 519 transitions, 10467 flow [2024-06-14 12:17:17,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 519 transitions, 10140 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:17,809 INFO L231 Difference]: Finished difference. Result has 289 places, 503 transitions, 8986 flow [2024-06-14 12:17:17,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8986, PETRI_PLACES=289, PETRI_TRANSITIONS=503} [2024-06-14 12:17:17,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-14 12:17:17,810 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 503 transitions, 8986 flow [2024-06-14 12:17:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:17,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:17:17,811 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)] === [2024-06-14 12:17:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 764018244, now seen corresponding path program 2 times [2024-06-14 12:17:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570164605] [2024-06-14 12:17:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:18,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:18,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570164605] [2024-06-14 12:17:18,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570164605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:18,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:18,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:18,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648337170] [2024-06-14 12:17:18,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:18,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:18,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 503 transitions, 8986 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:18,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:18,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:18,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:20,483 INFO L124 PetriNetUnfolderBase]: 5316/8255 cut-off events. [2024-06-14 12:17:20,483 INFO L125 PetriNetUnfolderBase]: For 868516/868516 co-relation queries the response was YES. [2024-06-14 12:17:20,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78593 conditions, 8255 events. 5316/8255 cut-off events. For 868516/868516 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50009 event pairs, 1419 based on Foata normal form. 3/8251 useless extension candidates. Maximal degree in co-relation 78453. Up to 8087 conditions per place. [2024-06-14 12:17:20,648 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 17 changer transitions 0/516 dead transitions. [2024-06-14 12:17:20,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 516 transitions, 10102 flow [2024-06-14 12:17:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:17:20,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-14 12:17:20,650 INFO L175 Difference]: Start difference. First operand has 289 places, 503 transitions, 8986 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:17:20,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 516 transitions, 10102 flow [2024-06-14 12:17:22,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 516 transitions, 9984 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-14 12:17:22,964 INFO L231 Difference]: Finished difference. Result has 294 places, 506 transitions, 8983 flow [2024-06-14 12:17:22,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8868, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8983, PETRI_PLACES=294, PETRI_TRANSITIONS=506} [2024-06-14 12:17:22,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 12:17:22,965 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 506 transitions, 8983 flow [2024-06-14 12:17:22,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:22,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:22,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:22,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:17:22,966 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)] === [2024-06-14 12:17:22,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1864685880, now seen corresponding path program 3 times [2024-06-14 12:17:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:22,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442651275] [2024-06-14 12:17:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:22,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442651275] [2024-06-14 12:17:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442651275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:23,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:23,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:23,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699618696] [2024-06-14 12:17:23,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:23,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:23,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:23,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:23,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:23,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:17:23,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 506 transitions, 8983 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:23,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:23,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:17:23,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:25,509 INFO L124 PetriNetUnfolderBase]: 5314/8251 cut-off events. [2024-06-14 12:17:25,509 INFO L125 PetriNetUnfolderBase]: For 882979/882979 co-relation queries the response was YES. [2024-06-14 12:17:25,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78626 conditions, 8251 events. 5314/8251 cut-off events. For 882979/882979 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 50030 event pairs, 1418 based on Foata normal form. 2/8246 useless extension candidates. Maximal degree in co-relation 78483. Up to 8076 conditions per place. [2024-06-14 12:17:25,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 490 selfloop transitions, 22 changer transitions 0/520 dead transitions. [2024-06-14 12:17:25,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 520 transitions, 10117 flow [2024-06-14 12:17:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:17:25,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-14 12:17:25,641 INFO L175 Difference]: Start difference. First operand has 294 places, 506 transitions, 8983 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:17:25,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 520 transitions, 10117 flow [2024-06-14 12:17:27,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 520 transitions, 10025 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:27,999 INFO L231 Difference]: Finished difference. Result has 296 places, 509 transitions, 9021 flow [2024-06-14 12:17:28,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9021, PETRI_PLACES=296, PETRI_TRANSITIONS=509} [2024-06-14 12:17:28,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 12:17:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 509 transitions, 9021 flow [2024-06-14 12:17:28,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:28,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:28,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:28,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:17:28,001 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:28,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2082451090, now seen corresponding path program 1 times [2024-06-14 12:17:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:28,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44394225] [2024-06-14 12:17:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:29,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:29,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44394225] [2024-06-14 12:17:29,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44394225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:29,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:17:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953321053] [2024-06-14 12:17:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:29,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:17:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:17:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:17:29,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:29,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 509 transitions, 9021 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:29,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:29,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:29,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:31,772 INFO L124 PetriNetUnfolderBase]: 5578/8555 cut-off events. [2024-06-14 12:17:31,772 INFO L125 PetriNetUnfolderBase]: For 1042032/1042040 co-relation queries the response was YES. [2024-06-14 12:17:31,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83560 conditions, 8555 events. 5578/8555 cut-off events. For 1042032/1042040 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51063 event pairs, 1221 based on Foata normal form. 26/8580 useless extension candidates. Maximal degree in co-relation 83417. Up to 7793 conditions per place. [2024-06-14 12:17:31,895 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 418 selfloop transitions, 137 changer transitions 0/558 dead transitions. [2024-06-14 12:17:31,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 558 transitions, 10722 flow [2024-06-14 12:17:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:17:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:17:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 12:17:31,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 12:17:31,897 INFO L175 Difference]: Start difference. First operand has 296 places, 509 transitions, 9021 flow. Second operand 11 states and 182 transitions. [2024-06-14 12:17:31,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 558 transitions, 10722 flow [2024-06-14 12:17:34,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 558 transitions, 10618 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:34,168 INFO L231 Difference]: Finished difference. Result has 302 places, 511 transitions, 9329 flow [2024-06-14 12:17:34,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9329, PETRI_PLACES=302, PETRI_TRANSITIONS=511} [2024-06-14 12:17:34,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-14 12:17:34,169 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 511 transitions, 9329 flow [2024-06-14 12:17:34,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:34,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:34,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:34,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:17:34,170 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:34,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash -405199562, now seen corresponding path program 2 times [2024-06-14 12:17:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:34,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427089164] [2024-06-14 12:17:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:35,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427089164] [2024-06-14 12:17:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427089164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:35,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:35,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:17:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639313421] [2024-06-14 12:17:35,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:35,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:17:35,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:35,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:17:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:17:35,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:35,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 511 transitions, 9329 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:35,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:35,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:35,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:37,858 INFO L124 PetriNetUnfolderBase]: 5646/8677 cut-off events. [2024-06-14 12:17:37,859 INFO L125 PetriNetUnfolderBase]: For 1074293/1074297 co-relation queries the response was YES. [2024-06-14 12:17:37,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85538 conditions, 8677 events. 5646/8677 cut-off events. For 1074293/1074297 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52155 event pairs, 1406 based on Foata normal form. 22/8698 useless extension candidates. Maximal degree in co-relation 85394. Up to 8019 conditions per place. [2024-06-14 12:17:38,002 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 431 selfloop transitions, 121 changer transitions 0/555 dead transitions. [2024-06-14 12:17:38,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 555 transitions, 10995 flow [2024-06-14 12:17:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:17:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:17:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:17:38,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 12:17:38,004 INFO L175 Difference]: Start difference. First operand has 302 places, 511 transitions, 9329 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:17:38,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 555 transitions, 10995 flow [2024-06-14 12:17:40,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 555 transitions, 10617 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-14 12:17:40,841 INFO L231 Difference]: Finished difference. Result has 303 places, 513 transitions, 9332 flow [2024-06-14 12:17:40,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8951, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9332, PETRI_PLACES=303, PETRI_TRANSITIONS=513} [2024-06-14 12:17:40,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 12:17:40,842 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 513 transitions, 9332 flow [2024-06-14 12:17:40,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:40,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:40,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:40,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:17:40,843 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:40,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2024243320, now seen corresponding path program 3 times [2024-06-14 12:17:40,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:40,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699786805] [2024-06-14 12:17:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:42,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699786805] [2024-06-14 12:17:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699786805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:42,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:42,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:42,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16783780] [2024-06-14 12:17:42,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:42,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:42,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:42,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:42,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:42,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 513 transitions, 9332 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:42,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:42,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:42,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:44,561 INFO L124 PetriNetUnfolderBase]: 5620/8633 cut-off events. [2024-06-14 12:17:44,561 INFO L125 PetriNetUnfolderBase]: For 1065795/1065803 co-relation queries the response was YES. [2024-06-14 12:17:44,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83690 conditions, 8633 events. 5620/8633 cut-off events. For 1065795/1065803 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51725 event pairs, 1317 based on Foata normal form. 26/8658 useless extension candidates. Maximal degree in co-relation 83545. Up to 7836 conditions per place. [2024-06-14 12:17:44,668 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 140 changer transitions 0/550 dead transitions. [2024-06-14 12:17:44,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 550 transitions, 10739 flow [2024-06-14 12:17:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:17:44,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:17:44,670 INFO L175 Difference]: Start difference. First operand has 303 places, 513 transitions, 9332 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:17:44,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 550 transitions, 10739 flow [2024-06-14 12:17:46,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 10351 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:46,749 INFO L231 Difference]: Finished difference. Result has 306 places, 515 transitions, 9289 flow [2024-06-14 12:17:46,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9289, PETRI_PLACES=306, PETRI_TRANSITIONS=515} [2024-06-14 12:17:46,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 12:17:46,750 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 515 transitions, 9289 flow [2024-06-14 12:17:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:46,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:46,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:46,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:17:46,750 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)] === [2024-06-14 12:17:46,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash -79379753, now seen corresponding path program 1 times [2024-06-14 12:17:46,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:46,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078369110] [2024-06-14 12:17:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:46,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:47,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:47,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078369110] [2024-06-14 12:17:47,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078369110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:47,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:47,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:47,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400494043] [2024-06-14 12:17:47,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:47,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:47,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:47,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:47,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:47,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 515 transitions, 9289 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:47,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:47,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:47,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:49,647 INFO L124 PetriNetUnfolderBase]: 5622/8638 cut-off events. [2024-06-14 12:17:49,647 INFO L125 PetriNetUnfolderBase]: For 1030584/1030588 co-relation queries the response was YES. [2024-06-14 12:17:49,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83278 conditions, 8638 events. 5622/8638 cut-off events. For 1030584/1030588 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51796 event pairs, 1444 based on Foata normal form. 6/8643 useless extension candidates. Maximal degree in co-relation 83131. Up to 8513 conditions per place. [2024-06-14 12:17:49,829 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 39 changer transitions 0/536 dead transitions. [2024-06-14 12:17:49,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 536 transitions, 10632 flow [2024-06-14 12:17:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:17:49,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:17:49,831 INFO L175 Difference]: Start difference. First operand has 306 places, 515 transitions, 9289 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:17:49,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 536 transitions, 10632 flow [2024-06-14 12:17:52,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 536 transitions, 10288 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:52,276 INFO L231 Difference]: Finished difference. Result has 306 places, 518 transitions, 9102 flow [2024-06-14 12:17:52,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8949, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9102, PETRI_PLACES=306, PETRI_TRANSITIONS=518} [2024-06-14 12:17:52,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 12:17:52,276 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 518 transitions, 9102 flow [2024-06-14 12:17:52,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:52,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:52,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:52,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:17:52,277 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)] === [2024-06-14 12:17:52,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:52,277 INFO L85 PathProgramCache]: Analyzing trace with hash -73665833, now seen corresponding path program 2 times [2024-06-14 12:17:52,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:52,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930556565] [2024-06-14 12:17:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:52,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:52,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:52,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930556565] [2024-06-14 12:17:52,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930556565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:52,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:52,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:17:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763180579] [2024-06-14 12:17:52,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:52,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:17:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:17:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:17:53,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:53,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 518 transitions, 9102 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:53,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:53,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:53,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:55,374 INFO L124 PetriNetUnfolderBase]: 5627/8645 cut-off events. [2024-06-14 12:17:55,375 INFO L125 PetriNetUnfolderBase]: For 1047824/1047828 co-relation queries the response was YES. [2024-06-14 12:17:55,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82934 conditions, 8645 events. 5627/8645 cut-off events. For 1047824/1047828 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51835 event pairs, 1442 based on Foata normal form. 5/8649 useless extension candidates. Maximal degree in co-relation 82786. Up to 8561 conditions per place. [2024-06-14 12:17:55,502 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 501 selfloop transitions, 31 changer transitions 0/535 dead transitions. [2024-06-14 12:17:55,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 535 transitions, 10285 flow [2024-06-14 12:17:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:17:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:17:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:17:55,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-14 12:17:55,504 INFO L175 Difference]: Start difference. First operand has 306 places, 518 transitions, 9102 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:17:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 535 transitions, 10285 flow [2024-06-14 12:17:58,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 535 transitions, 10211 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:58,686 INFO L231 Difference]: Finished difference. Result has 309 places, 521 transitions, 9175 flow [2024-06-14 12:17:58,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9030, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9175, PETRI_PLACES=309, PETRI_TRANSITIONS=521} [2024-06-14 12:17:58,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-14 12:17:58,688 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 521 transitions, 9175 flow [2024-06-14 12:17:58,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:58,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:58,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:58,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:17:58,688 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:58,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash -294971688, now seen corresponding path program 4 times [2024-06-14 12:17:58,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:58,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072784368] [2024-06-14 12:17:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:58,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:59,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:59,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072784368] [2024-06-14 12:17:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072784368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:59,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:17:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141514187] [2024-06-14 12:17:59,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:59,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:17:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:17:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:18:00,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:00,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 521 transitions, 9175 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:00,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:00,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:00,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:02,096 INFO L124 PetriNetUnfolderBase]: 5695/8759 cut-off events. [2024-06-14 12:18:02,096 INFO L125 PetriNetUnfolderBase]: For 1126952/1126960 co-relation queries the response was YES. [2024-06-14 12:18:02,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84468 conditions, 8759 events. 