./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:28:34,413 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:28:34,477 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:28:34,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:28:34,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:28:34,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:28:34,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:28:34,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:28:34,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:28:34,511 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:28:34,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:28:34,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:28:34,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:28:34,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:28:34,513 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:28:34,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:28:34,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:28:34,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:28:34,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:28:34,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:28:34,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:28:34,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:28:34,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:28:34,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:28:34,516 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:28:34,517 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:28:34,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:28:34,517 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:28:34,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:28:34,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:28:34,519 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:28:34,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:28:34,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:28:34,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:28:34,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:28:34,519 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:28:34,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:28:34,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:28:34,520 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:28:34,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:28:34,520 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:28:34,521 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:28:34,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:28:34,521 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:28:34,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:28:34,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:28:34,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:28:34,773 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:28:34,774 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:28:34,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 17:28:34,920 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:28:34,921 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:28:34,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-20 17:28:35,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:28:36,157 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:28:36,157 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-20 17:28:36,167 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1f44a37/11d7b7034a4543d991afe598a2cdba9d/FLAGa48f383b6 [2024-06-20 17:28:36,182 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1f44a37/11d7b7034a4543d991afe598a2cdba9d [2024-06-20 17:28:36,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:28:36,184 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:28:36,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:28:36,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:28:36,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:28:36,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:28:34" (1/2) ... [2024-06-20 17:28:36,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bdbd64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:28:36, skipping insertion in model container [2024-06-20 17:28:36,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:28:34" (1/2) ... [2024-06-20 17:28:36,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c5e0a9a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:28:36, skipping insertion in model container [2024-06-20 17:28:36,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:28:36" (2/2) ... [2024-06-20 17:28:36,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55bdbd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36, skipping insertion in model container [2024-06-20 17:28:36,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:28:36" (2/2) ... [2024-06-20 17:28:36,194 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:28:36,277 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:28:36,278 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:28:36,278 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:28:36,279 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:28:36,279 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:28:36,279 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-20 17:28:36,315 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:28:36,641 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:28:36,650 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:28:36,767 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:28:36,816 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:28:36,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36 WrapperNode [2024-06-20 17:28:36,817 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:28:36,818 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:28:36,818 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:28:36,818 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:28:36,823 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,859 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-20 17:28:36,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:28:36,860 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:28:36,860 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:28:36,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:28:36,869 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,871 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,883 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 17:28:36,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,884 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:28:36,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:28:36,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:28:36,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:28:36,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (1/1) ... [2024-06-20 17:28:36,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:28:36,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:28:36,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:28:36,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:28:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:28:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:28:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:28:36,967 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:28:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:28:36,967 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:28:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:28:36,967 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:28:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:28:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:28:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:28:36,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:28:36,969 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:28:37,056 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:28:37,058 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:28:37,388 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:28:37,388 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:28:37,525 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:28:37,526 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:28:37,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:28:37 BoogieIcfgContainer [2024-06-20 17:28:37,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:28:37,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:28:37,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:28:37,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:28:37,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:28:34" (1/4) ... [2024-06-20 17:28:37,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e88be and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:28:37, skipping insertion in model container [2024-06-20 17:28:37,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:28:36" (2/4) ... [2024-06-20 17:28:37,532 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e88be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:28:37, skipping insertion in model container [2024-06-20 17:28:37,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:28:36" (3/4) ... [2024-06-20 17:28:37,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e88be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:28:37, skipping insertion in model container [2024-06-20 17:28:37,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:28:37" (4/4) ... [2024-06-20 17:28:37,534 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-20 17:28:37,547 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:28:37,547 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:28:37,548 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:28:37,587 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:28:37,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:28:37,660 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 17:28:37,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:28:37,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:28:37,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 17:28:37,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 17:28:37,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:28:37,683 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;@57673be8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:28:37,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:28:37,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:28:37,689 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:28:37,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:28:37,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:37,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:28:37,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:37,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash 364147537, now seen corresponding path program 1 times [2024-06-20 17:28:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:37,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801795859] [2024-06-20 17:28:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:38,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:38,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801795859] [2024-06-20 17:28:38,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801795859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:38,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:38,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:28:38,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637649212] [2024-06-20 17:28:38,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:28:38,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:28:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:28:38,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 17:28:38,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:38,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:38,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 17:28:38,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:38,942 INFO L124 PetriNetUnfolderBase]: 1059/1629 cut-off events. [2024-06-20 17:28:38,942 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-20 17:28:38,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1629 events. 1059/1629 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8049 event pairs, 698 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 3281. Up to 1593 conditions per place. [2024-06-20 17:28:38,955 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 17:28:38,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-20 17:28:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:28:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:28:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-20 17:28:38,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 17:28:38,966 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 74 transitions. [2024-06-20 17:28:38,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-20 17:28:38,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:38,971 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 17:28:38,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 17:28:38,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 17:28:38,975 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 17:28:38,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:38,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:38,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:38,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:28:38,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:38,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2054472650, now seen corresponding path program 1 times [2024-06-20 17:28:38,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:38,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346547357] [2024-06-20 17:28:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:38,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:39,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346547357] [2024-06-20 17:28:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346547357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:39,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:39,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:28:39,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53881830] [2024-06-20 17:28:39,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:39,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:28:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:28:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:28:39,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 17:28:39,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-20 17:28:39,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:39,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 17:28:39,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:39,760 INFO L124 PetriNetUnfolderBase]: 1053/1620 cut-off events. [2024-06-20 17:28:39,760 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-06-20 17:28:39,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 1620 events. 1053/1620 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7918 event pairs, 618 based on Foata normal form. 3/1621 useless extension candidates. Maximal degree in co-relation 3731. Up to 1569 conditions per place. [2024-06-20 17:28:39,767 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-20 17:28:39,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 236 flow [2024-06-20 17:28:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:28:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:28:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-20 17:28:39,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 17:28:39,769 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 96 transitions. [2024-06-20 17:28:39,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 236 flow [2024-06-20 17:28:39,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:28:39,771 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 17:28:39,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 17:28:39,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 17:28:39,772 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 17:28:39,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-20 17:28:39,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:39,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:39,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:28:39,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:39,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:39,773 INFO L85 PathProgramCache]: Analyzing trace with hash 964719951, now seen corresponding path program 1 times [2024-06-20 17:28:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:39,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148345109] [2024-06-20 17:28:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:39,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:40,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:40,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148345109] [2024-06-20 17:28:40,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148345109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:40,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:40,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812971991] [2024-06-20 17:28:40,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:40,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:40,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:40,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:40,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:40,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:40,785 INFO L124 PetriNetUnfolderBase]: 1342/2032 cut-off events. [2024-06-20 17:28:40,785 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-20 17:28:40,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 2032 events. 1342/2032 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9696 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-20 17:28:40,795 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-20 17:28:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 270 flow [2024-06-20 17:28:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:28:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:28:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-20 17:28:40,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-20 17:28:40,797 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 91 transitions. [2024-06-20 17:28:40,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 270 flow [2024-06-20 17:28:40,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 17:28:40,799 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2024-06-20 17:28:40,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-20 17:28:40,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-20 17:28:40,800 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2024-06-20 17:28:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:40,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:40,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:28:40,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:40,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash -250177554, now seen corresponding path program 1 times [2024-06-20 17:28:40,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:40,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349393629] [2024-06-20 17:28:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:40,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:41,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:41,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349393629] [2024-06-20 17:28:41,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349393629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:41,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:41,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:41,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450235982] [2024-06-20 17:28:41,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:41,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:41,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 17:28:41,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:41,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:41,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 17:28:41,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:41,753 INFO L124 PetriNetUnfolderBase]: 1333/2017 cut-off events. [2024-06-20 17:28:41,753 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-06-20 17:28:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 2017 events. 1333/2017 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9630 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-20 17:28:41,763 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-20 17:28:41,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 378 flow [2024-06-20 17:28:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-20 17:28:41,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-20 17:28:41,768 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 6 states and 131 transitions. [2024-06-20 17:28:41,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 378 flow [2024-06-20 17:28:41,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:41,772 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 205 flow [2024-06-20 17:28:41,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-20 17:28:41,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 17:28:41,774 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 205 flow [2024-06-20 17:28:41,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:41,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:41,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:28:41,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:41,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash -158451778, now seen corresponding path program 1 times [2024-06-20 17:28:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:41,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772672653] [2024-06-20 17:28:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:41,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:42,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:42,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772672653] [2024-06-20 17:28:42,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772672653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:42,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:42,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056907328] [2024-06-20 17:28:42,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:42,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:42,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:42,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 205 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) [2024-06-20 17:28:42,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:42,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:42,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:42,933 INFO L124 PetriNetUnfolderBase]: 1323/2003 cut-off events. [2024-06-20 17:28:42,934 INFO L125 PetriNetUnfolderBase]: For 3192/3192 co-relation queries the response was YES. [2024-06-20 17:28:42,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6113 conditions, 2003 events. 1323/2003 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9524 event pairs, 556 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 6095. Up to 1948 conditions per place. [2024-06-20 17:28:42,946 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-06-20 17:28:42,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 381 flow [2024-06-20 17:28:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 17:28:42,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-20 17:28:42,948 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 205 flow. Second operand 6 states and 107 transitions. [2024-06-20 17:28:42,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 381 flow [2024-06-20 17:28:42,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 352 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:42,954 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 230 flow [2024-06-20 17:28:42,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-20 17:28:42,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 17:28:42,957 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 230 flow [2024-06-20 17:28:42,957 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) [2024-06-20 17:28:42,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:42,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:42,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:28:42,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:42,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash 265243754, now seen corresponding path program 1 times [2024-06-20 17:28:42,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081932452] [2024-06-20 17:28:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081932452] [2024-06-20 17:28:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081932452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:43,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:43,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:43,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378099362] [2024-06-20 17:28:43,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:43,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:43,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 230 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) [2024-06-20 17:28:43,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:43,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:43,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:44,040 INFO L124 PetriNetUnfolderBase]: 1334/2025 cut-off events. [2024-06-20 17:28:44,041 INFO L125 PetriNetUnfolderBase]: For 4482/4486 co-relation queries the response was YES. [2024-06-20 17:28:44,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 2025 events. 1334/2025 cut-off events. For 4482/4486 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9750 event pairs, 557 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 6612. Up to 1947 conditions per place. [2024-06-20 17:28:44,053 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-20 17:28:44,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 478 flow [2024-06-20 17:28:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 17:28:44,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-20 17:28:44,054 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 230 flow. Second operand 6 states and 113 transitions. [2024-06-20 17:28:44,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 478 flow [2024-06-20 17:28:44,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 448 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:44,058 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 286 flow [2024-06-20 17:28:44,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-20 17:28:44,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 17:28:44,058 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 286 flow [2024-06-20 17:28:44,059 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) [2024-06-20 17:28:44,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:44,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:44,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:28:44,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:44,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash -577721786, now seen corresponding path program 2 times [2024-06-20 17:28:44,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:44,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954758831] [2024-06-20 17:28:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:44,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954758831] [2024-06-20 17:28:44,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954758831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:44,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:44,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296778902] [2024-06-20 17:28:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:44,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:44,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:44,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:44,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 286 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) [2024-06-20 17:28:44,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:44,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:44,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:45,129 INFO L124 PetriNetUnfolderBase]: 1329/2012 cut-off events. [2024-06-20 17:28:45,129 INFO L125 PetriNetUnfolderBase]: For 6020/6020 co-relation queries the response was YES. [2024-06-20 17:28:45,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7059 conditions, 2012 events. 1329/2012 cut-off events. For 6020/6020 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9663 event pairs, 560 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 7038. Up to 1942 conditions per place. [2024-06-20 17:28:45,141 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-20 17:28:45,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 452 flow [2024-06-20 17:28:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 17:28:45,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:28:45,143 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 286 flow. Second operand 6 states and 108 transitions. [2024-06-20 17:28:45,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 452 flow [2024-06-20 17:28:45,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 418 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 17:28:45,147 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 292 flow [2024-06-20 17:28:45,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-20 17:28:45,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-20 17:28:45,148 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 292 flow [2024-06-20 17:28:45,148 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) [2024-06-20 17:28:45,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:45,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:28:45,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:45,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash -95457399, now seen corresponding path program 1 times [2024-06-20 17:28:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917999894] [2024-06-20 17:28:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:45,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:45,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917999894] [2024-06-20 17:28:45,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917999894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:45,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:45,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:45,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964389119] [2024-06-20 17:28:45,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:45,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:45,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:45,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:45,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:45,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:45,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:45,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:45,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:45,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:46,413 INFO L124 PetriNetUnfolderBase]: 1408/2139 cut-off events. [2024-06-20 17:28:46,414 INFO L125 PetriNetUnfolderBase]: For 7677/7677 co-relation queries the response was YES. [2024-06-20 17:28:46,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7673 conditions, 2139 events. 1408/2139 cut-off events. For 7677/7677 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10360 event pairs, 515 based on Foata normal form. 4/2142 useless extension candidates. Maximal degree in co-relation 7650. Up to 1947 conditions per place. [2024-06-20 17:28:46,431 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 68 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-20 17:28:46,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 787 flow [2024-06-20 17:28:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 17:28:46,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-20 17:28:46,435 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 292 flow. Second operand 8 states and 155 transitions. [2024-06-20 17:28:46,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 787 flow [2024-06-20 17:28:46,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 709 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:46,442 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 493 flow [2024-06-20 17:28:46,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-06-20 17:28:46,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-20 17:28:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 493 flow [2024-06-20 17:28:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:46,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:46,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:46,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:28:46,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:46,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash -432105655, now seen corresponding path program 2 times [2024-06-20 17:28:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:46,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494945767] [2024-06-20 17:28:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:47,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:47,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494945767] [2024-06-20 17:28:47,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494945767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:47,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:47,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795903300] [2024-06-20 17:28:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:47,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:47,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:47,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:47,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:47,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:47,742 INFO L124 PetriNetUnfolderBase]: 1444/2201 cut-off events. [2024-06-20 17:28:47,742 INFO L125 PetriNetUnfolderBase]: For 10103/10103 co-relation queries the response was YES. [2024-06-20 17:28:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8583 conditions, 2201 events. 1444/2201 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10689 event pairs, 514 based on Foata normal form. 6/2206 useless extension candidates. Maximal degree in co-relation 8557. Up to 1979 conditions per place. [2024-06-20 17:28:47,756 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 42 changer transitions 0/109 dead transitions. [2024-06-20 17:28:47,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 881 flow [2024-06-20 17:28:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:47,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-20 17:28:47,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-20 17:28:47,758 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 493 flow. Second operand 7 states and 134 transitions. [2024-06-20 17:28:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 881 flow [2024-06-20 17:28:47,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 109 transitions, 855 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 17:28:47,766 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 628 flow [2024-06-20 17:28:47,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2024-06-20 17:28:47,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 17:28:47,767 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 628 flow [2024-06-20 17:28:47,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:28:47,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:47,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -729238459, now seen corresponding path program 3 times [2024-06-20 17:28:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:47,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415014578] [2024-06-20 17:28:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:47,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:48,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:48,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415014578] [2024-06-20 17:28:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415014578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:48,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140475676] [2024-06-20 17:28:48,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:48,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:48,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:48,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:48,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:48,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:48,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:48,855 INFO L124 PetriNetUnfolderBase]: 1480/2248 cut-off events. [2024-06-20 17:28:48,856 INFO L125 PetriNetUnfolderBase]: For 12383/12383 co-relation queries the response was YES. [2024-06-20 17:28:48,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9274 conditions, 2248 events. 1480/2248 cut-off events. For 12383/12383 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10883 event pairs, 510 based on Foata normal form. 6/2253 useless extension candidates. Maximal degree in co-relation 9246. Up to 2011 conditions per place. [2024-06-20 17:28:48,868 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 49 changer transitions 0/112 dead transitions. [2024-06-20 17:28:48,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 1032 flow [2024-06-20 17:28:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:28:48,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 17:28:48,870 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 628 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:28:48,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 1032 flow [2024-06-20 17:28:48,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:48,882 INFO L231 Difference]: Finished difference. Result has 72 places, 87 transitions, 711 flow [2024-06-20 17:28:48,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=72, PETRI_TRANSITIONS=87} [2024-06-20 17:28:48,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-20 17:28:48,883 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 87 transitions, 711 flow [2024-06-20 17:28:48,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:48,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:48,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:48,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:28:48,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:48,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:48,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1948553089, now seen corresponding path program 4 times [2024-06-20 17:28:48,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:48,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918351296] [2024-06-20 17:28:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:48,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:49,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:49,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918351296] [2024-06-20 17:28:49,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918351296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:49,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:49,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:49,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816894335] [2024-06-20 17:28:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:49,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:49,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:49,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 87 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:49,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:49,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:49,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:50,119 INFO L124 PetriNetUnfolderBase]: 1464/2228 cut-off events. [2024-06-20 17:28:50,119 INFO L125 PetriNetUnfolderBase]: For 12404/12404 co-relation queries the response was YES. [2024-06-20 17:28:50,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 2228 events. 1464/2228 cut-off events. For 12404/12404 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10759 event pairs, 513 based on Foata normal form. 6/2233 useless extension candidates. Maximal degree in co-relation 9060. Up to 1998 conditions per place. [2024-06-20 17:28:50,129 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 47 changer transitions 0/110 dead transitions. [2024-06-20 17:28:50,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 995 flow [2024-06-20 17:28:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 17:28:50,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-20 17:28:50,131 INFO L175 Difference]: Start difference. First operand has 72 places, 87 transitions, 711 flow. Second operand 7 states and 129 transitions. [2024-06-20 17:28:50,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 995 flow [2024-06-20 17:28:50,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 862 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:50,141 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 683 flow [2024-06-20 17:28:50,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=683, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-20 17:28:50,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 17:28:50,142 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 683 flow [2024-06-20 17:28:50,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:50,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:50,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:50,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:28:50,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:50,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:50,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1948276259, now seen corresponding path program 1 times [2024-06-20 17:28:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584293946] [2024-06-20 17:28:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:51,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:51,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584293946] [2024-06-20 17:28:51,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584293946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:51,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:51,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:51,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726340769] [2024-06-20 17:28:51,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:51,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:51,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:51,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:51,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:28:51,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:51,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:51,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:51,638 INFO L124 PetriNetUnfolderBase]: 1456/2219 cut-off events. [2024-06-20 17:28:51,639 INFO L125 PetriNetUnfolderBase]: For 13686/13686 co-relation queries the response was YES. [2024-06-20 17:28:51,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 2219 events. 1456/2219 cut-off events. For 13686/13686 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10658 event pairs, 519 based on Foata normal form. 4/2223 useless extension candidates. Maximal degree in co-relation 9072. Up to 2123 conditions per place. [2024-06-20 17:28:51,650 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 92 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-20 17:28:51,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 110 transitions, 979 flow [2024-06-20 17:28:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:28:51,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:28:51,652 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 683 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:28:51,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 110 transitions, 979 flow [2024-06-20 17:28:51,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 845 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:28:51,664 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 610 flow [2024-06-20 17:28:51,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=610, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-20 17:28:51,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 17:28:51,664 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 610 flow [2024-06-20 17:28:51,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:28:51,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:51,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:51,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:28:51,665 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:51,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash -555715092, now seen corresponding path program 1 times [2024-06-20 17:28:51,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:51,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92068856] [2024-06-20 17:28:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:52,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:52,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92068856] [2024-06-20 17:28:52,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92068856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:52,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:52,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:28:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775233976] [2024-06-20 17:28:52,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:52,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:28:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:28:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:28:52,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:52,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:52,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:52,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:52,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:52,551 INFO L124 PetriNetUnfolderBase]: 1323/2086 cut-off events. [2024-06-20 17:28:52,551 INFO L125 PetriNetUnfolderBase]: For 14238/14238 co-relation queries the response was YES. [2024-06-20 17:28:52,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8589 conditions, 2086 events. 1323/2086 cut-off events. For 14238/14238 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10220 event pairs, 556 based on Foata normal form. 1/2087 useless extension candidates. Maximal degree in co-relation 8559. Up to 1959 conditions per place. [2024-06-20 17:28:52,564 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-06-20 17:28:52,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 814 flow [2024-06-20 17:28:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:28:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:28:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-20 17:28:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:28:52,565 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 610 flow. Second operand 5 states and 90 transitions. [2024-06-20 17:28:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 814 flow [2024-06-20 17:28:52,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 771 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:52,575 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 615 flow [2024-06-20 17:28:52,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=615, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2024-06-20 17:28:52,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 17:28:52,576 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 615 flow [2024-06-20 17:28:52,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:52,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:52,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:52,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:28:52,577 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:52,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:52,577 INFO L85 PathProgramCache]: Analyzing trace with hash -510557147, now seen corresponding path program 1 times [2024-06-20 17:28:52,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:52,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872624216] [2024-06-20 17:28:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:52,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:53,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872624216] [2024-06-20 17:28:53,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872624216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:53,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943660389] [2024-06-20 17:28:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:53,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:53,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:53,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:53,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:53,677 INFO L124 PetriNetUnfolderBase]: 1464/2238 cut-off events. [2024-06-20 17:28:53,677 INFO L125 PetriNetUnfolderBase]: For 16613/16613 co-relation queries the response was YES. [2024-06-20 17:28:53,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 2238 events. 1464/2238 cut-off events. For 16613/16613 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10838 event pairs, 529 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 9588. Up to 2130 conditions per place. [2024-06-20 17:28:53,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2024-06-20 17:28:53,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 953 flow [2024-06-20 17:28:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 17:28:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 17:28:53,690 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 615 flow. Second operand 7 states and 128 transitions. [2024-06-20 17:28:53,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 953 flow [2024-06-20 17:28:53,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 927 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:53,703 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 665 flow [2024-06-20 17:28:53,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-20 17:28:53,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-20 17:28:53,703 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 665 flow [2024-06-20 17:28:53,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:53,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:53,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:53,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:28:53,704 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:53,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash -510379517, now seen corresponding path program 2 times [2024-06-20 17:28:53,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:53,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992625040] [2024-06-20 17:28:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:53,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992625040] [2024-06-20 17:28:54,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992625040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:54,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:54,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058949191] [2024-06-20 17:28:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:54,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:54,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 665 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:54,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:54,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:54,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:54,866 INFO L124 PetriNetUnfolderBase]: 1475/2258 cut-off events. [2024-06-20 17:28:54,866 INFO L125 PetriNetUnfolderBase]: For 19490/19492 co-relation queries the response was YES. [2024-06-20 17:28:54,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10206 conditions, 2258 events. 1475/2258 cut-off events. For 19490/19492 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11003 event pairs, 523 based on Foata normal form. 4/2262 useless extension candidates. Maximal degree in co-relation 10174. Up to 2075 conditions per place. [2024-06-20 17:28:54,878 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-20 17:28:54,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1111 flow [2024-06-20 17:28:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 17:28:54,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-20 17:28:54,880 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 665 flow. Second operand 7 states and 131 transitions. [2024-06-20 17:28:54,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1111 flow [2024-06-20 17:28:54,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1059 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 17:28:54,895 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 765 flow [2024-06-20 17:28:54,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=765, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-06-20 17:28:54,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 17:28:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 765 flow [2024-06-20 17:28:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:54,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:54,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:54,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:28:54,897 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:54,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -808665077, now seen corresponding path program 3 times [2024-06-20 17:28:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:54,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067917351] [2024-06-20 17:28:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067917351] [2024-06-20 17:28:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067917351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:55,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:55,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:28:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021872412] [2024-06-20 17:28:55,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:28:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:28:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:28:55,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:55,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:55,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:55,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:55,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:56,055 INFO L124 PetriNetUnfolderBase]: 1470/2242 cut-off events. [2024-06-20 17:28:56,056 INFO L125 PetriNetUnfolderBase]: For 22776/22776 co-relation queries the response was YES. [2024-06-20 17:28:56,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10623 conditions, 2242 events. 1470/2242 cut-off events. For 22776/22776 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10867 event pairs, 531 based on Foata normal form. 2/2242 useless extension candidates. Maximal degree in co-relation 10590. Up to 2070 conditions per place. [2024-06-20 17:28:56,067 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 33 changer transitions 0/122 dead transitions. [2024-06-20 17:28:56,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1071 flow [2024-06-20 17:28:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:28:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:28:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 17:28:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:28:56,069 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 765 flow. Second operand 7 states and 126 transitions. [2024-06-20 17:28:56,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1071 flow [2024-06-20 17:28:56,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1003 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 17:28:56,089 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 772 flow [2024-06-20 17:28:56,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-20 17:28:56,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-20 17:28:56,090 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 772 flow [2024-06-20 17:28:56,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:56,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:56,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:56,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:28:56,091 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)] === [2024-06-20 17:28:56,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:56,091 INFO L85 PathProgramCache]: Analyzing trace with hash -47297489, now seen corresponding path program 1 times [2024-06-20 17:28:56,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:56,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651119160] [2024-06-20 17:28:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:56,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:56,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651119160] [2024-06-20 17:28:56,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651119160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:56,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:56,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:28:56,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902811183] [2024-06-20 17:28:56,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:56,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:28:56,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:28:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:28:56,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:28:56,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 772 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:56,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:56,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:28:56,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:57,052 INFO L124 PetriNetUnfolderBase]: 1342/2123 cut-off events. [2024-06-20 17:28:57,052 INFO L125 PetriNetUnfolderBase]: For 24687/24692 co-relation queries the response was YES. [2024-06-20 17:28:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10218 conditions, 2123 events. 1342/2123 cut-off events. For 24687/24692 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10527 event pairs, 527 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 10183. Up to 1934 conditions per place. [2024-06-20 17:28:57,066 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-20 17:28:57,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 1092 flow [2024-06-20 17:28:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:28:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:28:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 17:28:57,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-20 17:28:57,067 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 772 flow. Second operand 6 states and 109 transitions. [2024-06-20 17:28:57,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 1092 flow [2024-06-20 17:28:57,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 1006 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:28:57,087 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 813 flow [2024-06-20 17:28:57,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=813, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2024-06-20 17:28:57,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-20 17:28:57,088 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 813 flow [2024-06-20 17:28:57,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:28:57,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:57,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:57,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:28:57,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1205762398, now seen corresponding path program 1 times [2024-06-20 17:28:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:57,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231692517] [2024-06-20 17:28:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:57,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:57,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231692517] [2024-06-20 17:28:57,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231692517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:57,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:57,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793039070] [2024-06-20 17:28:57,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:57,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:57,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:28:57,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:57,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:57,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:58,362 INFO L124 PetriNetUnfolderBase]: 1585/2437 cut-off events. [2024-06-20 17:28:58,363 INFO L125 PetriNetUnfolderBase]: For 30405/30405 co-relation queries the response was YES. [2024-06-20 17:28:58,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 2437 events. 1585/2437 cut-off events. For 30405/30405 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12004 event pairs, 521 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 12301. Up to 2234 conditions per place. [2024-06-20 17:28:58,376 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 132 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-20 17:28:58,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 173 transitions, 1548 flow [2024-06-20 17:28:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:28:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:28:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-20 17:28:58,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-20 17:28:58,381 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 813 flow. Second operand 11 states and 199 transitions. [2024-06-20 17:28:58,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 173 transitions, 1548 flow [2024-06-20 17:28:58,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 173 transitions, 1507 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-20 17:28:58,411 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1060 flow [2024-06-20 17:28:58,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1060, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2024-06-20 17:28:58,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-20 17:28:58,412 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1060 flow [2024-06-20 17:28:58,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:28:58,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:58,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:28:58,413 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)] === [2024-06-20 17:28:58,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1010165820, now seen corresponding path program 2 times [2024-06-20 17:28:58,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:58,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223783363] [2024-06-20 17:28:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:28:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:28:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:28:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223783363] [2024-06-20 17:28:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223783363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:28:59,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:28:59,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:28:59,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645906021] [2024-06-20 17:28:59,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:28:59,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:28:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:28:59,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:28:59,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:28:59,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:28:59,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1060 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:28:59,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:28:59,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:28:59,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:28:59,666 INFO L124 PetriNetUnfolderBase]: 1569/2413 cut-off events. [2024-06-20 17:28:59,666 INFO L125 PetriNetUnfolderBase]: For 34284/34284 co-relation queries the response was YES. [2024-06-20 17:28:59,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 2413 events. 