5695/8759 cut-off events. For 1126952/1126960 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52678 event pairs, 1340 based on Foata normal form. 26/8784 useless extension candidates. Maximal degree in co-relation 84319. Up to 7701 conditions per place. [2024-06-14 12:18:02,236 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 142 changer transitions 0/560 dead transitions. [2024-06-14 12:18:02,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 560 transitions, 10874 flow [2024-06-14 12:18:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:18:02,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:18:02,237 INFO L175 Difference]: Start difference. First operand has 309 places, 521 transitions, 9175 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:18:02,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 560 transitions, 10874 flow [2024-06-14 12:18:04,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 560 transitions, 10800 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:04,834 INFO L231 Difference]: Finished difference. Result has 314 places, 524 transitions, 9584 flow [2024-06-14 12:18:04,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9584, PETRI_PLACES=314, PETRI_TRANSITIONS=524} [2024-06-14 12:18:04,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 12:18:04,835 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 524 transitions, 9584 flow [2024-06-14 12:18:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:04,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:04,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:04,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:18:04,836 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)] === [2024-06-14 12:18:04,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash -849650762, now seen corresponding path program 1 times [2024-06-14 12:18:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592244410] [2024-06-14 12:18:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:04,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:05,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:05,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592244410] [2024-06-14 12:18:05,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592244410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:05,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:05,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:05,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194252736] [2024-06-14 12:18:05,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:05,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:05,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:05,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:05,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 524 transitions, 9584 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:05,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:05,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:08,264 INFO L124 PetriNetUnfolderBase]: 5705/8779 cut-off events. [2024-06-14 12:18:08,264 INFO L125 PetriNetUnfolderBase]: For 1120343/1120347 co-relation queries the response was YES. [2024-06-14 12:18:08,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85790 conditions, 8779 events. 5705/8779 cut-off events. For 1120343/1120347 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52894 event pairs, 1447 based on Foata normal form. 6/8784 useless extension candidates. Maximal degree in co-relation 85639. Up to 8461 conditions per place. [2024-06-14 12:18:08,379 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 103 changer transitions 0/554 dead transitions. [2024-06-14 12:18:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 554 transitions, 11007 flow [2024-06-14 12:18:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:18:08,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:18:08,381 INFO L175 Difference]: Start difference. First operand has 314 places, 524 transitions, 9584 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:18:08,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 554 transitions, 11007 flow [2024-06-14 12:18:11,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 554 transitions, 10623 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 12:18:11,557 INFO L231 Difference]: Finished difference. Result has 316 places, 530 transitions, 9515 flow [2024-06-14 12:18:11,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9202, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9515, PETRI_PLACES=316, PETRI_TRANSITIONS=530} [2024-06-14 12:18:11,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-14 12:18:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 530 transitions, 9515 flow [2024-06-14 12:18:11,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:11,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:11,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:11,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:18:11,558 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)] === [2024-06-14 12:18:11,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash -73657897, now seen corresponding path program 1 times [2024-06-14 12:18:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:11,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762497999] [2024-06-14 12:18:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:11,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:12,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:12,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762497999] [2024-06-14 12:18:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762497999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:12,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:12,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:12,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967200011] [2024-06-14 12:18:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:12,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:12,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:12,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:12,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:12,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:12,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 530 transitions, 9515 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:12,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:12,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:12,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:14,730 INFO L124 PetriNetUnfolderBase]: 5715/8789 cut-off events. [2024-06-14 12:18:14,730 INFO L125 PetriNetUnfolderBase]: For 1105430/1105434 co-relation queries the response was YES. [2024-06-14 12:18:14,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85167 conditions, 8789 events. 5715/8789 cut-off events. For 1105430/1105434 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52957 event pairs, 1466 based on Foata normal form. 6/8794 useless extension candidates. Maximal degree in co-relation 85015. Up to 8669 conditions per place. [2024-06-14 12:18:14,855 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 46 changer transitions 0/554 dead transitions. [2024-06-14 12:18:14,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 554 transitions, 10943 flow [2024-06-14 12:18:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:18:14,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:18:14,857 INFO L175 Difference]: Start difference. First operand has 316 places, 530 transitions, 9515 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:18:14,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 554 transitions, 10943 flow [2024-06-14 12:18:18,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 554 transitions, 10824 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:18,484 INFO L231 Difference]: Finished difference. Result has 320 places, 536 transitions, 9616 flow [2024-06-14 12:18:18,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9616, PETRI_PLACES=320, PETRI_TRANSITIONS=536} [2024-06-14 12:18:18,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 12:18:18,485 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 536 transitions, 9616 flow [2024-06-14 12:18:18,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:18,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:18,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:18,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:18:18,485 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)] === [2024-06-14 12:18:18,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash -73658300, now seen corresponding path program 2 times [2024-06-14 12:18:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:18,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987691904] [2024-06-14 12:18:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:19,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:19,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987691904] [2024-06-14 12:18:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987691904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:19,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:19,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112560129] [2024-06-14 12:18:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:19,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:19,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 536 transitions, 9616 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:19,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:19,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:19,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:22,078 INFO L124 PetriNetUnfolderBase]: 5741/8823 cut-off events. [2024-06-14 12:18:22,079 INFO L125 PetriNetUnfolderBase]: For 1139217/1139225 co-relation queries the response was YES. [2024-06-14 12:18:22,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86111 conditions, 8823 events. 5741/8823 cut-off events. For 1139217/1139225 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53000 event pairs, 1399 based on Foata normal form. 10/8832 useless extension candidates. Maximal degree in co-relation 85957. Up to 8500 conditions per place. [2024-06-14 12:18:22,217 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 109 changer transitions 0/563 dead transitions. [2024-06-14 12:18:22,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 563 transitions, 11185 flow [2024-06-14 12:18:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:18:22,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:18:22,219 INFO L175 Difference]: Start difference. First operand has 320 places, 536 transitions, 9616 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:18:22,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 563 transitions, 11185 flow [2024-06-14 12:18:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 563 transitions, 11088 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:26,207 INFO L231 Difference]: Finished difference. Result has 324 places, 542 transitions, 9815 flow [2024-06-14 12:18:26,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9519, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9815, PETRI_PLACES=324, PETRI_TRANSITIONS=542} [2024-06-14 12:18:26,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-14 12:18:26,208 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 542 transitions, 9815 flow [2024-06-14 12:18:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:26,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:26,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:18:26,209 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)] === [2024-06-14 12:18:26,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash -840396332, now seen corresponding path program 3 times [2024-06-14 12:18:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:26,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838201220] [2024-06-14 12:18:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:26,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:27,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838201220] [2024-06-14 12:18:27,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838201220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:27,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:27,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:27,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871409773] [2024-06-14 12:18:27,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:27,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:27,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:27,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:27,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:27,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 542 transitions, 9815 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:27,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:27,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:27,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:29,695 INFO L124 PetriNetUnfolderBase]: 5735/8815 cut-off events. [2024-06-14 12:18:29,695 INFO L125 PetriNetUnfolderBase]: For 1159770/1159778 co-relation queries the response was YES. [2024-06-14 12:18:29,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86431 conditions, 8815 events. 5735/8815 cut-off events. For 1159770/1159778 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52974 event pairs, 1399 based on Foata normal form. 10/8824 useless extension candidates. Maximal degree in co-relation 86275. Up to 8495 conditions per place. [2024-06-14 12:18:29,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 97 changer transitions 0/564 dead transitions. [2024-06-14 12:18:29,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 564 transitions, 11173 flow [2024-06-14 12:18:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:18:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:18:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:18:29,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:18:29,911 INFO L175 Difference]: Start difference. First operand has 324 places, 542 transitions, 9815 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:18:29,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 564 transitions, 11173 flow [2024-06-14 12:18:34,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 564 transitions, 10981 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:34,061 INFO L231 Difference]: Finished difference. Result has 328 places, 542 transitions, 9828 flow [2024-06-14 12:18:34,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9623, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9828, PETRI_PLACES=328, PETRI_TRANSITIONS=542} [2024-06-14 12:18:34,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-14 12:18:34,062 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 542 transitions, 9828 flow [2024-06-14 12:18:34,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:34,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:34,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:34,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:18:34,062 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)] === [2024-06-14 12:18:34,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1116730071, now seen corresponding path program 3 times [2024-06-14 12:18:34,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:34,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855846428] [2024-06-14 12:18:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:34,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:34,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:34,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855846428] [2024-06-14 12:18:34,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855846428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:34,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:34,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141037310] [2024-06-14 12:18:34,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:34,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:34,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 542 transitions, 9828 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:34,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:34,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:37,307 INFO L124 PetriNetUnfolderBase]: 5745/8832 cut-off events. [2024-06-14 12:18:37,307 INFO L125 PetriNetUnfolderBase]: For 1186159/1186167 co-relation queries the response was YES. [2024-06-14 12:18:37,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86884 conditions, 8832 events. 5745/8832 cut-off events. For 1186159/1186167 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53180 event pairs, 1473 based on Foata normal form. 10/8841 useless extension candidates. Maximal degree in co-relation 86727. Up to 8617 conditions per place. [2024-06-14 12:18:37,469 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 61 changer transitions 0/563 dead transitions. [2024-06-14 12:18:37,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 563 transitions, 11396 flow [2024-06-14 12:18:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:18:37,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 12:18:37,471 INFO L175 Difference]: Start difference. First operand has 328 places, 542 transitions, 9828 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:18:37,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 563 transitions, 11396 flow [2024-06-14 12:18:41,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 563 transitions, 11181 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:41,057 INFO L231 Difference]: Finished difference. Result has 328 places, 546 transitions, 9822 flow [2024-06-14 12:18:41,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9822, PETRI_PLACES=328, PETRI_TRANSITIONS=546} [2024-06-14 12:18:41,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-14 12:18:41,071 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 546 transitions, 9822 flow [2024-06-14 12:18:41,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:41,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:41,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:18:41,072 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)] === [2024-06-14 12:18:41,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1128157911, now seen corresponding path program 4 times [2024-06-14 12:18:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:41,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901412398] [2024-06-14 12:18:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:41,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:41,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901412398] [2024-06-14 12:18:41,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901412398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:41,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:41,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:18:41,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323134244] [2024-06-14 12:18:41,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:41,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:18:41,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:18:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:18:41,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:41,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 546 transitions, 9822 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:41,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:41,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:41,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:44,199 INFO L124 PetriNetUnfolderBase]: 5747/8835 cut-off events. [2024-06-14 12:18:44,199 INFO L125 PetriNetUnfolderBase]: For 1208233/1208241 co-relation queries the response was YES. [2024-06-14 12:18:44,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87100 conditions, 8835 events. 5747/8835 cut-off events. For 1208233/1208241 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53193 event pairs, 1472 based on Foata normal form. 10/8844 useless extension candidates. Maximal degree in co-relation 86942. Up to 8618 conditions per place. [2024-06-14 12:18:44,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 67 changer transitions 0/562 dead transitions. [2024-06-14 12:18:44,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 562 transitions, 11212 flow [2024-06-14 12:18:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:18:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:18:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:18:44,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 12:18:44,337 INFO L175 Difference]: Start difference. First operand has 328 places, 546 transitions, 9822 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:18:44,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 562 transitions, 11212 flow [2024-06-14 12:18:47,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 562 transitions, 11097 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:47,953 INFO L231 Difference]: Finished difference. Result has 331 places, 549 transitions, 9920 flow [2024-06-14 12:18:47,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9709, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9920, PETRI_PLACES=331, PETRI_TRANSITIONS=549} [2024-06-14 12:18:47,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-14 12:18:47,954 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 549 transitions, 9920 flow [2024-06-14 12:18:47,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:47,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:47,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:47,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:18:47,954 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:47,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1487625356, now seen corresponding path program 5 times [2024-06-14 12:18:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:47,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972042531] [2024-06-14 12:18:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:47,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:49,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:49,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972042531] [2024-06-14 12:18:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972042531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:49,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:49,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:18:49,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783141090] [2024-06-14 12:18:49,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:49,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:18:49,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:18:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:18:49,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:49,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 549 transitions, 9920 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:49,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:49,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:51,440 INFO L124 PetriNetUnfolderBase]: 5714/8784 cut-off events. [2024-06-14 12:18:51,440 INFO L125 PetriNetUnfolderBase]: For 1240982/1240994 co-relation queries the response was YES. [2024-06-14 12:18:51,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85746 conditions, 8784 events. 5714/8784 cut-off events. For 1240982/1240994 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 52942 event pairs, 1177 based on Foata normal form. 30/8813 useless extension candidates. Maximal degree in co-relation 85587. Up to 7280 conditions per place. [2024-06-14 12:18:51,589 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 372 selfloop transitions, 217 changer transitions 0/592 dead transitions. [2024-06-14 12:18:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 592 transitions, 11438 flow [2024-06-14 12:18:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:18:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:18:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:18:51,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-14 12:18:51,592 INFO L175 Difference]: Start difference. First operand has 331 places, 549 transitions, 9920 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:18:51,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 592 transitions, 11438 flow [2024-06-14 12:18:55,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 592 transitions, 11273 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:55,398 INFO L231 Difference]: Finished difference. Result has 337 places, 549 transitions, 10196 flow [2024-06-14 12:18:55,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9755, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10196, PETRI_PLACES=337, PETRI_TRANSITIONS=549} [2024-06-14 12:18:55,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-14 12:18:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 549 transitions, 10196 flow [2024-06-14 12:18:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:55,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:55,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:55,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:18:55,399 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:55,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1090187526, now seen corresponding path program 6 times [2024-06-14 12:18:55,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135398281] [2024-06-14 12:18:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:55,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:56,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:56,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135398281] [2024-06-14 12:18:56,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135398281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:56,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:18:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022898470] [2024-06-14 12:18:56,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:56,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:18:56,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:56,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:18:56,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:18:56,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:56,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 549 transitions, 10196 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:56,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:56,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:56,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:59,076 INFO L124 PetriNetUnfolderBase]: 5782/8900 cut-off events. [2024-06-14 12:18:59,076 INFO L125 PetriNetUnfolderBase]: For 1266951/1266963 co-relation queries the response was YES. [2024-06-14 12:18:59,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87595 conditions, 8900 events. 5782/8900 cut-off events. For 1266951/1266963 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53640 event pairs, 1265 based on Foata normal form. 30/8929 useless extension candidates. Maximal degree in co-relation 87435. Up to 7369 conditions per place. [2024-06-14 12:18:59,213 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 401 selfloop transitions, 191 changer transitions 0/595 dead transitions. [2024-06-14 12:18:59,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 11994 flow [2024-06-14 12:18:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:18:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:18:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 12:18:59,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 12:18:59,214 INFO L175 Difference]: Start difference. First operand has 337 places, 549 transitions, 10196 flow. Second operand 10 states and 184 transitions. [2024-06-14 12:18:59,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 11994 flow [2024-06-14 12:19:03,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 595 transitions, 11522 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 12:19:03,421 INFO L231 Difference]: Finished difference. Result has 338 places, 551 transitions, 10225 flow [2024-06-14 12:19:03,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9724, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10225, PETRI_PLACES=338, PETRI_TRANSITIONS=551} [2024-06-14 12:19:03,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-14 12:19:03,422 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 551 transitions, 10225 flow [2024-06-14 12:19:03,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:03,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:03,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:03,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:19:03,423 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:03,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 919485096, now seen corresponding path program 7 times [2024-06-14 12:19:03,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:03,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616450397] [2024-06-14 12:19:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:04,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616450397] [2024-06-14 12:19:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616450397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:04,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:04,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:19:04,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045918416] [2024-06-14 12:19:04,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:04,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:19:04,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:19:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:19:04,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:04,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 551 transitions, 10225 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:04,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:04,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:04,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:06,955 INFO L124 PetriNetUnfolderBase]: 5756/8862 cut-off events. [2024-06-14 12:19:06,955 INFO L125 PetriNetUnfolderBase]: For 1244477/1244489 co-relation queries the response was YES. [2024-06-14 12:19:07,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86081 conditions, 8862 events. 5756/8862 cut-off events. For 1244477/1244489 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 53473 event pairs, 1291 based on Foata normal form. 30/8891 useless extension candidates. Maximal degree in co-relation 85920. Up to 7787 conditions per place. [2024-06-14 12:19:07,100 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 165 changer transitions 0/588 dead transitions. [2024-06-14 12:19:07,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 588 transitions, 11896 flow [2024-06-14 12:19:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:19:07,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:19:07,102 INFO L175 Difference]: Start difference. First operand has 338 places, 551 transitions, 10225 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:19:07,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 588 transitions, 11896 flow [2024-06-14 12:19:11,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 588 transitions, 11363 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:11,806 INFO L231 Difference]: Finished difference. Result has 340 places, 553 transitions, 10085 flow [2024-06-14 12:19:11,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9696, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10085, PETRI_PLACES=340, PETRI_TRANSITIONS=553} [2024-06-14 12:19:11,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 12:19:11,807 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 553 transitions, 10085 flow [2024-06-14 12:19:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:11,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:11,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:19:11,808 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:11,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 919369776, now seen corresponding path program 8 times [2024-06-14 12:19:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172400114] [2024-06-14 12:19:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:13,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:13,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172400114] [2024-06-14 12:19:13,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172400114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:13,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:13,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:19:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755219765] [2024-06-14 12:19:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:13,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:19:13,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:19:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:19:13,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:13,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 553 transitions, 10085 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:13,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:13,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:15,326 INFO L124 PetriNetUnfolderBase]: 5824/8978 cut-off events. [2024-06-14 12:19:15,326 INFO L125 PetriNetUnfolderBase]: For 1266554/1266566 co-relation queries the response was YES. [2024-06-14 12:19:15,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86625 conditions, 8978 events. 5824/8978 cut-off events. For 1266554/1266566 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54369 event pairs, 1317 based on Foata normal form. 30/9007 useless extension candidates. Maximal degree in co-relation 86462. Up to 7889 conditions per place. [2024-06-14 12:19:15,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 161 changer transitions 0/594 dead transitions. [2024-06-14 12:19:15,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 594 transitions, 12089 flow [2024-06-14 12:19:15,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:19:15,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:19:15,473 INFO L175 Difference]: Start difference. First operand has 340 places, 553 transitions, 10085 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:19:15,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 594 transitions, 12089 flow [2024-06-14 12:19:19,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 594 transitions, 11691 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:19,422 INFO L231 Difference]: Finished difference. Result has 343 places, 557 transitions, 10219 flow [2024-06-14 12:19:19,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10219, PETRI_PLACES=343, PETRI_TRANSITIONS=557} [2024-06-14 12:19:19,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-14 12:19:19,423 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 557 transitions, 10219 flow [2024-06-14 12:19:19,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:19:19,424 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)] === [2024-06-14 12:19:19,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 565349913, now seen corresponding path program 5 times [2024-06-14 12:19:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666862543] [2024-06-14 12:19:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:20,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:20,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666862543] [2024-06-14 12:19:20,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666862543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:20,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:20,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:20,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310454259] [2024-06-14 12:19:20,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:20,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:20,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:20,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:20,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 557 transitions, 10219 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:20,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:20,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:20,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:22,201 INFO L124 PetriNetUnfolderBase]: 5773/8892 cut-off events. [2024-06-14 12:19:22,201 INFO L125 PetriNetUnfolderBase]: For 1209290/1209298 co-relation queries the response was YES. [2024-06-14 12:19:22,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85952 conditions, 8892 events. 5773/8892 cut-off events. For 1209290/1209298 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53776 event pairs, 1459 based on Foata normal form. 9/8900 useless extension candidates. Maximal degree in co-relation 85787. Up to 8797 conditions per place. [2024-06-14 12:19:22,343 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 38 changer transitions 0/567 dead transitions. [2024-06-14 12:19:22,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 567 transitions, 11543 flow [2024-06-14 12:19:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 12:19:22,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 12:19:22,344 INFO L175 Difference]: Start difference. First operand has 343 places, 557 transitions, 10219 flow. Second operand 7 states and 105 transitions. [2024-06-14 12:19:22,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 567 transitions, 11543 flow [2024-06-14 12:19:26,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 567 transitions, 11104 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:26,745 INFO L231 Difference]: Finished difference. Result has 344 places, 557 transitions, 9862 flow [2024-06-14 12:19:26,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9862, PETRI_PLACES=344, PETRI_TRANSITIONS=557} [2024-06-14 12:19:26,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 12:19:26,746 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 557 transitions, 9862 flow [2024-06-14 12:19:26,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:26,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:26,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:19:26,746 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)] === [2024-06-14 12:19:26,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash -376404329, now seen corresponding path program 6 times [2024-06-14 12:19:26,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:26,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399023722] [2024-06-14 12:19:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:27,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:27,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399023722] [2024-06-14 12:19:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399023722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:27,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:27,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:19:27,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802517658] [2024-06-14 12:19:27,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:27,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:19:27,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:19:27,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:19:27,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:27,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 557 transitions, 9862 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:27,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:27,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:27,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:30,086 INFO L124 PetriNetUnfolderBase]: 5729/8819 cut-off events. [2024-06-14 12:19:30,087 INFO L125 PetriNetUnfolderBase]: For 1212672/1212680 co-relation queries the response was YES. [2024-06-14 12:19:30,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84174 conditions, 8819 events. 5729/8819 cut-off events. For 1212672/1212680 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53219 event pairs, 1455 based on Foata normal form. 9/8827 useless extension candidates. Maximal degree in co-relation 84008. Up to 8738 conditions per place. [2024-06-14 12:19:30,264 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 533 selfloop transitions, 30 changer transitions 0/566 dead transitions. [2024-06-14 12:19:30,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 566 transitions, 11016 flow [2024-06-14 12:19:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:19:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:19:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-14 12:19:30,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-14 12:19:30,265 INFO L175 Difference]: Start difference. First operand has 344 places, 557 transitions, 9862 flow. Second operand 7 states and 103 transitions. [2024-06-14 12:19:30,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 566 transitions, 11016 flow [2024-06-14 12:19:34,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 566 transitions, 10807 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:34,320 INFO L231 Difference]: Finished difference. Result has 343 places, 557 transitions, 9719 flow [2024-06-14 12:19:34,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9653, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9719, PETRI_PLACES=343, PETRI_TRANSITIONS=557} [2024-06-14 12:19:34,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-14 12:19:34,321 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 557 transitions, 9719 flow [2024-06-14 12:19:34,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:34,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:34,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:19:34,321 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)] === [2024-06-14 12:19:34,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash -363496363, now seen corresponding path program 2 times [2024-06-14 12:19:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477806025] [2024-06-14 12:19:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:35,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:35,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477806025] [2024-06-14 12:19:35,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477806025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:35,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:35,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412177431] [2024-06-14 12:19:35,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:35,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:35,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:35,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 557 transitions, 9719 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:35,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:35,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:35,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:37,645 INFO L124 PetriNetUnfolderBase]: 5739/8838 cut-off events. [2024-06-14 12:19:37,646 INFO L125 PetriNetUnfolderBase]: For 1242825/1242825 co-relation queries the response was YES. [2024-06-14 12:19:37,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84470 conditions, 8838 events. 5739/8838 cut-off events. For 1242825/1242825 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53428 event pairs, 1549 based on Foata normal form. 2/8839 useless extension candidates. Maximal degree in co-relation 84303. Up to 8772 conditions per place. [2024-06-14 12:19:37,787 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 548 selfloop transitions, 20 changer transitions 0/571 dead transitions. [2024-06-14 12:19:37,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 571 transitions, 10939 flow [2024-06-14 12:19:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-14 12:19:37,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-14 12:19:37,789 INFO L175 Difference]: Start difference. First operand has 343 places, 557 transitions, 9719 flow. Second operand 8 states and 114 transitions. [2024-06-14 12:19:37,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 571 transitions, 10939 flow [2024-06-14 12:19:41,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 571 transitions, 10825 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:41,930 INFO L231 Difference]: Finished difference. Result has 343 places, 560 transitions, 9708 flow [2024-06-14 12:19:41,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9708, PETRI_PLACES=343, PETRI_TRANSITIONS=560} [2024-06-14 12:19:41,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-14 12:19:41,931 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 560 transitions, 9708 flow [2024-06-14 12:19:41,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:41,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:41,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:41,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:19:41,932 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)] === [2024-06-14 12:19:41,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -363509786, now seen corresponding path program 4 times [2024-06-14 12:19:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:41,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108693424] [2024-06-14 12:19:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:42,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:42,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108693424] [2024-06-14 12:19:42,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108693424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:42,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:42,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696555991] [2024-06-14 12:19:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:42,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:42,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 560 transitions, 9708 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:42,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:42,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:42,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:45,090 INFO L124 PetriNetUnfolderBase]: 5749/8847 cut-off events. [2024-06-14 12:19:45,090 INFO L125 PetriNetUnfolderBase]: For 1270645/1270657 co-relation queries the response was YES. [2024-06-14 12:19:45,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84787 conditions, 8847 events. 5749/8847 cut-off events. For 1270645/1270657 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53370 event pairs, 1399 based on Foata normal form. 14/8860 useless extension candidates. Maximal degree in co-relation 84619. Up to 8520 conditions per place. [2024-06-14 12:19:45,228 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 114 changer transitions 0/576 dead transitions. [2024-06-14 12:19:45,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 576 transitions, 11105 flow [2024-06-14 12:19:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:19:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:19:45,230 INFO L175 Difference]: Start difference. First operand has 343 places, 560 transitions, 9708 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:19:45,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 576 transitions, 11105 flow [2024-06-14 12:19:49,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 576 transitions, 10982 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-14 12:19:49,877 INFO L231 Difference]: Finished difference. Result has 342 places, 563 transitions, 9858 flow [2024-06-14 12:19:49,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9858, PETRI_PLACES=342, PETRI_TRANSITIONS=563} [2024-06-14 12:19:49,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-14 12:19:49,877 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 563 transitions, 9858 flow [2024-06-14 12:19:49,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:49,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:49,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:49,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:19:49,878 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)] === [2024-06-14 12:19:49,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -363509383, now seen corresponding path program 3 times [2024-06-14 12:19:49,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:49,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46963352] [2024-06-14 12:19:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:50,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:50,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46963352] [2024-06-14 12:19:50,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46963352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:50,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:50,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:50,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025340271] [2024-06-14 12:19:50,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:50,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:50,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:50,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:50,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:50,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 563 transitions, 9858 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:50,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:50,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:50,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:53,071 INFO L124 PetriNetUnfolderBase]: 5759/8861 cut-off events. [2024-06-14 12:19:53,071 INFO L125 PetriNetUnfolderBase]: For 1297825/1297833 co-relation queries the response was YES. [2024-06-14 12:19:53,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85394 conditions, 8861 events. 5759/8861 cut-off events. For 1297825/1297833 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53521 event pairs, 1456 based on Foata normal form. 10/8870 useless extension candidates. Maximal degree in co-relation 85227. Up to 8732 conditions per place. [2024-06-14 12:19:53,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 52 changer transitions 0/580 dead transitions. [2024-06-14 12:19:53,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 580 transitions, 11286 flow [2024-06-14 12:19:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:19:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:19:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:19:53,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:19:53,206 INFO L175 Difference]: Start difference. First operand has 342 places, 563 transitions, 9858 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:19:53,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 580 transitions, 11286 flow [2024-06-14 12:19:57,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 580 transitions, 11074 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:57,586 INFO L231 Difference]: Finished difference. Result has 345 places, 566 transitions, 9812 flow [2024-06-14 12:19:57,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9646, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9812, PETRI_PLACES=345, PETRI_TRANSITIONS=566} [2024-06-14 12:19:57,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 12:19:57,587 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 566 transitions, 9812 flow [2024-06-14 12:19:57,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:57,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:57,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:57,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:19:57,588 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)] === [2024-06-14 12:19:57,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:57,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1976417108, now seen corresponding path program 5 times [2024-06-14 12:19:57,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:57,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757542558] [2024-06-14 12:19:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:57,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757542558] [2024-06-14 12:19:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757542558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:58,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991074573] [2024-06-14 12:19:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:58,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:58,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 566 transitions, 9812 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:00,889 INFO L124 PetriNetUnfolderBase]: 5769/8875 cut-off events. [2024-06-14 12:20:00,890 INFO L125 PetriNetUnfolderBase]: For 1325155/1325167 co-relation queries the response was YES. [2024-06-14 12:20:00,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85606 conditions, 8875 events. 