1569/2413 cut-off events. For 34284/34284 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11902 event pairs, 520 based on Foata normal form. 6/2419 useless extension candidates. Maximal degree in co-relation 12779. Up to 2221 conditions per place. [2024-06-20 17:28:59,680 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-06-20 17:28:59,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1487 flow [2024-06-20 17:28:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:28:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:28:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:28:59,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:28:59,682 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1060 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:28:59,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1487 flow [2024-06-20 17:28:59,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1378 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-20 17:28:59,704 INFO L231 Difference]: Finished difference. Result has 102 places, 129 transitions, 1036 flow [2024-06-20 17:28:59,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1036, PETRI_PLACES=102, PETRI_TRANSITIONS=129} [2024-06-20 17:28:59,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-20 17:28:59,705 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 129 transitions, 1036 flow [2024-06-20 17:28:59,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:28:59,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:28:59,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:28:59,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:28:59,705 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:28:59,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:28:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -862348830, now seen corresponding path program 3 times [2024-06-20 17:28:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:28:59,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905074203] [2024-06-20 17:28:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:28:59,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:28:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:00,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:00,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905074203] [2024-06-20 17:29:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905074203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:00,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:00,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910034601] [2024-06-20 17:29:00,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:00,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:00,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:00,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:00,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 129 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:00,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:00,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:00,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:01,048 INFO L124 PetriNetUnfolderBase]: 1623/2499 cut-off events. [2024-06-20 17:29:01,049 INFO L125 PetriNetUnfolderBase]: For 37839/37839 co-relation queries the response was YES. [2024-06-20 17:29:01,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13497 conditions, 2499 events. 1623/2499 cut-off events. For 37839/37839 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12481 event pairs, 461 based on Foata normal form. 4/2502 useless extension candidates. Maximal degree in co-relation 13453. Up to 1989 conditions per place. [2024-06-20 17:29:01,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 74 changer transitions 0/174 dead transitions. [2024-06-20 17:29:01,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 1773 flow [2024-06-20 17:29:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:29:01,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:29:01,067 INFO L175 Difference]: Start difference. First operand has 102 places, 129 transitions, 1036 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:29:01,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 1773 flow [2024-06-20 17:29:01,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1684 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:01,105 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1251 flow [2024-06-20 17:29:01,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1251, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-20 17:29:01,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-20 17:29:01,106 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1251 flow [2024-06-20 17:29:01,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:01,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:01,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:01,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:29:01,106 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:01,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1358104970, now seen corresponding path program 4 times [2024-06-20 17:29:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:01,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274089056] [2024-06-20 17:29:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:01,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:02,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:02,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274089056] [2024-06-20 17:29:02,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274089056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:02,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:02,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:02,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354828058] [2024-06-20 17:29:02,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:02,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:02,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:02,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:02,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1251 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:02,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:02,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:02,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:02,729 INFO L124 PetriNetUnfolderBase]: 1613/2489 cut-off events. [2024-06-20 17:29:02,729 INFO L125 PetriNetUnfolderBase]: For 38972/38972 co-relation queries the response was YES. [2024-06-20 17:29:02,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13748 conditions, 2489 events. 1613/2489 cut-off events. For 38972/38972 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12402 event pairs, 478 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 13704. Up to 1981 conditions per place. [2024-06-20 17:29:02,743 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 73 changer transitions 0/171 dead transitions. [2024-06-20 17:29:02,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 171 transitions, 1769 flow [2024-06-20 17:29:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-20 17:29:02,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 17:29:02,745 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1251 flow. Second operand 8 states and 156 transitions. [2024-06-20 17:29:02,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 171 transitions, 1769 flow [2024-06-20 17:29:02,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 171 transitions, 1667 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:02,781 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1303 flow [2024-06-20 17:29:02,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1303, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-20 17:29:02,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 17:29:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1303 flow [2024-06-20 17:29:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:02,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:02,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:29:02,783 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)] === [2024-06-20 17:29:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:02,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1571248508, now seen corresponding path program 1 times [2024-06-20 17:29:02,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:02,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630621204] [2024-06-20 17:29:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:03,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:03,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630621204] [2024-06-20 17:29:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630621204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:03,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936010386] [2024-06-20 17:29:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:03,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:03,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:03,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:03,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1303 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:03,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:03,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:03,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:04,347 INFO L124 PetriNetUnfolderBase]: 1630/2514 cut-off events. [2024-06-20 17:29:04,347 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-20 17:29:04,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13974 conditions, 2514 events. 1630/2514 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12540 event pairs, 485 based on Foata normal form. 4/2517 useless extension candidates. Maximal degree in co-relation 13928. Up to 2216 conditions per place. [2024-06-20 17:29:04,360 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-20 17:29:04,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1783 flow [2024-06-20 17:29:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:29:04,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 17:29:04,362 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1303 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:29:04,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1783 flow [2024-06-20 17:29:04,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 171 transitions, 1633 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:04,391 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1296 flow [2024-06-20 17:29:04,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1296, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-20 17:29:04,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 17:29:04,391 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1296 flow [2024-06-20 17:29:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:04,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:04,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:04,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:29:04,392 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:04,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1625009217, now seen corresponding path program 1 times [2024-06-20 17:29:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93961801] [2024-06-20 17:29:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:04,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93961801] [2024-06-20 17:29:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93961801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:04,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122385331] [2024-06-20 17:29:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:04,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:04,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:05,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:05,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:05,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:05,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:05,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:05,423 INFO L124 PetriNetUnfolderBase]: 1514/2402 cut-off events. [2024-06-20 17:29:05,424 INFO L125 PetriNetUnfolderBase]: For 45019/45029 co-relation queries the response was YES. [2024-06-20 17:29:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13600 conditions, 2402 events. 1514/2402 cut-off events. For 45019/45029 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12213 event pairs, 511 based on Foata normal form. 2/2386 useless extension candidates. Maximal degree in co-relation 13553. Up to 2171 conditions per place. [2024-06-20 17:29:05,439 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 119 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-20 17:29:05,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 158 transitions, 1658 flow [2024-06-20 17:29:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-20 17:29:05,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:29:05,441 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1296 flow. Second operand 6 states and 110 transitions. [2024-06-20 17:29:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 158 transitions, 1658 flow [2024-06-20 17:29:05,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1537 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:05,484 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1256 flow [2024-06-20 17:29:05,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1256, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-20 17:29:05,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 17:29:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1256 flow [2024-06-20 17:29:05,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:05,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:05,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:05,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:29:05,486 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)] === [2024-06-20 17:29:05,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 46241630, now seen corresponding path program 5 times [2024-06-20 17:29:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972476449] [2024-06-20 17:29:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:06,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:06,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972476449] [2024-06-20 17:29:06,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972476449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:06,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:06,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:06,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999295419] [2024-06-20 17:29:06,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:06,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:06,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:06,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:06,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:06,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:06,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:06,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:06,763 INFO L124 PetriNetUnfolderBase]: 1694/2614 cut-off events. [2024-06-20 17:29:06,763 INFO L125 PetriNetUnfolderBase]: For 50562/50562 co-relation queries the response was YES. [2024-06-20 17:29:06,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14816 conditions, 2614 events. 1694/2614 cut-off events. For 50562/50562 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13192 event pairs, 468 based on Foata normal form. 4/2615 useless extension candidates. Maximal degree in co-relation 14768. Up to 2068 conditions per place. [2024-06-20 17:29:06,781 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 102 selfloop transitions, 76 changer transitions 0/183 dead transitions. [2024-06-20 17:29:06,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 2000 flow [2024-06-20 17:29:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 17:29:06,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 17:29:06,782 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1256 flow. Second operand 8 states and 154 transitions. [2024-06-20 17:29:06,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 2000 flow [2024-06-20 17:29:06,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 1957 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:06,827 INFO L231 Difference]: Finished difference. Result has 114 places, 149 transitions, 1480 flow [2024-06-20 17:29:06,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1480, PETRI_PLACES=114, PETRI_TRANSITIONS=149} [2024-06-20 17:29:06,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-20 17:29:06,828 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 149 transitions, 1480 flow [2024-06-20 17:29:06,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:06,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:06,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:06,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:29:06,829 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)] === [2024-06-20 17:29:06,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash 302742140, now seen corresponding path program 6 times [2024-06-20 17:29:06,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:06,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025852190] [2024-06-20 17:29:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:06,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:07,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:07,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025852190] [2024-06-20 17:29:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025852190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:07,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:07,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675496846] [2024-06-20 17:29:07,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:07,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:07,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 149 transitions, 1480 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:07,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:07,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:07,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:08,218 INFO L124 PetriNetUnfolderBase]: 1684/2596 cut-off events. [2024-06-20 17:29:08,218 INFO L125 PetriNetUnfolderBase]: For 54362/54362 co-relation queries the response was YES. [2024-06-20 17:29:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 2596 events. 1684/2596 cut-off events. For 54362/54362 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13060 event pairs, 461 based on Foata normal form. 4/2597 useless extension candidates. Maximal degree in co-relation 15076. Up to 2060 conditions per place. [2024-06-20 17:29:08,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 81 changer transitions 0/180 dead transitions. [2024-06-20 17:29:08,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 2029 flow [2024-06-20 17:29:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:29:08,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:29:08,236 INFO L175 Difference]: Start difference. First operand has 114 places, 149 transitions, 1480 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:29:08,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 2029 flow [2024-06-20 17:29:08,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 1734 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:08,285 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1356 flow [2024-06-20 17:29:08,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1356, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-20 17:29:08,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-20 17:29:08,286 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1356 flow [2024-06-20 17:29:08,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:08,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:08,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:08,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:29:08,287 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:08,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1686856468, now seen corresponding path program 7 times [2024-06-20 17:29:08,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:08,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430411365] [2024-06-20 17:29:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:08,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430411365] [2024-06-20 17:29:08,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430411365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:08,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:08,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:08,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541248262] [2024-06-20 17:29:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:08,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:09,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:09,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1356 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:09,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:09,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:09,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:09,680 INFO L124 PetriNetUnfolderBase]: 1674/2588 cut-off events. [2024-06-20 17:29:09,681 INFO L125 PetriNetUnfolderBase]: For 55098/55098 co-relation queries the response was YES. [2024-06-20 17:29:09,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14834 conditions, 2588 events. 1674/2588 cut-off events. For 55098/55098 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13048 event pairs, 472 based on Foata normal form. 4/2589 useless extension candidates. Maximal degree in co-relation 14785. Up to 2052 conditions per place. [2024-06-20 17:29:09,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 79 changer transitions 0/177 dead transitions. [2024-06-20 17:29:09,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1804 flow [2024-06-20 17:29:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:29:09,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:29:09,709 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1356 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:29:09,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1804 flow [2024-06-20 17:29:09,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1602 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:09,762 INFO L231 Difference]: Finished difference. Result has 116 places, 149 transitions, 1320 flow [2024-06-20 17:29:09,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=116, PETRI_TRANSITIONS=149} [2024-06-20 17:29:09,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-20 17:29:09,763 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 149 transitions, 1320 flow [2024-06-20 17:29:09,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:09,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:09,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:09,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:29:09,764 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:09,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1654426796, now seen corresponding path program 2 times [2024-06-20 17:29:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641632054] [2024-06-20 17:29:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:09,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:10,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:10,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:10,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641632054] [2024-06-20 17:29:10,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641632054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:10,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:10,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:10,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089383822] [2024-06-20 17:29:10,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:10,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:10,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:10,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:10,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:10,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:10,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 149 transitions, 1320 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:10,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:10,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:11,205 INFO L124 PetriNetUnfolderBase]: 1691/2624 cut-off events. [2024-06-20 17:29:11,206 INFO L125 PetriNetUnfolderBase]: For 59036/59036 co-relation queries the response was YES. [2024-06-20 17:29:11,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 2624 events. 1691/2624 cut-off events. For 59036/59036 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13321 event pairs, 479 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 15037. Up to 2312 conditions per place. [2024-06-20 17:29:11,225 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 123 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-06-20 17:29:11,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1810 flow [2024-06-20 17:29:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:29:11,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 17:29:11,227 INFO L175 Difference]: Start difference. First operand has 116 places, 149 transitions, 1320 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:29:11,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1810 flow [2024-06-20 17:29:11,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 1641 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:11,273 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1299 flow [2024-06-20 17:29:11,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-20 17:29:11,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-20 17:29:11,274 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1299 flow [2024-06-20 17:29:11,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:11,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:11,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:11,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:29:11,275 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:11,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 197297010, now seen corresponding path program 3 times [2024-06-20 17:29:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575968109] [2024-06-20 17:29:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:12,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:12,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575968109] [2024-06-20 17:29:12,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575968109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:12,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:12,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517534181] [2024-06-20 17:29:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:12,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:12,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:12,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1299 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:12,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:12,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:12,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:12,718 INFO L124 PetriNetUnfolderBase]: 1708/2651 cut-off events. [2024-06-20 17:29:12,719 INFO L125 PetriNetUnfolderBase]: For 63973/63973 co-relation queries the response was YES. [2024-06-20 17:29:12,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15444 conditions, 2651 events. 1708/2651 cut-off events. For 63973/63973 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13526 event pairs, 452 based on Foata normal form. 4/2654 useless extension candidates. Maximal degree in co-relation 15393. Up to 2245 conditions per place. [2024-06-20 17:29:12,736 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/185 dead transitions. [2024-06-20 17:29:12,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 185 transitions, 1943 flow [2024-06-20 17:29:12,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:29:12,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:29:12,738 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1299 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:29:12,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 185 transitions, 1943 flow [2024-06-20 17:29:12,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1815 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:12,788 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1374 flow [2024-06-20 17:29:12,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1374, PETRI_PLACES=119, PETRI_TRANSITIONS=155} [2024-06-20 17:29:12,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 17:29:12,790 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1374 flow [2024-06-20 17:29:12,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:12,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:12,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:12,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:29:12,790 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)] === [2024-06-20 17:29:12,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:12,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1565628872, now seen corresponding path program 4 times [2024-06-20 17:29:12,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:12,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729891985] [2024-06-20 17:29:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:12,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:13,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:13,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729891985] [2024-06-20 17:29:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729891985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:13,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:13,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137353005] [2024-06-20 17:29:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:13,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:13,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 155 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:13,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:13,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:13,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:14,406 INFO L124 PetriNetUnfolderBase]: 1700/2641 cut-off events. [2024-06-20 17:29:14,407 INFO L125 PetriNetUnfolderBase]: For 67754/67754 co-relation queries the response was YES. [2024-06-20 17:29:14,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15580 conditions, 2641 events. 1700/2641 cut-off events. For 67754/67754 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13435 event pairs, 483 based on Foata normal form. 4/2644 useless extension candidates. Maximal degree in co-relation 15528. Up to 2327 conditions per place. [2024-06-20 17:29:14,459 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 49 changer transitions 0/183 dead transitions. [2024-06-20 17:29:14,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 1832 flow [2024-06-20 17:29:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:29:14,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:29:14,472 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1374 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:29:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 1832 flow [2024-06-20 17:29:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 183 transitions, 1718 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:14,539 INFO L231 Difference]: Finished difference. Result has 123 places, 155 transitions, 1366 flow [2024-06-20 17:29:14,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=123, PETRI_TRANSITIONS=155} [2024-06-20 17:29:14,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 17:29:14,542 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 155 transitions, 1366 flow [2024-06-20 17:29:14,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:14,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:14,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:29:14,542 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:14,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1637389377, now seen corresponding path program 2 times [2024-06-20 17:29:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872175842] [2024-06-20 17:29:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:15,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872175842] [2024-06-20 17:29:15,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872175842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:15,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:15,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:15,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679612972] [2024-06-20 17:29:15,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:15,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:15,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:15,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:15,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:15,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 155 transitions, 1366 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:15,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:15,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:15,591 INFO L124 PetriNetUnfolderBase]: 1540/2455 cut-off events. [2024-06-20 17:29:15,591 INFO L125 PetriNetUnfolderBase]: For 68727/68739 co-relation queries the response was YES. [2024-06-20 17:29:15,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14526 conditions, 2455 events. 1540/2455 cut-off events. For 68727/68739 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12632 event pairs, 515 based on Foata normal form. 5/2438 useless extension candidates. Maximal degree in co-relation 14472. Up to 2192 conditions per place. [2024-06-20 17:29:15,608 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-06-20 17:29:15,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 165 transitions, 1686 flow [2024-06-20 17:29:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-20 17:29:15,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:29:15,609 INFO L175 Difference]: Start difference. First operand has 123 places, 155 transitions, 1366 flow. Second operand 6 states and 108 transitions. [2024-06-20 17:29:15,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 165 transitions, 1686 flow [2024-06-20 17:29:15,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 165 transitions, 1556 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:15,693 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1296 flow [2024-06-20 17:29:15,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1296, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-20 17:29:15,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-20 17:29:15,694 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1296 flow [2024-06-20 17:29:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:15,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:15,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:15,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:29:15,694 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:15,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1631682401, now seen corresponding path program 1 times [2024-06-20 17:29:15,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:15,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315540291] [2024-06-20 17:29:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:16,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315540291] [2024-06-20 17:29:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315540291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:16,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:16,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33670008] [2024-06-20 17:29:16,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:16,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:16,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:16,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:16,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:16,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 17:29:16,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:16,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:16,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:16,737 INFO L124 PetriNetUnfolderBase]: 1689/2630 cut-off events. [2024-06-20 17:29:16,737 INFO L125 PetriNetUnfolderBase]: For 72420/72420 co-relation queries the response was YES. [2024-06-20 17:29:16,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15572 conditions, 2630 events. 1689/2630 cut-off events. For 72420/72420 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13370 event pairs, 542 based on Foata normal form. 1/2631 useless extension candidates. Maximal degree in co-relation 15517. Up to 2503 conditions per place. [2024-06-20 17:29:16,755 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 154 selfloop transitions, 11 changer transitions 0/170 dead transitions. [2024-06-20 17:29:16,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1702 flow [2024-06-20 17:29:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 17:29:16,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:29:16,756 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1296 flow. Second operand 6 states and 102 transitions. [2024-06-20 17:29:16,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1702 flow [2024-06-20 17:29:16,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 170 transitions, 1631 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:16,834 INFO L231 Difference]: Finished difference. Result has 123 places, 158 transitions, 1289 flow [2024-06-20 17:29:16,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1289, PETRI_PLACES=123, PETRI_TRANSITIONS=158} [2024-06-20 17:29:16,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-20 17:29:16,834 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 158 transitions, 1289 flow [2024-06-20 17:29:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 17:29:16,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:16,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:16,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:29:16,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:16,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1637396321, now seen corresponding path program 2 times [2024-06-20 17:29:16,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:16,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746099061] [2024-06-20 17:29:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:16,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:17,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746099061] [2024-06-20 17:29:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746099061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:17,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:17,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:29:17,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105729681] [2024-06-20 17:29:17,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:17,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:29:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:29:17,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:29:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:17,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 158 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 17:29:17,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:17,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:17,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:17,794 INFO L124 PetriNetUnfolderBase]: 1686/2627 cut-off events. [2024-06-20 17:29:17,794 INFO L125 PetriNetUnfolderBase]: For 76166/76168 co-relation queries the response was YES. [2024-06-20 17:29:17,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15840 conditions, 2627 events. 1686/2627 cut-off events. For 76166/76168 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13388 event pairs, 546 based on Foata normal form. 3/2630 useless extension candidates. Maximal degree in co-relation 15784. Up to 2493 conditions per place. [2024-06-20 17:29:17,812 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-20 17:29:17,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 170 transitions, 1687 flow [2024-06-20 17:29:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:29:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:29:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 17:29:17,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-20 17:29:17,813 INFO L175 Difference]: Start difference. First operand has 123 places, 158 transitions, 1289 flow. Second operand 6 states and 101 transitions. [2024-06-20 17:29:17,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 170 transitions, 1687 flow [2024-06-20 17:29:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 170 transitions, 1645 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:17,885 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1327 flow [2024-06-20 17:29:17,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1327, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-20 17:29:17,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 17:29:17,885 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1327 flow [2024-06-20 17:29:17,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-20 17:29:17,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:17,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:29:17,886 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1466220949, now seen corresponding path program 1 times [2024-06-20 17:29:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942016256] [2024-06-20 17:29:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:18,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942016256] [2024-06-20 17:29:18,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942016256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:18,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:18,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587267481] [2024-06-20 17:29:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:18,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:18,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:18,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:18,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:18,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:19,171 INFO L124 PetriNetUnfolderBase]: 1560/2483 cut-off events. [2024-06-20 17:29:19,171 INFO L125 PetriNetUnfolderBase]: For 79373/79385 co-relation queries the response was YES. [2024-06-20 17:29:19,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 2483 events. 1560/2483 cut-off events. For 79373/79385 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12785 event pairs, 512 based on Foata normal form. 4/2465 useless extension candidates. Maximal degree in co-relation 15285. Up to 2189 conditions per place. [2024-06-20 17:29:19,189 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-20 17:29:19,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 176 transitions, 1715 flow [2024-06-20 17:29:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:29:19,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:29:19,191 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1327 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:29:19,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 176 transitions, 1715 flow [2024-06-20 17:29:19,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 1657 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:19,272 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1390 flow [2024-06-20 17:29:19,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1390, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2024-06-20 17:29:19,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-20 17:29:19,273 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1390 flow [2024-06-20 17:29:19,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:19,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:19,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:19,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:29:19,273 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)] === [2024-06-20 17:29:19,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:19,274 INFO L85 PathProgramCache]: Analyzing trace with hash -572851680, now seen corresponding path program 1 times [2024-06-20 17:29:19,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:19,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43950491] [2024-06-20 17:29:19,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:19,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43950491] [2024-06-20 17:29:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43950491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:19,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:19,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301491168] [2024-06-20 17:29:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:19,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:20,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:20,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 1390 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:20,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:20,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:20,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:20,632 INFO L124 PetriNetUnfolderBase]: 1735/2705 cut-off events. [2024-06-20 17:29:20,633 INFO L125 PetriNetUnfolderBase]: For 87783/87783 co-relation queries the response was YES. [2024-06-20 17:29:20,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 2705 events. 1735/2705 cut-off events. For 87783/87783 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13858 event pairs, 366 based on Foata normal form. 4/2709 useless extension candidates. Maximal degree in co-relation 17274. Up to 2430 conditions per place. [2024-06-20 17:29:20,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 31 changer transitions 0/206 dead transitions. [2024-06-20 17:29:20,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 206 transitions, 2129 flow [2024-06-20 17:29:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:29:20,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:29:20,655 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1390 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:29:20,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 206 transitions, 2129 flow [2024-06-20 17:29:20,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 206 transitions, 2036 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:20,733 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1458 flow [2024-06-20 17:29:20,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1458, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-20 17:29:20,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-20 17:29:20,734 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1458 flow [2024-06-20 17:29:20,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:20,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:20,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:20,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:29:20,735 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:20,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1129353310, now seen corresponding path program 2 times [2024-06-20 17:29:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:20,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916959327] [2024-06-20 17:29:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:21,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:21,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916959327] [2024-06-20 17:29:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916959327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:21,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:21,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797802] [2024-06-20 17:29:21,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:21,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:21,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:21,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:21,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:21,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:21,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1458 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:21,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:21,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:21,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:22,074 INFO L124 PetriNetUnfolderBase]: 1727/2693 cut-off events. [2024-06-20 17:29:22,074 INFO L125 PetriNetUnfolderBase]: For 91962/91962 co-relation queries the response was YES. [2024-06-20 17:29:22,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17429 conditions, 2693 events. 1727/2693 cut-off events. For 91962/91962 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13752 event pairs, 487 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17370. Up to 2483 conditions per place. [2024-06-20 17:29:22,094 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 27 changer transitions 0/199 dead transitions. [2024-06-20 17:29:22,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 199 transitions, 1963 flow [2024-06-20 17:29:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:29:22,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:29:22,096 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1458 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:29:22,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 199 transitions, 1963 flow [2024-06-20 17:29:22,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 199 transitions, 1854 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:22,186 INFO L231 Difference]: Finished difference. Result has 135 places, 169 transitions, 1412 flow [2024-06-20 17:29:22,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=169} [2024-06-20 17:29:22,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-20 17:29:22,187 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 169 transitions, 1412 flow [2024-06-20 17:29:22,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:22,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:22,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:22,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:29:22,187 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:22,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1014062140, now seen corresponding path program 3 times [2024-06-20 17:29:22,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:22,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173497933] [2024-06-20 17:29:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:22,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:22,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:22,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173497933] [2024-06-20 17:29:22,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173497933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:22,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:22,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:22,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373583446] [2024-06-20 17:29:22,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:22,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:22,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:22,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:22,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:22,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:22,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 169 transitions, 1412 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:22,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:22,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:22,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:23,500 INFO L124 PetriNetUnfolderBase]: 1744/2717 cut-off events. [2024-06-20 17:29:23,500 INFO L125 PetriNetUnfolderBase]: For 97981/97983 co-relation queries the response was YES. [2024-06-20 17:29:23,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17659 conditions, 2717 events. 1744/2717 cut-off events. For 97981/97983 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13900 event pairs, 478 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 17598. Up to 2449 conditions per place. [2024-06-20 17:29:23,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-06-20 17:29:23,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 1967 flow [2024-06-20 17:29:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:29:23,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:29:23,518 INFO L175 Difference]: Start difference. First operand has 135 places, 169 transitions, 1412 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:29:23,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 1967 flow [2024-06-20 17:29:23,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 200 transitions, 1907 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:23,626 INFO L231 Difference]: Finished difference. Result has 136 places, 171 transitions, 1499 flow [2024-06-20 17:29:23,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1499, PETRI_PLACES=136, PETRI_TRANSITIONS=171} [2024-06-20 17:29:23,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 17:29:23,626 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 171 transitions, 1499 flow [2024-06-20 17:29:23,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:23,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:23,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:23,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:29:23,627 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:23,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -165771132, now seen corresponding path program 4 times [2024-06-20 17:29:23,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:23,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642056342] [2024-06-20 17:29:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:23,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:24,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:24,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642056342] [2024-06-20 17:29:24,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642056342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:24,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:24,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:24,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081400653] [2024-06-20 17:29:24,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:24,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:24,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:24,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:24,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:24,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 171 transitions, 1499 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:25,001 INFO L124 PetriNetUnfolderBase]: 1736/2696 cut-off events. [2024-06-20 17:29:25,001 INFO L125 PetriNetUnfolderBase]: For 102141/102141 co-relation queries the response was YES. [2024-06-20 17:29:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2696 events. 1736/2696 cut-off events. For 102141/102141 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13703 event pairs, 480 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17724. Up to 2437 conditions per place. [2024-06-20 17:29:25,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 43 changer transitions 0/200 dead transitions. [2024-06-20 17:29:25,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 200 transitions, 2050 flow [2024-06-20 17:29:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:25,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:29:25,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 17:29:25,022 INFO L175 Difference]: Start difference. First operand has 136 places, 171 transitions, 1499 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:29:25,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 200 transitions, 2050 flow [2024-06-20 17:29:25,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 200 transitions, 1921 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:25,127 INFO L231 Difference]: Finished difference. Result has 138 places, 173 transitions, 1519 flow [2024-06-20 17:29:25,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=138, PETRI_TRANSITIONS=173} [2024-06-20 17:29:25,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-20 17:29:25,128 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 173 transitions, 1519 flow [2024-06-20 17:29:25,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 17:29:25,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:25,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:29:25,128 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1708796360, now seen corresponding path program 1 times [2024-06-20 17:29:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928095535] [2024-06-20 17:29:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:25,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928095535] [2024-06-20 17:29:25,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928095535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:25,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:25,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827320569] [2024-06-20 17:29:25,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:25,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:25,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:25,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:25,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:25,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:25,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 173 transitions, 1519 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:25,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:25,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:26,208 INFO L124 PetriNetUnfolderBase]: 1746/2718 cut-off events. [2024-06-20 17:29:26,208 INFO L125 PetriNetUnfolderBase]: For 106900/106900 co-relation queries the response was YES. [2024-06-20 17:29:26,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18026 conditions, 2718 events. 1746/2718 cut-off events. For 106900/106900 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13858 event pairs, 475 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 17963. Up to 2571 conditions per place. [2024-06-20 17:29:26,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-20 17:29:26,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 2020 flow [2024-06-20 17:29:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:29:26,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 17:29:26,229 INFO L175 Difference]: Start difference. First operand has 138 places, 173 transitions, 1519 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:29:26,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 2020 flow [2024-06-20 17:29:26,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 196 transitions, 1889 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:26,338 INFO L231 Difference]: Finished difference. Result has 140 places, 179 transitions, 1495 flow [2024-06-20 17:29:26,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=140, PETRI_TRANSITIONS=179} [2024-06-20 17:29:26,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-20 17:29:26,339 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 179 transitions, 1495 flow [2024-06-20 17:29:26,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:26,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:26,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:26,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:29:26,344 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:26,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash -957451942, now seen corresponding path program 1 times [2024-06-20 17:29:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:26,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961794944] [2024-06-20 17:29:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:26,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:27,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961794944] [2024-06-20 17:29:27,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961794944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:27,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:27,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516798259] [2024-06-20 17:29:27,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:27,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:27,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 179 transitions, 1495 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:27,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:27,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:27,680 INFO L124 PetriNetUnfolderBase]: 1774/2740 cut-off events. [2024-06-20 17:29:27,680 INFO L125 PetriNetUnfolderBase]: For 112618/112618 co-relation queries the response was YES. [2024-06-20 17:29:27,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18677 conditions, 2740 events. 1774/2740 cut-off events. For 112618/112618 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13841 event pairs, 464 based on Foata normal form. 2/2741 useless extension candidates. Maximal degree in co-relation 18612. Up to 2555 conditions per place. [2024-06-20 17:29:27,713 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-20 17:29:27,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 203 transitions, 2131 flow [2024-06-20 17:29:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:29:27,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 17:29:27,716 INFO L175 Difference]: Start difference. First operand has 140 places, 179 transitions, 1495 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:29:27,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 203 transitions, 2131 flow [2024-06-20 17:29:27,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 203 transitions, 2081 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:27,810 INFO L231 Difference]: Finished difference. Result has 145 places, 187 transitions, 1652 flow [2024-06-20 17:29:27,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1652, PETRI_PLACES=145, PETRI_TRANSITIONS=187} [2024-06-20 17:29:27,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-20 17:29:27,812 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 187 transitions, 1652 flow [2024-06-20 17:29:27,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:27,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:27,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:27,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:29:27,813 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:27,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1708916330, now seen corresponding path program 2 times [2024-06-20 17:29:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:27,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559414652] [2024-06-20 17:29:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:28,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:28,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559414652] [2024-06-20 17:29:28,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559414652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:28,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:28,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662947492] [2024-06-20 17:29:28,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:28,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:28,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:28,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:28,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 187 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:28,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:28,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:28,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:29,067 INFO L124 PetriNetUnfolderBase]: 1792/2768 cut-off events. [2024-06-20 17:29:29,067 INFO L125 PetriNetUnfolderBase]: For 121814/121814 co-relation queries the response was YES. [2024-06-20 17:29:29,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19533 conditions, 2768 events. 