5769/8875 cut-off events. For 1325155/1325167 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53542 event pairs, 1400 based on Foata normal form. 14/8888 useless extension candidates. Maximal degree in co-relation 85438. Up to 8544 conditions per place. [2024-06-14 12:20:01,016 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 97 changer transitions 0/584 dead transitions. [2024-06-14 12:20:01,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 584 transitions, 11235 flow [2024-06-14 12:20:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:20:01,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:20:01,018 INFO L175 Difference]: Start difference. First operand has 345 places, 566 transitions, 9812 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:20:01,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 584 transitions, 11235 flow [2024-06-14 12:20:04,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 584 transitions, 11105 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:04,417 INFO L231 Difference]: Finished difference. Result has 348 places, 569 transitions, 9917 flow [2024-06-14 12:20:04,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9917, PETRI_PLACES=348, PETRI_TRANSITIONS=569} [2024-06-14 12:20:04,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 12:20:04,418 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 569 transitions, 9917 flow [2024-06-14 12:20:04,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:04,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:04,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:04,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:20:04,418 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)] === [2024-06-14 12:20:04,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:04,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1976405948, now seen corresponding path program 6 times [2024-06-14 12:20:04,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:04,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533299052] [2024-06-14 12:20:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:05,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:05,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533299052] [2024-06-14 12:20:05,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533299052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:05,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:05,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:05,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936296493] [2024-06-14 12:20:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:05,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:05,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:05,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:05,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:05,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:05,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 569 transitions, 9917 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:05,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:05,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:05,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:07,597 INFO L124 PetriNetUnfolderBase]: 5763/8867 cut-off events. [2024-06-14 12:20:07,597 INFO L125 PetriNetUnfolderBase]: For 1345280/1345292 co-relation queries the response was YES. [2024-06-14 12:20:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85763 conditions, 8867 events. 5763/8867 cut-off events. For 1345280/1345292 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53456 event pairs, 1399 based on Foata normal form. 14/8880 useless extension candidates. Maximal degree in co-relation 85594. Up to 8539 conditions per place. [2024-06-14 12:20:07,731 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 96 changer transitions 0/584 dead transitions. [2024-06-14 12:20:07,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 584 transitions, 11132 flow [2024-06-14 12:20:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:20:07,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:20:07,733 INFO L175 Difference]: Start difference. First operand has 348 places, 569 transitions, 9917 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:20:07,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 584 transitions, 11132 flow [2024-06-14 12:20:12,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 584 transitions, 10820 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:12,028 INFO L231 Difference]: Finished difference. Result has 349 places, 569 transitions, 9803 flow [2024-06-14 12:20:12,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9803, PETRI_PLACES=349, PETRI_TRANSITIONS=569} [2024-06-14 12:20:12,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-14 12:20:12,029 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 569 transitions, 9803 flow [2024-06-14 12:20:12,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:12,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:12,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:12,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:20:12,030 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)] === [2024-06-14 12:20:12,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:12,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1976405545, now seen corresponding path program 4 times [2024-06-14 12:20:12,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:12,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314598126] [2024-06-14 12:20:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:12,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:12,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314598126] [2024-06-14 12:20:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314598126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:12,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:12,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396350936] [2024-06-14 12:20:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:12,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:12,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 569 transitions, 9803 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:12,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:12,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:12,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:15,187 INFO L124 PetriNetUnfolderBase]: 5757/8859 cut-off events. [2024-06-14 12:20:15,187 INFO L125 PetriNetUnfolderBase]: For 1360595/1360603 co-relation queries the response was YES. [2024-06-14 12:20:15,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85761 conditions, 8859 events. 5757/8859 cut-off events. For 1360595/1360603 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53510 event pairs, 1454 based on Foata normal form. 10/8868 useless extension candidates. Maximal degree in co-relation 85591. Up to 8733 conditions per place. [2024-06-14 12:20:15,309 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 49 changer transitions 0/582 dead transitions. [2024-06-14 12:20:15,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 582 transitions, 11003 flow [2024-06-14 12:20:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:20:15,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:20:15,311 INFO L175 Difference]: Start difference. First operand has 349 places, 569 transitions, 9803 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:20:15,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 582 transitions, 11003 flow [2024-06-14 12:20:19,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 582 transitions, 10724 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:19,190 INFO L231 Difference]: Finished difference. Result has 349 places, 569 transitions, 9628 flow [2024-06-14 12:20:19,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9524, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9628, PETRI_PLACES=349, PETRI_TRANSITIONS=569} [2024-06-14 12:20:19,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-14 12:20:19,190 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 569 transitions, 9628 flow [2024-06-14 12:20:19,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:19,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:19,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:19,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:20:19,191 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:19,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash -24183796, now seen corresponding path program 9 times [2024-06-14 12:20:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:19,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108983139] [2024-06-14 12:20:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:19,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:20,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:20,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108983139] [2024-06-14 12:20:20,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108983139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:20,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:20,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:20:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190976442] [2024-06-14 12:20:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:20:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:20:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:20:20,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:20,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 569 transitions, 9628 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:20,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:20,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:20,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:22,946 INFO L124 PetriNetUnfolderBase]: 5879/9060 cut-off events. [2024-06-14 12:20:22,946 INFO L125 PetriNetUnfolderBase]: For 1452772/1452780 co-relation queries the response was YES. [2024-06-14 12:20:23,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87407 conditions, 9060 events. 5879/9060 cut-off events. For 1452772/1452780 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54984 event pairs, 1293 based on Foata normal form. 26/9085 useless extension candidates. Maximal degree in co-relation 87236. Up to 8242 conditions per place. [2024-06-14 12:20:23,079 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 486 selfloop transitions, 140 changer transitions 0/629 dead transitions. [2024-06-14 12:20:23,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 629 transitions, 11639 flow [2024-06-14 12:20:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:20:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:20:23,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-14 12:20:23,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-14 12:20:23,080 INFO L175 Difference]: Start difference. First operand has 349 places, 569 transitions, 9628 flow. Second operand 11 states and 190 transitions. [2024-06-14 12:20:23,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 629 transitions, 11639 flow [2024-06-14 12:20:28,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 629 transitions, 11485 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:28,329 INFO L231 Difference]: Finished difference. Result has 352 places, 573 transitions, 9933 flow [2024-06-14 12:20:28,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9477, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9933, PETRI_PLACES=352, PETRI_TRANSITIONS=573} [2024-06-14 12:20:28,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 12:20:28,330 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 573 transitions, 9933 flow [2024-06-14 12:20:28,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:28,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:28,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:28,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:20:28,331 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:28,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1397486968, now seen corresponding path program 10 times [2024-06-14 12:20:28,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:28,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372806825] [2024-06-14 12:20:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:29,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:29,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372806825] [2024-06-14 12:20:29,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372806825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:29,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:29,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:20:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640977668] [2024-06-14 12:20:29,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:29,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:20:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:20:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:20:29,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:29,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 573 transitions, 9933 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:29,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:29,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:29,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:31,869 INFO L124 PetriNetUnfolderBase]: 6001/9268 cut-off events. [2024-06-14 12:20:31,869 INFO L125 PetriNetUnfolderBase]: For 1502072/1502080 co-relation queries the response was YES. [2024-06-14 12:20:31,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89955 conditions, 9268 events. 6001/9268 cut-off events. For 1502072/1502080 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 56652 event pairs, 1274 based on Foata normal form. 26/9293 useless extension candidates. Maximal degree in co-relation 89783. Up to 7971 conditions per place. [2024-06-14 12:20:32,017 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 452 selfloop transitions, 170 changer transitions 0/625 dead transitions. [2024-06-14 12:20:32,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 625 transitions, 11901 flow [2024-06-14 12:20:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:20:32,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 12:20:32,018 INFO L175 Difference]: Start difference. First operand has 352 places, 573 transitions, 9933 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:20:32,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 625 transitions, 11901 flow [2024-06-14 12:20:37,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 625 transitions, 11513 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-14 12:20:37,350 INFO L231 Difference]: Finished difference. Result has 353 places, 577 transitions, 10076 flow [2024-06-14 12:20:37,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10076, PETRI_PLACES=353, PETRI_TRANSITIONS=577} [2024-06-14 12:20:37,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-14 12:20:37,351 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 577 transitions, 10076 flow [2024-06-14 12:20:37,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:37,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:37,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:37,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:20:37,351 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:37,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash -274499366, now seen corresponding path program 11 times [2024-06-14 12:20:37,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:37,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276564839] [2024-06-14 12:20:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:37,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:38,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:38,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276564839] [2024-06-14 12:20:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276564839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:38,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884241938] [2024-06-14 12:20:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:38,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:38,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:38,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:38,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 577 transitions, 10076 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:38,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:38,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:38,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:40,840 INFO L124 PetriNetUnfolderBase]: 6170/9549 cut-off events. [2024-06-14 12:20:40,840 INFO L125 PetriNetUnfolderBase]: For 1503854/1503862 co-relation queries the response was YES. [2024-06-14 12:20:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91389 conditions, 9549 events. 6170/9549 cut-off events. For 1503854/1503862 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 58641 event pairs, 989 based on Foata normal form. 26/9574 useless extension candidates. Maximal degree in co-relation 91216. Up to 8443 conditions per place. [2024-06-14 12:20:40,993 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 468 selfloop transitions, 156 changer transitions 0/627 dead transitions. [2024-06-14 12:20:40,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 627 transitions, 12168 flow [2024-06-14 12:20:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:20:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:20:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 12:20:40,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:20:40,994 INFO L175 Difference]: Start difference. First operand has 353 places, 577 transitions, 10076 flow. Second operand 10 states and 170 transitions. [2024-06-14 12:20:40,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 627 transitions, 12168 flow [2024-06-14 12:20:46,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 627 transitions, 11616 flow, removed 127 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:46,324 INFO L231 Difference]: Finished difference. Result has 355 places, 583 transitions, 10002 flow [2024-06-14 12:20:46,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9530, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10002, PETRI_PLACES=355, PETRI_TRANSITIONS=583} [2024-06-14 12:20:46,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 12:20:46,325 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 583 transitions, 10002 flow [2024-06-14 12:20:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:46,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:46,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:20:46,325 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)] === [2024-06-14 12:20:46,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2084158361, now seen corresponding path program 1 times [2024-06-14 12:20:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:46,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784978269] [2024-06-14 12:20:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784978269] [2024-06-14 12:20:47,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784978269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:47,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:47,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:20:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902709719] [2024-06-14 12:20:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:47,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:20:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:20:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:20:47,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:20:47,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 583 transitions, 10002 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:47,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:47,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:20:47,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:49,427 INFO L124 PetriNetUnfolderBase]: 5996/9383 cut-off events. [2024-06-14 12:20:49,428 INFO L125 PetriNetUnfolderBase]: For 1272795/1272799 co-relation queries the response was YES. [2024-06-14 12:20:49,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85805 conditions, 9383 events. 5996/9383 cut-off events. For 1272795/1272799 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 58793 event pairs, 1766 based on Foata normal form. 1/9373 useless extension candidates. Maximal degree in co-relation 85631. Up to 9186 conditions per place. [2024-06-14 12:20:49,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 558 selfloop transitions, 27 changer transitions 0/599 dead transitions. [2024-06-14 12:20:49,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 599 transitions, 11230 flow [2024-06-14 12:20:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:20:49,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:20:49,598 INFO L175 Difference]: Start difference. First operand has 355 places, 583 transitions, 10002 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:20:49,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 599 transitions, 11230 flow [2024-06-14 12:20:53,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 599 transitions, 10814 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:53,837 INFO L231 Difference]: Finished difference. Result has 355 places, 583 transitions, 9647 flow [2024-06-14 12:20:53,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9586, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9647, PETRI_PLACES=355, PETRI_TRANSITIONS=583} [2024-06-14 12:20:53,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 12:20:53,837 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 583 transitions, 9647 flow [2024-06-14 12:20:53,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:53,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:53,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:53,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:20:53,838 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)] === [2024-06-14 12:20:53,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1128171582, now seen corresponding path program 1 times [2024-06-14 12:20:53,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:53,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13657672] [2024-06-14 12:20:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:53,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:54,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:54,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13657672] [2024-06-14 12:20:54,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13657672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:54,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:54,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:54,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881731794] [2024-06-14 12:20:54,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:54,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:54,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:20:54,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 583 transitions, 9647 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:54,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:54,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:20:54,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:56,914 INFO L124 PetriNetUnfolderBase]: 5988/9372 cut-off events. [2024-06-14 12:20:56,914 INFO L125 PetriNetUnfolderBase]: For 1275776/1275780 co-relation queries the response was YES. [2024-06-14 12:20:57,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84461 conditions, 9372 events. 5988/9372 cut-off events. For 1275776/1275780 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 58668 event pairs, 1764 based on Foata normal form. 2/9365 useless extension candidates. Maximal degree in co-relation 84286. Up to 9133 conditions per place. [2024-06-14 12:20:57,074 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 36 changer transitions 0/603 dead transitions. [2024-06-14 12:20:57,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 603 transitions, 11127 flow [2024-06-14 12:20:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:20:57,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:20:57,075 INFO L175 Difference]: Start difference. First operand has 355 places, 583 transitions, 9647 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:20:57,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 603 transitions, 11127 flow [2024-06-14 12:21:01,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 603 transitions, 10875 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:01,992 INFO L231 Difference]: Finished difference. Result has 355 places, 586 transitions, 9531 flow [2024-06-14 12:21:01,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9531, PETRI_PLACES=355, PETRI_TRANSITIONS=586} [2024-06-14 12:21:01,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 12:21:01,993 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 586 transitions, 9531 flow [2024-06-14 12:21:01,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:01,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:01,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:01,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:21:01,993 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)] === [2024-06-14 12:21:01,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:01,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1128166002, now seen corresponding path program 2 times [2024-06-14 12:21:01,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:01,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470101142] [2024-06-14 12:21:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:01,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:02,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470101142] [2024-06-14 12:21:02,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470101142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:02,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:02,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:21:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971466215] [2024-06-14 12:21:02,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:02,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:21:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:21:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:21:02,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:02,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 586 transitions, 9531 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:02,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:02,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:02,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:04,890 INFO L124 PetriNetUnfolderBase]: 5993/9381 cut-off events. [2024-06-14 12:21:04,891 INFO L125 PetriNetUnfolderBase]: For 1275075/1275079 co-relation queries the response was YES. [2024-06-14 12:21:04,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84153 conditions, 9381 events. 