1792/2768 cut-off events. For 121814/121814 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13961 event pairs, 481 based on Foata normal form. 2/2770 useless extension candidates. Maximal degree in co-relation 19466. Up to 2622 conditions per place. [2024-06-20 17:29:29,090 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-20 17:29:29,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 2288 flow [2024-06-20 17:29:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:29:29,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 17:29:29,100 INFO L175 Difference]: Start difference. First operand has 145 places, 187 transitions, 1652 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:29:29,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 2288 flow [2024-06-20 17:29:29,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 209 transitions, 2193 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:29,248 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 1713 flow [2024-06-20 17:29:29,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1713, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-20 17:29:29,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-20 17:29:29,251 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 1713 flow [2024-06-20 17:29:29,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:29,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:29,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:29,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:29:29,252 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:29,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -780083272, now seen corresponding path program 2 times [2024-06-20 17:29:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353745870] [2024-06-20 17:29:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:29,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:29,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353745870] [2024-06-20 17:29:29,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353745870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:29,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:29,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:29,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125286511] [2024-06-20 17:29:29,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:29,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:29,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:29,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:29,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 1713 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:29,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:29,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:29,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:30,331 INFO L124 PetriNetUnfolderBase]: 1810/2792 cut-off events. [2024-06-20 17:29:30,332 INFO L125 PetriNetUnfolderBase]: For 129473/129477 co-relation queries the response was YES. [2024-06-20 17:29:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20104 conditions, 2792 events. 1810/2792 cut-off events. For 129473/129477 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14076 event pairs, 475 based on Foata normal form. 6/2797 useless extension candidates. Maximal degree in co-relation 20035. Up to 2548 conditions per place. [2024-06-20 17:29:30,353 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 53 changer transitions 0/225 dead transitions. [2024-06-20 17:29:30,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 225 transitions, 2587 flow [2024-06-20 17:29:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:29:30,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 17:29:30,355 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 1713 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:29:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 225 transitions, 2587 flow [2024-06-20 17:29:30,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 225 transitions, 2525 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:30,516 INFO L231 Difference]: Finished difference. Result has 155 places, 210 transitions, 2057 flow [2024-06-20 17:29:30,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2057, PETRI_PLACES=155, PETRI_TRANSITIONS=210} [2024-06-20 17:29:30,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-20 17:29:30,517 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 210 transitions, 2057 flow [2024-06-20 17:29:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:30,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:30,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:30,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:29:30,518 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:30,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:30,518 INFO L85 PathProgramCache]: Analyzing trace with hash -780320608, now seen corresponding path program 3 times [2024-06-20 17:29:30,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:30,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964037032] [2024-06-20 17:29:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:30,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:31,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964037032] [2024-06-20 17:29:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964037032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:31,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:31,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495958844] [2024-06-20 17:29:31,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:31,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:31,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 210 transitions, 2057 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:31,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:31,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:31,607 INFO L124 PetriNetUnfolderBase]: 1804/2789 cut-off events. [2024-06-20 17:29:31,607 INFO L125 PetriNetUnfolderBase]: For 137348/137350 co-relation queries the response was YES. [2024-06-20 17:29:31,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20724 conditions, 2789 events. 1804/2789 cut-off events. For 137348/137350 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14144 event pairs, 491 based on Foata normal form. 2/2791 useless extension candidates. Maximal degree in co-relation 20651. Up to 2627 conditions per place. [2024-06-20 17:29:31,631 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 31 changer transitions 0/226 dead transitions. [2024-06-20 17:29:31,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2679 flow [2024-06-20 17:29:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:29:31,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 17:29:31,633 INFO L175 Difference]: Start difference. First operand has 155 places, 210 transitions, 2057 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:29:31,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2679 flow [2024-06-20 17:29:31,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 226 transitions, 2564 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-20 17:29:31,782 INFO L231 Difference]: Finished difference. Result has 160 places, 213 transitions, 2074 flow [2024-06-20 17:29:31,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2074, PETRI_PLACES=160, PETRI_TRANSITIONS=213} [2024-06-20 17:29:31,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-20 17:29:31,784 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 213 transitions, 2074 flow [2024-06-20 17:29:31,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:31,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:31,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:31,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:29:31,789 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:31,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash -780320422, now seen corresponding path program 3 times [2024-06-20 17:29:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:31,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461406630] [2024-06-20 17:29:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:32,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461406630] [2024-06-20 17:29:32,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461406630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:32,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769808813] [2024-06-20 17:29:32,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:32,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:32,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 213 transitions, 2074 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:32,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:32,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:32,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:32,985 INFO L124 PetriNetUnfolderBase]: 1800/2779 cut-off events. [2024-06-20 17:29:32,985 INFO L125 PetriNetUnfolderBase]: For 140263/140267 co-relation queries the response was YES. [2024-06-20 17:29:32,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 2779 events. 1800/2779 cut-off events. For 140263/140267 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14111 event pairs, 474 based on Foata normal form. 6/2784 useless extension candidates. Maximal degree in co-relation 20617. Up to 2538 conditions per place. [2024-06-20 17:29:33,008 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-20 17:29:33,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2762 flow [2024-06-20 17:29:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:29:33,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 17:29:33,010 INFO L175 Difference]: Start difference. First operand has 160 places, 213 transitions, 2074 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:29:33,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2762 flow [2024-06-20 17:29:33,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 230 transitions, 2614 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:33,163 INFO L231 Difference]: Finished difference. Result has 163 places, 217 transitions, 2096 flow [2024-06-20 17:29:33,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2096, PETRI_PLACES=163, PETRI_TRANSITIONS=217} [2024-06-20 17:29:33,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-20 17:29:33,164 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 217 transitions, 2096 flow [2024-06-20 17:29:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:33,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:29:33,165 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:33,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:33,165 INFO L85 PathProgramCache]: Analyzing trace with hash -780074344, now seen corresponding path program 1 times [2024-06-20 17:29:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:33,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010754794] [2024-06-20 17:29:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:33,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010754794] [2024-06-20 17:29:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010754794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:33,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:33,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:29:33,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814674564] [2024-06-20 17:29:33,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:33,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:29:33,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:29:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:29:34,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:29:34,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 217 transitions, 2096 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:34,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:34,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:29:34,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:34,477 INFO L124 PetriNetUnfolderBase]: 1713/2692 cut-off events. [2024-06-20 17:29:34,477 INFO L125 PetriNetUnfolderBase]: For 151924/151941 co-relation queries the response was YES. [2024-06-20 17:29:34,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20026 conditions, 2692 events. 1713/2692 cut-off events. For 151924/151941 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13709 event pairs, 455 based on Foata normal form. 13/2675 useless extension candidates. Maximal degree in co-relation 19949. Up to 2356 conditions per place. [2024-06-20 17:29:34,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 40 changer transitions 0/235 dead transitions. [2024-06-20 17:29:34,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 235 transitions, 2612 flow [2024-06-20 17:29:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:29:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:29:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:29:34,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:29:34,504 INFO L175 Difference]: Start difference. First operand has 163 places, 217 transitions, 2096 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:29:34,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 235 transitions, 2612 flow [2024-06-20 17:29:34,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 235 transitions, 2530 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:29:34,676 INFO L231 Difference]: Finished difference. Result has 168 places, 219 transitions, 2148 flow [2024-06-20 17:29:34,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2148, PETRI_PLACES=168, PETRI_TRANSITIONS=219} [2024-06-20 17:29:34,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 17:29:34,677 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 219 transitions, 2148 flow [2024-06-20 17:29:34,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:34,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:34,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:34,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:29:34,678 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)] === [2024-06-20 17:29:34,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:34,679 INFO L85 PathProgramCache]: Analyzing trace with hash -509553147, now seen corresponding path program 1 times [2024-06-20 17:29:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:34,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44145150] [2024-06-20 17:29:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:35,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44145150] [2024-06-20 17:29:35,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44145150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:35,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:35,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:35,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097037602] [2024-06-20 17:29:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:35,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:35,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:35,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:35,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:35,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:35,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 219 transitions, 2148 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:35,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:35,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:35,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:36,271 INFO L124 PetriNetUnfolderBase]: 2000/3114 cut-off events. [2024-06-20 17:29:36,272 INFO L125 PetriNetUnfolderBase]: For 181115/181115 co-relation queries the response was YES. [2024-06-20 17:29:36,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23640 conditions, 3114 events. 2000/3114 cut-off events. For 181115/181115 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16389 event pairs, 392 based on Foata normal form. 16/3130 useless extension candidates. Maximal degree in co-relation 23562. Up to 2519 conditions per place. [2024-06-20 17:29:36,301 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 39 changer transitions 0/270 dead transitions. [2024-06-20 17:29:36,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 270 transitions, 3100 flow [2024-06-20 17:29:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:29:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:29:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 17:29:36,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 17:29:36,306 INFO L175 Difference]: Start difference. First operand has 168 places, 219 transitions, 2148 flow. Second operand 10 states and 187 transitions. [2024-06-20 17:29:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 270 transitions, 3100 flow [2024-06-20 17:29:36,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 270 transitions, 2994 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:36,484 INFO L231 Difference]: Finished difference. Result has 172 places, 221 transitions, 2200 flow [2024-06-20 17:29:36,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2200, PETRI_PLACES=172, PETRI_TRANSITIONS=221} [2024-06-20 17:29:36,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-20 17:29:36,485 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 221 transitions, 2200 flow [2024-06-20 17:29:36,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:36,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:36,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:36,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:29:36,485 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)] === [2024-06-20 17:29:36,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:36,486 INFO L85 PathProgramCache]: Analyzing trace with hash -650209709, now seen corresponding path program 2 times [2024-06-20 17:29:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500796443] [2024-06-20 17:29:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:37,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:37,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500796443] [2024-06-20 17:29:37,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500796443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:37,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:37,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:37,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476372979] [2024-06-20 17:29:37,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:37,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:37,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:37,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:37,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:37,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 221 transitions, 2200 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:37,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:37,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:37,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:38,056 INFO L124 PetriNetUnfolderBase]: 2050/3194 cut-off events. [2024-06-20 17:29:38,056 INFO L125 PetriNetUnfolderBase]: For 189230/189230 co-relation queries the response was YES. [2024-06-20 17:29:38,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24191 conditions, 3194 events. 2050/3194 cut-off events. For 189230/189230 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16831 event pairs, 528 based on Foata normal form. 20/3214 useless extension candidates. Maximal degree in co-relation 24112. Up to 2838 conditions per place. [2024-06-20 17:29:38,088 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 35 changer transitions 0/261 dead transitions. [2024-06-20 17:29:38,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 2921 flow [2024-06-20 17:29:38,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:29:38,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:29:38,090 INFO L175 Difference]: Start difference. First operand has 172 places, 221 transitions, 2200 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:29:38,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 2921 flow [2024-06-20 17:29:38,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 261 transitions, 2844 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:29:38,306 INFO L231 Difference]: Finished difference. Result has 175 places, 222 transitions, 2244 flow [2024-06-20 17:29:38,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2244, PETRI_PLACES=175, PETRI_TRANSITIONS=222} [2024-06-20 17:29:38,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-20 17:29:38,307 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 222 transitions, 2244 flow [2024-06-20 17:29:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:38,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:38,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:38,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:29:38,307 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)] === [2024-06-20 17:29:38,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash -736905239, now seen corresponding path program 3 times [2024-06-20 17:29:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:38,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104208396] [2024-06-20 17:29:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:38,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:38,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:38,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104208396] [2024-06-20 17:29:38,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104208396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:38,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:38,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:38,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985812565] [2024-06-20 17:29:38,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:38,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:38,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:38,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:38,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:39,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:39,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 222 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:39,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:39,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:39,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:39,767 INFO L124 PetriNetUnfolderBase]: 2022/3152 cut-off events. [2024-06-20 17:29:39,767 INFO L125 PetriNetUnfolderBase]: For 183022/183022 co-relation queries the response was YES. [2024-06-20 17:29:39,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23391 conditions, 3152 events. 2022/3152 cut-off events. For 183022/183022 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16617 event pairs, 494 based on Foata normal form. 16/3168 useless extension candidates. Maximal degree in co-relation 23310. Up to 2676 conditions per place. [2024-06-20 17:29:39,798 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/264 dead transitions. [2024-06-20 17:29:39,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 264 transitions, 2950 flow [2024-06-20 17:29:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:29:39,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:29:39,799 INFO L175 Difference]: Start difference. First operand has 175 places, 222 transitions, 2244 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:29:39,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 264 transitions, 2950 flow [2024-06-20 17:29:40,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 264 transitions, 2855 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:40,056 INFO L231 Difference]: Finished difference. Result has 177 places, 222 transitions, 2227 flow [2024-06-20 17:29:40,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2227, PETRI_PLACES=177, PETRI_TRANSITIONS=222} [2024-06-20 17:29:40,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-20 17:29:40,057 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 222 transitions, 2227 flow [2024-06-20 17:29:40,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:40,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:40,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:40,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:29:40,058 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)] === [2024-06-20 17:29:40,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:40,058 INFO L85 PathProgramCache]: Analyzing trace with hash 93720437, now seen corresponding path program 4 times [2024-06-20 17:29:40,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:40,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732762210] [2024-06-20 17:29:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732762210] [2024-06-20 17:29:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732762210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:40,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:40,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:40,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173196425] [2024-06-20 17:29:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:40,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:40,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:40,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 222 transitions, 2227 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:40,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:40,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:40,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:41,458 INFO L124 PetriNetUnfolderBase]: 2097/3284 cut-off events. [2024-06-20 17:29:41,459 INFO L125 PetriNetUnfolderBase]: For 193486/193488 co-relation queries the response was YES. [2024-06-20 17:29:41,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24129 conditions, 3284 events. 2097/3284 cut-off events. For 193486/193488 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17620 event pairs, 492 based on Foata normal form. 20/3304 useless extension candidates. Maximal degree in co-relation 24047. Up to 2619 conditions per place. [2024-06-20 17:29:41,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 82 changer transitions 0/262 dead transitions. [2024-06-20 17:29:41,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 262 transitions, 2951 flow [2024-06-20 17:29:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 17:29:41,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 17:29:41,491 INFO L175 Difference]: Start difference. First operand has 177 places, 222 transitions, 2227 flow. Second operand 9 states and 173 transitions. [2024-06-20 17:29:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 262 transitions, 2951 flow [2024-06-20 17:29:41,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 262 transitions, 2853 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 17:29:41,757 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2340 flow [2024-06-20 17:29:41,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2340, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-20 17:29:41,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-20 17:29:41,758 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2340 flow [2024-06-20 17:29:41,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:41,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:41,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:41,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:29:41,759 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)] === [2024-06-20 17:29:41,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1371154455, now seen corresponding path program 5 times [2024-06-20 17:29:41,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:41,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205701063] [2024-06-20 17:29:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:41,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:42,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:42,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205701063] [2024-06-20 17:29:42,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205701063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:42,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:42,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:42,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316192380] [2024-06-20 17:29:42,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:42,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:42,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:42,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:42,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:42,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2340 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:42,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:42,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:42,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:43,294 INFO L124 PetriNetUnfolderBase]: 2266/3573 cut-off events. [2024-06-20 17:29:43,295 INFO L125 PetriNetUnfolderBase]: For 220746/220748 co-relation queries the response was YES. [2024-06-20 17:29:43,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26949 conditions, 3573 events. 2266/3573 cut-off events. For 220746/220748 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19660 event pairs, 511 based on Foata normal form. 16/3589 useless extension candidates. Maximal degree in co-relation 26866. Up to 2622 conditions per place. [2024-06-20 17:29:43,332 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-20 17:29:43,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 269 transitions, 3298 flow [2024-06-20 17:29:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 17:29:43,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 17:29:43,334 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2340 flow. Second operand 9 states and 177 transitions. [2024-06-20 17:29:43,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 269 transitions, 3298 flow [2024-06-20 17:29:43,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 269 transitions, 3113 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:43,714 INFO L231 Difference]: Finished difference. Result has 180 places, 225 transitions, 2413 flow [2024-06-20 17:29:43,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2413, PETRI_PLACES=180, PETRI_TRANSITIONS=225} [2024-06-20 17:29:43,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-20 17:29:43,715 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 225 transitions, 2413 flow [2024-06-20 17:29:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:43,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:43,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:43,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:29:43,715 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)] === [2024-06-20 17:29:43,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash 211483585, now seen corresponding path program 6 times [2024-06-20 17:29:43,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:43,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286418950] [2024-06-20 17:29:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:43,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286418950] [2024-06-20 17:29:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286418950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:44,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19301694] [2024-06-20 17:29:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:44,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:44,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 225 transitions, 2413 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:44,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:44,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:44,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:45,425 INFO L124 PetriNetUnfolderBase]: 2230/3508 cut-off events. [2024-06-20 17:29:45,425 INFO L125 PetriNetUnfolderBase]: For 213981/213983 co-relation queries the response was YES. [2024-06-20 17:29:45,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25833 conditions, 3508 events. 2230/3508 cut-off events. For 213981/213983 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19184 event pairs, 501 based on Foata normal form. 20/3528 useless extension candidates. Maximal degree in co-relation 25749. Up to 2842 conditions per place. [2024-06-20 17:29:45,456 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 83 changer transitions 0/265 dead transitions. [2024-06-20 17:29:45,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 265 transitions, 3112 flow [2024-06-20 17:29:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 17:29:45,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 17:29:45,458 INFO L175 Difference]: Start difference. First operand has 180 places, 225 transitions, 2413 flow. Second operand 9 states and 171 transitions. [2024-06-20 17:29:45,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 265 transitions, 3112 flow [2024-06-20 17:29:45,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 2963 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:45,812 INFO L231 Difference]: Finished difference. Result has 184 places, 225 transitions, 2437 flow [2024-06-20 17:29:45,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2437, PETRI_PLACES=184, PETRI_TRANSITIONS=225} [2024-06-20 17:29:45,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-20 17:29:45,813 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 225 transitions, 2437 flow [2024-06-20 17:29:45,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:45,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:45,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:45,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:29:45,814 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)] === [2024-06-20 17:29:45,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -822086481, now seen corresponding path program 1 times [2024-06-20 17:29:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:45,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536213622] [2024-06-20 17:29:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536213622] [2024-06-20 17:29:46,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536213622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:46,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:46,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:29:46,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335995952] [2024-06-20 17:29:46,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:29:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:29:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:29:46,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:46,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 225 transitions, 2437 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:46,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:46,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:46,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:47,614 INFO L124 PetriNetUnfolderBase]: 2271/3574 cut-off events. [2024-06-20 17:29:47,615 INFO L125 PetriNetUnfolderBase]: For 212155/212157 co-relation queries the response was YES. [2024-06-20 17:29:47,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26325 conditions, 3574 events. 2271/3574 cut-off events. For 212155/212157 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19768 event pairs, 497 based on Foata normal form. 12/3586 useless extension candidates. Maximal degree in co-relation 26239. Up to 2554 conditions per place. [2024-06-20 17:29:47,649 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 178 selfloop transitions, 85 changer transitions 0/268 dead transitions. [2024-06-20 17:29:47,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3198 flow [2024-06-20 17:29:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 17:29:47,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 17:29:47,650 INFO L175 Difference]: Start difference. First operand has 184 places, 225 transitions, 2437 flow. Second operand 9 states and 172 transitions. [2024-06-20 17:29:47,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3198 flow [2024-06-20 17:29:47,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 268 transitions, 3022 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:29:47,978 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2481 flow [2024-06-20 17:29:47,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2481, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-20 17:29:47,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 17:29:47,978 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2481 flow [2024-06-20 17:29:47,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:47,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:47,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:47,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:29:47,979 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:47,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1045999512, now seen corresponding path program 1 times [2024-06-20 17:29:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661367778] [2024-06-20 17:29:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:48,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661367778] [2024-06-20 17:29:48,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661367778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:48,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:48,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:48,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4330329] [2024-06-20 17:29:48,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:48,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:48,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:48,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:48,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:48,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:48,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2481 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:48,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:48,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:48,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:49,184 INFO L124 PetriNetUnfolderBase]: 2276/3591 cut-off events. [2024-06-20 17:29:49,184 INFO L125 PetriNetUnfolderBase]: For 209159/209163 co-relation queries the response was YES. [2024-06-20 17:29:49,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26584 conditions, 3591 events. 2276/3591 cut-off events. For 209159/209163 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19786 event pairs, 592 based on Foata normal form. 5/3596 useless extension candidates. Maximal degree in co-relation 26497. Up to 3409 conditions per place. [2024-06-20 17:29:49,217 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-20 17:29:49,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 249 transitions, 3103 flow [2024-06-20 17:29:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:29:49,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:29:49,224 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2481 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:29:49,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 249 transitions, 3103 flow [2024-06-20 17:29:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 249 transitions, 2903 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:49,614 INFO L231 Difference]: Finished difference. Result has 185 places, 229 transitions, 2407 flow [2024-06-20 17:29:49,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2407, PETRI_PLACES=185, PETRI_TRANSITIONS=229} [2024-06-20 17:29:49,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 17:29:49,614 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 229 transitions, 2407 flow [2024-06-20 17:29:49,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:49,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:49,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:49,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:29:49,615 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:49,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1040285592, now seen corresponding path program 2 times [2024-06-20 17:29:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:49,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913227561] [2024-06-20 17:29:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:50,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913227561] [2024-06-20 17:29:50,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913227561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:50,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:50,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:29:50,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944301469] [2024-06-20 17:29:50,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:50,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:29:50,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:29:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:29:50,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:50,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 229 transitions, 2407 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:50,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:50,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:50,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:51,023 INFO L124 PetriNetUnfolderBase]: 2289/3612 cut-off events. [2024-06-20 17:29:51,024 INFO L125 PetriNetUnfolderBase]: For 215235/215239 co-relation queries the response was YES. [2024-06-20 17:29:51,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26455 conditions, 3612 events. 2289/3612 cut-off events. For 215235/215239 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19985 event pairs, 593 based on Foata normal form. 5/3617 useless extension candidates. Maximal degree in co-relation 26367. Up to 3413 conditions per place. [2024-06-20 17:29:51,059 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 36 changer transitions 0/253 dead transitions. [2024-06-20 17:29:51,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 253 transitions, 3183 flow [2024-06-20 17:29:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:29:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:29:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:29:51,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 17:29:51,061 INFO L175 Difference]: Start difference. First operand has 185 places, 229 transitions, 2407 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:29:51,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 253 transitions, 3183 flow [2024-06-20 17:29:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 253 transitions, 3107 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:29:51,476 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 2557 flow [2024-06-20 17:29:51,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2557, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-06-20 17:29:51,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-20 17:29:51,477 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 2557 flow [2024-06-20 17:29:51,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:29:51,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:51,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:51,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:29:51,478 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:51,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1039366915, now seen corresponding path program 7 times [2024-06-20 17:29:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:51,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559547562] [2024-06-20 17:29:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:51,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:52,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:52,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559547562] [2024-06-20 17:29:52,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559547562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:52,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:52,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:52,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523076975] [2024-06-20 17:29:52,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:52,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:52,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:52,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:52,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:52,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:52,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 2557 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:52,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:52,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:52,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:52,990 INFO L124 PetriNetUnfolderBase]: 2364/3731 cut-off events. [2024-06-20 17:29:52,991 INFO L125 PetriNetUnfolderBase]: For 244946/244946 co-relation queries the response was YES. [2024-06-20 17:29:53,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27506 conditions, 3731 events. 2364/3731 cut-off events. For 244946/244946 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20811 event pairs, 512 based on Foata normal form. 20/3748 useless extension candidates. Maximal degree in co-relation 27416. Up to 3063 conditions per place. [2024-06-20 17:29:53,023 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 84 changer transitions 0/275 dead transitions. [2024-06-20 17:29:53,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 275 transitions, 3312 flow [2024-06-20 17:29:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:29:53,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:29:53,025 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 2557 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:29:53,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 275 transitions, 3312 flow [2024-06-20 17:29:53,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 275 transitions, 3236 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:29:53,418 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2702 flow [2024-06-20 17:29:53,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2702, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-20 17:29:53,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-20 17:29:53,419 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2702 flow [2024-06-20 17:29:53,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:53,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:53,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:53,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:29:53,420 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:29:53,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1488554557, now seen corresponding path program 8 times [2024-06-20 17:29:53,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:53,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532520956] [2024-06-20 17:29:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:53,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:54,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532520956] [2024-06-20 17:29:54,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532520956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:54,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:54,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:54,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657816566] [2024-06-20 17:29:54,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:54,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:54,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:54,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:54,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:54,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2702 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:54,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:54,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:54,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:55,058 INFO L124 PetriNetUnfolderBase]: 2439/3864 cut-off events. [2024-06-20 17:29:55,059 INFO L125 PetriNetUnfolderBase]: For 259832/259832 co-relation queries the response was YES. [2024-06-20 17:29:55,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28870 conditions, 3864 events. 2439/3864 cut-off events. For 259832/259832 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21847 event pairs, 539 based on Foata normal form. 20/3881 useless extension candidates. Maximal degree in co-relation 28779. Up to 3188 conditions per place. [2024-06-20 17:29:55,095 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 79 changer transitions 0/277 dead transitions. [2024-06-20 17:29:55,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 3470 flow [2024-06-20 17:29:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 17:29:55,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 17:29:55,098 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2702 flow. Second operand 9 states and 169 transitions. [2024-06-20 17:29:55,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 3470 flow [2024-06-20 17:29:55,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 277 transitions, 3275 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:55,473 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 2720 flow [2024-06-20 17:29:55,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2720, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2024-06-20 17:29:55,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-20 17:29:55,474 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 2720 flow [2024-06-20 17:29:55,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:55,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:55,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:29:55,474 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)] === [2024-06-20 17:29:55,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1289252767, now seen corresponding path program 9 times [2024-06-20 17:29:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:55,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193875352] [2024-06-20 17:29:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:55,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:56,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:56,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193875352] [2024-06-20 17:29:56,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193875352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:56,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:56,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:56,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670249329] [2024-06-20 17:29:56,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:56,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:56,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 2720 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:56,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:56,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:56,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:57,146 INFO L124 PetriNetUnfolderBase]: 2514/3996 cut-off events. [2024-06-20 17:29:57,147 INFO L125 PetriNetUnfolderBase]: For 271017/271017 co-relation queries the response was YES. [2024-06-20 17:29:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29663 conditions, 3996 events. 2514/3996 cut-off events. For 271017/271017 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22789 event pairs, 564 based on Foata normal form. 20/4013 useless extension candidates. Maximal degree in co-relation 29571. Up to 3313 conditions per place. [2024-06-20 17:29:57,189 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 82 changer transitions 0/276 dead transitions. [2024-06-20 17:29:57,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 276 transitions, 3474 flow [2024-06-20 17:29:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:29:57,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:29:57,191 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 2720 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:29:57,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 276 transitions, 3474 flow [2024-06-20 17:29:57,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 276 transitions, 3287 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:57,584 INFO L231 Difference]: Finished difference. Result has 197 places, 239 transitions, 2754 flow [2024-06-20 17:29:57,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2754, PETRI_PLACES=197, PETRI_TRANSITIONS=239} [2024-06-20 17:29:57,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-20 17:29:57,585 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 239 transitions, 2754 flow [2024-06-20 17:29:57,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:57,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:57,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:57,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:29:57,586 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)] === [2024-06-20 17:29:57,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1289104897, now seen corresponding path program 10 times [2024-06-20 17:29:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:57,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398431948] [2024-06-20 17:29:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:29:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:29:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:29:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398431948] [2024-06-20 17:29:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398431948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:29:58,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:29:58,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:29:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147612688] [2024-06-20 17:29:58,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:29:58,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:29:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:29:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:29:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:29:58,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:29:58,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 239 transitions, 2754 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:58,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:29:58,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:29:58,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:29:59,251 INFO L124 PetriNetUnfolderBase]: 2522/4016 cut-off events. [2024-06-20 17:29:59,251 INFO L125 PetriNetUnfolderBase]: For 265555/265555 co-relation queries the response was YES. [2024-06-20 17:29:59,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29346 conditions, 4016 events. 2522/4016 cut-off events. For 265555/265555 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23001 event pairs, 546 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 29253. Up to 2983 conditions per place. [2024-06-20 17:29:59,295 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 86 changer transitions 0/280 dead transitions. [2024-06-20 17:29:59,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 280 transitions, 3536 flow [2024-06-20 17:29:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:29:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:29:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:29:59,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:29:59,297 INFO L175 Difference]: Start difference. First operand has 197 places, 239 transitions, 2754 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:29:59,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 280 transitions, 3536 flow [2024-06-20 17:29:59,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 280 transitions, 3341 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:29:59,883 INFO L231 Difference]: Finished difference. Result has 199 places, 240 transitions, 2789 flow [2024-06-20 17:29:59,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2789, PETRI_PLACES=199, PETRI_TRANSITIONS=240} [2024-06-20 17:29:59,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-20 17:29:59,884 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 240 transitions, 2789 flow [2024-06-20 17:29:59,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:29:59,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:29:59,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:29:59,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:29:59,884 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)] === [2024-06-20 17:29:59,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:29:59,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1114933989, now seen corresponding path program 2 times [2024-06-20 17:29:59,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:29:59,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22689306] [2024-06-20 17:29:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:29:59,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:29:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:00,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:00,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22689306] [2024-06-20 17:30:00,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22689306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:00,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:00,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950744181] [2024-06-20 17:30:00,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:00,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:00,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:00,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:00,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 240 transitions, 2789 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:00,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:00,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:00,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:01,966 INFO L124 PetriNetUnfolderBase]: 2563/4087 cut-off events. [2024-06-20 17:30:01,966 INFO L125 PetriNetUnfolderBase]: For 269318/269318 co-relation queries the response was YES. [2024-06-20 17:30:01,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29806 conditions, 4087 events. 2563/4087 cut-off events. For 269318/269318 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23637 event pairs, 558 based on Foata normal form. 12/4096 useless extension candidates. Maximal degree in co-relation 29712. Up to 3314 conditions per place. [2024-06-20 17:30:02,014 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 85 changer transitions 0/282 dead transitions. [2024-06-20 17:30:02,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 282 transitions, 3588 flow [2024-06-20 17:30:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:30:02,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:30:02,015 INFO L175 Difference]: Start difference. First operand has 199 places, 240 transitions, 2789 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:30:02,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 282 transitions, 3588 flow [2024-06-20 17:30:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 282 transitions, 3376 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:02,502 INFO L231 Difference]: Finished difference. Result has 201 places, 241 transitions, 2807 flow [2024-06-20 17:30:02,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2807, PETRI_PLACES=201, PETRI_TRANSITIONS=241} [2024-06-20 17:30:02,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-20 17:30:02,503 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 241 transitions, 2807 flow [2024-06-20 17:30:02,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:02,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:02,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:30:02,504 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)] === [2024-06-20 17:30:02,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1496179069, now seen corresponding path program 3 times [2024-06-20 17:30:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:02,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535859196] [2024-06-20 17:30:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:03,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535859196] [2024-06-20 17:30:03,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535859196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:03,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:03,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604756772] [2024-06-20 17:30:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:03,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:03,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 241 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:03,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:03,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:03,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:04,538 INFO L124 PetriNetUnfolderBase]: 2604/4166 cut-off events. [2024-06-20 17:30:04,538 INFO L125 PetriNetUnfolderBase]: For 277699/277699 co-relation queries the response was YES. [2024-06-20 17:30:04,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30176 conditions, 4166 events. 2604/4166 cut-off events. For 277699/277699 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24271 event pairs, 585 based on Foata normal form. 12/4175 useless extension candidates. Maximal degree in co-relation 30081. Up to 3265 conditions per place. [2024-06-20 17:30:04,584 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-20 17:30:04,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 283 transitions, 3609 flow [2024-06-20 17:30:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 17:30:04,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 17:30:04,586 INFO L175 Difference]: Start difference. First operand has 201 places, 241 transitions, 2807 flow. Second operand 9 states and 170 transitions. [2024-06-20 17:30:04,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 283 transitions, 3609 flow [2024-06-20 17:30:05,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 283 transitions, 3399 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:05,113 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2821 flow [2024-06-20 17:30:05,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2821, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-20 17:30:05,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-20 17:30:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2821 flow [2024-06-20 17:30:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:05,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:30:05,115 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)] === [2024-06-20 17:30:05,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash -553073381, now seen corresponding path program 4 times [2024-06-20 17:30:05,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:05,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455504065] [2024-06-20 17:30:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:05,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:05,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455504065] [2024-06-20 17:30:05,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455504065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:05,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:05,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:30:05,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176652015] [2024-06-20 17:30:05,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:05,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:30:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:30:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:30:06,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:06,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2821 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:06,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:06,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:06,972 INFO L124 PetriNetUnfolderBase]: 2584/4136 cut-off events. [2024-06-20 17:30:06,972 INFO L125 PetriNetUnfolderBase]: For 269217/269217 co-relation queries the response was YES. [2024-06-20 17:30:06,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29271 conditions, 4136 events. 2584/4136 cut-off events. For 269217/269217 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24081 event pairs, 509 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 29175. Up to 2434 conditions per place. [2024-06-20 17:30:07,014 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 96 changer transitions 0/281 dead transitions. [2024-06-20 17:30:07,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3474 flow [2024-06-20 17:30:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:30:07,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:30:07,033 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2821 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:30:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3474 flow [2024-06-20 17:30:07,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 281 transitions, 3270 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:07,485 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 2729 flow [2024-06-20 17:30:07,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2729, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-06-20 17:30:07,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 17:30:07,487 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 2729 flow [2024-06-20 17:30:07,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:07,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:07,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:07,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:30:07,488 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:07,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1792858836, now seen corresponding path program 3 times [2024-06-20 17:30:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778033008] [2024-06-20 17:30:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:08,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778033008] [2024-06-20 17:30:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778033008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:08,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179422509] [2024-06-20 17:30:08,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:08,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:08,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 2729 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:08,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:08,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:08,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:08,765 INFO L124 PetriNetUnfolderBase]: 2581/4130 cut-off events. [2024-06-20 17:30:08,766 INFO L125 PetriNetUnfolderBase]: For 260198/260198 co-relation queries the response was YES. [2024-06-20 17:30:08,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29234 conditions, 4130 events. 2581/4130 cut-off events. For 260198/260198 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24074 event pairs, 676 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 29137. Up to 3930 conditions per place. [2024-06-20 17:30:08,806 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 225 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-06-20 17:30:08,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3309 flow [2024-06-20 17:30:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:30:08,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:30:08,807 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 2729 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:30:08,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3309 flow [2024-06-20 17:30:09,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 2960 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-20 17:30:09,251 INFO L231 Difference]: Finished difference. Result has 202 places, 241 transitions, 2445 flow [2024-06-20 17:30:09,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2445, PETRI_PLACES=202, PETRI_TRANSITIONS=241} [2024-06-20 17:30:09,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-20 17:30:09,252 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 241 transitions, 2445 flow [2024-06-20 17:30:09,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:09,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:09,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:09,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:30:09,253 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:09,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:09,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1424768664, now seen corresponding path program 4 times [2024-06-20 17:30:09,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:09,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711603208] [2024-06-20 17:30:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:09,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:09,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711603208] [2024-06-20 17:30:09,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711603208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:09,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:09,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:09,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479941626] [2024-06-20 17:30:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:09,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:09,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:09,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 241 transitions, 2445 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:09,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:09,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:09,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:10,552 INFO L124 PetriNetUnfolderBase]: 2573/4117 cut-off events. [2024-06-20 17:30:10,552 INFO L125 PetriNetUnfolderBase]: For 260586/260586 co-relation queries the response was YES. [2024-06-20 17:30:10,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27998 conditions, 4117 events. 2573/4117 cut-off events. For 260586/260586 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23968 event pairs, 674 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 27902. Up to 3893 conditions per place. [2024-06-20 17:30:10,593 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 39 changer transitions 0/256 dead transitions. [2024-06-20 17:30:10,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 256 transitions, 3007 flow [2024-06-20 17:30:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:30:10,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:30:10,595 INFO L175 Difference]: Start difference. First operand has 202 places, 241 transitions, 2445 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:30:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 256 transitions, 3007 flow [2024-06-20 17:30:11,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 256 transitions, 2899 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:11,078 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2423 flow [2024-06-20 17:30:11,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2423, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-20 17:30:11,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-20 17:30:11,078 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2423 flow [2024-06-20 17:30:11,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:11,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:11,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:11,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:30:11,079 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:11,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1573370274, now seen corresponding path program 5 times [2024-06-20 17:30:11,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:11,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588365687] [2024-06-20 17:30:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:11,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:11,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:11,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588365687] [2024-06-20 17:30:11,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588365687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:11,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:11,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493341634] [2024-06-20 17:30:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:11,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:11,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:11,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:11,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2423 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:11,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:11,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:11,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:12,344 INFO L124 PetriNetUnfolderBase]: 2583/4131 cut-off events. [2024-06-20 17:30:12,344 INFO L125 PetriNetUnfolderBase]: For 268161/268165 co-relation queries the response was YES. [2024-06-20 17:30:12,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28007 conditions, 4131 events. 2583/4131 cut-off events. For 268161/268165 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24037 event pairs, 687 based on Foata normal form. 6/4136 useless extension candidates. Maximal degree in co-relation 27911. Up to 3846 conditions per place. [2024-06-20 17:30:12,384 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 61 changer transitions 0/257 dead transitions. [2024-06-20 17:30:12,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 257 transitions, 3146 flow [2024-06-20 17:30:12,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 17:30:12,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 17:30:12,385 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2423 flow. Second operand 7 states and 120 transitions. [2024-06-20 17:30:12,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 257 transitions, 3146 flow [2024-06-20 17:30:13,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 3039 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:13,027 INFO L231 Difference]: Finished difference. Result has 204 places, 245 transitions, 2506 flow [2024-06-20 17:30:13,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2506, PETRI_PLACES=204, PETRI_TRANSITIONS=245} [2024-06-20 17:30:13,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 17:30:13,028 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 245 transitions, 2506 flow [2024-06-20 17:30:13,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:13,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:13,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:13,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:30:13,028 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)] === [2024-06-20 17:30:13,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1390122334, now seen corresponding path program 6 times [2024-06-20 17:30:13,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:13,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523773387] [2024-06-20 17:30:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:13,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:13,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523773387] [2024-06-20 17:30:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523773387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:13,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538610467] [2024-06-20 17:30:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:13,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:13,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 245 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:13,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:13,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:13,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:14,302 INFO L124 PetriNetUnfolderBase]: 2575/4132 cut-off events. [2024-06-20 17:30:14,302 INFO L125 PetriNetUnfolderBase]: For 272422/272426 co-relation queries the response was YES. [2024-06-20 17:30:14,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28004 conditions, 4132 events. 2575/4132 cut-off events. For 272422/272426 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24063 event pairs, 692 based on Foata normal form. 6/4137 useless extension candidates. Maximal degree in co-relation 27907. Up to 3838 conditions per place. [2024-06-20 17:30:14,342 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 65 changer transitions 0/256 dead transitions. [2024-06-20 17:30:14,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 256 transitions, 3048 flow [2024-06-20 17:30:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:30:14,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:30:14,344 INFO L175 Difference]: Start difference. First operand has 204 places, 245 transitions, 2506 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:30:14,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 256 transitions, 3048 flow [2024-06-20 17:30:14,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 256 transitions, 2903 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 17:30:14,994 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 2498 flow [2024-06-20 17:30:14,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-20 17:30:14,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-20 17:30:14,995 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 2498 flow [2024-06-20 17:30:14,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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) [2024-06-20 17:30:14,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:14,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:14,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:30:14,996 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)] === [2024-06-20 17:30:14,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:14,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1587483520, now seen corresponding path program 1 times [2024-06-20 17:30:14,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:14,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924144071] [2024-06-20 17:30:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:14,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924144071] [2024-06-20 17:30:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924144071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:15,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038509735] [2024-06-20 17:30:15,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:15,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:15,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:15,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:15,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:16,365 INFO L124 PetriNetUnfolderBase]: 2435/3943 cut-off events. [2024-06-20 17:30:16,366 INFO L125 PetriNetUnfolderBase]: For 279537/279554 co-relation queries the response was YES. [2024-06-20 17:30:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27110 conditions, 3943 events. 2435/3943 cut-off events. For 279537/279554 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23120 event pairs, 644 based on Foata normal form. 3/3888 useless extension candidates. Maximal degree in co-relation 27012. Up to 3590 conditions per place. [2024-06-20 17:30:16,406 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 189 selfloop transitions, 38 changer transitions 0/263 dead transitions. [2024-06-20 17:30:16,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 263 transitions, 3186 flow [2024-06-20 17:30:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 17:30:16,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 17:30:16,408 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 2498 flow. Second operand 7 states and 122 transitions. [2024-06-20 17:30:16,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 263 transitions, 3186 flow [2024-06-20 17:30:16,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 263 transitions, 2965 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:30:16,814 INFO L231 Difference]: Finished difference. Result has 206 places, 251 transitions, 2433 flow [2024-06-20 17:30:16,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2433, PETRI_PLACES=206, PETRI_TRANSITIONS=251} [2024-06-20 17:30:16,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 17:30:16,815 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 251 transitions, 2433 flow [2024-06-20 17:30:16,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:16,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:16,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:16,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:30:16,816 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:16,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash -289511252, now seen corresponding path program 2 times [2024-06-20 17:30:16,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:16,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569239930] [2024-06-20 17:30:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:17,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:17,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569239930] [2024-06-20 17:30:17,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569239930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:17,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:17,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:30:17,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023620976] [2024-06-20 17:30:17,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:17,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:30:17,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:17,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:30:17,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:30:17,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:30:17,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 251 transitions, 2433 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:17,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:17,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:30:17,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:18,416 INFO L124 PetriNetUnfolderBase]: 2433/3931 cut-off events. [2024-06-20 17:30:18,416 INFO L125 PetriNetUnfolderBase]: For 285441/285458 co-relation queries the response was YES. [2024-06-20 17:30:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27269 conditions, 3931 events. 2433/3931 cut-off events. For 285441/285458 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22951 event pairs, 640 based on Foata normal form. 3/3876 useless extension candidates. Maximal degree in co-relation 27171. Up to 3605 conditions per place. [2024-06-20 17:30:18,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 35 changer transitions 0/262 dead transitions. [2024-06-20 17:30:18,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 2925 flow [2024-06-20 17:30:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 17:30:18,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-20 17:30:18,458 INFO L175 Difference]: Start difference. First operand has 206 places, 251 transitions, 2433 flow. Second operand 7 states and 121 transitions. [2024-06-20 17:30:18,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 2925 flow [2024-06-20 17:30:18,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 262 transitions, 2841 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:18,902 INFO L231 Difference]: Finished difference. Result has 210 places, 251 transitions, 2426 flow [2024-06-20 17:30:18,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=210, PETRI_TRANSITIONS=251} [2024-06-20 17:30:18,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 17:30:18,903 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 251 transitions, 2426 flow [2024-06-20 17:30:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:18,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:18,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:30:18,903 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:18,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:18,904 INFO L85 PathProgramCache]: Analyzing trace with hash 380033338, now seen corresponding path program 1 times [2024-06-20 17:30:18,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:18,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836422072] [2024-06-20 17:30:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:18,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836422072] [2024-06-20 17:30:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836422072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:19,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778008813] [2024-06-20 17:30:19,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:19,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:19,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 251 transitions, 2426 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:19,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:19,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:19,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:20,430 INFO L124 PetriNetUnfolderBase]: 2576/4129 cut-off events. [2024-06-20 17:30:20,431 INFO L125 PetriNetUnfolderBase]: For 290357/290357 co-relation queries the response was YES. [2024-06-20 17:30:20,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28383 conditions, 4129 events. 2576/4129 cut-off events. For 290357/290357 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24057 event pairs, 687 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 28283. Up to 3953 conditions per place. [2024-06-20 17:30:20,472 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 19 changer transitions 0/268 dead transitions. [2024-06-20 17:30:20,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 268 transitions, 3018 flow [2024-06-20 17:30:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:30:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:30:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-20 17:30:20,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:30:20,474 INFO L175 Difference]: Start difference. First operand has 210 places, 251 transitions, 2426 flow. Second operand 7 states and 119 transitions. [2024-06-20 17:30:20,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 268 transitions, 3018 flow [2024-06-20 17:30:21,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 268 transitions, 2912 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:21,091 INFO L231 Difference]: Finished difference. Result has 211 places, 251 transitions, 2368 flow [2024-06-20 17:30:21,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2368, PETRI_PLACES=211, PETRI_TRANSITIONS=251} [2024-06-20 17:30:21,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-20 17:30:21,092 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 251 transitions, 2368 flow [2024-06-20 17:30:21,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:21,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:21,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:21,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:30:21,093 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:21,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1433080787, now seen corresponding path program 1 times [2024-06-20 17:30:21,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063763387] [2024-06-20 17:30:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:21,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:21,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063763387] [2024-06-20 17:30:21,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063763387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:21,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:21,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:21,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237536886] [2024-06-20 17:30:21,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:21,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:21,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:21,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:21,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 251 transitions, 2368 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:21,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:21,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:21,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:22,586 INFO L124 PetriNetUnfolderBase]: 2632/4212 cut-off events. [2024-06-20 17:30:22,586 INFO L125 PetriNetUnfolderBase]: For 313374/313374 co-relation queries the response was YES. [2024-06-20 17:30:22,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29184 conditions, 4212 events. 2632/4212 cut-off events. For 313374/313374 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24618 event pairs, 625 based on Foata normal form. 4/4215 useless extension candidates. Maximal degree in co-relation 29083. Up to 3824 conditions per place. [2024-06-20 17:30:22,633 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 216 selfloop transitions, 75 changer transitions 0/296 dead transitions. [2024-06-20 17:30:22,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 296 transitions, 3417 flow [2024-06-20 17:30:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:22,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:30:22,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:30:22,635 INFO L175 Difference]: Start difference. First operand has 211 places, 251 transitions, 2368 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:30:22,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 296 transitions, 3417 flow [2024-06-20 17:30:23,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 296 transitions, 3369 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:23,394 INFO L231 Difference]: Finished difference. Result has 215 places, 274 transitions, 2777 flow [2024-06-20 17:30:23,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=215, PETRI_TRANSITIONS=274} [2024-06-20 17:30:23,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 17:30:23,411 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 274 transitions, 2777 flow [2024-06-20 17:30:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:23,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:23,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:30:23,411 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:23,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash 383762080, now seen corresponding path program 1 times [2024-06-20 17:30:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63571129] [2024-06-20 17:30:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:24,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:24,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63571129] [2024-06-20 17:30:24,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63571129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:24,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:24,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:24,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975868946] [2024-06-20 17:30:24,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:24,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:24,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:24,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:24,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 274 transitions, 2777 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:24,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:24,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:24,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:25,031 INFO L124 PetriNetUnfolderBase]: 2734/4365 cut-off events. [2024-06-20 17:30:25,031 INFO L125 PetriNetUnfolderBase]: For 349218/349218 co-relation queries the response was YES. [2024-06-20 17:30:25,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31945 conditions, 4365 events. 2734/4365 cut-off events. For 349218/349218 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25526 event pairs, 625 based on Foata normal form. 6/4370 useless extension candidates. Maximal degree in co-relation 31841. Up to 3810 conditions per place. [2024-06-20 17:30:25,079 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 205 selfloop transitions, 97 changer transitions 0/307 dead transitions. [2024-06-20 17:30:25,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 307 transitions, 3945 flow [2024-06-20 17:30:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 17:30:25,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 17:30:25,081 INFO L175 Difference]: Start difference. First operand has 215 places, 274 transitions, 2777 flow. Second operand 8 states and 143 transitions. [2024-06-20 17:30:25,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 307 transitions, 3945 flow [2024-06-20 17:30:25,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 307 transitions, 3827 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:25,836 INFO L231 Difference]: Finished difference. Result has 221 places, 287 transitions, 3152 flow [2024-06-20 17:30:25,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3152, PETRI_PLACES=221, PETRI_TRANSITIONS=287} [2024-06-20 17:30:25,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-20 17:30:25,837 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 287 transitions, 3152 flow [2024-06-20 17:30:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:25,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:25,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:25,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:30:25,838 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:25,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:25,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1436805437, now seen corresponding path program 2 times [2024-06-20 17:30:25,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:25,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021008115] [2024-06-20 17:30:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:26,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:26,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021008115] [2024-06-20 17:30:26,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021008115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:26,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:26,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386311123] [2024-06-20 17:30:26,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:26,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:26,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:26,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 287 transitions, 3152 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:26,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:26,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:26,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:27,331 INFO L124 PetriNetUnfolderBase]: 2798/4461 cut-off events. [2024-06-20 17:30:27,332 INFO L125 PetriNetUnfolderBase]: For 371377/371377 co-relation queries the response was YES. [2024-06-20 17:30:27,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33518 conditions, 4461 events. 2798/4461 cut-off events. For 371377/371377 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 26092 event pairs, 631 based on Foata normal form. 8/4468 useless extension candidates. Maximal degree in co-relation 33412. Up to 3829 conditions per place. [2024-06-20 17:30:27,380 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 211 selfloop transitions, 103 changer transitions 0/319 dead transitions. [2024-06-20 17:30:27,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 319 transitions, 4344 flow [2024-06-20 17:30:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:30:27,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:30:27,382 INFO L175 Difference]: Start difference. First operand has 221 places, 287 transitions, 3152 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:30:27,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 319 transitions, 4344 flow [2024-06-20 17:30:28,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 319 transitions, 4145 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:28,146 INFO L231 Difference]: Finished difference. Result has 226 places, 298 transitions, 3383 flow [2024-06-20 17:30:28,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3383, PETRI_PLACES=226, PETRI_TRANSITIONS=298} [2024-06-20 17:30:28,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-20 17:30:28,147 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 298 transitions, 3383 flow [2024-06-20 17:30:28,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:28,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:28,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:28,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:30:28,147 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:28,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 383756283, now seen corresponding path program 3 times [2024-06-20 17:30:28,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:28,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276442736] [2024-06-20 17:30:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:28,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:28,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276442736] [2024-06-20 17:30:28,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276442736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:28,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:28,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:28,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101270671] [2024-06-20 17:30:28,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:28,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:28,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 298 transitions, 3383 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:28,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:28,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:28,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:29,754 INFO L124 PetriNetUnfolderBase]: 2836/4517 cut-off events. [2024-06-20 17:30:29,754 INFO L125 PetriNetUnfolderBase]: For 376468/376468 co-relation queries the response was YES. [2024-06-20 17:30:29,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34237 conditions, 4517 events. 2836/4517 cut-off events. For 376468/376468 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26439 event pairs, 648 based on Foata normal form. 4/4520 useless extension candidates. Maximal degree in co-relation 34129. Up to 3863 conditions per place. [2024-06-20 17:30:29,805 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 220 selfloop transitions, 105 changer transitions 0/330 dead transitions. [2024-06-20 17:30:29,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 330 transitions, 4583 flow [2024-06-20 17:30:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:30:29,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:30:29,806 INFO L175 Difference]: Start difference. First operand has 226 places, 298 transitions, 3383 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:30:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 330 transitions, 4583 flow [2024-06-20 17:30:30,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 330 transitions, 4390 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:30,597 INFO L231 Difference]: Finished difference. Result has 233 places, 310 transitions, 3699 flow [2024-06-20 17:30:30,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3699, PETRI_PLACES=233, PETRI_TRANSITIONS=310} [2024-06-20 17:30:30,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-20 17:30:30,598 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 310 transitions, 3699 flow [2024-06-20 17:30:30,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:30,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:30,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:30,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:30:30,598 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:30,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:30,599 INFO L85 PathProgramCache]: Analyzing trace with hash -296647855, now seen corresponding path program 4 times [2024-06-20 17:30:30,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:30,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733555301] [2024-06-20 17:30:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:30,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:31,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:31,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733555301] [2024-06-20 17:30:31,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733555301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:31,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:31,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:31,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004013555] [2024-06-20 17:30:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:31,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:31,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:31,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:31,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:31,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:31,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 310 transitions, 3699 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:31,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:31,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:31,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:32,176 INFO L124 PetriNetUnfolderBase]: 2964/4693 cut-off events. [2024-06-20 17:30:32,177 INFO L125 PetriNetUnfolderBase]: For 427570/427572 co-relation queries the response was YES. [2024-06-20 17:30:32,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36948 conditions, 4693 events. 2964/4693 cut-off events. For 427570/427572 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27455 event pairs, 692 based on Foata normal form. 8/4700 useless extension candidates. Maximal degree in co-relation 36836. Up to 3740 conditions per place. [2024-06-20 17:30:32,230 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 130 changer transitions 0/353 dead transitions. [2024-06-20 17:30:32,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 353 transitions, 5253 flow [2024-06-20 17:30:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:30:32,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:30:32,231 INFO L175 Difference]: Start difference. First operand has 233 places, 310 transitions, 3699 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:30:32,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 353 transitions, 5253 flow [2024-06-20 17:30:33,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 353 transitions, 5052 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 17:30:33,028 INFO L231 Difference]: Finished difference. Result has 240 places, 331 transitions, 4214 flow [2024-06-20 17:30:33,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4214, PETRI_PLACES=240, PETRI_TRANSITIONS=331} [2024-06-20 17:30:33,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-20 17:30:33,028 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 331 transitions, 4214 flow [2024-06-20 17:30:33,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:33,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:33,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:33,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:30:33,029 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:33,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash -296647638, now seen corresponding path program 2 times [2024-06-20 17:30:33,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:33,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677227110] [2024-06-20 17:30:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:33,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:33,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:33,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677227110] [2024-06-20 17:30:33,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677227110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:33,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:33,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:33,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666794932] [2024-06-20 17:30:33,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:33,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:33,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:33,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:34,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:34,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 331 transitions, 4214 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:34,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:34,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:34,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:34,936 INFO L124 PetriNetUnfolderBase]: 2950/4673 cut-off events. [2024-06-20 17:30:34,936 INFO L125 PetriNetUnfolderBase]: For 424775/424779 co-relation queries the response was YES. [2024-06-20 17:30:34,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37911 conditions, 4673 events. 2950/4673 cut-off events. For 424775/424779 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27325 event pairs, 670 based on Foata normal form. 6/4678 useless extension candidates. Maximal degree in co-relation 37795. Up to 4354 conditions per place. [2024-06-20 17:30:34,983 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 275 selfloop transitions, 66 changer transitions 0/346 dead transitions. [2024-06-20 17:30:34,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 346 transitions, 5012 flow [2024-06-20 17:30:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 17:30:34,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 17:30:34,984 INFO L175 Difference]: Start difference. First operand has 240 places, 331 transitions, 4214 flow. Second operand 8 states and 133 transitions. [2024-06-20 17:30:34,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 346 transitions, 5012 flow [2024-06-20 17:30:35,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 346 transitions, 4807 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-20 17:30:35,814 INFO L231 Difference]: Finished difference. Result has 246 places, 334 transitions, 4228 flow [2024-06-20 17:30:35,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4228, PETRI_PLACES=246, PETRI_TRANSITIONS=334} [2024-06-20 17:30:35,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-20 17:30:35,815 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 334 transitions, 4228 flow [2024-06-20 17:30:35,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:35,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:35,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:35,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:30:35,816 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:35,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash -142410487, now seen corresponding path program 5 times [2024-06-20 17:30:35,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:35,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943680135] [2024-06-20 17:30:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:36,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943680135] [2024-06-20 17:30:36,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943680135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:36,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:36,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:36,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105417292] [2024-06-20 17:30:36,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:36,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:36,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:36,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:36,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:36,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 334 transitions, 4228 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:36,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:36,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:36,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:37,494 INFO L124 PetriNetUnfolderBase]: 2974/4707 cut-off events. [2024-06-20 17:30:37,494 INFO L125 PetriNetUnfolderBase]: For 437587/437589 co-relation queries the response was YES. [2024-06-20 17:30:37,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37669 conditions, 4707 events. 2974/4707 cut-off events. For 437587/437589 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27577 event pairs, 690 based on Foata normal form. 4/4710 useless extension candidates. Maximal degree in co-relation 37551. Up to 3752 conditions per place. [2024-06-20 17:30:37,543 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 219 selfloop transitions, 139 changer transitions 0/363 dead transitions. [2024-06-20 17:30:37,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 363 transitions, 5665 flow [2024-06-20 17:30:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 17:30:37,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 17:30:37,545 INFO L175 Difference]: Start difference. First operand has 246 places, 334 transitions, 4228 flow. Second operand 8 states and 148 transitions. [2024-06-20 17:30:37,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 363 transitions, 5665 flow [2024-06-20 17:30:38,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 363 transitions, 5476 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 17:30:38,468 INFO L231 Difference]: Finished difference. Result has 249 places, 343 transitions, 4515 flow [2024-06-20 17:30:38,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4039, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=249, PETRI_TRANSITIONS=343} [2024-06-20 17:30:38,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-20 17:30:38,469 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 343 transitions, 4515 flow [2024-06-20 17:30:38,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:38,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:38,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:38,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:30:38,470 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:38,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:38,470 INFO L85 PathProgramCache]: Analyzing trace with hash -289296205, now seen corresponding path program 6 times [2024-06-20 17:30:38,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:38,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628787239] [2024-06-20 17:30:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:38,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:39,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:39,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628787239] [2024-06-20 17:30:39,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628787239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:39,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:39,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025840835] [2024-06-20 17:30:39,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:39,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:39,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:39,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:39,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 343 transitions, 4515 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:39,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:39,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:39,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:40,235 INFO L124 PetriNetUnfolderBase]: 3014/4770 cut-off events. [2024-06-20 17:30:40,235 INFO L125 PetriNetUnfolderBase]: For 457475/457477 co-relation queries the response was YES. [2024-06-20 17:30:40,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38794 conditions, 4770 events. 3014/4770 cut-off events. For 457475/457477 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27990 event pairs, 681 based on Foata normal form. 8/4777 useless extension candidates. Maximal degree in co-relation 38674. Up to 3793 conditions per place. [2024-06-20 17:30:40,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 166 changer transitions 0/372 dead transitions. [2024-06-20 17:30:40,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 372 transitions, 5971 flow [2024-06-20 17:30:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:30:40,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:30:40,299 INFO L175 Difference]: Start difference. First operand has 249 places, 343 transitions, 4515 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:30:40,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 372 transitions, 5971 flow [2024-06-20 17:30:41,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 372 transitions, 5761 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-20 17:30:41,411 INFO L231 Difference]: Finished difference. Result has 255 places, 354 transitions, 4895 flow [2024-06-20 17:30:41,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4895, PETRI_PLACES=255, PETRI_TRANSITIONS=354} [2024-06-20 17:30:41,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-20 17:30:41,412 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 354 transitions, 4895 flow [2024-06-20 17:30:41,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:41,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:41,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:41,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:30:41,413 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:41,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:41,413 INFO L85 PathProgramCache]: Analyzing trace with hash -142195440, now seen corresponding path program 3 times [2024-06-20 17:30:41,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:41,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485915763] [2024-06-20 17:30:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:41,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:42,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:42,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485915763] [2024-06-20 17:30:42,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485915763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:42,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:42,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:42,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887104413] [2024-06-20 17:30:42,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:42,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:42,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:42,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:42,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:42,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:42,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 354 transitions, 4895 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:42,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:42,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:42,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:43,194 INFO L124 PetriNetUnfolderBase]: 3000/4738 cut-off events. [2024-06-20 17:30:43,194 INFO L125 PetriNetUnfolderBase]: For 450251/450255 co-relation queries the response was YES. [2024-06-20 17:30:43,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39215 conditions, 4738 events. 3000/4738 cut-off events. For 450251/450255 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27668 event pairs, 672 based on Foata normal form. 6/4743 useless extension candidates. Maximal degree in co-relation 39092. Up to 4403 conditions per place. [2024-06-20 17:30:43,250 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 85 changer transitions 0/373 dead transitions. [2024-06-20 17:30:43,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 373 transitions, 5793 flow [2024-06-20 17:30:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:30:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:30:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 17:30:43,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 17:30:43,251 INFO L175 Difference]: Start difference. First operand has 255 places, 354 transitions, 4895 flow. Second operand 9 states and 148 transitions. [2024-06-20 17:30:43,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 373 transitions, 5793 flow [2024-06-20 17:30:44,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 373 transitions, 5640 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-20 17:30:44,419 INFO L231 Difference]: Finished difference. Result has 263 places, 360 transitions, 5065 flow [2024-06-20 17:30:44,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5065, PETRI_PLACES=263, PETRI_TRANSITIONS=360} [2024-06-20 17:30:44,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-20 17:30:44,420 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 360 transitions, 5065 flow [2024-06-20 17:30:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:44,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:44,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:44,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:30:44,421 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:44,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1800272613, now seen corresponding path program 1 times [2024-06-20 17:30:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421762963] [2024-06-20 17:30:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:44,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:45,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:45,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421762963] [2024-06-20 17:30:45,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421762963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:45,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850656299] [2024-06-20 17:30:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:45,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:45,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:45,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:45,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:45,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 360 transitions, 5065 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:45,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:45,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:45,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:46,068 INFO L124 PetriNetUnfolderBase]: 3010/4754 cut-off events. [2024-06-20 17:30:46,068 INFO L125 PetriNetUnfolderBase]: For 460051/460053 co-relation queries the response was YES. [2024-06-20 17:30:46,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39536 conditions, 4754 events. 3010/4754 cut-off events. For 460051/460053 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27807 event pairs, 670 based on Foata normal form. 2/4756 useless extension candidates. Maximal degree in co-relation 39410. Up to 4402 conditions per place. [2024-06-20 17:30:46,127 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 316 selfloop transitions, 68 changer transitions 0/389 dead transitions. [2024-06-20 17:30:46,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 389 transitions, 6013 flow [2024-06-20 17:30:46,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:30:46,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:30:46,128 INFO L175 Difference]: Start difference. First operand has 263 places, 360 transitions, 5065 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:30:46,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 389 transitions, 6013 flow [2024-06-20 17:30:47,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 389 transitions, 5710 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-20 17:30:47,098 INFO L231 Difference]: Finished difference. Result has 265 places, 364 transitions, 5003 flow [2024-06-20 17:30:47,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5003, PETRI_PLACES=265, PETRI_TRANSITIONS=364} [2024-06-20 17:30:47,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-20 17:30:47,099 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 364 transitions, 5003 flow [2024-06-20 17:30:47,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:47,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:47,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:30:47,100 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:47,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1562911287, now seen corresponding path program 2 times [2024-06-20 17:30:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442362421] [2024-06-20 17:30:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:47,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:47,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:47,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442362421] [2024-06-20 17:30:47,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442362421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:47,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:47,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600695069] [2024-06-20 17:30:47,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:47,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:47,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:47,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 364 transitions, 5003 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:47,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:47,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:47,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:48,737 INFO L124 PetriNetUnfolderBase]: 3028/4785 cut-off events. [2024-06-20 17:30:48,737 INFO L125 PetriNetUnfolderBase]: For 473422/473424 co-relation queries the response was YES. [2024-06-20 17:30:48,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39908 conditions, 4785 events. 3028/4785 cut-off events. For 473422/473424 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27973 event pairs, 669 based on Foata normal form. 2/4787 useless extension candidates. Maximal degree in co-relation 39780. Up to 4406 conditions per place. [2024-06-20 17:30:48,904 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 314 selfloop transitions, 74 changer transitions 0/393 dead transitions. [2024-06-20 17:30:48,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 393 transitions, 6155 flow [2024-06-20 17:30:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:30:48,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:30:48,906 INFO L175 Difference]: Start difference. First operand has 265 places, 364 transitions, 5003 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:30:48,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 393 transitions, 6155 flow [2024-06-20 17:30:49,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 393 transitions, 6028 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 17:30:49,650 INFO L231 Difference]: Finished difference. Result has 270 places, 370 transitions, 5200 flow [2024-06-20 17:30:49,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4876, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5200, PETRI_PLACES=270, PETRI_TRANSITIONS=370} [2024-06-20 17:30:49,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-20 17:30:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 370 transitions, 5200 flow [2024-06-20 17:30:49,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:49,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:30:49,652 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:49,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:49,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2110886009, now seen corresponding path program 3 times [2024-06-20 17:30:49,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:49,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383770128] [2024-06-20 17:30:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:49,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:50,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:50,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383770128] [2024-06-20 17:30:50,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383770128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:50,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:50,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554831181] [2024-06-20 17:30:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:50,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:50,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:50,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 370 transitions, 5200 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:50,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:50,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:50,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:51,460 INFO L124 PetriNetUnfolderBase]: 3078/4864 cut-off events. [2024-06-20 17:30:51,460 INFO L125 PetriNetUnfolderBase]: For 501980/501982 co-relation queries the response was YES. [2024-06-20 17:30:51,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41226 conditions, 4864 events. 