5993/9381 cut-off events. For 1275075/1275079 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 58721 event pairs, 1763 based on Foata normal form. 2/9374 useless extension candidates. Maximal degree in co-relation 83978. Up to 9141 conditions per place. [2024-06-14 12:21:05,036 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 42 changer transitions 0/608 dead transitions. [2024-06-14 12:21:05,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 608 transitions, 11039 flow [2024-06-14 12:21:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:21:05,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:21:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:21:05,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 12:21:05,037 INFO L175 Difference]: Start difference. First operand has 355 places, 586 transitions, 9531 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:21:05,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 608 transitions, 11039 flow [2024-06-14 12:21:10,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 608 transitions, 10917 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:10,340 INFO L231 Difference]: Finished difference. Result has 356 places, 589 transitions, 9561 flow [2024-06-14 12:21:10,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9561, PETRI_PLACES=356, PETRI_TRANSITIONS=589} [2024-06-14 12:21:10,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 12:21:10,340 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 589 transitions, 9561 flow [2024-06-14 12:21:10,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:10,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:10,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:10,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:21:10,341 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)] === [2024-06-14 12:21:10,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1372241940, now seen corresponding path program 3 times [2024-06-14 12:21:10,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:10,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400380497] [2024-06-14 12:21:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:10,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:11,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:11,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400380497] [2024-06-14 12:21:11,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400380497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:11,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:11,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:11,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897362381] [2024-06-14 12:21:11,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:11,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:11,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:11,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:11,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 589 transitions, 9561 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:11,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:11,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:11,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:13,655 INFO L124 PetriNetUnfolderBase]: 6003/9395 cut-off events. [2024-06-14 12:21:13,655 INFO L125 PetriNetUnfolderBase]: For 1303188/1303192 co-relation queries the response was YES. [2024-06-14 12:21:13,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84495 conditions, 9395 events. 6003/9395 cut-off events. For 1303188/1303192 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 58878 event pairs, 1764 based on Foata normal form. 2/9386 useless extension candidates. Maximal degree in co-relation 84319. Up to 9217 conditions per place. [2024-06-14 12:21:13,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 566 selfloop transitions, 25 changer transitions 0/605 dead transitions. [2024-06-14 12:21:13,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 605 transitions, 10847 flow [2024-06-14 12:21:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:21:13,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:21:13,895 INFO L175 Difference]: Start difference. First operand has 356 places, 589 transitions, 9561 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:21:13,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 605 transitions, 10847 flow [2024-06-14 12:21:19,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 605 transitions, 10736 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:19,319 INFO L231 Difference]: Finished difference. Result has 360 places, 592 transitions, 9574 flow [2024-06-14 12:21:19,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9453, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9574, PETRI_PLACES=360, PETRI_TRANSITIONS=592} [2024-06-14 12:21:19,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-14 12:21:19,320 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 592 transitions, 9574 flow [2024-06-14 12:21:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:19,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:19,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:19,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:21:19,321 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)] === [2024-06-14 12:21:19,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -363325088, now seen corresponding path program 4 times [2024-06-14 12:21:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:19,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743823766] [2024-06-14 12:21:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743823766] [2024-06-14 12:21:20,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743823766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:20,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135517703] [2024-06-14 12:21:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:20,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:20,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:21:20,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 592 transitions, 9574 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:20,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:20,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:21:20,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:22,579 INFO L124 PetriNetUnfolderBase]: 5997/9387 cut-off events. [2024-06-14 12:21:22,580 INFO L125 PetriNetUnfolderBase]: For 1316675/1316679 co-relation queries the response was YES. [2024-06-14 12:21:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84385 conditions, 9387 events. 5997/9387 cut-off events. For 1316675/1316679 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 58790 event pairs, 1765 based on Foata normal form. 2/9378 useless extension candidates. Maximal degree in co-relation 84208. Up to 9218 conditions per place. [2024-06-14 12:21:22,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 20 changer transitions 0/604 dead transitions. [2024-06-14 12:21:22,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 604 transitions, 10792 flow [2024-06-14 12:21:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 12:21:22,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 12:21:22,734 INFO L175 Difference]: Start difference. First operand has 360 places, 592 transitions, 9574 flow. Second operand 8 states and 120 transitions. [2024-06-14 12:21:22,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 604 transitions, 10792 flow [2024-06-14 12:21:28,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 604 transitions, 10668 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:28,309 INFO L231 Difference]: Finished difference. Result has 362 places, 592 transitions, 9496 flow [2024-06-14 12:21:28,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9496, PETRI_PLACES=362, PETRI_TRANSITIONS=592} [2024-06-14 12:21:28,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 12:21:28,310 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 592 transitions, 9496 flow [2024-06-14 12:21:28,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:28,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:28,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:21:28,311 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)] === [2024-06-14 12:21:28,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:28,311 INFO L85 PathProgramCache]: Analyzing trace with hash -363048041, now seen corresponding path program 1 times [2024-06-14 12:21:28,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:28,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764003900] [2024-06-14 12:21:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:29,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764003900] [2024-06-14 12:21:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764003900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:29,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:21:29,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362478208] [2024-06-14 12:21:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:29,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:21:29,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:21:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:21:29,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:21:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 592 transitions, 9496 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:21:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:21:29,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:31,993 INFO L124 PetriNetUnfolderBase]: 6198/9599 cut-off events. [2024-06-14 12:21:31,994 INFO L125 PetriNetUnfolderBase]: For 1480958/1480958 co-relation queries the response was YES. [2024-06-14 12:21:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88540 conditions, 9599 events. 6198/9599 cut-off events. For 1480958/1480958 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 59092 event pairs, 1840 based on Foata normal form. 2/9600 useless extension candidates. Maximal degree in co-relation 88362. Up to 9535 conditions per place. [2024-06-14 12:21:32,161 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 583 selfloop transitions, 19 changer transitions 0/605 dead transitions. [2024-06-14 12:21:32,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 605 transitions, 10778 flow [2024-06-14 12:21:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-14 12:21:32,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 12:21:32,163 INFO L175 Difference]: Start difference. First operand has 362 places, 592 transitions, 9496 flow. Second operand 8 states and 112 transitions. [2024-06-14 12:21:32,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 605 transitions, 10778 flow [2024-06-14 12:21:37,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 605 transitions, 10683 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:21:37,957 INFO L231 Difference]: Finished difference. Result has 362 places, 594 transitions, 9494 flow [2024-06-14 12:21:37,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9494, PETRI_PLACES=362, PETRI_TRANSITIONS=594} [2024-06-14 12:21:37,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 12:21:37,958 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 594 transitions, 9494 flow [2024-06-14 12:21:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:21:37,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:37,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:37,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:21:37,959 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)] === [2024-06-14 12:21:37,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2053512793, now seen corresponding path program 1 times [2024-06-14 12:21:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:37,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203850743] [2024-06-14 12:21:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:37,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:38,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:38,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203850743] [2024-06-14 12:21:38,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203850743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:38,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:38,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:38,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297026651] [2024-06-14 12:21:38,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:38,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:38,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:38,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:21:38,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 594 transitions, 9494 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:38,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:38,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:21:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:41,353 INFO L124 PetriNetUnfolderBase]: 6202/9596 cut-off events. [2024-06-14 12:21:41,353 INFO L125 PetriNetUnfolderBase]: For 1507834/1507842 co-relation queries the response was YES. [2024-06-14 12:21:41,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88781 conditions, 9596 events. 6202/9596 cut-off events. For 1507834/1507842 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58960 event pairs, 1592 based on Foata normal form. 12/9607 useless extension candidates. Maximal degree in co-relation 88602. Up to 9240 conditions per place. [2024-06-14 12:21:41,547 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 513 selfloop transitions, 110 changer transitions 0/626 dead transitions. [2024-06-14 12:21:41,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 626 transitions, 11151 flow [2024-06-14 12:21:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:21:41,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:21:41,548 INFO L175 Difference]: Start difference. First operand has 362 places, 594 transitions, 9494 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:21:41,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 626 transitions, 11151 flow [2024-06-14 12:21:48,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 626 transitions, 11074 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:48,913 INFO L231 Difference]: Finished difference. Result has 364 places, 597 transitions, 9738 flow [2024-06-14 12:21:48,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9417, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9738, PETRI_PLACES=364, PETRI_TRANSITIONS=597} [2024-06-14 12:21:48,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-14 12:21:48,914 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 597 transitions, 9738 flow [2024-06-14 12:21:48,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:48,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:48,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:21:48,915 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)] === [2024-06-14 12:21:48,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1724320529, now seen corresponding path program 2 times [2024-06-14 12:21:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544035131] [2024-06-14 12:21:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:49,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544035131] [2024-06-14 12:21:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544035131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:49,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:49,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855040889] [2024-06-14 12:21:49,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:49,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:49,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:21:49,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 597 transitions, 9738 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:49,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:49,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:21:49,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:52,175 INFO L124 PetriNetUnfolderBase]: 6212/9610 cut-off events. [2024-06-14 12:21:52,175 INFO L125 PetriNetUnfolderBase]: For 1528906/1528914 co-relation queries the response was YES. [2024-06-14 12:21:52,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89536 conditions, 9610 events. 6212/9610 cut-off events. For 1528906/1528914 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 59006 event pairs, 1591 based on Foata normal form. 10/9619 useless extension candidates. Maximal degree in co-relation 89356. Up to 9356 conditions per place. [2024-06-14 12:21:52,343 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 103 changer transitions 0/625 dead transitions. [2024-06-14 12:21:52,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 625 transitions, 11192 flow [2024-06-14 12:21:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:21:52,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:21:52,344 INFO L175 Difference]: Start difference. First operand has 364 places, 597 transitions, 9738 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:21:52,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 625 transitions, 11192 flow [2024-06-14 12:21:59,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 625 transitions, 10975 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:21:59,532 INFO L231 Difference]: Finished difference. Result has 367 places, 601 transitions, 9850 flow [2024-06-14 12:21:59,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9525, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9850, PETRI_PLACES=367, PETRI_TRANSITIONS=601} [2024-06-14 12:21:59,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-14 12:21:59,533 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 601 transitions, 9850 flow [2024-06-14 12:21:59,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:59,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:59,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:59,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:21:59,533 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)] === [2024-06-14 12:21:59,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:59,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1833897779, now seen corresponding path program 3 times [2024-06-14 12:21:59,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:59,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325608293] [2024-06-14 12:21:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:00,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:00,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325608293] [2024-06-14 12:22:00,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325608293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:00,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:00,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:00,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037556423] [2024-06-14 12:22:00,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:00,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:00,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:00,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:00,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:22:00,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 601 transitions, 9850 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:00,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:00,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:22:00,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:02,844 INFO L124 PetriNetUnfolderBase]: 6242/9653 cut-off events. [2024-06-14 12:22:02,845 INFO L125 PetriNetUnfolderBase]: For 1579255/1579259 co-relation queries the response was YES. [2024-06-14 12:22:03,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90201 conditions, 9653 events. 6242/9653 cut-off events. For 1579255/1579259 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59266 event pairs, 1585 based on Foata normal form. 10/9662 useless extension candidates. Maximal degree in co-relation 90020. Up to 8888 conditions per place. [2024-06-14 12:22:03,049 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 483 selfloop transitions, 148 changer transitions 0/634 dead transitions. [2024-06-14 12:22:03,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 634 transitions, 11750 flow [2024-06-14 12:22:03,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:03,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:22:03,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:22:03,050 INFO L175 Difference]: Start difference. First operand has 367 places, 601 transitions, 9850 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:22:03,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 634 transitions, 11750 flow [2024-06-14 12:22:10,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 634 transitions, 11595 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:10,637 INFO L231 Difference]: Finished difference. Result has 371 places, 608 transitions, 10150 flow [2024-06-14 12:22:10,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9695, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10150, PETRI_PLACES=371, PETRI_TRANSITIONS=608} [2024-06-14 12:22:10,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-14 12:22:10,638 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 608 transitions, 10150 flow [2024-06-14 12:22:10,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:10,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:10,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:22:10,638 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)] === [2024-06-14 12:22:10,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1697961531, now seen corresponding path program 1 times [2024-06-14 12:22:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:10,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53418359] [2024-06-14 12:22:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:11,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:11,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53418359] [2024-06-14 12:22:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53418359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:11,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904001750] [2024-06-14 12:22:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:11,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:11,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:11,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:11,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:22:11,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 608 transitions, 10150 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:11,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:11,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:22:11,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:13,820 INFO L124 PetriNetUnfolderBase]: 6268/9691 cut-off events. [2024-06-14 12:22:13,820 INFO L125 PetriNetUnfolderBase]: For 1602399/1602403 co-relation queries the response was YES. [2024-06-14 12:22:13,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91443 conditions, 9691 events. 6268/9691 cut-off events. For 1602399/1602403 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 59598 event pairs, 1716 based on Foata normal form. 6/9696 useless extension candidates. Maximal degree in co-relation 91261. Up to 9522 conditions per place. [2024-06-14 12:22:14,000 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 52 changer transitions 0/635 dead transitions. [2024-06-14 12:22:14,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 635 transitions, 11926 flow [2024-06-14 12:22:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:22:14,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:22:14,002 INFO L175 Difference]: Start difference. First operand has 371 places, 608 transitions, 10150 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:22:14,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 635 transitions, 11926 flow [2024-06-14 12:22:20,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 635 transitions, 11629 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:20,451 INFO L231 Difference]: Finished difference. Result has 374 places, 615 transitions, 10168 flow [2024-06-14 12:22:20,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9853, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10168, PETRI_PLACES=374, PETRI_TRANSITIONS=615} [2024-06-14 12:22:20,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-14 12:22:20,452 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 615 transitions, 10168 flow [2024-06-14 12:22:20,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:20,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:20,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:20,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:22:20,452 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)] === [2024-06-14 12:22:20,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1834196309, now seen corresponding path program 4 times [2024-06-14 12:22:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172973013] [2024-06-14 12:22:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:21,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172973013] [2024-06-14 12:22:21,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172973013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:21,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:21,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:21,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885093609] [2024-06-14 12:22:21,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:21,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:22:21,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 615 transitions, 10168 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:21,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:21,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:22:21,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:23,589 INFO L124 PetriNetUnfolderBase]: 6278/9704 cut-off events. [2024-06-14 12:22:23,590 INFO L125 PetriNetUnfolderBase]: For 1640356/1640360 co-relation queries the response was YES. [2024-06-14 12:22:23,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91601 conditions, 9704 events. 