3078/4864 cut-off events. For 501980/501982 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28572 event pairs, 678 based on Foata normal form. 2/4866 useless extension candidates. Maximal degree in co-relation 41096. Up to 4422 conditions per place. [2024-06-20 17:30:51,517 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 305 selfloop transitions, 91 changer transitions 0/401 dead transitions. [2024-06-20 17:30:51,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 401 transitions, 6488 flow [2024-06-20 17:30:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:30:51,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 17:30:51,519 INFO L175 Difference]: Start difference. First operand has 270 places, 370 transitions, 5200 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:30:51,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 401 transitions, 6488 flow [2024-06-20 17:30:52,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 401 transitions, 6332 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:52,403 INFO L231 Difference]: Finished difference. Result has 274 places, 382 transitions, 5580 flow [2024-06-20 17:30:52,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5580, PETRI_PLACES=274, PETRI_TRANSITIONS=382} [2024-06-20 17:30:52,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-20 17:30:52,404 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 382 transitions, 5580 flow [2024-06-20 17:30:52,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:52,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:52,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:52,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:30:52,404 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:52,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 734309829, now seen corresponding path program 4 times [2024-06-20 17:30:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990624512] [2024-06-20 17:30:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:53,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:53,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990624512] [2024-06-20 17:30:53,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990624512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:53,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:53,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58155011] [2024-06-20 17:30:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:53,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:53,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:53,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:53,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:53,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 382 transitions, 5580 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:53,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:53,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:54,293 INFO L124 PetriNetUnfolderBase]: 3088/4869 cut-off events. [2024-06-20 17:30:54,293 INFO L125 PetriNetUnfolderBase]: For 515183/515183 co-relation queries the response was YES. [2024-06-20 17:30:54,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41772 conditions, 4869 events. 3088/4869 cut-off events. For 515183/515183 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28490 event pairs, 674 based on Foata normal form. 2/4870 useless extension candidates. Maximal degree in co-relation 41640. Up to 4512 conditions per place. [2024-06-20 17:30:54,352 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 71 changer transitions 0/409 dead transitions. [2024-06-20 17:30:54,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 409 transitions, 6576 flow [2024-06-20 17:30:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:30:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:30:54,354 INFO L175 Difference]: Start difference. First operand has 274 places, 382 transitions, 5580 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:30:54,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 409 transitions, 6576 flow [2024-06-20 17:30:55,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 409 transitions, 6399 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:55,341 INFO L231 Difference]: Finished difference. Result has 277 places, 386 transitions, 5654 flow [2024-06-20 17:30:55,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5654, PETRI_PLACES=277, PETRI_TRANSITIONS=386} [2024-06-20 17:30:55,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 17:30:55,342 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 386 transitions, 5654 flow [2024-06-20 17:30:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:55,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:55,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:30:55,342 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:55,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1800774889, now seen corresponding path program 5 times [2024-06-20 17:30:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:55,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758265462] [2024-06-20 17:30:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:55,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:56,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:56,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758265462] [2024-06-20 17:30:56,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758265462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:56,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:56,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994077051] [2024-06-20 17:30:56,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:56,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:56,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:56,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 386 transitions, 5654 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:56,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:56,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:56,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:30:57,137 INFO L124 PetriNetUnfolderBase]: 3076/4853 cut-off events. [2024-06-20 17:30:57,137 INFO L125 PetriNetUnfolderBase]: For 520444/520444 co-relation queries the response was YES. [2024-06-20 17:30:57,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41415 conditions, 4853 events. 3076/4853 cut-off events. For 520444/520444 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28447 event pairs, 667 based on Foata normal form. 4/4856 useless extension candidates. Maximal degree in co-relation 41282. Up to 4422 conditions per place. [2024-06-20 17:30:57,196 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 320 selfloop transitions, 83 changer transitions 0/408 dead transitions. [2024-06-20 17:30:57,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 408 transitions, 6702 flow [2024-06-20 17:30:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:30:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:30:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:30:57,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:30:57,198 INFO L175 Difference]: Start difference. First operand has 277 places, 386 transitions, 5654 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:30:57,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 408 transitions, 6702 flow [2024-06-20 17:30:58,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 408 transitions, 6537 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:30:58,470 INFO L231 Difference]: Finished difference. Result has 280 places, 386 transitions, 5663 flow [2024-06-20 17:30:58,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5663, PETRI_PLACES=280, PETRI_TRANSITIONS=386} [2024-06-20 17:30:58,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 17:30:58,471 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 386 transitions, 5663 flow [2024-06-20 17:30:58,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:58,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:30:58,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:30:58,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:30:58,472 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:30:58,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:30:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1372642625, now seen corresponding path program 6 times [2024-06-20 17:30:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:30:58,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954169371] [2024-06-20 17:30:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:30:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:30:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:30:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:30:59,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:30:59,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954169371] [2024-06-20 17:30:59,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954169371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:30:59,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:30:59,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:30:59,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932766705] [2024-06-20 17:30:59,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:30:59,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:30:59,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:30:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:30:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:30:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:30:59,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 386 transitions, 5663 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:30:59,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:30:59,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:30:59,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:00,150 INFO L124 PetriNetUnfolderBase]: 3066/4844 cut-off events. [2024-06-20 17:31:00,150 INFO L125 PetriNetUnfolderBase]: For 520504/520504 co-relation queries the response was YES. [2024-06-20 17:31:00,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41303 conditions, 4844 events. 3066/4844 cut-off events. For 520504/520504 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28418 event pairs, 665 based on Foata normal form. 2/4845 useless extension candidates. Maximal degree in co-relation 41169. Up to 4482 conditions per place. [2024-06-20 17:31:00,212 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 67 changer transitions 0/408 dead transitions. [2024-06-20 17:31:00,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 408 transitions, 6553 flow [2024-06-20 17:31:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:31:00,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:31:00,213 INFO L175 Difference]: Start difference. First operand has 280 places, 386 transitions, 5663 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:31:00,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 408 transitions, 6553 flow [2024-06-20 17:31:01,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 408 transitions, 6362 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:01,440 INFO L231 Difference]: Finished difference. Result has 283 places, 386 transitions, 5613 flow [2024-06-20 17:31:01,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5472, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=283, PETRI_TRANSITIONS=386} [2024-06-20 17:31:01,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-20 17:31:01,441 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 386 transitions, 5613 flow [2024-06-20 17:31:01,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:01,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:01,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:01,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:31:01,442 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:01,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:01,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1207057067, now seen corresponding path program 7 times [2024-06-20 17:31:01,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:01,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573664446] [2024-06-20 17:31:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573664446] [2024-06-20 17:31:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573664446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:02,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680265047] [2024-06-20 17:31:02,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:02,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:02,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 386 transitions, 5613 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:02,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:02,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:02,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:03,100 INFO L124 PetriNetUnfolderBase]: 3060/4842 cut-off events. [2024-06-20 17:31:03,101 INFO L125 PetriNetUnfolderBase]: For 525800/525800 co-relation queries the response was YES. [2024-06-20 17:31:03,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41066 conditions, 4842 events. 3060/4842 cut-off events. For 525800/525800 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28442 event pairs, 664 based on Foata normal form. 2/4843 useless extension candidates. Maximal degree in co-relation 40931. Up to 4445 conditions per place. [2024-06-20 17:31:03,158 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 325 selfloop transitions, 77 changer transitions 0/407 dead transitions. [2024-06-20 17:31:03,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 407 transitions, 6655 flow [2024-06-20 17:31:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:31:03,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:31:03,160 INFO L175 Difference]: Start difference. First operand has 283 places, 386 transitions, 5613 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:31:03,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 407 transitions, 6655 flow [2024-06-20 17:31:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 407 transitions, 6460 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 17:31:04,522 INFO L231 Difference]: Finished difference. Result has 282 places, 386 transitions, 5578 flow [2024-06-20 17:31:04,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5578, PETRI_PLACES=282, PETRI_TRANSITIONS=386} [2024-06-20 17:31:04,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 17:31:04,523 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 386 transitions, 5578 flow [2024-06-20 17:31:04,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:04,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:04,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:04,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:31:04,523 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:04,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1591108937, now seen corresponding path program 8 times [2024-06-20 17:31:04,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:04,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71295148] [2024-06-20 17:31:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:04,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:05,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:05,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71295148] [2024-06-20 17:31:05,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71295148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:05,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:05,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:05,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201938901] [2024-06-20 17:31:05,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:05,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:05,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:05,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:05,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 386 transitions, 5578 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:05,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:05,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:05,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:06,290 INFO L124 PetriNetUnfolderBase]: 3090/4880 cut-off events. [2024-06-20 17:31:06,290 INFO L125 PetriNetUnfolderBase]: For 551893/551893 co-relation queries the response was YES. [2024-06-20 17:31:06,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41526 conditions, 4880 events. 3090/4880 cut-off events. For 551893/551893 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28697 event pairs, 672 based on Foata normal form. 6/4885 useless extension candidates. Maximal degree in co-relation 41392. Up to 4161 conditions per place. [2024-06-20 17:31:06,348 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 279 selfloop transitions, 129 changer transitions 0/413 dead transitions. [2024-06-20 17:31:06,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 413 transitions, 6933 flow [2024-06-20 17:31:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:31:06,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:31:06,350 INFO L175 Difference]: Start difference. First operand has 282 places, 386 transitions, 5578 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:31:06,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 413 transitions, 6933 flow [2024-06-20 17:31:07,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 6704 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 17:31:07,707 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 5765 flow [2024-06-20 17:31:07,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5765, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-20 17:31:07,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-20 17:31:07,708 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 5765 flow [2024-06-20 17:31:07,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:07,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:07,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:07,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:31:07,709 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:07,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1590842027, now seen corresponding path program 9 times [2024-06-20 17:31:07,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:07,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776083162] [2024-06-20 17:31:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:07,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:08,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776083162] [2024-06-20 17:31:08,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776083162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:08,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:08,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:08,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747629480] [2024-06-20 17:31:08,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:08,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:08,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:08,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:08,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:08,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 5765 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:08,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:08,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:08,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:09,409 INFO L124 PetriNetUnfolderBase]: 3070/4854 cut-off events. [2024-06-20 17:31:09,409 INFO L125 PetriNetUnfolderBase]: For 544906/544906 co-relation queries the response was YES. [2024-06-20 17:31:09,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41141 conditions, 4854 events. 3070/4854 cut-off events. For 544906/544906 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28496 event pairs, 662 based on Foata normal form. 6/4859 useless extension candidates. Maximal degree in co-relation 41007. Up to 4150 conditions per place. [2024-06-20 17:31:09,468 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 275 selfloop transitions, 133 changer transitions 0/413 dead transitions. [2024-06-20 17:31:09,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 413 transitions, 6981 flow [2024-06-20 17:31:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 17:31:09,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 17:31:09,470 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 5765 flow. Second operand 8 states and 145 transitions. [2024-06-20 17:31:09,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 413 transitions, 6981 flow [2024-06-20 17:31:10,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 413 transitions, 6680 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:10,898 INFO L231 Difference]: Finished difference. Result has 286 places, 393 transitions, 5741 flow [2024-06-20 17:31:10,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5464, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5741, PETRI_PLACES=286, PETRI_TRANSITIONS=393} [2024-06-20 17:31:10,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 17:31:10,899 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 393 transitions, 5741 flow [2024-06-20 17:31:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:10,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:10,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:31:10,900 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:10,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -613954123, now seen corresponding path program 10 times [2024-06-20 17:31:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:10,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632958701] [2024-06-20 17:31:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:11,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:11,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:11,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632958701] [2024-06-20 17:31:11,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632958701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:11,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:11,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305841091] [2024-06-20 17:31:11,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:11,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:11,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:11,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:11,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 393 transitions, 5741 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:11,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:11,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:11,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:12,696 INFO L124 PetriNetUnfolderBase]: 3128/4942 cut-off events. [2024-06-20 17:31:12,696 INFO L125 PetriNetUnfolderBase]: For 567517/567519 co-relation queries the response was YES. [2024-06-20 17:31:12,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42036 conditions, 4942 events. 3128/4942 cut-off events. For 567517/567519 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29064 event pairs, 702 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 41901. Up to 3880 conditions per place. [2024-06-20 17:31:12,759 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 198 changer transitions 0/420 dead transitions. [2024-06-20 17:31:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 420 transitions, 7274 flow [2024-06-20 17:31:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:31:12,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:31:12,761 INFO L175 Difference]: Start difference. First operand has 286 places, 393 transitions, 5741 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:31:12,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 420 transitions, 7274 flow [2024-06-20 17:31:14,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 420 transitions, 6815 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 17:31:14,144 INFO L231 Difference]: Finished difference. Result has 286 places, 402 transitions, 5849 flow [2024-06-20 17:31:14,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5849, PETRI_PLACES=286, PETRI_TRANSITIONS=402} [2024-06-20 17:31:14,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 17:31:14,145 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 402 transitions, 5849 flow [2024-06-20 17:31:14,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:14,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:14,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:31:14,145 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:14,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash -606335563, now seen corresponding path program 11 times [2024-06-20 17:31:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:14,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679612566] [2024-06-20 17:31:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:14,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:14,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679612566] [2024-06-20 17:31:14,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679612566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:14,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:14,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:14,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189137820] [2024-06-20 17:31:14,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:14,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:14,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:14,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:14,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:14,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 402 transitions, 5849 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:14,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:14,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:15,856 INFO L124 PetriNetUnfolderBase]: 3158/4986 cut-off events. [2024-06-20 17:31:15,856 INFO L125 PetriNetUnfolderBase]: For 580492/580494 co-relation queries the response was YES. [2024-06-20 17:31:15,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42690 conditions, 4986 events. 3158/4986 cut-off events. For 580492/580494 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29369 event pairs, 701 based on Foata normal form. 6/4991 useless extension candidates. Maximal degree in co-relation 42554. Up to 3902 conditions per place. [2024-06-20 17:31:15,918 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 187 changer transitions 0/425 dead transitions. [2024-06-20 17:31:15,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 425 transitions, 7337 flow [2024-06-20 17:31:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:31:15,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:31:15,919 INFO L175 Difference]: Start difference. First operand has 286 places, 402 transitions, 5849 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:31:15,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 425 transitions, 7337 flow [2024-06-20 17:31:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 425 transitions, 6846 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:17,341 INFO L231 Difference]: Finished difference. Result has 289 places, 407 transitions, 5831 flow [2024-06-20 17:31:17,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5831, PETRI_PLACES=289, PETRI_TRANSITIONS=407} [2024-06-20 17:31:17,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-20 17:31:17,341 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 407 transitions, 5831 flow [2024-06-20 17:31:17,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:17,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:17,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:17,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:31:17,342 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:17,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:17,342 INFO L85 PathProgramCache]: Analyzing trace with hash -606602473, now seen corresponding path program 12 times [2024-06-20 17:31:17,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:17,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686910528] [2024-06-20 17:31:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:17,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:18,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:18,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686910528] [2024-06-20 17:31:18,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686910528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:18,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871093739] [2024-06-20 17:31:18,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:18,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 407 transitions, 5831 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:18,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:18,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:18,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:19,127 INFO L124 PetriNetUnfolderBase]: 3140/4957 cut-off events. [2024-06-20 17:31:19,128 INFO L125 PetriNetUnfolderBase]: For 570717/570719 co-relation queries the response was YES. [2024-06-20 17:31:19,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42050 conditions, 4957 events. 3140/4957 cut-off events. For 570717/570719 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29134 event pairs, 722 based on Foata normal form. 6/4962 useless extension candidates. Maximal degree in co-relation 41913. Up to 3893 conditions per place. [2024-06-20 17:31:19,192 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 237 selfloop transitions, 183 changer transitions 0/425 dead transitions. [2024-06-20 17:31:19,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 425 transitions, 7239 flow [2024-06-20 17:31:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 17:31:19,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 17:31:19,193 INFO L175 Difference]: Start difference. First operand has 289 places, 407 transitions, 5831 flow. Second operand 8 states and 149 transitions. [2024-06-20 17:31:19,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 425 transitions, 7239 flow [2024-06-20 17:31:20,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 425 transitions, 6855 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 17:31:20,675 INFO L231 Difference]: Finished difference. Result has 292 places, 407 transitions, 5822 flow [2024-06-20 17:31:20,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5822, PETRI_PLACES=292, PETRI_TRANSITIONS=407} [2024-06-20 17:31:20,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-20 17:31:20,676 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 407 transitions, 5822 flow [2024-06-20 17:31:20,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:20,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:20,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:20,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:31:20,677 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:20,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:20,677 INFO L85 PathProgramCache]: Analyzing trace with hash -369675859, now seen corresponding path program 1 times [2024-06-20 17:31:20,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:20,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052518296] [2024-06-20 17:31:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:21,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:21,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052518296] [2024-06-20 17:31:21,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052518296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:21,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58789515] [2024-06-20 17:31:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:21,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:21,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 407 transitions, 5822 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:21,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:21,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:21,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:22,584 INFO L124 PetriNetUnfolderBase]: 3049/4880 cut-off events. [2024-06-20 17:31:22,584 INFO L125 PetriNetUnfolderBase]: For 624795/624797 co-relation queries the response was YES. [2024-06-20 17:31:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42032 conditions, 4880 events. 3049/4880 cut-off events. For 624795/624797 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29192 event pairs, 664 based on Foata normal form. 9/4852 useless extension candidates. Maximal degree in co-relation 41894. Up to 4141 conditions per place. [2024-06-20 17:31:22,654 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 305 selfloop transitions, 47 changer transitions 0/431 dead transitions. [2024-06-20 17:31:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 431 transitions, 6862 flow [2024-06-20 17:31:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 17:31:22,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 17:31:22,656 INFO L175 Difference]: Start difference. First operand has 292 places, 407 transitions, 5822 flow. Second operand 8 states and 142 transitions. [2024-06-20 17:31:22,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 431 transitions, 6862 flow [2024-06-20 17:31:24,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 431 transitions, 6350 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 17:31:24,280 INFO L231 Difference]: Finished difference. Result has 290 places, 409 transitions, 5446 flow [2024-06-20 17:31:24,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=290, PETRI_TRANSITIONS=409} [2024-06-20 17:31:24,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 17:31:24,281 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 409 transitions, 5446 flow [2024-06-20 17:31:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:24,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:24,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:24,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:31:24,281 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:24,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:24,282 INFO L85 PathProgramCache]: Analyzing trace with hash -370180849, now seen corresponding path program 2 times [2024-06-20 17:31:24,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:24,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375833332] [2024-06-20 17:31:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:25,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375833332] [2024-06-20 17:31:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375833332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:25,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:25,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:25,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479789131] [2024-06-20 17:31:25,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:25,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:25,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:25,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:25,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 409 transitions, 5446 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:25,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:25,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:25,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:26,100 INFO L124 PetriNetUnfolderBase]: 3084/4922 cut-off events. [2024-06-20 17:31:26,100 INFO L125 PetriNetUnfolderBase]: For 646407/646409 co-relation queries the response was YES. [2024-06-20 17:31:26,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41851 conditions, 4922 events. 3084/4922 cut-off events. For 646407/646409 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29437 event pairs, 674 based on Foata normal form. 10/4894 useless extension candidates. Maximal degree in co-relation 41714. Up to 4323 conditions per place. [2024-06-20 17:31:26,166 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 302 selfloop transitions, 45 changer transitions 0/426 dead transitions. [2024-06-20 17:31:26,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 426 transitions, 6232 flow [2024-06-20 17:31:26,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:31:26,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:31:26,167 INFO L175 Difference]: Start difference. First operand has 290 places, 409 transitions, 5446 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:31:26,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 426 transitions, 6232 flow [2024-06-20 17:31:27,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 426 transitions, 6171 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:31:27,875 INFO L231 Difference]: Finished difference. Result has 294 places, 410 transitions, 5503 flow [2024-06-20 17:31:27,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5503, PETRI_PLACES=294, PETRI_TRANSITIONS=410} [2024-06-20 17:31:27,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-20 17:31:27,875 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 410 transitions, 5503 flow [2024-06-20 17:31:27,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:27,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:27,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:27,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:31:27,876 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:27,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash -384912979, now seen corresponding path program 3 times [2024-06-20 17:31:27,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:27,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259597428] [2024-06-20 17:31:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:27,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:28,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259597428] [2024-06-20 17:31:28,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259597428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:28,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:28,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:31:28,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224125675] [2024-06-20 17:31:28,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:28,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:31:28,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:31:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:31:28,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 17:31:28,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 410 transitions, 5503 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:28,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:28,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 17:31:28,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:29,935 INFO L124 PetriNetUnfolderBase]: 3116/4970 cut-off events. [2024-06-20 17:31:29,935 INFO L125 PetriNetUnfolderBase]: For 662541/662543 co-relation queries the response was YES. [2024-06-20 17:31:29,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42136 conditions, 4970 events. 3116/4970 cut-off events. For 662541/662543 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29710 event pairs, 674 based on Foata normal form. 15/4949 useless extension candidates. Maximal degree in co-relation 41997. Up to 4367 conditions per place. [2024-06-20 17:31:30,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 39 changer transitions 0/429 dead transitions. [2024-06-20 17:31:30,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 429 transitions, 6331 flow [2024-06-20 17:31:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:31:30,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:31:30,008 INFO L175 Difference]: Start difference. First operand has 294 places, 410 transitions, 5503 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:31:30,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 429 transitions, 6331 flow [2024-06-20 17:31:31,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 429 transitions, 6237 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:31,676 INFO L231 Difference]: Finished difference. Result has 296 places, 412 transitions, 5543 flow [2024-06-20 17:31:31,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5543, PETRI_PLACES=296, PETRI_TRANSITIONS=412} [2024-06-20 17:31:31,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-20 17:31:31,678 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 412 transitions, 5543 flow [2024-06-20 17:31:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:31,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:31,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:31,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:31:31,678 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:31,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1106608995, now seen corresponding path program 1 times [2024-06-20 17:31:31,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:31,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312488997] [2024-06-20 17:31:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:31,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312488997] [2024-06-20 17:31:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312488997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:32,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:32,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:32,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32668616] [2024-06-20 17:31:32,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:32,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:32,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:32,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:32,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:32,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 412 transitions, 5543 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:32,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:32,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:32,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:33,780 INFO L124 PetriNetUnfolderBase]: 3297/5215 cut-off events. [2024-06-20 17:31:33,780 INFO L125 PetriNetUnfolderBase]: For 630500/630500 co-relation queries the response was YES. [2024-06-20 17:31:33,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44131 conditions, 5215 events. 3297/5215 cut-off events. For 630500/630500 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31016 event pairs, 673 based on Foata normal form. 2/5217 useless extension candidates. Maximal degree in co-relation 43991. Up to 4968 conditions per place. [2024-06-20 17:31:33,851 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 17 changer transitions 0/436 dead transitions. [2024-06-20 17:31:33,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 436 transitions, 6555 flow [2024-06-20 17:31:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:31:33,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 17:31:33,853 INFO L175 Difference]: Start difference. First operand has 296 places, 412 transitions, 5543 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:31:33,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 436 transitions, 6555 flow [2024-06-20 17:31:35,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 436 transitions, 6453 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:35,368 INFO L231 Difference]: Finished difference. Result has 298 places, 414 transitions, 5552 flow [2024-06-20 17:31:35,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5441, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5552, PETRI_PLACES=298, PETRI_TRANSITIONS=414} [2024-06-20 17:31:35,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-20 17:31:35,369 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 414 transitions, 5552 flow [2024-06-20 17:31:35,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:35,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:35,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:35,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:31:35,369 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:35,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1103867355, now seen corresponding path program 2 times [2024-06-20 17:31:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24405004] [2024-06-20 17:31:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24405004] [2024-06-20 17:31:36,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24405004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:36,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362839496] [2024-06-20 17:31:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:36,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:36,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 414 transitions, 5552 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:36,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:36,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:37,441 INFO L124 PetriNetUnfolderBase]: 3305/5219 cut-off events. [2024-06-20 17:31:37,441 INFO L125 PetriNetUnfolderBase]: For 643348/643348 co-relation queries the response was YES. [2024-06-20 17:31:37,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44320 conditions, 5219 events. 3305/5219 cut-off events. For 643348/643348 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30994 event pairs, 705 based on Foata normal form. 2/5221 useless extension candidates. Maximal degree in co-relation 44179. Up to 4989 conditions per place. [2024-06-20 17:31:37,511 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 409 selfloop transitions, 21 changer transitions 0/435 dead transitions. [2024-06-20 17:31:37,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 435 transitions, 6554 flow [2024-06-20 17:31:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:31:37,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:31:37,513 INFO L175 Difference]: Start difference. First operand has 298 places, 414 transitions, 5552 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:31:37,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 435 transitions, 6554 flow [2024-06-20 17:31:39,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 435 transitions, 6459 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:39,551 INFO L231 Difference]: Finished difference. Result has 300 places, 416 transitions, 5581 flow [2024-06-20 17:31:39,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5457, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5581, PETRI_PLACES=300, PETRI_TRANSITIONS=416} [2024-06-20 17:31:39,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-20 17:31:39,552 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 416 transitions, 5581 flow [2024-06-20 17:31:39,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:39,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:39,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:31:39,553 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:39,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1473031301, now seen corresponding path program 1 times [2024-06-20 17:31:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013799955] [2024-06-20 17:31:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:40,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013799955] [2024-06-20 17:31:40,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013799955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:40,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:40,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404317493] [2024-06-20 17:31:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:40,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:40,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:40,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 416 transitions, 5581 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:40,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:40,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:40,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:41,780 INFO L124 PetriNetUnfolderBase]: 3299/5208 cut-off events. [2024-06-20 17:31:41,781 INFO L125 PetriNetUnfolderBase]: For 647754/647754 co-relation queries the response was YES. [2024-06-20 17:31:41,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44216 conditions, 5208 events. 3299/5208 cut-off events. For 647754/647754 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30923 event pairs, 684 based on Foata normal form. 2/5209 useless extension candidates. Maximal degree in co-relation 44074. Up to 4725 conditions per place. [2024-06-20 17:31:41,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 98 changer transitions 0/438 dead transitions. [2024-06-20 17:31:41,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 438 transitions, 6715 flow [2024-06-20 17:31:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:31:41,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:31:41,848 INFO L175 Difference]: Start difference. First operand has 300 places, 416 transitions, 5581 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:31:41,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 438 transitions, 6715 flow [2024-06-20 17:31:43,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 438 transitions, 6575 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:43,776 INFO L231 Difference]: Finished difference. Result has 302 places, 416 transitions, 5656 flow [2024-06-20 17:31:43,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5441, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5656, PETRI_PLACES=302, PETRI_TRANSITIONS=416} [2024-06-20 17:31:43,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-20 17:31:43,777 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 416 transitions, 5656 flow [2024-06-20 17:31:43,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:43,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:43,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:43,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:31:43,778 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:43,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:43,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1591118857, now seen corresponding path program 3 times [2024-06-20 17:31:43,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:43,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371759085] [2024-06-20 17:31:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:43,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371759085] [2024-06-20 17:31:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371759085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:44,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840494546] [2024-06-20 17:31:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:44,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:44,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 416 transitions, 5656 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:44,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:44,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:45,836 INFO L124 PetriNetUnfolderBase]: 3307/5225 cut-off events. [2024-06-20 17:31:45,836 INFO L125 PetriNetUnfolderBase]: For 664168/664168 co-relation queries the response was YES. [2024-06-20 17:31:45,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44675 conditions, 5225 events. 3307/5225 cut-off events. For 664168/664168 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31105 event pairs, 697 based on Foata normal form. 2/5227 useless extension candidates. Maximal degree in co-relation 44532. Up to 4986 conditions per place. [2024-06-20 17:31:45,905 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 26 changer transitions 0/435 dead transitions. [2024-06-20 17:31:45,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 435 transitions, 6652 flow [2024-06-20 17:31:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:31:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:31:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:31:45,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:31:45,907 INFO L175 Difference]: Start difference. First operand has 302 places, 416 transitions, 5656 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:31:45,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 435 transitions, 6652 flow [2024-06-20 17:31:47,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6411 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:31:47,888 INFO L231 Difference]: Finished difference. Result has 303 places, 418 transitions, 5552 flow [2024-06-20 17:31:47,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5415, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5552, PETRI_PLACES=303, PETRI_TRANSITIONS=418} [2024-06-20 17:31:47,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-20 17:31:47,889 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 418 transitions, 5552 flow [2024-06-20 17:31:47,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:47,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:47,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:47,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:31:47,889 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:47,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:47,890 INFO L85 PathProgramCache]: Analyzing trace with hash -988276167, now seen corresponding path program 1 times [2024-06-20 17:31:47,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:47,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581350393] [2024-06-20 17:31:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:47,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581350393] [2024-06-20 17:31:48,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581350393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:48,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:48,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691771649] [2024-06-20 17:31:48,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:48,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:48,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 418 transitions, 5552 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:48,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:48,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:48,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:50,071 INFO L124 PetriNetUnfolderBase]: 3323/5243 cut-off events. [2024-06-20 17:31:50,071 INFO L125 PetriNetUnfolderBase]: For 687001/687001 co-relation queries the response was YES. [2024-06-20 17:31:50,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44775 conditions, 5243 events. 3323/5243 cut-off events. For 687001/687001 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31181 event pairs, 700 based on Foata normal form. 4/5246 useless extension candidates. Maximal degree in co-relation 44632. Up to 4952 conditions per place. [2024-06-20 17:31:50,145 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 386 selfloop transitions, 48 changer transitions 0/439 dead transitions. [2024-06-20 17:31:50,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 439 transitions, 6580 flow [2024-06-20 17:31:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:31:50,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:31:50,147 INFO L175 Difference]: Start difference. First operand has 303 places, 418 transitions, 5552 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:31:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 439 transitions, 6580 flow [2024-06-20 17:31:52,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 439 transitions, 6459 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:52,238 INFO L231 Difference]: Finished difference. Result has 306 places, 421 transitions, 5633 flow [2024-06-20 17:31:52,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5633, PETRI_PLACES=306, PETRI_TRANSITIONS=421} [2024-06-20 17:31:52,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-20 17:31:52,239 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 421 transitions, 5633 flow [2024-06-20 17:31:52,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:52,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:52,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:52,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:31:52,239 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:52,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash -378246553, now seen corresponding path program 1 times [2024-06-20 17:31:52,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:52,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132281720] [2024-06-20 17:31:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:52,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:53,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:53,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132281720] [2024-06-20 17:31:53,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132281720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:53,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:53,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:53,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109040875] [2024-06-20 17:31:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:53,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:53,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:53,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:53,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:53,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 421 transitions, 5633 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:53,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:53,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:53,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:54,405 INFO L124 PetriNetUnfolderBase]: 3311/5218 cut-off events. [2024-06-20 17:31:54,405 INFO L125 PetriNetUnfolderBase]: For 684833/684835 co-relation queries the response was YES. [2024-06-20 17:31:54,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44523 conditions, 5218 events. 3311/5218 cut-off events. For 684833/684835 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30958 event pairs, 727 based on Foata normal form. 4/5221 useless extension candidates. Maximal degree in co-relation 44379. Up to 4173 conditions per place. [2024-06-20 17:31:54,476 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 221 selfloop transitions, 213 changer transitions 0/439 dead transitions. [2024-06-20 17:31:54,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 439 transitions, 6935 flow [2024-06-20 17:31:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:31:54,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:31:54,478 INFO L175 Difference]: Start difference. First operand has 306 places, 421 transitions, 5633 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:31:54,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 439 transitions, 6935 flow [2024-06-20 17:31:57,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 439 transitions, 6714 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-20 17:31:57,110 INFO L231 Difference]: Finished difference. Result has 309 places, 421 transitions, 5845 flow [2024-06-20 17:31:57,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5845, PETRI_PLACES=309, PETRI_TRANSITIONS=421} [2024-06-20 17:31:57,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 17:31:57,111 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 421 transitions, 5845 flow [2024-06-20 17:31:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:57,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:57,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:57,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:31:57,111 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:31:57,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -816380923, now seen corresponding path program 2 times [2024-06-20 17:31:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:57,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843465458] [2024-06-20 17:31:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843465458] [2024-06-20 17:31:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843465458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:58,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:58,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:31:58,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65775324] [2024-06-20 17:31:58,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:58,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:31:58,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:31:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:31:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:31:58,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 421 transitions, 5845 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:58,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:58,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:31:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:59,206 INFO L124 PetriNetUnfolderBase]: 3337/5263 cut-off events. [2024-06-20 17:31:59,206 INFO L125 PetriNetUnfolderBase]: For 700403/700407 co-relation queries the response was YES. [2024-06-20 17:31:59,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45456 conditions, 5263 events. 3337/5263 cut-off events. For 700403/700407 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31259 event pairs, 709 based on Foata normal form. 8/5270 useless extension candidates. Maximal degree in co-relation 45311. Up to 4916 conditions per place. [2024-06-20 17:31:59,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 76 changer transitions 0/442 dead transitions. [2024-06-20 17:31:59,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 442 transitions, 6911 flow [2024-06-20 17:31:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:31:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:31:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:31:59,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:31:59,280 INFO L175 Difference]: Start difference. First operand has 309 places, 421 transitions, 5845 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:31:59,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 442 transitions, 6911 flow [2024-06-20 17:32:02,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 442 transitions, 6454 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:32:02,042 INFO L231 Difference]: Finished difference. Result has 311 places, 428 transitions, 5711 flow [2024-06-20 17:32:02,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5711, PETRI_PLACES=311, PETRI_TRANSITIONS=428} [2024-06-20 17:32:02,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-20 17:32:02,046 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 428 transitions, 5711 flow [2024-06-20 17:32:02,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:02,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:02,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:02,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:32:02,046 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:02,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash -369965585, now seen corresponding path program 3 times [2024-06-20 17:32:02,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:02,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383120930] [2024-06-20 17:32:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:02,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:02,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383120930] [2024-06-20 17:32:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383120930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:02,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:02,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124309631] [2024-06-20 17:32:02,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:02,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:03,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:03,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 428 transitions, 5711 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:03,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:03,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:03,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:04,227 INFO L124 PetriNetUnfolderBase]: 3353/5295 cut-off events. [2024-06-20 17:32:04,227 INFO L125 PetriNetUnfolderBase]: For 715451/715455 co-relation queries the response was YES. [2024-06-20 17:32:04,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45457 conditions, 5295 events. 3353/5295 cut-off events. For 715451/715455 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31590 event pairs, 715 based on Foata normal form. 8/5302 useless extension candidates. Maximal degree in co-relation 45310. Up to 4904 conditions per place. [2024-06-20 17:32:04,294 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 95 changer transitions 0/446 dead transitions. [2024-06-20 17:32:04,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 446 transitions, 6747 flow [2024-06-20 17:32:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:32:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:32:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 17:32:04,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-20 17:32:04,295 INFO L175 Difference]: Start difference. First operand has 311 places, 428 transitions, 5711 flow. Second operand 10 states and 162 transitions. [2024-06-20 17:32:04,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 446 transitions, 6747 flow [2024-06-20 17:32:06,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 446 transitions, 6510 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:06,931 INFO L231 Difference]: Finished difference. Result has 315 places, 431 transitions, 5786 flow [2024-06-20 17:32:06,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5474, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5786, PETRI_PLACES=315, PETRI_TRANSITIONS=431} [2024-06-20 17:32:06,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-20 17:32:06,932 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 431 transitions, 5786 flow [2024-06-20 17:32:06,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:06,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:06,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:32:06,933 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:06,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash -369957215, now seen corresponding path program 4 times [2024-06-20 17:32:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:06,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008860516] [2024-06-20 17:32:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:07,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:07,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008860516] [2024-06-20 17:32:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008860516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:07,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786760311] [2024-06-20 17:32:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:07,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:07,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 431 transitions, 5786 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:07,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:07,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:09,127 INFO L124 PetriNetUnfolderBase]: 3382/5344 cut-off events. [2024-06-20 17:32:09,128 INFO L125 PetriNetUnfolderBase]: For 742056/742060 co-relation queries the response was YES. [2024-06-20 17:32:09,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46349 conditions, 5344 events. 3382/5344 cut-off events. For 742056/742060 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 31922 event pairs, 703 based on Foata normal form. 8/5351 useless extension candidates. Maximal degree in co-relation 46201. Up to 4889 conditions per place. [2024-06-20 17:32:09,202 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 104 changer transitions 0/454 dead transitions. [2024-06-20 17:32:09,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 454 transitions, 7164 flow [2024-06-20 17:32:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 17:32:09,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 17:32:09,203 INFO L175 Difference]: Start difference. First operand has 315 places, 431 transitions, 5786 flow. Second operand 9 states and 150 transitions. [2024-06-20 17:32:09,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 454 transitions, 7164 flow [2024-06-20 17:32:12,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 454 transitions, 6866 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-20 17:32:12,171 INFO L231 Difference]: Finished difference. Result has 317 places, 438 transitions, 5967 flow [2024-06-20 17:32:12,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=317, PETRI_TRANSITIONS=438} [2024-06-20 17:32:12,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-20 17:32:12,171 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 438 transitions, 5967 flow [2024-06-20 17:32:12,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:12,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:12,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:12,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:32:12,172 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -119761551, now seen corresponding path program 4 times [2024-06-20 17:32:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:12,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649226516] [2024-06-20 17:32:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:13,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:13,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649226516] [2024-06-20 17:32:13,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649226516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:13,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:13,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:13,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254037375] [2024-06-20 17:32:13,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:13,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:13,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:13,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:13,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:13,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 438 transitions, 5967 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:13,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:13,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:13,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:14,370 INFO L124 PetriNetUnfolderBase]: 3377/5326 cut-off events. [2024-06-20 17:32:14,370 INFO L125 PetriNetUnfolderBase]: For 722113/722115 co-relation queries the response was YES. [2024-06-20 17:32:14,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45954 conditions, 5326 events. 3377/5326 cut-off events. For 722113/722115 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 31737 event pairs, 717 based on Foata normal form. 2/5328 useless extension candidates. Maximal degree in co-relation 45804. Up to 5080 conditions per place. [2024-06-20 17:32:14,451 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 416 selfloop transitions, 33 changer transitions 0/454 dead transitions. [2024-06-20 17:32:14,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 454 transitions, 6997 flow [2024-06-20 17:32:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:32:14,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:32:14,452 INFO L175 Difference]: Start difference. First operand has 317 places, 438 transitions, 5967 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:32:14,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 454 transitions, 6997 flow [2024-06-20 17:32:16,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 454 transitions, 6745 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:16,857 INFO L231 Difference]: Finished difference. Result has 320 places, 440 transitions, 5876 flow [2024-06-20 17:32:16,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5876, PETRI_PLACES=320, PETRI_TRANSITIONS=440} [2024-06-20 17:32:16,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-20 17:32:16,858 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 440 transitions, 5876 flow [2024-06-20 17:32:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:16,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:16,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:16,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:32:16,858 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:16,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1731210271, now seen corresponding path program 2 times [2024-06-20 17:32:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104490102] [2024-06-20 17:32:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:16,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:17,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:17,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104490102] [2024-06-20 17:32:17,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104490102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:17,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:17,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380229899] [2024-06-20 17:32:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:17,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:17,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:17,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 440 transitions, 5876 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:17,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:17,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:17,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:19,032 INFO L124 PetriNetUnfolderBase]: 3397/5354 cut-off events. [2024-06-20 17:32:19,033 INFO L125 PetriNetUnfolderBase]: For 742574/742576 co-relation queries the response was YES. [2024-06-20 17:32:19,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46091 conditions, 5354 events. 3397/5354 cut-off events. For 742574/742576 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31932 event pairs, 743 based on Foata normal form. 4/5357 useless extension candidates. Maximal degree in co-relation 45939. Up to 4564 conditions per place. [2024-06-20 17:32:19,112 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 310 selfloop transitions, 158 changer transitions 0/473 dead transitions. [2024-06-20 17:32:19,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 473 transitions, 7255 flow [2024-06-20 17:32:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 17:32:19,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 17:32:19,114 INFO L175 Difference]: Start difference. First operand has 320 places, 440 transitions, 5876 flow. Second operand 9 states and 156 transitions. [2024-06-20 17:32:19,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 473 transitions, 7255 flow [2024-06-20 17:32:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 473 transitions, 7110 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:21,794 INFO L231 Difference]: Finished difference. Result has 324 places, 454 transitions, 6286 flow [2024-06-20 17:32:21,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6286, PETRI_PLACES=324, PETRI_TRANSITIONS=454} [2024-06-20 17:32:21,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-20 17:32:21,795 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 454 transitions, 6286 flow [2024-06-20 17:32:21,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:21,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:21,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:21,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:32:21,796 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:21,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash -606147703, now seen corresponding path program 3 times [2024-06-20 17:32:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:21,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133990148] [2024-06-20 17:32:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:21,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:22,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133990148] [2024-06-20 17:32:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133990148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:22,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7711104] [2024-06-20 17:32:22,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:22,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:22,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:22,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 454 transitions, 6286 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:22,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:22,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:22,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:23,861 INFO L124 PetriNetUnfolderBase]: 3385/5340 cut-off events. [2024-06-20 17:32:23,861 INFO L125 PetriNetUnfolderBase]: For 735713/735715 co-relation queries the response was YES. [2024-06-20 17:32:23,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 5340 events. 3385/5340 cut-off events. For 735713/735715 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31832 event pairs, 741 based on Foata normal form. 4/5343 useless extension candidates. Maximal degree in co-relation 46062. Up to 4526 conditions per place. [2024-06-20 17:32:23,942 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 301 selfloop transitions, 166 changer transitions 0/472 dead transitions. [2024-06-20 17:32:23,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 472 transitions, 7489 flow [2024-06-20 17:32:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:32:23,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:32:23,943 INFO L175 Difference]: Start difference. First operand has 324 places, 454 transitions, 6286 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:32:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 472 transitions, 7489 flow [2024-06-20 17:32:27,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 472 transitions, 7108 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:27,089 INFO L231 Difference]: Finished difference. Result has 327 places, 455 transitions, 6285 flow [2024-06-20 17:32:27,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5905, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6285, PETRI_PLACES=327, PETRI_TRANSITIONS=455} [2024-06-20 17:32:27,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-20 17:32:27,089 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 455 transitions, 6285 flow [2024-06-20 17:32:27,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:27,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:27,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:32:27,099 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:27,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash -606140945, now seen corresponding path program 5 times [2024-06-20 17:32:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134154446] [2024-06-20 17:32:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134154446] [2024-06-20 17:32:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134154446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328081688] [2024-06-20 17:32:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:28,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:28,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 455 transitions, 6285 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:28,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:28,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:28,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:29,217 INFO L124 PetriNetUnfolderBase]: 3375/5321 cut-off events. [2024-06-20 17:32:29,218 INFO L125 PetriNetUnfolderBase]: For 729341/729345 co-relation queries the response was YES. [2024-06-20 17:32:29,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45765 conditions, 5321 events. 3375/5321 cut-off events. For 729341/729345 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 31706 event pairs, 713 based on Foata normal form. 8/5328 useless extension candidates. Maximal degree in co-relation 45609. Up to 4974 conditions per place. [2024-06-20 17:32:29,292 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 69 changer transitions 0/470 dead transitions. [2024-06-20 17:32:29,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 470 transitions, 7274 flow [2024-06-20 17:32:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:32:29,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:32:29,293 INFO L175 Difference]: Start difference. First operand has 327 places, 455 transitions, 6285 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:32:29,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 470 transitions, 7274 flow [2024-06-20 17:32:32,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 470 transitions, 6913 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:32,181 INFO L231 Difference]: Finished difference. Result has 331 places, 456 transitions, 6083 flow [2024-06-20 17:32:32,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6083, PETRI_PLACES=331, PETRI_TRANSITIONS=456} [2024-06-20 17:32:32,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 17:32:32,182 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 456 transitions, 6083 flow [2024-06-20 17:32:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:32,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:32,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:32,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:32:32,182 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:32,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash 684301465, now seen corresponding path program 1 times [2024-06-20 17:32:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369735070] [2024-06-20 17:32:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:32,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369735070] [2024-06-20 17:32:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369735070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:32,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:32,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413370030] [2024-06-20 17:32:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:32,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:32,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:32,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 456 transitions, 6083 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:32,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:32,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:32,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:33,989 INFO L124 PetriNetUnfolderBase]: 3380/5338 cut-off events. [2024-06-20 17:32:33,990 INFO L125 PetriNetUnfolderBase]: For 699015/699015 co-relation queries the response was YES. [2024-06-20 17:32:34,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45216 conditions, 5338 events. 3380/5338 cut-off events. For 699015/699015 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 31854 event pairs, 699 based on Foata normal form. 1/5339 useless extension candidates. Maximal degree in co-relation 45059. Up to 5075 conditions per place. [2024-06-20 17:32:34,066 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 28 changer transitions 0/485 dead transitions. [2024-06-20 17:32:34,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 485 transitions, 7226 flow [2024-06-20 17:32:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:32:34,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:32:34,068 INFO L175 Difference]: Start difference. First operand has 331 places, 456 transitions, 6083 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:32:34,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 485 transitions, 7226 flow [2024-06-20 17:32:36,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 485 transitions, 7078 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:32:36,736 INFO L231 Difference]: Finished difference. Result has 332 places, 459 transitions, 6087 flow [2024-06-20 17:32:36,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6087, PETRI_PLACES=332, PETRI_TRANSITIONS=459} [2024-06-20 17:32:36,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 17:32:36,737 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 459 transitions, 6087 flow [2024-06-20 17:32:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:36,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:36,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:36,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:32:36,737 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:36,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:36,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1608723041, now seen corresponding path program 2 times [2024-06-20 17:32:36,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:36,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561388685] [2024-06-20 17:32:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:36,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561388685] [2024-06-20 17:32:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561388685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:37,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:37,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:37,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069919732] [2024-06-20 17:32:37,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:37,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:37,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:37,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 459 transitions, 6087 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:37,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:37,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:37,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:38,698 INFO L124 PetriNetUnfolderBase]: 3390/5350 cut-off events. [2024-06-20 17:32:38,699 INFO L125 PetriNetUnfolderBase]: For 713165/713165 co-relation queries the response was YES. [2024-06-20 17:32:38,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45660 conditions, 5350 events. 3390/5350 cut-off events. For 713165/713165 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31944 event pairs, 699 based on Foata normal form. 1/5351 useless extension candidates. Maximal degree in co-relation 45502. Up to 5081 conditions per place. [2024-06-20 17:32:38,775 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 453 selfloop transitions, 34 changer transitions 0/492 dead transitions. [2024-06-20 17:32:38,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 492 transitions, 7279 flow [2024-06-20 17:32:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:32:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:32:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:32:38,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:32:38,777 INFO L175 Difference]: Start difference. First operand has 332 places, 459 transitions, 6087 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:32:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 492 transitions, 7279 flow [2024-06-20 17:32:41,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 492 transitions, 7153 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:41,814 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6173 flow [2024-06-20 17:32:41,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5961, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6173, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-20 17:32:41,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-20 17:32:41,814 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6173 flow [2024-06-20 17:32:41,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:41,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:41,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:41,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:32:41,815 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:41,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1617296897, now seen corresponding path program 1 times [2024-06-20 17:32:41,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:41,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600141249] [2024-06-20 17:32:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:42,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600141249] [2024-06-20 17:32:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600141249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:42,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:42,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:42,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459367999] [2024-06-20 17:32:42,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:42,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:42,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:42,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:42,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6173 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:42,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:42,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:42,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:43,719 INFO L124 PetriNetUnfolderBase]: 3385/5343 cut-off events. [2024-06-20 17:32:43,719 INFO L125 PetriNetUnfolderBase]: For 723454/723454 co-relation queries the response was YES. [2024-06-20 17:32:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45801 conditions, 5343 events. 3385/5343 cut-off events. For 723454/723454 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31885 event pairs, 589 based on Foata normal form. 2/5345 useless extension candidates. Maximal degree in co-relation 45641. Up to 5065 conditions per place. [2024-06-20 17:32:43,792 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 468 selfloop transitions, 21 changer transitions 0/494 dead transitions. [2024-06-20 17:32:43,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 494 transitions, 7307 flow [2024-06-20 17:32:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:32:43,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:32:43,794 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6173 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:32:43,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 494 transitions, 7307 flow [2024-06-20 17:32:46,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 494 transitions, 7168 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:46,342 INFO L231 Difference]: Finished difference. Result has 338 places, 467 transitions, 6141 flow [2024-06-20 17:32:46,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6034, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6141, PETRI_PLACES=338, PETRI_TRANSITIONS=467} [2024-06-20 17:32:46,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-20 17:32:46,343 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 467 transitions, 6141 flow [2024-06-20 17:32:46,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:46,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:46,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:32:46,344 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:46,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1608726017, now seen corresponding path program 2 times [2024-06-20 17:32:46,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:46,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069272511] [2024-06-20 17:32:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069272511] [2024-06-20 17:32:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069272511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:47,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622955477] [2024-06-20 17:32:47,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:47,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:47,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:47,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 467 transitions, 6141 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:47,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:47,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:47,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:48,373 INFO L124 PetriNetUnfolderBase]: 3393/5355 cut-off events. [2024-06-20 17:32:48,373 INFO L125 PetriNetUnfolderBase]: For 736429/736429 co-relation queries the response was YES. [2024-06-20 17:32:48,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46063 conditions, 5355 events. 3393/5355 cut-off events. For 736429/736429 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31951 event pairs, 703 based on Foata normal form. 2/5357 useless extension candidates. Maximal degree in co-relation 45902. Up to 5110 conditions per place. [2024-06-20 17:32:48,447 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 22 changer transitions 0/492 dead transitions. [2024-06-20 17:32:48,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 492 transitions, 7261 flow [2024-06-20 17:32:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:32:48,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:32:48,449 INFO L175 Difference]: Start difference. First operand has 338 places, 467 transitions, 6141 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:32:48,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 492 transitions, 7261 flow [2024-06-20 17:32:51,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 492 transitions, 7170 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:51,164 INFO L231 Difference]: Finished difference. Result has 340 places, 469 transitions, 6165 flow [2024-06-20 17:32:51,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6165, PETRI_PLACES=340, PETRI_TRANSITIONS=469} [2024-06-20 17:32:51,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 17:32:51,165 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 469 transitions, 6165 flow [2024-06-20 17:32:51,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:51,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:51,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:51,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:32:51,165 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:51,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:51,166 INFO L85 PathProgramCache]: Analyzing trace with hash -193634425, now seen corresponding path program 3 times [2024-06-20 17:32:51,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:51,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651002396] [2024-06-20 17:32:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:51,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651002396] [2024-06-20 17:32:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651002396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:51,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:51,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:51,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900291364] [2024-06-20 17:32:51,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:51,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:51,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 469 transitions, 6165 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:51,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:51,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:51,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:53,110 INFO L124 PetriNetUnfolderBase]: 3398/5365 cut-off events. [2024-06-20 17:32:53,111 INFO L125 PetriNetUnfolderBase]: For 743962/743966 co-relation queries the response was YES. [2024-06-20 17:32:53,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46294 conditions, 5365 events. 3398/5365 cut-off events. For 743962/743966 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32074 event pairs, 689 based on Foata normal form. 5/5370 useless extension candidates. Maximal degree in co-relation 46132. Up to 5036 conditions per place. [2024-06-20 17:32:53,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 447 selfloop transitions, 45 changer transitions 0/497 dead transitions. [2024-06-20 17:32:53,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 497 transitions, 7348 flow [2024-06-20 17:32:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:53,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:32:53,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:32:53,185 INFO L175 Difference]: Start difference. First operand has 340 places, 469 transitions, 6165 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:32:53,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 497 transitions, 7348 flow [2024-06-20 17:32:56,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 497 transitions, 7245 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 17:32:56,361 INFO L231 Difference]: Finished difference. Result has 342 places, 472 transitions, 6262 flow [2024-06-20 17:32:56,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6062, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6262, PETRI_PLACES=342, PETRI_TRANSITIONS=472} [2024-06-20 17:32:56,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-20 17:32:56,361 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 472 transitions, 6262 flow [2024-06-20 17:32:56,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:56,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:56,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:32:56,362 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:32:56,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash -183158905, now seen corresponding path program 4 times [2024-06-20 17:32:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:56,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158573355] [2024-06-20 17:32:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:56,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:57,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158573355] [2024-06-20 17:32:57,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158573355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:57,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:57,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850880626] [2024-06-20 17:32:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:57,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:32:57,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 472 transitions, 6262 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:57,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:57,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:32:57,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:58,285 INFO L124 PetriNetUnfolderBase]: 3403/5374 cut-off events. [2024-06-20 17:32:58,285 INFO L125 PetriNetUnfolderBase]: For 761763/761767 co-relation queries the response was YES. [2024-06-20 17:32:58,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46817 conditions, 5374 events. 3403/5374 cut-off events. For 761763/761767 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32175 event pairs, 689 based on Foata normal form. 5/5379 useless extension candidates. Maximal degree in co-relation 46654. Up to 5026 conditions per place. [2024-06-20 17:32:58,360 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 441 selfloop transitions, 51 changer transitions 0/497 dead transitions. [2024-06-20 17:32:58,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 497 transitions, 7437 flow [2024-06-20 17:32:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:32:58,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:32:58,361 INFO L175 Difference]: Start difference. First operand has 342 places, 472 transitions, 6262 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:32:58,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 497 transitions, 7437 flow [2024-06-20 17:33:01,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 497 transitions, 7259 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:01,437 INFO L231 Difference]: Finished difference. Result has 344 places, 475 transitions, 6302 flow [2024-06-20 17:33:01,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6302, PETRI_PLACES=344, PETRI_TRANSITIONS=475} [2024-06-20 17:33:01,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-20 17:33:01,438 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 475 transitions, 6302 flow [2024-06-20 17:33:01,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:01,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:01,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:01,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:33:01,438 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:01,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:01,439 INFO L85 PathProgramCache]: Analyzing trace with hash -126921313, now seen corresponding path program 5 times [2024-06-20 17:33:01,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:01,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590303133] [2024-06-20 17:33:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:01,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:02,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:02,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590303133] [2024-06-20 17:33:02,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590303133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:02,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:02,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:02,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724430110] [2024-06-20 17:33:02,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:02,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:02,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:02,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 475 transitions, 6302 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:02,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:02,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:02,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:03,336 INFO L124 PetriNetUnfolderBase]: 3424/5403 cut-off events. [2024-06-20 17:33:03,336 INFO L125 PetriNetUnfolderBase]: For 790369/790373 co-relation queries the response was YES. [2024-06-20 17:33:03,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47856 conditions, 5403 events. 3424/5403 cut-off events. For 790369/790373 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32291 event pairs, 691 based on Foata normal form. 5/5408 useless extension candidates. Maximal degree in co-relation 47692. Up to 5018 conditions per place. [2024-06-20 17:33:03,412 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 71 changer transitions 0/504 dead transitions. [2024-06-20 17:33:03,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 504 transitions, 8121 flow [2024-06-20 17:33:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:33:03,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:33:03,414 INFO L175 Difference]: Start difference. First operand has 344 places, 475 transitions, 6302 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:33:03,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 504 transitions, 8121 flow [2024-06-20 17:33:06,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 504 transitions, 7925 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:06,875 INFO L231 Difference]: Finished difference. Result has 346 places, 484 transitions, 6590 flow [2024-06-20 17:33:06,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6590, PETRI_PLACES=346, PETRI_TRANSITIONS=484} [2024-06-20 17:33:06,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 17:33:06,876 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 484 transitions, 6590 flow [2024-06-20 17:33:06,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:06,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:06,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:06,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:33:06,877 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:06,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -131682913, now seen corresponding path program 6 times [2024-06-20 17:33:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292763669] [2024-06-20 17:33:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:06,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:07,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292763669] [2024-06-20 17:33:07,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292763669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:07,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:07,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:07,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525873658] [2024-06-20 17:33:07,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:07,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:07,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:07,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:07,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 484 transitions, 6590 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:07,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:07,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:07,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:08,884 INFO L124 PetriNetUnfolderBase]: 3421/5399 cut-off events. [2024-06-20 17:33:08,884 INFO L125 PetriNetUnfolderBase]: For 801731/801731 co-relation queries the response was YES. [2024-06-20 17:33:08,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48067 conditions, 5399 events. 3421/5399 cut-off events. For 801731/801731 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32273 event pairs, 697 based on Foata normal form. 1/5400 useless extension candidates. Maximal degree in co-relation 47902. Up to 5144 conditions per place. [2024-06-20 17:33:08,963 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 469 selfloop transitions, 27 changer transitions 0/501 dead transitions. [2024-06-20 17:33:08,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 501 transitions, 7644 flow [2024-06-20 17:33:08,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:33:08,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:33:08,964 INFO L175 Difference]: Start difference. First operand has 346 places, 484 transitions, 6590 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:33:08,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 501 transitions, 7644 flow [2024-06-20 17:33:12,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 501 transitions, 7398 flow, removed 104 selfloop flow, removed 3 redundant places. [2024-06-20 17:33:12,368 INFO L231 Difference]: Finished difference. Result has 351 places, 484 transitions, 6404 flow [2024-06-20 17:33:12,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6404, PETRI_PLACES=351, PETRI_TRANSITIONS=484} [2024-06-20 17:33:12,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-20 17:33:12,369 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 484 transitions, 6404 flow [2024-06-20 17:33:12,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:12,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:12,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:12,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:33:12,369 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:12,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1008186343, now seen corresponding path program 3 times [2024-06-20 17:33:12,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:12,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256549527] [2024-06-20 17:33:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:13,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:13,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256549527] [2024-06-20 17:33:13,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256549527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:13,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:13,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346206637] [2024-06-20 17:33:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:13,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:13,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:13,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 484 transitions, 6404 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:13,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:13,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:13,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:14,385 INFO L124 PetriNetUnfolderBase]: 3416/5392 cut-off events. [2024-06-20 17:33:14,385 INFO L125 PetriNetUnfolderBase]: For 807914/807914 co-relation queries the response was YES. [2024-06-20 17:33:14,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47766 conditions, 5392 events. 3416/5392 cut-off events. For 807914/807914 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32245 event pairs, 698 based on Foata normal form. 2/5394 useless extension candidates. Maximal degree in co-relation 47599. Up to 5134 conditions per place. [2024-06-20 17:33:14,462 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 473 selfloop transitions, 26 changer transitions 0/504 dead transitions. [2024-06-20 17:33:14,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 504 transitions, 7538 flow [2024-06-20 17:33:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:33:14,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:33:14,463 INFO L175 Difference]: Start difference. First operand has 351 places, 484 transitions, 6404 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:33:14,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 504 transitions, 7538 flow [2024-06-20 17:33:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 504 transitions, 7439 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:33:17,605 INFO L231 Difference]: Finished difference. Result has 352 places, 486 transitions, 6438 flow [2024-06-20 17:33:17,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6305, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6438, PETRI_PLACES=352, PETRI_TRANSITIONS=486} [2024-06-20 17:33:17,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-20 17:33:17,606 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 486 transitions, 6438 flow [2024-06-20 17:33:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:17,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:17,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:17,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:33:17,606 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:17,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash 606649431, now seen corresponding path program 1 times [2024-06-20 17:33:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:17,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870758068] [2024-06-20 17:33:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:17,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:18,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:18,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870758068] [2024-06-20 17:33:18,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870758068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:18,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:18,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:18,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134810692] [2024-06-20 17:33:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:18,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:18,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:18,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:18,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 486 transitions, 6438 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:18,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:18,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:18,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:19,844 INFO L124 PetriNetUnfolderBase]: 3413/5389 cut-off events. [2024-06-20 17:33:19,844 INFO L125 PetriNetUnfolderBase]: For 810147/810149 co-relation queries the response was YES. [2024-06-20 17:33:19,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47795 conditions, 5389 events. 3413/5389 cut-off events. For 810147/810149 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 32259 event pairs, 708 based on Foata normal form. 1/5390 useless extension candidates. Maximal degree in co-relation 47628. Up to 4996 conditions per place. [2024-06-20 17:33:19,924 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 436 selfloop transitions, 70 changer transitions 0/511 dead transitions. [2024-06-20 17:33:19,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 511 transitions, 7550 flow [2024-06-20 17:33:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 17:33:19,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:33:19,925 INFO L175 Difference]: Start difference. First operand has 352 places, 486 transitions, 6438 flow. Second operand 8 states and 144 transitions. [2024-06-20 17:33:19,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 511 transitions, 7550 flow [2024-06-20 17:33:22,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 511 transitions, 7415 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:22,851 INFO L231 Difference]: Finished difference. Result has 354 places, 486 transitions, 6457 flow [2024-06-20 17:33:22,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6457, PETRI_PLACES=354, PETRI_TRANSITIONS=486} [2024-06-20 17:33:22,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 17:33:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 486 transitions, 6457 flow [2024-06-20 17:33:22,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:22,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:22,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:33:22,852 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:22,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash -280565921, now seen corresponding path program 7 times [2024-06-20 17:33:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339912052] [2024-06-20 17:33:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:23,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:23,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339912052] [2024-06-20 17:33:23,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339912052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:23,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:23,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:23,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849751214] [2024-06-20 17:33:23,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:23,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:23,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:23,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:23,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:23,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:23,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 486 transitions, 6457 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:23,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:23,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:23,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:24,826 INFO L124 PetriNetUnfolderBase]: 3418/5396 cut-off events. [2024-06-20 17:33:24,826 INFO L125 PetriNetUnfolderBase]: For 824261/824261 co-relation queries the response was YES. [2024-06-20 17:33:24,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48058 conditions, 5396 events. 3418/5396 cut-off events. For 824261/824261 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32337 event pairs, 679 based on Foata normal form. 1/5394 useless extension candidates. Maximal degree in co-relation 47890. Up to 5064 conditions per place. [2024-06-20 17:33:24,908 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 463 selfloop transitions, 44 changer transitions 0/512 dead transitions. [2024-06-20 17:33:24,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 512 transitions, 7664 flow [2024-06-20 17:33:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:33:24,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:33:24,909 INFO L175 Difference]: Start difference. First operand has 354 places, 486 transitions, 6457 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:33:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 512 transitions, 7664 flow [2024-06-20 17:33:28,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 512 transitions, 7510 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 17:33:28,942 INFO L231 Difference]: Finished difference. Result has 354 places, 489 transitions, 6503 flow [2024-06-20 17:33:28,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6503, PETRI_PLACES=354, PETRI_TRANSITIONS=489} [2024-06-20 17:33:28,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-20 17:33:28,943 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 489 transitions, 6503 flow [2024-06-20 17:33:28,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:28,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:28,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:33:28,943 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:28,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:28,943 INFO L85 PathProgramCache]: Analyzing trace with hash 401464735, now seen corresponding path program 8 times [2024-06-20 17:33:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028494158] [2024-06-20 17:33:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:29,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028494158] [2024-06-20 17:33:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028494158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:29,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315949487] [2024-06-20 17:33:29,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:29,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:29,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:29,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 489 transitions, 6503 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:29,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:29,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:29,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:30,882 INFO L124 PetriNetUnfolderBase]: 3415/5387 cut-off events. [2024-06-20 17:33:30,882 INFO L125 PetriNetUnfolderBase]: For 817893/817893 co-relation queries the response was YES. [2024-06-20 17:33:30,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47808 conditions, 5387 events. 3415/5387 cut-off events. For 817893/817893 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32183 event pairs, 689 based on Foata normal form. 1/5385 useless extension candidates. Maximal degree in co-relation 47640. Up to 5052 conditions per place. [2024-06-20 17:33:30,967 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 457 selfloop transitions, 48 changer transitions 0/510 dead transitions. [2024-06-20 17:33:30,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 510 transitions, 7600 flow [2024-06-20 17:33:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:33:30,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:33:30,968 INFO L175 Difference]: Start difference. First operand has 354 places, 489 transitions, 6503 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:33:30,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 510 transitions, 7600 flow [2024-06-20 17:33:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 510 transitions, 7374 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:34,993 INFO L231 Difference]: Finished difference. Result has 356 places, 489 transitions, 6379 flow [2024-06-20 17:33:34,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6379, PETRI_PLACES=356, PETRI_TRANSITIONS=489} [2024-06-20 17:33:34,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-20 17:33:34,994 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 489 transitions, 6379 flow [2024-06-20 17:33:34,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:34,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:34,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:34,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:33:34,995 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:34,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -586103393, now seen corresponding path program 9 times [2024-06-20 17:33:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:34,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020644742] [2024-06-20 17:33:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:35,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:35,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020644742] [2024-06-20 17:33:35,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020644742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:35,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:35,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:35,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301081366] [2024-06-20 17:33:35,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:35,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:35,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 489 transitions, 6379 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:35,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:35,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:35,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:36,966 INFO L124 PetriNetUnfolderBase]: 3433/5414 cut-off events. [2024-06-20 17:33:36,966 INFO L125 PetriNetUnfolderBase]: For 844583/844583 co-relation queries the response was YES. [2024-06-20 17:33:37,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48274 conditions, 5414 events. 3433/5414 cut-off events. For 844583/844583 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32426 event pairs, 686 based on Foata normal form. 2/5413 useless extension candidates. Maximal degree in co-relation 48105. Up to 5016 conditions per place. [2024-06-20 17:33:37,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 443 selfloop transitions, 66 changer transitions 0/514 dead transitions. [2024-06-20 17:33:37,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 514 transitions, 7898 flow [2024-06-20 17:33:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 17:33:37,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-20 17:33:37,051 INFO L175 Difference]: Start difference. First operand has 356 places, 489 transitions, 6379 flow. Second operand 8 states and 137 transitions. [2024-06-20 17:33:37,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 514 transitions, 7898 flow [2024-06-20 17:33:41,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 514 transitions, 7725 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 17:33:41,140 INFO L231 Difference]: Finished difference. Result has 357 places, 496 transitions, 6565 flow [2024-06-20 17:33:41,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6206, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6565, PETRI_PLACES=357, PETRI_TRANSITIONS=496} [2024-06-20 17:33:41,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 17:33:41,141 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 496 transitions, 6565 flow [2024-06-20 17:33:41,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:41,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:41,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:41,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:33:41,141 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:41,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 558864553, now seen corresponding path program 10 times [2024-06-20 17:33:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:41,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861449215] [2024-06-20 17:33:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:41,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861449215] [2024-06-20 17:33:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861449215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:41,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:41,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850585932] [2024-06-20 17:33:41,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:41,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:41,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:41,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:41,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:41,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 496 transitions, 6565 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:41,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:41,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:41,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:43,123 INFO L124 PetriNetUnfolderBase]: 3467/5470 cut-off events. [2024-06-20 17:33:43,124 INFO L125 PetriNetUnfolderBase]: For 884845/884849 co-relation queries the response was YES. [2024-06-20 17:33:43,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49826 conditions, 5470 events. 3467/5470 cut-off events. For 884845/884849 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32841 event pairs, 714 based on Foata normal form. 6/5473 useless extension candidates. Maximal degree in co-relation 49656. Up to 4929 conditions per place. [2024-06-20 17:33:43,209 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 411 selfloop transitions, 111 changer transitions 0/527 dead transitions. [2024-06-20 17:33:43,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 527 transitions, 8830 flow [2024-06-20 17:33:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:33:43,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:33:43,211 INFO L175 Difference]: Start difference. First operand has 357 places, 496 transitions, 6565 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:33:43,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 527 transitions, 8830 flow [2024-06-20 17:33:47,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 527 transitions, 8640 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-20 17:33:47,847 INFO L231 Difference]: Finished difference. Result has 361 places, 511 transitions, 7114 flow [2024-06-20 17:33:47,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7114, PETRI_PLACES=361, PETRI_TRANSITIONS=511} [2024-06-20 17:33:47,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-20 17:33:47,847 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 511 transitions, 7114 flow [2024-06-20 17:33:47,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:47,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:47,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:47,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:33:47,848 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:47,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:47,848 INFO L85 PathProgramCache]: Analyzing trace with hash 3118495, now seen corresponding path program 11 times [2024-06-20 17:33:47,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:47,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276404127] [2024-06-20 17:33:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:47,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:48,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:48,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276404127] [2024-06-20 17:33:48,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276404127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:48,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:48,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549456438] [2024-06-20 17:33:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:48,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:48,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:48,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 511 transitions, 7114 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:48,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:48,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:48,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:49,914 INFO L124 PetriNetUnfolderBase]: 3461/5465 cut-off events. [2024-06-20 17:33:49,914 INFO L125 PetriNetUnfolderBase]: For 889571/889571 co-relation queries the response was YES. [2024-06-20 17:33:49,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50072 conditions, 5465 events. 