6278/9704 cut-off events. For 1640356/1640360 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59609 event pairs, 1579 based on Foata normal form. 10/9713 useless extension candidates. Maximal degree in co-relation 91418. Up to 8933 conditions per place. [2024-06-14 12:22:23,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 156 changer transitions 0/644 dead transitions. [2024-06-14 12:22:23,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 644 transitions, 12103 flow [2024-06-14 12:22:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:22:23,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:22:23,761 INFO L175 Difference]: Start difference. First operand has 374 places, 615 transitions, 10168 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:22:23,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 644 transitions, 12103 flow [2024-06-14 12:22:29,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 644 transitions, 11918 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-14 12:22:29,900 INFO L231 Difference]: Finished difference. Result has 379 places, 621 transitions, 10507 flow [2024-06-14 12:22:29,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9983, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10507, PETRI_PLACES=379, PETRI_TRANSITIONS=621} [2024-06-14 12:22:29,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-14 12:22:29,902 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 621 transitions, 10507 flow [2024-06-14 12:22:29,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:29,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:29,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:29,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:22:29,902 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)] === [2024-06-14 12:22:29,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1838844821, now seen corresponding path program 2 times [2024-06-14 12:22:29,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:29,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532385384] [2024-06-14 12:22:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:29,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532385384] [2024-06-14 12:22:30,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532385384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:30,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:30,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:30,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656504768] [2024-06-14 12:22:30,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:30,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:30,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:30,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:22:30,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 621 transitions, 10507 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:30,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:30,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:22:30,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:32,979 INFO L124 PetriNetUnfolderBase]: 6283/9713 cut-off events. [2024-06-14 12:22:32,979 INFO L125 PetriNetUnfolderBase]: For 1646013/1646017 co-relation queries the response was YES. [2024-06-14 12:22:33,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92460 conditions, 9713 events. 6283/9713 cut-off events. For 1646013/1646017 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 59729 event pairs, 1711 based on Foata normal form. 5/9717 useless extension candidates. Maximal degree in co-relation 92274. Up to 9617 conditions per place. [2024-06-14 12:22:33,156 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 595 selfloop transitions, 41 changer transitions 0/639 dead transitions. [2024-06-14 12:22:33,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 639 transitions, 11907 flow [2024-06-14 12:22:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:22:33,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:22:33,159 INFO L175 Difference]: Start difference. First operand has 379 places, 621 transitions, 10507 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:22:33,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 639 transitions, 11907 flow [2024-06-14 12:22:39,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 639 transitions, 11543 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:39,422 INFO L231 Difference]: Finished difference. Result has 381 places, 624 transitions, 10315 flow [2024-06-14 12:22:39,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10143, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10315, PETRI_PLACES=381, PETRI_TRANSITIONS=624} [2024-06-14 12:22:39,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-14 12:22:39,423 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 624 transitions, 10315 flow [2024-06-14 12:22:39,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:39,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:39,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:39,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:22:39,424 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)] === [2024-06-14 12:22:39,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2011327829, now seen corresponding path program 5 times [2024-06-14 12:22:39,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800860950] [2024-06-14 12:22:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800860950] [2024-06-14 12:22:40,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800860950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685111632] [2024-06-14 12:22:40,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:40,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:40,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:22:40,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 624 transitions, 10315 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:40,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:40,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:22:40,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:42,573 INFO L124 PetriNetUnfolderBase]: 6317/9758 cut-off events. [2024-06-14 12:22:42,574 INFO L125 PetriNetUnfolderBase]: For 1697068/1697072 co-relation queries the response was YES. [2024-06-14 12:22:42,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93142 conditions, 9758 events. 6317/9758 cut-off events. For 1697068/1697072 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 59918 event pairs, 1598 based on Foata normal form. 6/9763 useless extension candidates. Maximal degree in co-relation 92956. Up to 9457 conditions per place. [2024-06-14 12:22:42,756 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 543 selfloop transitions, 106 changer transitions 0/652 dead transitions. [2024-06-14 12:22:42,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 652 transitions, 12153 flow [2024-06-14 12:22:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:22:42,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:22:42,758 INFO L175 Difference]: Start difference. First operand has 381 places, 624 transitions, 10315 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:22:42,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 652 transitions, 12153 flow [2024-06-14 12:22:50,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 652 transitions, 12007 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:50,056 INFO L231 Difference]: Finished difference. Result has 384 places, 633 transitions, 10702 flow [2024-06-14 12:22:50,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10169, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10702, PETRI_PLACES=384, PETRI_TRANSITIONS=633} [2024-06-14 12:22:50,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-14 12:22:50,057 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 633 transitions, 10702 flow [2024-06-14 12:22:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:50,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:50,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:22:50,057 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)] === [2024-06-14 12:22:50,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2011328201, now seen corresponding path program 3 times [2024-06-14 12:22:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585229762] [2024-06-14 12:22:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:50,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:50,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585229762] [2024-06-14 12:22:50,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585229762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:50,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:50,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:22:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732257828] [2024-06-14 12:22:50,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:50,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:22:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:22:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:22:50,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:22:50,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 633 transitions, 10702 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:50,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:50,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:22:50,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:53,272 INFO L124 PetriNetUnfolderBase]: 6322/9767 cut-off events. [2024-06-14 12:22:53,272 INFO L125 PetriNetUnfolderBase]: For 1724508/1724512 co-relation queries the response was YES. [2024-06-14 12:22:53,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93757 conditions, 9767 events. 6322/9767 cut-off events. For 1724508/1724512 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 60059 event pairs, 1712 based on Foata normal form. 5/9771 useless extension candidates. Maximal degree in co-relation 93569. Up to 9661 conditions per place. [2024-06-14 12:22:53,446 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 604 selfloop transitions, 44 changer transitions 0/651 dead transitions. [2024-06-14 12:22:53,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 651 transitions, 12132 flow [2024-06-14 12:22:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:22:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:22:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:22:53,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:22:53,448 INFO L175 Difference]: Start difference. First operand has 384 places, 633 transitions, 10702 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:22:53,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 651 transitions, 12132 flow [2024-06-14 12:22:59,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 651 transitions, 11919 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:22:59,293 INFO L231 Difference]: Finished difference. Result has 387 places, 636 transitions, 10673 flow [2024-06-14 12:22:59,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10489, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10673, PETRI_PLACES=387, PETRI_TRANSITIONS=636} [2024-06-14 12:22:59,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-14 12:22:59,293 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 636 transitions, 10673 flow [2024-06-14 12:22:59,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:59,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:59,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:22:59,294 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)] === [2024-06-14 12:22:59,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2011207859, now seen corresponding path program 6 times [2024-06-14 12:22:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029074339] [2024-06-14 12:22:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:00,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:00,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029074339] [2024-06-14 12:23:00,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029074339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:00,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:00,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:23:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798244475] [2024-06-14 12:23:00,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:00,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:23:00,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:00,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:23:00,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:23:00,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:23:00,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 636 transitions, 10673 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:00,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:00,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:23:00,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:02,474 INFO L124 PetriNetUnfolderBase]: 6316/9757 cut-off events. [2024-06-14 12:23:02,474 INFO L125 PetriNetUnfolderBase]: For 1749535/1749539 co-relation queries the response was YES. [2024-06-14 12:23:02,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93628 conditions, 9757 events. 6316/9757 cut-off events. For 1749535/1749539 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 59939 event pairs, 1598 based on Foata normal form. 6/9762 useless extension candidates. Maximal degree in co-relation 93439. Up to 9508 conditions per place. [2024-06-14 12:23:02,654 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 98 changer transitions 0/653 dead transitions. [2024-06-14 12:23:02,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 653 transitions, 12035 flow [2024-06-14 12:23:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:23:02,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:23:02,655 INFO L175 Difference]: Start difference. First operand has 387 places, 636 transitions, 10673 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:23:02,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 653 transitions, 12035 flow [2024-06-14 12:23:10,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 653 transitions, 11877 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:11,000 INFO L231 Difference]: Finished difference. Result has 390 places, 637 transitions, 10739 flow [2024-06-14 12:23:11,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10515, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10739, PETRI_PLACES=390, PETRI_TRANSITIONS=637} [2024-06-14 12:23:11,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 12:23:11,001 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 637 transitions, 10739 flow [2024-06-14 12:23:11,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:23:11,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:11,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:11,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:23:11,002 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)] === [2024-06-14 12:23:11,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:11,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1715746673, now seen corresponding path program 1 times [2024-06-14 12:23:11,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:11,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420753274] [2024-06-14 12:23:11,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:11,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:12,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:12,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420753274] [2024-06-14 12:23:12,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420753274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:12,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:12,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091643777] [2024-06-14 12:23:12,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:12,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:12,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:12,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:12,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:23:12,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 637 transitions, 10739 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:12,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:12,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:23:12,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:14,869 INFO L124 PetriNetUnfolderBase]: 6344/9811 cut-off events. [2024-06-14 12:23:14,869 INFO L125 PetriNetUnfolderBase]: For 1840568/1840574 co-relation queries the response was YES. [2024-06-14 12:23:14,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93662 conditions, 9811 events. 6344/9811 cut-off events. For 1840568/1840574 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 60397 event pairs, 1169 based on Foata normal form. 26/9836 useless extension candidates. Maximal degree in co-relation 93471. Up to 9279 conditions per place. [2024-06-14 12:23:15,032 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 533 selfloop transitions, 139 changer transitions 0/675 dead transitions. [2024-06-14 12:23:15,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 675 transitions, 12664 flow [2024-06-14 12:23:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:15,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:23:15,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:23:15,034 INFO L175 Difference]: Start difference. First operand has 390 places, 637 transitions, 10739 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:23:15,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 675 transitions, 12664 flow [2024-06-14 12:23:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 675 transitions, 12430 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 12:23:20,972 INFO L231 Difference]: Finished difference. Result has 394 places, 649 transitions, 11083 flow [2024-06-14 12:23:20,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10505, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11083, PETRI_PLACES=394, PETRI_TRANSITIONS=649} [2024-06-14 12:23:20,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-14 12:23:20,978 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 649 transitions, 11083 flow [2024-06-14 12:23:20,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:20,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:20,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:20,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:23:20,978 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)] === [2024-06-14 12:23:20,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1791373157, now seen corresponding path program 2 times [2024-06-14 12:23:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:20,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789687158] [2024-06-14 12:23:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:20,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789687158] [2024-06-14 12:23:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789687158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:22,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517516644] [2024-06-14 12:23:22,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:22,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:22,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:23:22,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 649 transitions, 11083 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:22,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:22,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:23:22,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:24,773 INFO L124 PetriNetUnfolderBase]: 6353/9822 cut-off events. [2024-06-14 12:23:24,773 INFO L125 PetriNetUnfolderBase]: For 1792834/1792838 co-relation queries the response was YES. [2024-06-14 12:23:24,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93642 conditions, 9822 events. 6353/9822 cut-off events. For 1792834/1792838 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 60437 event pairs, 1682 based on Foata normal form. 16/9837 useless extension candidates. Maximal degree in co-relation 93450. Up to 9541 conditions per place. [2024-06-14 12:23:24,936 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 563 selfloop transitions, 110 changer transitions 0/676 dead transitions. [2024-06-14 12:23:24,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 676 transitions, 12653 flow [2024-06-14 12:23:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:23:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:23:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:23:24,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:23:24,937 INFO L175 Difference]: Start difference. First operand has 394 places, 649 transitions, 11083 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:23:24,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 676 transitions, 12653 flow [2024-06-14 12:23:31,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 676 transitions, 12246 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:31,862 INFO L231 Difference]: Finished difference. Result has 397 places, 655 transitions, 11080 flow [2024-06-14 12:23:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10682, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11080, PETRI_PLACES=397, PETRI_TRANSITIONS=655} [2024-06-14 12:23:31,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 12:23:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 655 transitions, 11080 flow [2024-06-14 12:23:31,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:31,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:31,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:31,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:23:31,864 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)] === [2024-06-14 12:23:31,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1775211981, now seen corresponding path program 1 times [2024-06-14 12:23:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729464323] [2024-06-14 12:23:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:31,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:32,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729464323] [2024-06-14 12:23:32,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729464323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:32,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:32,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:32,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187072178] [2024-06-14 12:23:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:32,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:32,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:32,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:23:32,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 655 transitions, 11080 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:32,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:32,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:23:32,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:35,696 INFO L124 PetriNetUnfolderBase]: 6373/9850 cut-off events. [2024-06-14 12:23:35,697 INFO L125 PetriNetUnfolderBase]: For 1776480/1776484 co-relation queries the response was YES. [2024-06-14 12:23:35,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93736 conditions, 9850 events. 