3461/5465 cut-off events. For 889571/889571 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32821 event pairs, 706 based on Foata normal form. 2/5464 useless extension candidates. Maximal degree in co-relation 49900. Up to 5165 conditions per place. [2024-06-20 17:33:49,999 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 39 changer transitions 0/523 dead transitions. [2024-06-20 17:33:50,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 523 transitions, 8192 flow [2024-06-20 17:33:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 17:33:50,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 17:33:50,001 INFO L175 Difference]: Start difference. First operand has 361 places, 511 transitions, 7114 flow. Second operand 8 states and 132 transitions. [2024-06-20 17:33:50,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 523 transitions, 8192 flow [2024-06-20 17:33:54,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 523 transitions, 7870 flow, removed 144 selfloop flow, removed 2 redundant places. [2024-06-20 17:33:54,195 INFO L231 Difference]: Finished difference. Result has 367 places, 511 transitions, 6877 flow [2024-06-20 17:33:54,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6792, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6877, PETRI_PLACES=367, PETRI_TRANSITIONS=511} [2024-06-20 17:33:54,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 17:33:54,196 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 511 transitions, 6877 flow [2024-06-20 17:33:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:54,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:54,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:54,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:33:54,197 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:54,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1624813399, now seen corresponding path program 12 times [2024-06-20 17:33:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960512119] [2024-06-20 17:33:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:54,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:54,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:54,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960512119] [2024-06-20 17:33:54,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960512119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:54,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:54,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:54,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624643048] [2024-06-20 17:33:54,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:54,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:54,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:54,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:33:54,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 511 transitions, 6877 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:54,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:54,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:33:54,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:56,144 INFO L124 PetriNetUnfolderBase]: 3455/5452 cut-off events. [2024-06-20 17:33:56,144 INFO L125 PetriNetUnfolderBase]: For 878857/878861 co-relation queries the response was YES. [2024-06-20 17:33:56,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48883 conditions, 5452 events. 3455/5452 cut-off events. For 878857/878861 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32716 event pairs, 714 based on Foata normal form. 6/5455 useless extension candidates. Maximal degree in co-relation 48709. Up to 4919 conditions per place. [2024-06-20 17:33:56,229 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 415 selfloop transitions, 106 changer transitions 0/526 dead transitions. [2024-06-20 17:33:56,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 526 transitions, 8422 flow [2024-06-20 17:33:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:33:56,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:33:56,231 INFO L175 Difference]: Start difference. First operand has 367 places, 511 transitions, 6877 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:33:56,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 526 transitions, 8422 flow [2024-06-20 17:33:59,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 526 transitions, 8195 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-20 17:33:59,205 INFO L231 Difference]: Finished difference. Result has 367 places, 511 transitions, 6869 flow [2024-06-20 17:33:59,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6869, PETRI_PLACES=367, PETRI_TRANSITIONS=511} [2024-06-20 17:33:59,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 17:33:59,207 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 511 transitions, 6869 flow [2024-06-20 17:33:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:59,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:59,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:33:59,211 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:33:59,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash -912225029, now seen corresponding path program 2 times [2024-06-20 17:33:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243503206] [2024-06-20 17:33:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:59,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243503206] [2024-06-20 17:34:00,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243503206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:00,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:00,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:00,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456515260] [2024-06-20 17:34:00,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:00,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:00,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:00,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:00,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:00,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:00,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 511 transitions, 6869 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:00,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:00,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:00,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:01,418 INFO L124 PetriNetUnfolderBase]: 3460/5467 cut-off events. [2024-06-20 17:34:01,418 INFO L125 PetriNetUnfolderBase]: For 885963/885963 co-relation queries the response was YES. [2024-06-20 17:34:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49095 conditions, 5467 events. 3460/5467 cut-off events. For 885963/885963 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32904 event pairs, 698 based on Foata normal form. 1/5467 useless extension candidates. Maximal degree in co-relation 48921. Up to 5066 conditions per place. [2024-06-20 17:34:01,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 461 selfloop transitions, 71 changer transitions 0/537 dead transitions. [2024-06-20 17:34:01,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 537 transitions, 8090 flow [2024-06-20 17:34:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:34:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:34:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:34:01,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:34:01,503 INFO L175 Difference]: Start difference. First operand has 367 places, 511 transitions, 6869 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:34:01,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 537 transitions, 8090 flow [2024-06-20 17:34:04,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 537 transitions, 7728 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-20 17:34:04,590 INFO L231 Difference]: Finished difference. Result has 366 places, 514 transitions, 6732 flow [2024-06-20 17:34:04,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6732, PETRI_PLACES=366, PETRI_TRANSITIONS=514} [2024-06-20 17:34:04,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-20 17:34:04,591 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 514 transitions, 6732 flow [2024-06-20 17:34:04,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:04,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:04,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:04,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:34:04,591 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:04,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1890300265, now seen corresponding path program 3 times [2024-06-20 17:34:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941868981] [2024-06-20 17:34:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941868981] [2024-06-20 17:34:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941868981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:05,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:05,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:05,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340725860] [2024-06-20 17:34:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:05,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:05,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:05,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:05,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:05,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 514 transitions, 6732 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:05,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:05,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:05,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:06,793 INFO L124 PetriNetUnfolderBase]: 3457/5466 cut-off events. [2024-06-20 17:34:06,793 INFO L125 PetriNetUnfolderBase]: For 893858/893858 co-relation queries the response was YES. [2024-06-20 17:34:06,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48691 conditions, 5466 events. 3457/5466 cut-off events. For 893858/893858 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32927 event pairs, 704 based on Foata normal form. 1/5466 useless extension candidates. Maximal degree in co-relation 48519. Up to 5062 conditions per place. [2024-06-20 17:34:06,878 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 69 changer transitions 0/536 dead transitions. [2024-06-20 17:34:06,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 536 transitions, 7878 flow [2024-06-20 17:34:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:34:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:34:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:34:06,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 17:34:06,879 INFO L175 Difference]: Start difference. First operand has 366 places, 514 transitions, 6732 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:34:06,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 536 transitions, 7878 flow [2024-06-20 17:34:10,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 536 transitions, 7699 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:10,074 INFO L231 Difference]: Finished difference. Result has 367 places, 514 transitions, 6703 flow [2024-06-20 17:34:10,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6703, PETRI_PLACES=367, PETRI_TRANSITIONS=514} [2024-06-20 17:34:10,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 17:34:10,074 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 514 transitions, 6703 flow [2024-06-20 17:34:10,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:10,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:10,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:10,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:34:10,075 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:10,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:10,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1580683595, now seen corresponding path program 4 times [2024-06-20 17:34:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:10,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816260569] [2024-06-20 17:34:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:10,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:10,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816260569] [2024-06-20 17:34:10,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816260569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:10,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:10,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:10,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320308172] [2024-06-20 17:34:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:10,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:10,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:11,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:11,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 514 transitions, 6703 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:11,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:11,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:11,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:12,319 INFO L124 PetriNetUnfolderBase]: 3447/5456 cut-off events. [2024-06-20 17:34:12,320 INFO L125 PetriNetUnfolderBase]: For 887059/887059 co-relation queries the response was YES. [2024-06-20 17:34:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48293 conditions, 5456 events. 3447/5456 cut-off events. For 887059/887059 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32910 event pairs, 683 based on Foata normal form. 2/5457 useless extension candidates. Maximal degree in co-relation 48121. Up to 4947 conditions per place. [2024-06-20 17:34:12,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 435 selfloop transitions, 95 changer transitions 0/535 dead transitions. [2024-06-20 17:34:12,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 535 transitions, 7847 flow [2024-06-20 17:34:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:34:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:34:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 17:34:12,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 17:34:12,405 INFO L175 Difference]: Start difference. First operand has 367 places, 514 transitions, 6703 flow. Second operand 8 states and 139 transitions. [2024-06-20 17:34:12,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 535 transitions, 7847 flow [2024-06-20 17:34:15,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 535 transitions, 7665 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:34:15,657 INFO L231 Difference]: Finished difference. Result has 367 places, 514 transitions, 6725 flow [2024-06-20 17:34:15,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6725, PETRI_PLACES=367, PETRI_TRANSITIONS=514} [2024-06-20 17:34:15,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 17:34:15,658 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 514 transitions, 6725 flow [2024-06-20 17:34:15,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:15,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:15,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:15,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:34:15,659 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:15,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -571805697, now seen corresponding path program 1 times [2024-06-20 17:34:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:15,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096466907] [2024-06-20 17:34:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:16,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:16,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096466907] [2024-06-20 17:34:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096466907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:16,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:16,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:16,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852530415] [2024-06-20 17:34:16,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:16,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:16,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 514 transitions, 6725 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:16,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:16,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:16,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:17,898 INFO L124 PetriNetUnfolderBase]: 3440/5441 cut-off events. [2024-06-20 17:34:17,898 INFO L125 PetriNetUnfolderBase]: For 873763/873763 co-relation queries the response was YES. [2024-06-20 17:34:17,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48162 conditions, 5441 events. 3440/5441 cut-off events. For 873763/873763 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 32715 event pairs, 697 based on Foata normal form. 1/5441 useless extension candidates. Maximal degree in co-relation 47990. Up to 5131 conditions per place. [2024-06-20 17:34:17,984 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 482 selfloop transitions, 46 changer transitions 0/533 dead transitions. [2024-06-20 17:34:17,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 533 transitions, 7881 flow [2024-06-20 17:34:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 17:34:17,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-20 17:34:17,986 INFO L175 Difference]: Start difference. First operand has 367 places, 514 transitions, 6725 flow. Second operand 9 states and 146 transitions. [2024-06-20 17:34:17,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 533 transitions, 7881 flow [2024-06-20 17:34:21,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 533 transitions, 7643 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:34:21,289 INFO L231 Difference]: Finished difference. Result has 368 places, 516 transitions, 6626 flow [2024-06-20 17:34:21,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6487, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6626, PETRI_PLACES=368, PETRI_TRANSITIONS=516} [2024-06-20 17:34:21,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 17:34:21,289 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 516 transitions, 6626 flow [2024-06-20 17:34:21,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:21,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:21,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:21,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:34:21,291 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:21,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2133467135, now seen corresponding path program 2 times [2024-06-20 17:34:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:21,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136531602] [2024-06-20 17:34:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:21,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136531602] [2024-06-20 17:34:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136531602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:22,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400870945] [2024-06-20 17:34:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:22,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:22,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 516 transitions, 6626 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:22,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:22,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:22,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:23,654 INFO L124 PetriNetUnfolderBase]: 3453/5457 cut-off events. [2024-06-20 17:34:23,654 INFO L125 PetriNetUnfolderBase]: For 880448/880452 co-relation queries the response was YES. [2024-06-20 17:34:23,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48228 conditions, 5457 events. 3453/5457 cut-off events. For 880448/880452 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32828 event pairs, 708 based on Foata normal form. 5/5461 useless extension candidates. Maximal degree in co-relation 48056. Up to 5079 conditions per place. [2024-06-20 17:34:23,727 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 456 selfloop transitions, 75 changer transitions 0/536 dead transitions. [2024-06-20 17:34:23,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 536 transitions, 8068 flow [2024-06-20 17:34:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 17:34:23,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-20 17:34:23,728 INFO L175 Difference]: Start difference. First operand has 368 places, 516 transitions, 6626 flow. Second operand 9 states and 147 transitions. [2024-06-20 17:34:23,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 536 transitions, 8068 flow [2024-06-20 17:34:26,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 536 transitions, 7953 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:26,610 INFO L231 Difference]: Finished difference. Result has 371 places, 522 transitions, 6799 flow [2024-06-20 17:34:26,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6511, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6799, PETRI_PLACES=371, PETRI_TRANSITIONS=522} [2024-06-20 17:34:26,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-20 17:34:26,610 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 522 transitions, 6799 flow [2024-06-20 17:34:26,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:26,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:26,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:26,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:34:26,611 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:26,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:26,611 INFO L85 PathProgramCache]: Analyzing trace with hash 615618033, now seen corresponding path program 3 times [2024-06-20 17:34:26,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:26,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338570616] [2024-06-20 17:34:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:26,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:27,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:27,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338570616] [2024-06-20 17:34:27,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338570616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:27,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:27,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844127615] [2024-06-20 17:34:27,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:27,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:27,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:27,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:27,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 522 transitions, 6799 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:27,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:27,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:27,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:28,767 INFO L124 PetriNetUnfolderBase]: 3446/5444 cut-off events. [2024-06-20 17:34:28,768 INFO L125 PetriNetUnfolderBase]: For 889077/889079 co-relation queries the response was YES. [2024-06-20 17:34:28,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48299 conditions, 5444 events. 3446/5444 cut-off events. For 889077/889079 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 32731 event pairs, 734 based on Foata normal form. 1/5444 useless extension candidates. Maximal degree in co-relation 48125. Up to 4446 conditions per place. [2024-06-20 17:34:28,842 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 197 changer transitions 0/542 dead transitions. [2024-06-20 17:34:28,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 542 transitions, 8459 flow [2024-06-20 17:34:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:34:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:34:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:34:28,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:34:28,843 INFO L175 Difference]: Start difference. First operand has 371 places, 522 transitions, 6799 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:34:28,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 542 transitions, 8459 flow [2024-06-20 17:34:31,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 542 transitions, 8299 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:34:31,616 INFO L231 Difference]: Finished difference. Result has 373 places, 526 transitions, 7105 flow [2024-06-20 17:34:31,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7105, PETRI_PLACES=373, PETRI_TRANSITIONS=526} [2024-06-20 17:34:31,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 17:34:31,616 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 526 transitions, 7105 flow [2024-06-20 17:34:31,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:31,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:31,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:31,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:34:31,617 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:31,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:31,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1409286921, now seen corresponding path program 4 times [2024-06-20 17:34:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508527204] [2024-06-20 17:34:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508527204] [2024-06-20 17:34:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508527204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018255899] [2024-06-20 17:34:32,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:32,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:32,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 526 transitions, 7105 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:32,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:32,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:32,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:33,929 INFO L124 PetriNetUnfolderBase]: 3436/5440 cut-off events. [2024-06-20 17:34:33,929 INFO L125 PetriNetUnfolderBase]: For 897884/897888 co-relation queries the response was YES. [2024-06-20 17:34:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48558 conditions, 5440 events. 3436/5440 cut-off events. For 897884/897888 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32770 event pairs, 698 based on Foata normal form. 6/5445 useless extension candidates. Maximal degree in co-relation 48383. Up to 5019 conditions per place. [2024-06-20 17:34:34,011 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 104 changer transitions 0/540 dead transitions. [2024-06-20 17:34:34,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 540 transitions, 8221 flow [2024-06-20 17:34:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:34:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:34:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 17:34:34,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-20 17:34:34,013 INFO L175 Difference]: Start difference. First operand has 373 places, 526 transitions, 7105 flow. Second operand 10 states and 161 transitions. [2024-06-20 17:34:34,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 540 transitions, 8221 flow [2024-06-20 17:34:37,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 540 transitions, 7803 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:34:37,835 INFO L231 Difference]: Finished difference. Result has 378 places, 526 transitions, 6906 flow [2024-06-20 17:34:37,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6687, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6906, PETRI_PLACES=378, PETRI_TRANSITIONS=526} [2024-06-20 17:34:37,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 17:34:37,835 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 526 transitions, 6906 flow [2024-06-20 17:34:37,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:37,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:37,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:37,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:34:37,836 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:37,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1027188494, now seen corresponding path program 1 times [2024-06-20 17:34:37,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:37,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988203433] [2024-06-20 17:34:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:37,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:38,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:38,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988203433] [2024-06-20 17:34:38,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988203433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:38,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:38,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:38,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905929717] [2024-06-20 17:34:38,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:38,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:38,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 526 transitions, 6906 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:38,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:38,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:38,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:40,110 INFO L124 PetriNetUnfolderBase]: 3481/5511 cut-off events. [2024-06-20 17:34:40,110 INFO L125 PetriNetUnfolderBase]: For 950970/950970 co-relation queries the response was YES. [2024-06-20 17:34:40,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49394 conditions, 5511 events. 3481/5511 cut-off events. For 950970/950970 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33344 event pairs, 603 based on Foata normal form. 4/5514 useless extension candidates. Maximal degree in co-relation 49219. Up to 4938 conditions per place. [2024-06-20 17:34:40,195 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 79 changer transitions 0/559 dead transitions. [2024-06-20 17:34:40,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 8526 flow [2024-06-20 17:34:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 17:34:40,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 17:34:40,196 INFO L175 Difference]: Start difference. First operand has 378 places, 526 transitions, 6906 flow. Second operand 9 states and 155 transitions. [2024-06-20 17:34:40,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 8526 flow [2024-06-20 17:34:43,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 559 transitions, 8260 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:34:43,506 INFO L231 Difference]: Finished difference. Result has 380 places, 532 transitions, 6999 flow [2024-06-20 17:34:43,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6640, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6999, PETRI_PLACES=380, PETRI_TRANSITIONS=532} [2024-06-20 17:34:43,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-20 17:34:43,507 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 532 transitions, 6999 flow [2024-06-20 17:34:43,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:43,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:43,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:43,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:34:43,508 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:43,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1580668870, now seen corresponding path program 2 times [2024-06-20 17:34:43,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:43,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598753415] [2024-06-20 17:34:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:43,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:44,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:44,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598753415] [2024-06-20 17:34:44,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598753415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:44,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:44,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:44,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808806199] [2024-06-20 17:34:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:44,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:44,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 532 transitions, 6999 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:44,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:44,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:44,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:46,032 INFO L124 PetriNetUnfolderBase]: 3497/5531 cut-off events. [2024-06-20 17:34:46,032 INFO L125 PetriNetUnfolderBase]: For 969912/969912 co-relation queries the response was YES. [2024-06-20 17:34:46,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49998 conditions, 5531 events. 3497/5531 cut-off events. For 969912/969912 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33393 event pairs, 688 based on Foata normal form. 4/5534 useless extension candidates. Maximal degree in co-relation 49821. Up to 5006 conditions per place. [2024-06-20 17:34:46,129 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 449 selfloop transitions, 104 changer transitions 0/558 dead transitions. [2024-06-20 17:34:46,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 558 transitions, 8293 flow [2024-06-20 17:34:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 17:34:46,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:34:46,131 INFO L175 Difference]: Start difference. First operand has 380 places, 532 transitions, 6999 flow. Second operand 9 states and 153 transitions. [2024-06-20 17:34:46,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 558 transitions, 8293 flow [2024-06-20 17:34:50,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 558 transitions, 8027 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-20 17:34:50,383 INFO L231 Difference]: Finished difference. Result has 383 places, 535 transitions, 7054 flow [2024-06-20 17:34:50,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7054, PETRI_PLACES=383, PETRI_TRANSITIONS=535} [2024-06-20 17:34:50,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-20 17:34:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 535 transitions, 7054 flow [2024-06-20 17:34:50,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:50,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:50,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:34:50,384 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash 56734652, now seen corresponding path program 3 times [2024-06-20 17:34:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:50,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536721520] [2024-06-20 17:34:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:51,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:51,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536721520] [2024-06-20 17:34:51,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536721520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:51,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:51,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:34:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967482349] [2024-06-20 17:34:51,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:51,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:34:51,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:34:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:34:51,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:51,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 535 transitions, 7054 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:51,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:51,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:51,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:52,836 INFO L124 PetriNetUnfolderBase]: 3542/5600 cut-off events. [2024-06-20 17:34:52,837 INFO L125 PetriNetUnfolderBase]: For 1013765/1013765 co-relation queries the response was YES. [2024-06-20 17:34:52,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51166 conditions, 5600 events. 3542/5600 cut-off events. For 1013765/1013765 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33846 event pairs, 690 based on Foata normal form. 4/5603 useless extension candidates. Maximal degree in co-relation 50988. Up to 5000 conditions per place. [2024-06-20 17:34:52,936 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 462 selfloop transitions, 98 changer transitions 0/565 dead transitions. [2024-06-20 17:34:52,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 565 transitions, 8696 flow [2024-06-20 17:34:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:34:52,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 17:34:52,938 INFO L175 Difference]: Start difference. First operand has 383 places, 535 transitions, 7054 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:34:52,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 565 transitions, 8696 flow [2024-06-20 17:34:57,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 565 transitions, 8401 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:57,300 INFO L231 Difference]: Finished difference. Result has 386 places, 541 transitions, 7183 flow [2024-06-20 17:34:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7183, PETRI_PLACES=386, PETRI_TRANSITIONS=541} [2024-06-20 17:34:57,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-20 17:34:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 541 transitions, 7183 flow [2024-06-20 17:34:57,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:57,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:57,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:34:57,302 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:34:57,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash -10090768, now seen corresponding path program 1 times [2024-06-20 17:34:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641207647] [2024-06-20 17:34:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:57,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:58,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:58,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641207647] [2024-06-20 17:34:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641207647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:58,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:58,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565536267] [2024-06-20 17:34:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:58,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:34:58,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 541 transitions, 7183 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:58,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:58,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:34:58,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:59,636 INFO L124 PetriNetUnfolderBase]: 3614/5708 cut-off events. [2024-06-20 17:34:59,636 INFO L125 PetriNetUnfolderBase]: For 1159177/1159177 co-relation queries the response was YES. [2024-06-20 17:34:59,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52563 conditions, 5708 events. 3614/5708 cut-off events. For 1159177/1159177 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34571 event pairs, 729 based on Foata normal form. 20/5727 useless extension candidates. Maximal degree in co-relation 52383. Up to 4942 conditions per place. [2024-06-20 17:34:59,714 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 417 selfloop transitions, 145 changer transitions 0/567 dead transitions. [2024-06-20 17:34:59,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 567 transitions, 8503 flow [2024-06-20 17:34:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:34:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:34:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 17:34:59,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 17:34:59,716 INFO L175 Difference]: Start difference. First operand has 386 places, 541 transitions, 7183 flow. Second operand 9 states and 159 transitions. [2024-06-20 17:34:59,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 567 transitions, 8503 flow [2024-06-20 17:35:04,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 567 transitions, 8258 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:04,078 INFO L231 Difference]: Finished difference. Result has 390 places, 543 transitions, 7332 flow [2024-06-20 17:35:04,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6938, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7332, PETRI_PLACES=390, PETRI_TRANSITIONS=543} [2024-06-20 17:35:04,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 17:35:04,080 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 543 transitions, 7332 flow [2024-06-20 17:35:04,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:04,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:04,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:35:04,081 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:04,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash -577510844, now seen corresponding path program 4 times [2024-06-20 17:35:04,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:04,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945038566] [2024-06-20 17:35:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:05,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945038566] [2024-06-20 17:35:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945038566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:05,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:05,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:35:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324622269] [2024-06-20 17:35:05,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:05,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:35:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:05,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:35:05,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:35:05,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:05,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 543 transitions, 7332 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:05,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:05,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:05,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:06,547 INFO L124 PetriNetUnfolderBase]: 3630/5733 cut-off events. [2024-06-20 17:35:06,547 INFO L125 PetriNetUnfolderBase]: For 1065260/1065260 co-relation queries the response was YES. [2024-06-20 17:35:06,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53208 conditions, 5733 events. 3630/5733 cut-off events. For 1065260/1065260 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34740 event pairs, 725 based on Foata normal form. 4/5736 useless extension candidates. Maximal degree in co-relation 53026. Up to 4994 conditions per place. [2024-06-20 17:35:06,633 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 425 selfloop transitions, 137 changer transitions 0/567 dead transitions. [2024-06-20 17:35:06,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 567 transitions, 8888 flow [2024-06-20 17:35:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:35:06,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 17:35:06,634 INFO L175 Difference]: Start difference. First operand has 390 places, 543 transitions, 7332 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:35:06,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 567 transitions, 8888 flow [2024-06-20 17:35:11,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 567 transitions, 8546 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 17:35:11,637 INFO L231 Difference]: Finished difference. Result has 392 places, 546 transitions, 7390 flow [2024-06-20 17:35:11,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7390, PETRI_PLACES=392, PETRI_TRANSITIONS=546} [2024-06-20 17:35:11,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-20 17:35:11,638 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 546 transitions, 7390 flow [2024-06-20 17:35:11,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:11,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:11,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:11,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:35:11,638 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:11,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -577514564, now seen corresponding path program 5 times [2024-06-20 17:35:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:11,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556187789] [2024-06-20 17:35:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:12,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:12,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556187789] [2024-06-20 17:35:12,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556187789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:12,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:35:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422695784] [2024-06-20 17:35:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:35:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:12,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:35:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:35:12,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:12,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 546 transitions, 7390 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:12,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:12,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:12,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:14,080 INFO L124 PetriNetUnfolderBase]: 3806/5999 cut-off events. [2024-06-20 17:35:14,081 INFO L125 PetriNetUnfolderBase]: For 1286378/1286378 co-relation queries the response was YES. [2024-06-20 17:35:14,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59131 conditions, 5999 events. 3806/5999 cut-off events. For 1286378/1286378 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36598 event pairs, 754 based on Foata normal form. 4/6002 useless extension candidates. Maximal degree in co-relation 58948. Up to 5006 conditions per place. [2024-06-20 17:35:14,173 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 437 selfloop transitions, 137 changer transitions 0/579 dead transitions. [2024-06-20 17:35:14,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 579 transitions, 9428 flow [2024-06-20 17:35:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:35:14,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:35:14,174 INFO L175 Difference]: Start difference. First operand has 392 places, 546 transitions, 7390 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:35:14,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 579 transitions, 9428 flow [2024-06-20 17:35:18,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 579 transitions, 9050 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 17:35:18,992 INFO L231 Difference]: Finished difference. Result has 395 places, 552 transitions, 7543 flow [2024-06-20 17:35:18,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7012, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7543, PETRI_PLACES=395, PETRI_TRANSITIONS=552} [2024-06-20 17:35:18,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 17:35:18,992 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 552 transitions, 7543 flow [2024-06-20 17:35:18,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:18,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:18,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:35:18,993 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:18,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:18,993 INFO L85 PathProgramCache]: Analyzing trace with hash -572004314, now seen corresponding path program 6 times [2024-06-20 17:35:18,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:18,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597196022] [2024-06-20 17:35:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:19,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597196022] [2024-06-20 17:35:19,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597196022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:19,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:19,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:35:19,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695173110] [2024-06-20 17:35:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:19,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:35:19,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:35:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:35:20,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:20,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 552 transitions, 7543 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:20,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:20,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:20,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:21,540 INFO L124 PetriNetUnfolderBase]: 3809/6008 cut-off events. [2024-06-20 17:35:21,540 INFO L125 PetriNetUnfolderBase]: For 1295021/1295021 co-relation queries the response was YES. [2024-06-20 17:35:21,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59232 conditions, 6008 events. 3809/6008 cut-off events. For 1295021/1295021 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 36674 event pairs, 764 based on Foata normal form. 4/6011 useless extension candidates. Maximal degree in co-relation 59047. Up to 5361 conditions per place. [2024-06-20 17:35:21,630 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 434 selfloop transitions, 136 changer transitions 0/575 dead transitions. [2024-06-20 17:35:21,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 575 transitions, 8883 flow [2024-06-20 17:35:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 17:35:21,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 17:35:21,632 INFO L175 Difference]: Start difference. First operand has 395 places, 552 transitions, 7543 flow. Second operand 9 states and 154 transitions. [2024-06-20 17:35:21,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 575 transitions, 8883 flow [2024-06-20 17:35:26,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 575 transitions, 8566 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:26,819 INFO L231 Difference]: Finished difference. Result has 399 places, 555 transitions, 7638 flow [2024-06-20 17:35:26,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7638, PETRI_PLACES=399, PETRI_TRANSITIONS=555} [2024-06-20 17:35:26,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-20 17:35:26,820 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 555 transitions, 7638 flow [2024-06-20 17:35:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:26,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:26,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:26,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:35:26,820 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:26,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 134001572, now seen corresponding path program 2 times [2024-06-20 17:35:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046926475] [2024-06-20 17:35:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:26,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:27,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046926475] [2024-06-20 17:35:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046926475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:27,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:27,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639757555] [2024-06-20 17:35:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:27,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:27,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 555 transitions, 7638 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:27,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:27,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:27,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:29,122 INFO L124 PetriNetUnfolderBase]: 3822/6029 cut-off events. [2024-06-20 17:35:29,122 INFO L125 PetriNetUnfolderBase]: For 1359497/1359497 co-relation queries the response was YES. [2024-06-20 17:35:29,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58146 conditions, 6029 events. 3822/6029 cut-off events. For 1359497/1359497 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36838 event pairs, 747 based on Foata normal form. 20/6048 useless extension candidates. Maximal degree in co-relation 57959. Up to 5202 conditions per place. [2024-06-20 17:35:29,214 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 425 selfloop transitions, 152 changer transitions 0/582 dead transitions. [2024-06-20 17:35:29,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 582 transitions, 9253 flow [2024-06-20 17:35:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 17:35:29,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 17:35:29,216 INFO L175 Difference]: Start difference. First operand has 399 places, 555 transitions, 7638 flow. Second operand 9 states and 162 transitions. [2024-06-20 17:35:29,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 582 transitions, 9253 flow [2024-06-20 17:35:34,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 582 transitions, 8850 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-20 17:35:34,694 INFO L231 Difference]: Finished difference. Result has 401 places, 557 transitions, 7656 flow [2024-06-20 17:35:34,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7235, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7656, PETRI_PLACES=401, PETRI_TRANSITIONS=557} [2024-06-20 17:35:34,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-20 17:35:34,694 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 557 transitions, 7656 flow [2024-06-20 17:35:34,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:34,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:34,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:34,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:35:34,695 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:34,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2085770942, now seen corresponding path program 3 times [2024-06-20 17:35:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889356771] [2024-06-20 17:35:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:34,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:35,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:35,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889356771] [2024-06-20 17:35:35,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889356771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:35,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:35,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749749173] [2024-06-20 17:35:35,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:35,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:35,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:35,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 557 transitions, 7656 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:35,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:35,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:35,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:37,192 INFO L124 PetriNetUnfolderBase]: 3944/6217 cut-off events. [2024-06-20 17:35:37,192 INFO L125 PetriNetUnfolderBase]: For 1463887/1463887 co-relation queries the response was YES. [2024-06-20 17:35:37,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61989 conditions, 6217 events. 3944/6217 cut-off events. For 1463887/1463887 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 38054 event pairs, 773 based on Foata normal form. 16/6232 useless extension candidates. Maximal degree in co-relation 61801. Up to 5114 conditions per place. [2024-06-20 17:35:37,279 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 161 changer transitions 0/590 dead transitions. [2024-06-20 17:35:37,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 590 transitions, 9674 flow [2024-06-20 17:35:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:35:37,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:35:37,280 INFO L175 Difference]: Start difference. First operand has 401 places, 557 transitions, 7656 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:35:37,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 590 transitions, 9674 flow [2024-06-20 17:35:44,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 590 transitions, 9304 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 17:35:44,593 INFO L231 Difference]: Finished difference. Result has 403 places, 561 transitions, 7829 flow [2024-06-20 17:35:44,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7829, PETRI_PLACES=403, PETRI_TRANSITIONS=561} [2024-06-20 17:35:44,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-20 17:35:44,594 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 561 transitions, 7829 flow [2024-06-20 17:35:44,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:44,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:44,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:44,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:35:44,594 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:44,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1616220850, now seen corresponding path program 7 times [2024-06-20 17:35:44,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:44,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670264812] [2024-06-20 17:35:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:44,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670264812] [2024-06-20 17:35:45,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670264812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:45,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:45,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:35:45,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504211101] [2024-06-20 17:35:45,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:45,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:35:45,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:35:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:35:45,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:45,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 561 transitions, 7829 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:45,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:45,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:45,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:47,312 INFO L124 PetriNetUnfolderBase]: 3960/6235 cut-off events. [2024-06-20 17:35:47,312 INFO L125 PetriNetUnfolderBase]: For 1384764/1384766 co-relation queries the response was YES. [2024-06-20 17:35:47,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62011 conditions, 6235 events. 3960/6235 cut-off events. For 1384764/1384766 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38152 event pairs, 826 based on Foata normal form. 4/6238 useless extension candidates. Maximal degree in co-relation 61822. Up to 5140 conditions per place. [2024-06-20 17:35:47,409 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 357 selfloop transitions, 221 changer transitions 0/583 dead transitions. [2024-06-20 17:35:47,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 583 transitions, 9687 flow [2024-06-20 17:35:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:35:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:35:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 17:35:47,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 17:35:47,411 INFO L175 Difference]: Start difference. First operand has 403 places, 561 transitions, 7829 flow. Second operand 9 states and 161 transitions. [2024-06-20 17:35:47,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 583 transitions, 9687 flow [2024-06-20 17:35:55,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 583 transitions, 9388 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:55,090 INFO L231 Difference]: Finished difference. Result has 407 places, 564 transitions, 8118 flow [2024-06-20 17:35:55,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7530, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8118, PETRI_PLACES=407, PETRI_TRANSITIONS=564} [2024-06-20 17:35:55,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-20 17:35:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 564 transitions, 8118 flow [2024-06-20 17:35:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:55,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:55,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:55,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:35:55,093 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:35:55,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:55,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1616070748, now seen corresponding path program 4 times [2024-06-20 17:35:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:55,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173694783] [2024-06-20 17:35:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:55,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:56,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:56,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173694783] [2024-06-20 17:35:56,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173694783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:56,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:56,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:35:56,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834104981] [2024-06-20 17:35:56,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:56,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:35:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:35:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:35:56,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:35:56,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 564 transitions, 8118 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:56,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:56,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:35:56,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:57,857 INFO L124 PetriNetUnfolderBase]: 4032/6357 cut-off events. [2024-06-20 17:35:57,858 INFO L125 PetriNetUnfolderBase]: For 1538728/1538730 co-relation queries the response was YES. [2024-06-20 17:35:57,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63581 conditions, 6357 events. 4032/6357 cut-off events. For 1538728/1538730 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 39089 event pairs, 846 based on Foata normal form. 20/6376 useless extension candidates. Maximal degree in co-relation 63390. Up to 5440 conditions per place. [2024-06-20 17:35:57,959 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 419 selfloop transitions, 165 changer transitions 0/589 dead transitions. [2024-06-20 17:35:57,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 589 transitions, 9499 flow [2024-06-20 17:35:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:35:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:35:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:35:57,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-20 17:35:57,960 INFO L175 Difference]: Start difference. First operand has 407 places, 564 transitions, 8118 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:35:57,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 589 transitions, 9499 flow [2024-06-20 17:36:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 589 transitions, 8933 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-20 17:36:05,045 INFO L231 Difference]: Finished difference. Result has 410 places, 566 transitions, 8010 flow [2024-06-20 17:36:05,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8010, PETRI_PLACES=410, PETRI_TRANSITIONS=566} [2024-06-20 17:36:05,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 17:36:05,045 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 566 transitions, 8010 flow [2024-06-20 17:36:05,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:05,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:05,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:36:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:36:05,046 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:36:05,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2127758268, now seen corresponding path program 8 times [2024-06-20 17:36:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:05,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627944175] [2024-06-20 17:36:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627944175] [2024-06-20 17:36:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627944175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:06,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:06,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:36:06,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633945105] [2024-06-20 17:36:06,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:06,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:36:06,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:36:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:36:06,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:36:06,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 566 transitions, 8010 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:06,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:06,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:36:06,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:07,781 INFO L124 PetriNetUnfolderBase]: 4169/6557 cut-off events. [2024-06-20 17:36:07,781 INFO L125 PetriNetUnfolderBase]: For 1614850/1614852 co-relation queries the response was YES. [2024-06-20 17:36:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68667 conditions, 6557 events. 4169/6557 cut-off events. For 1614850/1614852 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 40450 event pairs, 878 based on Foata normal form. 4/6560 useless extension candidates. Maximal degree in co-relation 68475. Up to 5183 conditions per place. [2024-06-20 17:36:07,883 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 371 selfloop transitions, 221 changer transitions 0/597 dead transitions. [2024-06-20 17:36:07,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 597 transitions, 10402 flow [2024-06-20 17:36:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:36:07,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:36:07,884 INFO L175 Difference]: Start difference. First operand has 410 places, 566 transitions, 8010 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:36:07,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 597 transitions, 10402 flow [2024-06-20 17:36:14,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 597 transitions, 9992 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-20 17:36:14,923 INFO L231 Difference]: Finished difference. Result has 412 places, 572 transitions, 8342 flow [2024-06-20 17:36:14,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8342, PETRI_PLACES=412, PETRI_TRANSITIONS=572} [2024-06-20 17:36:14,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-20 17:36:14,928 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 572 transitions, 8342 flow [2024-06-20 17:36:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:14,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:14,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:36:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:36:14,928 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:36:14,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1610714320, now seen corresponding path program 9 times [2024-06-20 17:36:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:14,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681908421] [2024-06-20 17:36:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:15,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681908421] [2024-06-20 17:36:15,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681908421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:15,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:15,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:36:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427868769] [2024-06-20 17:36:15,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:15,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:36:15,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:36:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:36:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:36:16,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 572 transitions, 8342 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:16,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:16,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:36:16,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:17,641 INFO L124 PetriNetUnfolderBase]: 4257/6696 cut-off events. [2024-06-20 17:36:17,641 INFO L125 PetriNetUnfolderBase]: For 1820221/1820223 co-relation queries the response was YES. [2024-06-20 17:36:17,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70448 conditions, 6696 events. 4257/6696 cut-off events. For 1820221/1820223 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 41387 event pairs, 893 based on Foata normal form. 24/6719 useless extension candidates. Maximal degree in co-relation 70254. Up to 5511 conditions per place. [2024-06-20 17:36:17,747 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 378 selfloop transitions, 215 changer transitions 0/598 dead transitions. [2024-06-20 17:36:17,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 598 transitions, 10294 flow [2024-06-20 17:36:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 17:36:17,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-20 17:36:17,749 INFO L175 Difference]: Start difference. First operand has 412 places, 572 transitions, 8342 flow. Second operand 9 states and 166 transitions. [2024-06-20 17:36:17,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 598 transitions, 10294 flow [2024-06-20 17:36:24,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 598 transitions, 9844 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-20 17:36:24,433 INFO L231 Difference]: Finished difference. Result has 416 places, 575 transitions, 8488 flow [2024-06-20 17:36:24,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7910, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8488, PETRI_PLACES=416, PETRI_TRANSITIONS=575} [2024-06-20 17:36:24,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-20 17:36:24,433 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 575 transitions, 8488 flow [2024-06-20 17:36:24,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:24,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:24,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:36:24,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:36:24,441 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:36:24,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1610499118, now seen corresponding path program 5 times [2024-06-20 17:36:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:24,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992324192] [2024-06-20 17:36:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992324192] [2024-06-20 17:36:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992324192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722536910] [2024-06-20 17:36:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:25,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:25,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:25,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:36:25,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 575 transitions, 8488 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:25,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:25,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:36:25,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:27,070 INFO L124 PetriNetUnfolderBase]: 4431/6966 cut-off events. [2024-06-20 17:36:27,070 INFO L125 PetriNetUnfolderBase]: For 1982241/1982243 co-relation queries the response was YES. [2024-06-20 17:36:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76873 conditions, 6966 events. 4431/6966 cut-off events. For 1982241/1982243 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43270 event pairs, 925 based on Foata normal form. 16/6981 useless extension candidates. Maximal degree in co-relation 76677. Up to 5459 conditions per place. [2024-06-20 17:36:27,374 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 222 changer transitions 0/606 dead transitions. [2024-06-20 17:36:27,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 606 transitions, 10842 flow [2024-06-20 17:36:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 17:36:27,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 17:36:27,376 INFO L175 Difference]: Start difference. First operand has 416 places, 575 transitions, 8488 flow. Second operand 9 states and 168 transitions. [2024-06-20 17:36:27,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 606 transitions, 10842 flow [2024-06-20 17:36:33,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 606 transitions, 10316 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-20 17:36:33,095 INFO L231 Difference]: Finished difference. Result has 418 places, 579 transitions, 8663 flow [2024-06-20 17:36:33,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7962, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8663, PETRI_PLACES=418, PETRI_TRANSITIONS=579} [2024-06-20 17:36:33,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 17:36:33,096 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 579 transitions, 8663 flow [2024-06-20 17:36:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:33,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:33,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:36:33,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:36:33,096 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:36:33,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash 587876596, now seen corresponding path program 6 times [2024-06-20 17:36:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139240375] [2024-06-20 17:36:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:33,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:34,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139240375] [2024-06-20 17:36:34,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139240375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:34,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:34,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:36:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676168201] [2024-06-20 17:36:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:36:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:34,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:36:34,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:36:34,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:36:34,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 579 transitions, 8663 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:34,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:34,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:36:34,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:36,072 INFO L124 PetriNetUnfolderBase]: 4451/6991 cut-off events. [2024-06-20 17:36:36,072 INFO L125 PetriNetUnfolderBase]: For 1966437/1966439 co-relation queries the response was YES. [2024-06-20 17:36:36,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75720 conditions, 6991 events. 4451/6991 cut-off events. For 1966437/1966439 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43421 event pairs, 955 based on Foata normal form. 20/7010 useless extension candidates. Maximal degree in co-relation 75523. Up to 5721 conditions per place. [2024-06-20 17:36:36,182 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 385 selfloop transitions, 216 changer transitions 0/606 dead transitions. [2024-06-20 17:36:36,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 606 transitions, 10621 flow [2024-06-20 17:36:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:36:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:36:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 17:36:36,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-20 17:36:36,183 INFO L175 Difference]: Start difference. First operand has 418 places, 579 transitions, 8663 flow. Second operand 10 states and 181 transitions. [2024-06-20 17:36:36,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 606 transitions, 10621 flow [2024-06-20 17:36:42,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 606 transitions, 10061 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-20 17:36:42,845 INFO L231 Difference]: Finished difference. Result has 422 places, 581 transitions, 8678 flow [2024-06-20 17:36:42,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8121, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8678, PETRI_PLACES=422, PETRI_TRANSITIONS=581} [2024-06-20 17:36:42,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-20 17:36:42,846 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 581 transitions, 8678 flow [2024-06-20 17:36:42,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:42,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:42,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:36:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:36:42,847 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:36:42,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1409417308, now seen corresponding path program 7 times [2024-06-20 17:36:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:42,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757425713] [2024-06-20 17:36:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:43,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:43,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757425713] [2024-06-20 17:36:43,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757425713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:43,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:43,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:43,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413250086] [2024-06-20 17:36:43,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:43,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:43,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:43,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:36:43,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 581 transitions, 8678 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:43,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:43,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:36:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:45,439 INFO L124 PetriNetUnfolderBase]: 4467/7039 cut-off events. [2024-06-20 17:36:45,439 INFO L125 PetriNetUnfolderBase]: For 1898213/1898215 co-relation queries the response was YES. [2024-06-20 17:36:45,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73364 conditions, 7039 events. 4467/7039 cut-off events. For 1898213/1898215 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43923 event pairs, 957 based on Foata normal form. 24/7062 useless extension candidates. Maximal degree in co-relation 73166. Up to 5841 conditions per place. [2024-06-20 17:36:45,553 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 353 selfloop transitions, 248 changer transitions 0/606 dead transitions. [2024-06-20 17:36:45,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 606 transitions, 10378 flow [2024-06-20 17:36:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:36:45,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:36:45,554 INFO L175 Difference]: Start difference. First operand has 422 places, 581 transitions, 8678 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:36:45,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 606 transitions, 10378 flow [2024-06-20 17:36:53,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 606 transitions, 9841 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-20 17:36:53,135 INFO L231 Difference]: Finished difference. Result has 421 places, 584 transitions, 8791 flow [2024-06-20 17:36:53,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8141, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8791, PETRI_PLACES=421, PETRI_TRANSITIONS=584} [2024-06-20 17:36:53,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-20 17:36:53,136 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 584 transitions, 8791 flow [2024-06-20 17:36:53,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:53,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:36:53,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:36:53,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:36:53,137 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:36:53,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:36:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash 608484778, now seen corresponding path program 8 times [2024-06-20 17:36:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:36:53,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932682475] [2024-06-20 17:36:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:36:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:36:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:36:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:36:53,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:36:53,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932682475] [2024-06-20 17:36:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932682475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:36:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:36:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:36:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422032454] [2024-06-20 17:36:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:36:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:36:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:36:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:36:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:36:53,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:36:53,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 584 transitions, 8791 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:36:53,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:36:53,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:36:53,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:36:55,859 INFO L124 PetriNetUnfolderBase]: 4641/7299 cut-off events. [2024-06-20 17:36:55,859 INFO L125 PetriNetUnfolderBase]: For 2060150/2060152 co-relation queries the response was YES. [2024-06-20 17:36:55,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79182 conditions, 7299 events. 4641/7299 cut-off events. For 2060150/2060152 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 45692 event pairs, 983 based on Foata normal form. 16/7314 useless extension candidates. Maximal degree in co-relation 78985. Up to 5873 conditions per place. [2024-06-20 17:36:55,972 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 356 selfloop transitions, 253 changer transitions 0/614 dead transitions. [2024-06-20 17:36:55,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 614 transitions, 10917 flow [2024-06-20 17:36:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:36:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:36:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 17:36:55,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 17:36:55,973 INFO L175 Difference]: Start difference. First operand has 421 places, 584 transitions, 8791 flow. Second operand 9 states and 167 transitions. [2024-06-20 17:36:55,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 614 transitions, 10917 flow [2024-06-20 17:37:02,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 614 transitions, 10319 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-20 17:37:02,745 INFO L231 Difference]: Finished difference. Result has 423 places, 588 transitions, 8965 flow [2024-06-20 17:37:02,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8193, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8965, PETRI_PLACES=423, PETRI_TRANSITIONS=588} [2024-06-20 17:37:02,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-20 17:37:02,746 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 588 transitions, 8965 flow [2024-06-20 17:37:02,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:02,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:02,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:37:02,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:37:02,746 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:37:02,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1159259986, now seen corresponding path program 9 times [2024-06-20 17:37:02,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:02,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178002887] [2024-06-20 17:37:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:03,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:03,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178002887] [2024-06-20 17:37:03,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178002887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:03,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:03,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:37:03,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83950956] [2024-06-20 17:37:03,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:37:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:37:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:37:03,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:37:03,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 588 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:03,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:03,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:37:03,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:05,610 INFO L124 PetriNetUnfolderBase]: 4661/7324 cut-off events. [2024-06-20 17:37:05,610 INFO L125 PetriNetUnfolderBase]: For 2048066/2048068 co-relation queries the response was YES. [2024-06-20 17:37:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77893 conditions, 7324 events. 4661/7324 cut-off events. For 2048066/2048068 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 45831 event pairs, 997 based on Foata normal form. 20/7343 useless extension candidates. Maximal degree in co-relation 77695. Up to 6415 conditions per place. [2024-06-20 17:37:05,728 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 417 selfloop transitions, 193 changer transitions 0/615 dead transitions. [2024-06-20 17:37:05,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 615 transitions, 10451 flow [2024-06-20 17:37:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:37:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:37:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-20 17:37:05,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-20 17:37:05,729 INFO L175 Difference]: Start difference. First operand has 423 places, 588 transitions, 8965 flow. Second operand 10 states and 173 transitions. [2024-06-20 17:37:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 615 transitions, 10451 flow [2024-06-20 17:37:12,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 615 transitions, 9971 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-20 17:37:12,563 INFO L231 Difference]: Finished difference. Result has 429 places, 593 transitions, 9070 flow [2024-06-20 17:37:12,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8507, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9070, PETRI_PLACES=429, PETRI_TRANSITIONS=593} [2024-06-20 17:37:12,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-20 17:37:12,564 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 593 transitions, 9070 flow [2024-06-20 17:37:12,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:12,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:12,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:37:12,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:37:12,565 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:37:12,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:12,565 INFO L85 PathProgramCache]: Analyzing trace with hash 874182058, now seen corresponding path program 10 times [2024-06-20 17:37:12,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:12,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135739216] [2024-06-20 17:37:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:13,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135739216] [2024-06-20 17:37:13,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135739216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:13,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:13,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:37:13,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267647389] [2024-06-20 17:37:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:13,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:37:13,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:37:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:37:13,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:37:13,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 593 transitions, 9070 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:13,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:13,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:37:13,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:15,467 INFO L124 PetriNetUnfolderBase]: 4691/7390 cut-off events. [2024-06-20 17:37:15,467 INFO L125 PetriNetUnfolderBase]: For 1982598/1982600 co-relation queries the response was YES. [2024-06-20 17:37:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77454 conditions, 7390 events. 4691/7390 cut-off events. For 1982598/1982600 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 46330 event pairs, 933 based on Foata normal form. 16/7405 useless extension candidates. Maximal degree in co-relation 77253. Up to 5039 conditions per place. [2024-06-20 17:37:15,581 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 292 changer transitions 0/621 dead transitions. [2024-06-20 17:37:15,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 621 transitions, 11092 flow [2024-06-20 17:37:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:37:15,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:37:15,583 INFO L175 Difference]: Start difference. First operand has 429 places, 593 transitions, 9070 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:37:15,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 621 transitions, 11092 flow [2024-06-20 17:37:22,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 621 transitions, 10759 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-20 17:37:22,827 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 9462 flow [2024-06-20 17:37:22,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8737, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9462, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-20 17:37:22,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 17:37:22,827 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 9462 flow [2024-06-20 17:37:22,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:22,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:22,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:37:22,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:37:22,828 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:37:22,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1955097412, now seen corresponding path program 1 times [2024-06-20 17:37:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247425384] [2024-06-20 17:37:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:23,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:23,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247425384] [2024-06-20 17:37:23,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247425384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:23,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:23,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:37:23,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483698278] [2024-06-20 17:37:23,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:23,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:37:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:23,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:37:23,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:37:23,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:37:23,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 9462 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:23,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:23,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:37:23,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:25,737 INFO L124 PetriNetUnfolderBase]: 4701/7393 cut-off events. [2024-06-20 17:37:25,737 INFO L125 PetriNetUnfolderBase]: For 1873519/1873519 co-relation queries the response was YES. [2024-06-20 17:37:25,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77956 conditions, 7393 events. 4701/7393 cut-off events. For 1873519/1873519 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 46344 event pairs, 967 based on Foata normal form. 2/7395 useless extension candidates. Maximal degree in co-relation 77754. Up to 7056 conditions per place. [2024-06-20 17:37:25,853 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 587 selfloop transitions, 44 changer transitions 0/636 dead transitions. [2024-06-20 17:37:25,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 636 transitions, 10991 flow [2024-06-20 17:37:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 17:37:25,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 17:37:25,855 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 9462 flow. Second operand 9 states and 157 transitions. [2024-06-20 17:37:25,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 636 transitions, 10991 flow [2024-06-20 17:37:31,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 636 transitions, 10298 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-20 17:37:31,944 INFO L231 Difference]: Finished difference. Result has 435 places, 605 transitions, 9028 flow [2024-06-20 17:37:31,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9028, PETRI_PLACES=435, PETRI_TRANSITIONS=605} [2024-06-20 17:37:31,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-20 17:37:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 605 transitions, 9028 flow [2024-06-20 17:37:31,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:31,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:31,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:37:31,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:37:31,945 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:37:31,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1266693510, now seen corresponding path program 2 times [2024-06-20 17:37:31,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:31,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314818119] [2024-06-20 17:37:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:31,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314818119] [2024-06-20 17:37:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314818119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:32,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:37:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363883313] [2024-06-20 17:37:32,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:32,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:37:32,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:37:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:37:32,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:37:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 605 transitions, 9028 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:32,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:32,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:37:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:35,159 INFO L124 PetriNetUnfolderBase]: 4719/7423 cut-off events. [2024-06-20 17:37:35,160 INFO L125 PetriNetUnfolderBase]: For 1889683/1889683 co-relation queries the response was YES. [2024-06-20 17:37:35,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77411 conditions, 7423 events. 4719/7423 cut-off events. For 1889683/1889683 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46556 event pairs, 977 based on Foata normal form. 2/7425 useless extension candidates. Maximal degree in co-relation 77207. Up to 7060 conditions per place. [2024-06-20 17:37:35,269 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 585 selfloop transitions, 50 changer transitions 0/640 dead transitions. [2024-06-20 17:37:35,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 640 transitions, 10894 flow [2024-06-20 17:37:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:37:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:37:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 17:37:35,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 17:37:35,270 INFO L175 Difference]: Start difference. First operand has 435 places, 605 transitions, 9028 flow. Second operand 9 states and 158 transitions. [2024-06-20 17:37:35,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 640 transitions, 10894 flow [2024-06-20 17:37:41,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 640 transitions, 10747 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-20 17:37:41,205 INFO L231 Difference]: Finished difference. Result has 439 places, 611 transitions, 9201 flow [2024-06-20 17:37:41,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9201, PETRI_PLACES=439, PETRI_TRANSITIONS=611} [2024-06-20 17:37:41,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-20 17:37:41,206 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 611 transitions, 9201 flow [2024-06-20 17:37:41,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:41,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:41,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:37:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:37:41,206 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:37:41,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1300490820, now seen corresponding path program 1 times [2024-06-20 17:37:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:41,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822488618] [2024-06-20 17:37:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:41,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:41,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:41,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822488618] [2024-06-20 17:37:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822488618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:41,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:41,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:37:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11948938] [2024-06-20 17:37:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:41,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:37:41,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:37:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:37:41,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:37:41,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 611 transitions, 9201 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:41,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:41,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:37:41,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:44,197 INFO L124 PetriNetUnfolderBase]: 4724/7421 cut-off events. [2024-06-20 17:37:44,197 INFO L125 PetriNetUnfolderBase]: For 1912626/1912626 co-relation queries the response was YES. [2024-06-20 17:37:44,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78017 conditions, 7421 events. 4724/7421 cut-off events. For 1912626/1912626 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 46533 event pairs, 969 based on Foata normal form. 1/7419 useless extension candidates. Maximal degree in co-relation 77812. Up to 7063 conditions per place. [2024-06-20 17:37:44,325 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 566 selfloop transitions, 59 changer transitions 0/630 dead transitions. [2024-06-20 17:37:44,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 630 transitions, 10589 flow [2024-06-20 17:37:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:37:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:37:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 17:37:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 17:37:44,327 INFO L175 Difference]: Start difference. First operand has 439 places, 611 transitions, 9201 flow. Second operand 7 states and 123 transitions. [2024-06-20 17:37:44,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 630 transitions, 10589 flow [2024-06-20 17:37:50,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 630 transitions, 10415 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-20 17:37:50,153 INFO L231 Difference]: Finished difference. Result has 441 places, 614 transitions, 9238 flow [2024-06-20 17:37:50,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9238, PETRI_PLACES=441, PETRI_TRANSITIONS=614} [2024-06-20 17:37:50,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-20 17:37:50,153 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 614 transitions, 9238 flow [2024-06-20 17:37:50,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:50,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:37:50,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:37:50,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:37:50,154 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:37:50,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:37:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1203987712, now seen corresponding path program 2 times [2024-06-20 17:37:50,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:37:50,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187590052] [2024-06-20 17:37:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:37:50,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:37:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:37:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:37:50,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:37:50,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187590052] [2024-06-20 17:37:50,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187590052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:37:50,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:37:50,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:37:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572720115] [2024-06-20 17:37:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:37:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:37:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:37:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:37:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:37:50,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:37:50,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 614 transitions, 9238 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:37:50,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:37:50,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:37:50,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:37:53,245 INFO L124 PetriNetUnfolderBase]: 4742/7454 cut-off events. [2024-06-20 17:37:53,245 INFO L125 PetriNetUnfolderBase]: For 1946492/1946492 co-relation queries the response was YES. [2024-06-20 17:37:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78558 conditions, 7454 events. 4742/7454 cut-off events. For 1946492/1946492 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46836 event pairs, 966 based on Foata normal form. 1/7452 useless extension candidates. Maximal degree in co-relation 78351. Up to 7012 conditions per place. [2024-06-20 17:37:53,361 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 104 changer transitions 0/641 dead transitions. [2024-06-20 17:37:53,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 641 transitions, 11035 flow [2024-06-20 17:37:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:37:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:37:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 17:37:53,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-20 17:37:53,363 INFO L175 Difference]: Start difference. First operand has 441 places, 614 transitions, 9238 flow. Second operand 8 states and 141 transitions. [2024-06-20 17:37:53,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 641 transitions, 11035 flow [2024-06-20 17:38:00,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 641 transitions, 10883 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:38:00,334 INFO L231 Difference]: Finished difference. Result has 445 places, 623 transitions, 9528 flow [2024-06-20 17:38:00,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9086, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9528, PETRI_PLACES=445, PETRI_TRANSITIONS=623} [2024-06-20 17:38:00,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-20 17:38:00,334 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 623 transitions, 9528 flow [2024-06-20 17:38:00,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:00,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:00,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:38:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 17:38:00,335 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:38:00,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash 519106652, now seen corresponding path program 3 times [2024-06-20 17:38:00,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:00,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435063183] [2024-06-20 17:38:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:00,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:01,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435063183] [2024-06-20 17:38:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435063183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:01,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:38:01,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458915741] [2024-06-20 17:38:01,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:01,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:38:01,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:38:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:38:01,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:38:01,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 623 transitions, 9528 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:01,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:01,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:38:01,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:03,507 INFO L124 PetriNetUnfolderBase]: 4739/7450 cut-off events. [2024-06-20 17:38:03,507 INFO L125 PetriNetUnfolderBase]: For 1962730/1962730 co-relation queries the response was YES. [2024-06-20 17:38:03,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78731 conditions, 7450 events. 4739/7450 cut-off events. For 1962730/1962730 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 46789 event pairs, 968 based on Foata normal form. 1/7448 useless extension candidates. Maximal degree in co-relation 78522. Up to 7009 conditions per place. [2024-06-20 17:38:03,621 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 539 selfloop transitions, 96 changer transitions 0/640 dead transitions. [2024-06-20 17:38:03,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 640 transitions, 10865 flow [2024-06-20 17:38:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:38:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:38:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 17:38:03,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 17:38:03,623 INFO L175 Difference]: Start difference. First operand has 445 places, 623 transitions, 9528 flow. Second operand 8 states and 140 transitions. [2024-06-20 17:38:03,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 640 transitions, 10865 flow [2024-06-20 17:38:10,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 640 transitions, 10660 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-20 17:38:10,763 INFO L231 Difference]: Finished difference. Result has 448 places, 623 transitions, 9529 flow [2024-06-20 17:38:10,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9323, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9529, PETRI_PLACES=448, PETRI_TRANSITIONS=623} [2024-06-20 17:38:10,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 17:38:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 623 transitions, 9529 flow [2024-06-20 17:38:10,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:10,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:10,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:38:10,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 17:38:10,765 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:38:10,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1203994408, now seen corresponding path program 3 times [2024-06-20 17:38:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:10,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517095516] [2024-06-20 17:38:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:11,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:11,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517095516] [2024-06-20 17:38:11,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517095516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:11,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:11,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:38:11,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862915517] [2024-06-20 17:38:11,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:11,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:38:11,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:11,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:38:11,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:38:11,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:38:11,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 623 transitions, 9529 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:11,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:11,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:38:11,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:13,880 INFO L124 PetriNetUnfolderBase]: 4749/7465 cut-off events. [2024-06-20 17:38:13,881 INFO L125 PetriNetUnfolderBase]: For 1974257/1974257 co-relation queries the response was YES. [2024-06-20 17:38:13,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79090 conditions, 7465 events. 4749/7465 cut-off events. For 1974257/1974257 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 46867 event pairs, 973 based on Foata normal form. 2/7467 useless extension candidates. Maximal degree in co-relation 78880. Up to 7088 conditions per place. [2024-06-20 17:38:14,008 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 58 changer transitions 0/656 dead transitions. [2024-06-20 17:38:14,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 656 transitions, 11337 flow [2024-06-20 17:38:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:38:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:38:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-20 17:38:14,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-20 17:38:14,009 INFO L175 Difference]: Start difference. First operand has 448 places, 623 transitions, 9529 flow. Second operand 10 states and 172 transitions. [2024-06-20 17:38:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 656 transitions, 11337 flow [2024-06-20 17:38:19,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 656 transitions, 11189 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:38:19,523 INFO L231 Difference]: Finished difference. Result has 452 places, 626 transitions, 9621 flow [2024-06-20 17:38:19,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9621, PETRI_PLACES=452, PETRI_TRANSITIONS=626} [2024-06-20 17:38:19,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-20 17:38:19,524 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 626 transitions, 9621 flow [2024-06-20 17:38:19,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:19,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:19,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:38:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 17:38:19,525 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:38:19,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:19,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1211832804, now seen corresponding path program 1 times [2024-06-20 17:38:19,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:19,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538021477] [2024-06-20 17:38:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:19,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:20,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:20,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538021477] [2024-06-20 17:38:20,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538021477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:20,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:20,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:38:20,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936748314] [2024-06-20 17:38:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:38:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:38:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:38:20,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:38:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 626 transitions, 9621 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:20,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:38:20,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:22,345 INFO L124 PetriNetUnfolderBase]: 4744/7451 cut-off events. [2024-06-20 17:38:22,346 INFO L125 PetriNetUnfolderBase]: For 1957813/1957813 co-relation queries the response was YES. [2024-06-20 17:38:22,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79161 conditions, 7451 events. 4744/7451 cut-off events. For 1957813/1957813 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 46751 event pairs, 868 based on Foata normal form. 2/7450 useless extension candidates. Maximal degree in co-relation 78951. Up to 7140 conditions per place. [2024-06-20 17:38:22,598 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 620 selfloop transitions, 20 changer transitions 0/645 dead transitions. [2024-06-20 17:38:22,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 645 transitions, 11011 flow [2024-06-20 17:38:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:38:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:38:22,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 17:38:22,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-20 17:38:22,599 INFO L175 Difference]: Start difference. First operand has 452 places, 626 transitions, 9621 flow. Second operand 7 states and 116 transitions. [2024-06-20 17:38:22,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 645 transitions, 11011 flow [2024-06-20 17:38:28,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 645 transitions, 10795 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-20 17:38:28,651 INFO L231 Difference]: Finished difference. Result has 451 places, 628 transitions, 9504 flow [2024-06-20 17:38:28,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9405, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9504, PETRI_PLACES=451, PETRI_TRANSITIONS=628} [2024-06-20 17:38:28,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 17:38:28,652 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 628 transitions, 9504 flow [2024-06-20 17:38:28,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:28,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:28,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:38:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 17:38:28,653 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:38:28,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1687213770, now seen corresponding path program 2 times [2024-06-20 17:38:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275670335] [2024-06-20 17:38:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:29,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275670335] [2024-06-20 17:38:29,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275670335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:29,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:29,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:38:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103900196] [2024-06-20 17:38:29,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:29,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:38:29,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:38:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:38:29,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:38:29,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 628 transitions, 9504 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:29,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:38:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:31,621 INFO L124 PetriNetUnfolderBase]: 4752/7463 cut-off events. [2024-06-20 17:38:31,621 INFO L125 PetriNetUnfolderBase]: For 1980975/1980975 co-relation queries the response was YES. [2024-06-20 17:38:31,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79255 conditions, 7463 events. 4752/7463 cut-off events. For 1980975/1980975 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46834 event pairs, 979 based on Foata normal form. 2/7462 useless extension candidates. Maximal degree in co-relation 79044. Up to 7150 conditions per place. [2024-06-20 17:38:31,741 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 595 selfloop transitions, 42 changer transitions 0/642 dead transitions. [2024-06-20 17:38:31,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 642 transitions, 10878 flow [2024-06-20 17:38:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:38:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:38:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 17:38:31,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-20 17:38:31,743 INFO L175 Difference]: Start difference. First operand has 451 places, 628 transitions, 9504 flow. Second operand 7 states and 118 transitions. [2024-06-20 17:38:31,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 642 transitions, 10878 flow [2024-06-20 17:38:39,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 642 transitions, 10795 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 17:38:39,776 INFO L231 Difference]: Finished difference. Result has 453 places, 630 transitions, 9573 flow [2024-06-20 17:38:39,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9421, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9573, PETRI_PLACES=453, PETRI_TRANSITIONS=630} [2024-06-20 17:38:39,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-20 17:38:39,776 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 630 transitions, 9573 flow [2024-06-20 17:38:39,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:39,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:39,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:38:39,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 17:38:39,777 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:38:39,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1686887340, now seen corresponding path program 3 times [2024-06-20 17:38:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:39,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413954170] [2024-06-20 17:38:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:40,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413954170] [2024-06-20 17:38:40,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413954170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:40,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:40,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:38:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752431628] [2024-06-20 17:38:40,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:40,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:38:40,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:40,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:38:40,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:38:40,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:38:40,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 630 transitions, 9573 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:40,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:40,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:38:40,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:42,626 INFO L124 PetriNetUnfolderBase]: 4747/7456 cut-off events. [2024-06-20 17:38:42,627 INFO L125 PetriNetUnfolderBase]: For 1986187/1986187 co-relation queries the response was YES. [2024-06-20 17:38:42,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79120 conditions, 7456 events. 4747/7456 cut-off events. For 1986187/1986187 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46750 event pairs, 974 based on Foata normal form. 2/7455 useless extension candidates. Maximal degree in co-relation 78908. Up to 7103 conditions per place. [2024-06-20 17:38:42,742 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 598 selfloop transitions, 44 changer transitions 0/647 dead transitions. [2024-06-20 17:38:42,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 647 transitions, 11009 flow [2024-06-20 17:38:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:38:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:38:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 17:38:42,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 17:38:42,743 INFO L175 Difference]: Start difference. First operand has 453 places, 630 transitions, 9573 flow. Second operand 7 states and 117 transitions. [2024-06-20 17:38:42,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 647 transitions, 11009 flow [2024-06-20 17:38:50,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 647 transitions, 10877 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 17:38:50,777 INFO L231 Difference]: Finished difference. Result has 456 places, 634 transitions, 9664 flow [2024-06-20 17:38:50,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9441, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9664, PETRI_PLACES=456, PETRI_TRANSITIONS=634} [2024-06-20 17:38:50,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-20 17:38:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 634 transitions, 9664 flow [2024-06-20 17:38:50,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:50,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:38:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:38:50,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 17:38:50,778 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:38:50,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:38:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1395748710, now seen corresponding path program 4 times [2024-06-20 17:38:50,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:38:50,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200232468] [2024-06-20 17:38:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:38:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:38:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:38:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:38:51,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:38:51,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200232468] [2024-06-20 17:38:51,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200232468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:38:51,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:38:51,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:38:51,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244328188] [2024-06-20 17:38:51,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:38:51,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:38:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:38:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:38:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:38:51,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:38:51,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 634 transitions, 9664 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:38:51,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:38:51,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:38:51,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:38:53,811 INFO L124 PetriNetUnfolderBase]: 4757/7477 cut-off events. [2024-06-20 17:38:53,811 INFO L125 PetriNetUnfolderBase]: For 2015969/2015971 co-relation queries the response was YES. [2024-06-20 17:38:53,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79597 conditions, 7477 events. 4757/7477 cut-off events. For 2015969/2015971 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46946 event pairs, 933 based on Foata normal form. 2/7479 useless extension candidates. Maximal degree in co-relation 79383. Up to 6815 conditions per place. [2024-06-20 17:38:53,929 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 563 selfloop transitions, 106 changer transitions 0/674 dead transitions. [2024-06-20 17:38:53,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 674 transitions, 11283 flow [2024-06-20 17:38:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:38:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:38:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:38:53,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:38:53,930 INFO L175 Difference]: Start difference. First operand has 456 places, 634 transitions, 9664 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:38:53,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 674 transitions, 11283 flow [2024-06-20 17:39:00,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 674 transitions, 11152 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-20 17:39:00,952 INFO L231 Difference]: Finished difference. Result has 464 places, 643 transitions, 9941 flow [2024-06-20 17:39:00,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9533, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9941, PETRI_PLACES=464, PETRI_TRANSITIONS=643} [2024-06-20 17:39:00,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 17:39:00,953 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 643 transitions, 9941 flow [2024-06-20 17:39:00,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:00,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:00,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:39:00,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 17:39:00,954 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:39:00,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1629052806, now seen corresponding path program 5 times [2024-06-20 17:39:00,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:00,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110647304] [2024-06-20 17:39:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:00,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:01,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:01,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110647304] [2024-06-20 17:39:01,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110647304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:01,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:39:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657818558] [2024-06-20 17:39:01,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:39:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:39:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:39:01,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:39:01,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 643 transitions, 9941 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:01,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:01,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:39:01,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:04,069 INFO L124 PetriNetUnfolderBase]: 4783/7515 cut-off events. [2024-06-20 17:39:04,069 INFO L125 PetriNetUnfolderBase]: For 2073732/2073734 co-relation queries the response was YES. [2024-06-20 17:39:04,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82243 conditions, 7515 events. 4783/7515 cut-off events. For 2073732/2073734 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 47199 event pairs, 937 based on Foata normal form. 2/7517 useless extension candidates. Maximal degree in co-relation 82025. Up to 6814 conditions per place. [2024-06-20 17:39:04,188 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 559 selfloop transitions, 115 changer transitions 0/679 dead transitions. [2024-06-20 17:39:04,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 679 transitions, 11958 flow [2024-06-20 17:39:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:39:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:39:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:39:04,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:39:04,189 INFO L175 Difference]: Start difference. First operand has 464 places, 643 transitions, 9941 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:39:04,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 679 transitions, 11958 flow [