6373/9850 cut-off events. For 1776480/1776484 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60626 event pairs, 1692 based on Foata normal form. 8/9857 useless extension candidates. Maximal degree in co-relation 93543. Up to 9415 conditions per place. [2024-06-14 12:23:35,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 557 selfloop transitions, 129 changer transitions 0/689 dead transitions. [2024-06-14 12:23:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 689 transitions, 12876 flow [2024-06-14 12:23:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:23:35,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:23:35,874 INFO L175 Difference]: Start difference. First operand has 397 places, 655 transitions, 11080 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:23:35,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 689 transitions, 12876 flow [2024-06-14 12:23:42,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 689 transitions, 12606 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:23:42,680 INFO L231 Difference]: Finished difference. Result has 400 places, 661 transitions, 11188 flow [2024-06-14 12:23:42,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10810, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11188, PETRI_PLACES=400, PETRI_TRANSITIONS=661} [2024-06-14 12:23:42,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 12:23:42,681 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 661 transitions, 11188 flow [2024-06-14 12:23:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:42,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:42,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:42,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:23:42,681 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)] === [2024-06-14 12:23:42,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2086949229, now seen corresponding path program 2 times [2024-06-14 12:23:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:42,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160875064] [2024-06-14 12:23:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:43,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:43,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160875064] [2024-06-14 12:23:43,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160875064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:43,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:43,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811971525] [2024-06-14 12:23:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:43,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:43,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:43,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:43,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:23:43,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 661 transitions, 11188 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:43,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:43,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:23:43,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:46,389 INFO L124 PetriNetUnfolderBase]: 6457/9960 cut-off events. [2024-06-14 12:23:46,390 INFO L125 PetriNetUnfolderBase]: For 1860502/1860506 co-relation queries the response was YES. [2024-06-14 12:23:46,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96178 conditions, 9960 events. 6457/9960 cut-off events. For 1860502/1860506 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 61142 event pairs, 1606 based on Foata normal form. 8/9967 useless extension candidates. Maximal degree in co-relation 95984. Up to 9479 conditions per place. [2024-06-14 12:23:46,596 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 135 changer transitions 0/697 dead transitions. [2024-06-14 12:23:46,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 697 transitions, 13506 flow [2024-06-14 12:23:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:23:46,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:23:46,597 INFO L175 Difference]: Start difference. First operand has 400 places, 661 transitions, 11188 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:23:46,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 697 transitions, 13506 flow [2024-06-14 12:23:54,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 697 transitions, 13293 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:23:54,259 INFO L231 Difference]: Finished difference. Result has 404 places, 670 transitions, 11431 flow [2024-06-14 12:23:54,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11023, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11431, PETRI_PLACES=404, PETRI_TRANSITIONS=670} [2024-06-14 12:23:54,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 12:23:54,260 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 670 transitions, 11431 flow [2024-06-14 12:23:54,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:54,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:23:54,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:23:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:23:54,261 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)] === [2024-06-14 12:23:54,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:23:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2086603269, now seen corresponding path program 3 times [2024-06-14 12:23:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:23:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571892352] [2024-06-14 12:23:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:23:54,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:23:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:23:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:23:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:23:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571892352] [2024-06-14 12:23:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571892352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:23:55,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:23:55,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:23:55,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870689188] [2024-06-14 12:23:55,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:23:55,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:23:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:23:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:23:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:23:55,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:23:55,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 670 transitions, 11431 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:23:55,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:23:55,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:23:55,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:23:57,946 INFO L124 PetriNetUnfolderBase]: 6445/9944 cut-off events. [2024-06-14 12:23:57,946 INFO L125 PetriNetUnfolderBase]: For 1865910/1865914 co-relation queries the response was YES. [2024-06-14 12:23:58,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95857 conditions, 9944 events. 6445/9944 cut-off events. For 1865910/1865914 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 61046 event pairs, 1602 based on Foata normal form. 8/9951 useless extension candidates. Maximal degree in co-relation 95661. Up to 9471 conditions per place. [2024-06-14 12:23:58,115 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 571 selfloop transitions, 123 changer transitions 0/697 dead transitions. [2024-06-14 12:23:58,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 697 transitions, 13355 flow [2024-06-14 12:23:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:23:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:23:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:23:58,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:23:58,117 INFO L175 Difference]: Start difference. First operand has 404 places, 670 transitions, 11431 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:23:58,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 697 transitions, 13355 flow [2024-06-14 12:24:04,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 697 transitions, 13117 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:04,560 INFO L231 Difference]: Finished difference. Result has 409 places, 670 transitions, 11445 flow [2024-06-14 12:24:04,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11193, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11445, PETRI_PLACES=409, PETRI_TRANSITIONS=670} [2024-06-14 12:24:04,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-14 12:24:04,560 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 670 transitions, 11445 flow [2024-06-14 12:24:04,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:24:04,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:04,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:04,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:24:04,561 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)] === [2024-06-14 12:24:04,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash -282122707, now seen corresponding path program 4 times [2024-06-14 12:24:04,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:04,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673119419] [2024-06-14 12:24:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:05,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673119419] [2024-06-14 12:24:05,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673119419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:05,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:05,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:24:05,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195283491] [2024-06-14 12:24:05,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:05,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:24:05,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:05,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:24:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:24:05,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:24:05,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 670 transitions, 11445 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:24:05,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:05,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:24:05,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:08,390 INFO L124 PetriNetUnfolderBase]: 6433/9928 cut-off events. [2024-06-14 12:24:08,390 INFO L125 PetriNetUnfolderBase]: For 1873116/1873120 co-relation queries the response was YES. [2024-06-14 12:24:08,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95454 conditions, 9928 events. 6433/9928 cut-off events. For 1873116/1873120 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60953 event pairs, 1596 based on Foata normal form. 8/9935 useless extension candidates. Maximal degree in co-relation 95257. Up to 9463 conditions per place. [2024-06-14 12:24:08,535 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 137 changer transitions 0/694 dead transitions. [2024-06-14 12:24:08,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 694 transitions, 13133 flow [2024-06-14 12:24:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:08,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:24:08,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:24:08,536 INFO L175 Difference]: Start difference. First operand has 409 places, 670 transitions, 11445 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:24:08,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 694 transitions, 13133 flow [2024-06-14 12:24:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 694 transitions, 12831 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:15,309 INFO L231 Difference]: Finished difference. Result has 410 places, 670 transitions, 11423 flow [2024-06-14 12:24:15,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11143, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11423, PETRI_PLACES=410, PETRI_TRANSITIONS=670} [2024-06-14 12:24:15,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 12:24:15,310 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 670 transitions, 11423 flow [2024-06-14 12:24:15,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:24:15,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:15,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:15,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:24:15,311 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)] === [2024-06-14 12:24:15,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:15,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2011204883, now seen corresponding path program 3 times [2024-06-14 12:24:15,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:15,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218173726] [2024-06-14 12:24:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:15,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:16,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:16,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218173726] [2024-06-14 12:24:16,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218173726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:16,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:16,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:24:16,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896331029] [2024-06-14 12:24:16,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:16,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:24:16,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:24:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:24:16,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:24:16,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 670 transitions, 11423 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:24:16,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:16,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:24:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:19,306 INFO L124 PetriNetUnfolderBase]: 6431/9926 cut-off events. [2024-06-14 12:24:19,306 INFO L125 PetriNetUnfolderBase]: For 1891791/1891795 co-relation queries the response was YES. [2024-06-14 12:24:19,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95207 conditions, 9926 events. 6431/9926 cut-off events. For 1891791/1891795 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60943 event pairs, 1603 based on Foata normal form. 10/9935 useless extension candidates. Maximal degree in co-relation 95009. Up to 9669 conditions per place. [2024-06-14 12:24:19,528 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 100 changer transitions 0/688 dead transitions. [2024-06-14 12:24:19,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 688 transitions, 12896 flow [2024-06-14 12:24:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:24:19,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:24:19,529 INFO L175 Difference]: Start difference. First operand has 410 places, 670 transitions, 11423 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:24:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 688 transitions, 12896 flow [2024-06-14 12:24:27,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 688 transitions, 12576 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 12:24:27,922 INFO L231 Difference]: Finished difference. Result has 410 places, 672 transitions, 11369 flow [2024-06-14 12:24:27,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11103, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11369, PETRI_PLACES=410, PETRI_TRANSITIONS=672} [2024-06-14 12:24:27,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 12:24:27,923 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 672 transitions, 11369 flow [2024-06-14 12:24:27,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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) [2024-06-14 12:24:27,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:27,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:24:27,924 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)] === [2024-06-14 12:24:27,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash 258596659, now seen corresponding path program 7 times [2024-06-14 12:24:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:27,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436801931] [2024-06-14 12:24:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:27,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:28,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436801931] [2024-06-14 12:24:28,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436801931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:28,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:28,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:28,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769157060] [2024-06-14 12:24:28,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:28,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:28,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:28,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:28,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:24:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 672 transitions, 11369 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:29,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:24:29,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:32,072 INFO L124 PetriNetUnfolderBase]: 6461/9971 cut-off events. [2024-06-14 12:24:32,073 INFO L125 PetriNetUnfolderBase]: For 1925268/1925274 co-relation queries the response was YES. [2024-06-14 12:24:32,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95587 conditions, 9971 events. 6461/9971 cut-off events. For 1925268/1925274 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61268 event pairs, 1527 based on Foata normal form. 12/9982 useless extension candidates. Maximal degree in co-relation 95388. Up to 8690 conditions per place. [2024-06-14 12:24:32,302 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 217 changer transitions 0/705 dead transitions. [2024-06-14 12:24:32,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 705 transitions, 13681 flow [2024-06-14 12:24:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:24:32,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 12:24:32,304 INFO L175 Difference]: Start difference. First operand has 410 places, 672 transitions, 11369 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:24:32,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 705 transitions, 13681 flow [2024-06-14 12:24:42,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 705 transitions, 13460 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:42,838 INFO L231 Difference]: Finished difference. Result has 413 places, 679 transitions, 11729 flow [2024-06-14 12:24:42,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11729, PETRI_PLACES=413, PETRI_TRANSITIONS=679} [2024-06-14 12:24:42,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-14 12:24:42,839 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 679 transitions, 11729 flow [2024-06-14 12:24:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:42,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:42,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:42,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:24:42,840 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)] === [2024-06-14 12:24:42,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash 258895561, now seen corresponding path program 4 times [2024-06-14 12:24:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275409104] [2024-06-14 12:24:42,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:42,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:43,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:43,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275409104] [2024-06-14 12:24:43,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275409104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:43,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:43,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:43,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109191184] [2024-06-14 12:24:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:43,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:43,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:43,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:43,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:43,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:24:43,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 679 transitions, 11729 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:43,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:43,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:24:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:46,396 INFO L124 PetriNetUnfolderBase]: 6471/9985 cut-off events. [2024-06-14 12:24:46,396 INFO L125 PetriNetUnfolderBase]: For 1933423/1933431 co-relation queries the response was YES. [2024-06-14 12:24:46,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96661 conditions, 9985 events. 6471/9985 cut-off events. For 1933423/1933431 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 61410 event pairs, 1727 based on Foata normal form. 10/9994 useless extension candidates. Maximal degree in co-relation 96461. Up to 9658 conditions per place. [2024-06-14 12:24:46,561 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 631 selfloop transitions, 88 changer transitions 0/722 dead transitions. [2024-06-14 12:24:46,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 722 transitions, 14097 flow [2024-06-14 12:24:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:24:46,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:24:46,563 INFO L175 Difference]: Start difference. First operand has 413 places, 679 transitions, 11729 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:24:46,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 722 transitions, 14097 flow [2024-06-14 12:24:52,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 722 transitions, 13677 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:52,465 INFO L231 Difference]: Finished difference. Result has 417 places, 699 transitions, 11855 flow [2024-06-14 12:24:52,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11309, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11855, PETRI_PLACES=417, PETRI_TRANSITIONS=699} [2024-06-14 12:24:52,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 12:24:52,465 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 699 transitions, 11855 flow [2024-06-14 12:24:52,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:52,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:52,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:52,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:24:52,466 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)] === [2024-06-14 12:24:52,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:52,466 INFO L85 PathProgramCache]: Analyzing trace with hash 258895189, now seen corresponding path program 8 times [2024-06-14 12:24:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:52,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073006610] [2024-06-14 12:24:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:52,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:53,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:53,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073006610] [2024-06-14 12:24:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073006610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:53,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:53,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293495027] [2024-06-14 12:24:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:53,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:24:53,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 699 transitions, 11855 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:53,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:53,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:24:53,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:55,959 INFO L124 PetriNetUnfolderBase]: 6529/10066 cut-off events. [2024-06-14 12:24:55,960 INFO L125 PetriNetUnfolderBase]: For 2013990/2013996 co-relation queries the response was YES. [2024-06-14 12:24:56,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97783 conditions, 10066 events. 6529/10066 cut-off events. For 2013990/2013996 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61860 event pairs, 1548 based on Foata normal form. 12/10077 useless extension candidates. Maximal degree in co-relation 97581. Up to 8752 conditions per place. [2024-06-14 12:24:56,240 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 223 changer transitions 0/733 dead transitions. [2024-06-14 12:24:56,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 733 transitions, 14294 flow [2024-06-14 12:24:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:24:56,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:24:56,242 INFO L175 Difference]: Start difference. First operand has 417 places, 699 transitions, 11855 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:24:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 733 transitions, 14294 flow [2024-06-14 12:25:05,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 733 transitions, 14086 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-14 12:25:05,844 INFO L231 Difference]: Finished difference. Result has 423 places, 710 transitions, 12341 flow [2024-06-14 12:25:05,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11647, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12341, PETRI_PLACES=423, PETRI_TRANSITIONS=710} [2024-06-14 12:25:05,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 12:25:05,845 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 710 transitions, 12341 flow [2024-06-14 12:25:05,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:05,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:05,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:05,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:25:05,845 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)] === [2024-06-14 12:25:05,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:05,846 INFO L85 PathProgramCache]: Analyzing trace with hash 302243143, now seen corresponding path program 5 times [2024-06-14 12:25:05,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:05,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046262498] [2024-06-14 12:25:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:06,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:06,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046262498] [2024-06-14 12:25:06,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046262498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:06,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:06,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:06,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684118430] [2024-06-14 12:25:06,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:06,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:06,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:06,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:06,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:06,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:25:06,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 710 transitions, 12341 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:06,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:06,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:25:06,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:09,614 INFO L124 PetriNetUnfolderBase]: 6555/10102 cut-off events. [2024-06-14 12:25:09,614 INFO L125 PetriNetUnfolderBase]: For 2036919/2036927 co-relation queries the response was YES. [2024-06-14 12:25:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99195 conditions, 10102 events. 6555/10102 cut-off events. For 2036919/2036927 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62178 event pairs, 1730 based on Foata normal form. 10/10111 useless extension candidates. Maximal degree in co-relation 98990. Up to 9764 conditions per place. [2024-06-14 12:25:09,784 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 638 selfloop transitions, 97 changer transitions 0/738 dead transitions. [2024-06-14 12:25:09,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 738 transitions, 14624 flow [2024-06-14 12:25:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:25:09,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:25:09,786 INFO L175 Difference]: Start difference. First operand has 423 places, 710 transitions, 12341 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:25:09,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 738 transitions, 14624 flow [2024-06-14 12:25:17,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 738 transitions, 14235 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:17,688 INFO L231 Difference]: Finished difference. Result has 429 places, 720 transitions, 12426 flow [2024-06-14 12:25:17,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11952, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12426, PETRI_PLACES=429, PETRI_TRANSITIONS=720} [2024-06-14 12:25:17,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-14 12:25:17,689 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 720 transitions, 12426 flow [2024-06-14 12:25:17,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:17,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:17,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:17,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:25:17,690 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)] === [2024-06-14 12:25:17,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:17,690 INFO L85 PathProgramCache]: Analyzing trace with hash 613574311, now seen corresponding path program 6 times [2024-06-14 12:25:17,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:17,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000114607] [2024-06-14 12:25:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:17,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:18,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000114607] [2024-06-14 12:25:18,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000114607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:18,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:18,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660266312] [2024-06-14 12:25:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:18,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:18,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:25:18,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 720 transitions, 12426 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:18,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:18,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:25:18,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:21,988 INFO L124 PetriNetUnfolderBase]: 6549/10094 cut-off events. [2024-06-14 12:25:21,988 INFO L125 PetriNetUnfolderBase]: For 2055994/2056002 co-relation queries the response was YES. [2024-06-14 12:25:22,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98828 conditions, 10094 events. 6549/10094 cut-off events. For 2055994/2056002 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62102 event pairs, 1734 based on Foata normal form. 10/10103 useless extension candidates. Maximal degree in co-relation 98620. Up to 9759 conditions per place. [2024-06-14 12:25:22,156 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 99 changer transitions 0/737 dead transitions. [2024-06-14 12:25:22,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 737 transitions, 14248 flow [2024-06-14 12:25:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:25:22,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:25:22,158 INFO L175 Difference]: Start difference. First operand has 429 places, 720 transitions, 12426 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:25:22,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 737 transitions, 14248 flow [2024-06-14 12:25:30,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 737 transitions, 13981 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-14 12:25:30,706 INFO L231 Difference]: Finished difference. Result has 434 places, 720 transitions, 12364 flow [2024-06-14 12:25:30,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12159, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12364, PETRI_PLACES=434, PETRI_TRANSITIONS=720} [2024-06-14 12:25:30,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 12:25:30,706 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 720 transitions, 12364 flow [2024-06-14 12:25:30,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:30,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:30,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:30,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:25:30,707 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)] === [2024-06-14 12:25:30,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash 269072179, now seen corresponding path program 9 times [2024-06-14 12:25:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671179741] [2024-06-14 12:25:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:31,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671179741] [2024-06-14 12:25:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671179741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:31,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882526116] [2024-06-14 12:25:31,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:31,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:31,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:25:31,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 720 transitions, 12364 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:31,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:31,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:25:31,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:35,186 INFO L124 PetriNetUnfolderBase]: 6551/10098 cut-off events. [2024-06-14 12:25:35,187 INFO L125 PetriNetUnfolderBase]: For 2089095/2089101 co-relation queries the response was YES. [2024-06-14 12:25:35,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98592 conditions, 10098 events. 6551/10098 cut-off events. For 2089095/2089101 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62047 event pairs, 1526 based on Foata normal form. 12/10109 useless extension candidates. Maximal degree in co-relation 98383. Up to 8783 conditions per place. [2024-06-14 12:25:35,346 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 496 selfloop transitions, 244 changer transitions 0/743 dead transitions. [2024-06-14 12:25:35,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 743 transitions, 14698 flow [2024-06-14 12:25:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:25:35,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:25:35,347 INFO L175 Difference]: Start difference. First operand has 434 places, 720 transitions, 12364 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:25:35,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 743 transitions, 14698 flow [2024-06-14 12:25:44,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 743 transitions, 14499 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:44,386 INFO L231 Difference]: Finished difference. Result has 436 places, 723 transitions, 12740 flow [2024-06-14 12:25:44,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12165, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12740, PETRI_PLACES=436, PETRI_TRANSITIONS=723} [2024-06-14 12:25:44,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 12:25:44,387 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 723 transitions, 12740 flow [2024-06-14 12:25:44,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:44,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:44,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:25:44,387 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)] === [2024-06-14 12:25:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -217833693, now seen corresponding path program 7 times [2024-06-14 12:25:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634784238] [2024-06-14 12:25:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:45,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634784238] [2024-06-14 12:25:45,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634784238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:45,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:45,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:45,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668644855] [2024-06-14 12:25:45,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:45,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:45,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:45,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:25:45,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 723 transitions, 12740 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:45,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:45,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:25:45,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:48,666 INFO L124 PetriNetUnfolderBase]: 6564/10116 cut-off events. [2024-06-14 12:25:48,667 INFO L125 PetriNetUnfolderBase]: For 2099057/2099065 co-relation queries the response was YES. [2024-06-14 12:25:48,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99937 conditions, 10116 events. 6564/10116 cut-off events. For 2099057/2099065 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62183 event pairs, 1720 based on Foata normal form. 9/10124 useless extension candidates. Maximal degree in co-relation 99727. Up to 10007 conditions per place. [2024-06-14 12:25:48,831 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 690 selfloop transitions, 49 changer transitions 0/742 dead transitions. [2024-06-14 12:25:48,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 742 transitions, 14698 flow [2024-06-14 12:25:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 12:25:48,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-14 12:25:48,832 INFO L175 Difference]: Start difference. First operand has 436 places, 723 transitions, 12740 flow. Second operand 8 states and 116 transitions. [2024-06-14 12:25:48,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 742 transitions, 14698 flow [2024-06-14 12:25:57,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 742 transitions, 14034 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:25:57,082 INFO L231 Difference]: Finished difference. Result has 437 places, 731 transitions, 12415 flow [2024-06-14 12:25:57,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12076, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12415, PETRI_PLACES=437, PETRI_TRANSITIONS=731} [2024-06-14 12:25:57,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 12:25:57,083 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 731 transitions, 12415 flow [2024-06-14 12:25:57,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:57,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:57,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:57,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:25:57,083 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)] === [2024-06-14 12:25:57,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1093486297, now seen corresponding path program 8 times [2024-06-14 12:25:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658195727] [2024-06-14 12:25:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:57,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:57,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658195727] [2024-06-14 12:25:57,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658195727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:57,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:57,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:57,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782925742] [2024-06-14 12:25:57,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:57,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:57,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:25:57,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 731 transitions, 12415 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:57,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:57,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:25:57,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:01,374 INFO L124 PetriNetUnfolderBase]: 6561/10112 cut-off events. [2024-06-14 12:26:01,375 INFO L125 PetriNetUnfolderBase]: For 2119683/2119691 co-relation queries the response was YES. [2024-06-14 12:26:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99049 conditions, 10112 events. 6561/10112 cut-off events. For 2119683/2119691 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62168 event pairs, 1720 based on Foata normal form. 9/10120 useless extension candidates. Maximal degree in co-relation 98838. Up to 10006 conditions per place. [2024-06-14 12:26:01,614 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 699 selfloop transitions, 43 changer transitions 0/745 dead transitions. [2024-06-14 12:26:01,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 745 transitions, 14283 flow [2024-06-14 12:26:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:26:01,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-14 12:26:01,616 INFO L175 Difference]: Start difference. First operand has 437 places, 731 transitions, 12415 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:26:01,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 745 transitions, 14283 flow [2024-06-14 12:26:10,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 745 transitions, 14128 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 12:26:10,342 INFO L231 Difference]: Finished difference. Result has 441 places, 734 transitions, 12468 flow [2024-06-14 12:26:10,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12260, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12468, PETRI_PLACES=441, PETRI_TRANSITIONS=734} [2024-06-14 12:26:10,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 12:26:10,342 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 734 transitions, 12468 flow [2024-06-14 12:26:10,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:10,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:10,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:10,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:26:10,343 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)] === [2024-06-14 12:26:10,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash -961726809, now seen corresponding path program 9 times [2024-06-14 12:26:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:10,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95022420] [2024-06-14 12:26:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:10,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:11,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:11,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95022420] [2024-06-14 12:26:11,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95022420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:11,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083971359] [2024-06-14 12:26:11,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:11,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:11,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:11,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:26:11,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 734 transitions, 12468 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:11,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:11,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:26:11,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:14,830 INFO L124 PetriNetUnfolderBase]: 6566/10119 cut-off events. [2024-06-14 12:26:14,830 INFO L125 PetriNetUnfolderBase]: For 2154075/2154083 co-relation queries the response was YES. [2024-06-14 12:26:14,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99490 conditions, 10119 events. 6566/10119 cut-off events. For 2154075/2154083 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 62210 event pairs, 1718 based on Foata normal form. 9/10127 useless extension candidates. Maximal degree in co-relation 99277. Up to 9978 conditions per place. [2024-06-14 12:26:14,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 682 selfloop transitions, 69 changer transitions 0/754 dead transitions. [2024-06-14 12:26:14,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 754 transitions, 14704 flow [2024-06-14 12:26:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:26:14,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:26:14,993 INFO L175 Difference]: Start difference. First operand has 441 places, 734 transitions, 12468 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:26:14,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 754 transitions, 14704 flow [2024-06-14 12:26:24,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 754 transitions, 14539 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:24,297 INFO L231 Difference]: Finished difference. Result has 445 places, 742 transitions, 12685 flow [2024-06-14 12:26:24,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12303, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12685, PETRI_PLACES=445, PETRI_TRANSITIONS=742} [2024-06-14 12:26:24,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 12:26:24,298 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 742 transitions, 12685 flow [2024-06-14 12:26:24,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:24,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:24,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:24,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:26:24,298 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)] === [2024-06-14 12:26:24,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:24,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1616103877, now seen corresponding path program 10 times [2024-06-14 12:26:24,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:24,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508999654] [2024-06-14 12:26:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:24,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508999654] [2024-06-14 12:26:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508999654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:25,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099769246] [2024-06-14 12:26:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:25,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:26:25,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 742 transitions, 12685 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:25,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:25,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:26:25,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:28,427 INFO L124 PetriNetUnfolderBase]: 6571/10126 cut-off events. [2024-06-14 12:26:28,428 INFO L125 PetriNetUnfolderBase]: For 2189238/2189246 co-relation queries the response was YES. [2024-06-14 12:26:28,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99968 conditions, 10126 events. 6571/10126 cut-off events. For 2189238/2189246 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 62271 event pairs, 1720 based on Foata normal form. 9/10134 useless extension candidates. Maximal degree in co-relation 99753. Up to 10029 conditions per place. [2024-06-14 12:26:28,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 711 selfloop transitions, 41 changer transitions 0/755 dead transitions. [2024-06-14 12:26:28,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 755 transitions, 14309 flow [2024-06-14 12:26:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-14 12:26:28,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-14 12:26:28,588 INFO L175 Difference]: Start difference. First operand has 445 places, 742 transitions, 12685 flow. Second operand 8 states and 114 transitions. [2024-06-14 12:26:28,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 755 transitions, 14309 flow [2024-06-14 12:26:37,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 755 transitions, 14075 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:37,113 INFO L231 Difference]: Finished difference. Result has 448 places, 745 transitions, 12635 flow [2024-06-14 12:26:37,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12457, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12635, PETRI_PLACES=448, PETRI_TRANSITIONS=745} [2024-06-14 12:26:37,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-14 12:26:37,129 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 745 transitions, 12635 flow [2024-06-14 12:26:37,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:37,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:37,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:37,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:26:37,130 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)] === [2024-06-14 12:26:37,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:37,131 INFO L85 PathProgramCache]: Analyzing trace with hash 581789987, now seen corresponding path program 10 times [2024-06-14 12:26:37,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:37,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830191050] [2024-06-14 12:26:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:37,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:37,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:37,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830191050] [2024-06-14 12:26:37,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830191050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:37,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:37,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:37,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422927491] [2024-06-14 12:26:37,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:37,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:37,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:37,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:26:37,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 745 transitions, 12635 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:37,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:37,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:26:37,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:41,338 INFO L124 PetriNetUnfolderBase]: 6561/10112 cut-off events. [2024-06-14 12:26:41,338 INFO L125 PetriNetUnfolderBase]: For 2211128/2211134 co-relation queries the response was YES. [2024-06-14 12:26:41,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99598 conditions, 10112 events. 6561/10112 cut-off events. For 2211128/2211134 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 62130 event pairs, 1608 based on Foata normal form. 8/10119 useless extension candidates. Maximal degree in co-relation 99382. Up to 9864 conditions per place. [2024-06-14 12:26:41,524 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 658 selfloop transitions, 95 changer transitions 0/756 dead transitions. [2024-06-14 12:26:41,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 756 transitions, 14175 flow [2024-06-14 12:26:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:41,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:26:41,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:26:41,526 INFO L175 Difference]: Start difference. First operand has 448 places, 745 transitions, 12635 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:26:41,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 756 transitions, 14175 flow [2024-06-14 12:26:50,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 756 transitions, 14025 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:26:50,493 INFO L231 Difference]: Finished difference. Result has 450 places, 745 transitions, 12681 flow [2024-06-14 12:26:50,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12681, PETRI_PLACES=450, PETRI_TRANSITIONS=745} [2024-06-14 12:26:50,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 12:26:50,493 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 745 transitions, 12681 flow [2024-06-14 12:26:50,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:50,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:50,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:50,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:26:50,494 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)] === [2024-06-14 12:26:50,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash 908021597, now seen corresponding path program 11 times [2024-06-14 12:26:50,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523420559] [2024-06-14 12:26:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:50,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:51,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:51,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523420559] [2024-06-14 12:26:51,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523420559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:51,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:51,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:51,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123421669] [2024-06-14 12:26:51,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:51,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:51,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:26:51,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 745 transitions, 12681 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:51,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:51,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:26:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand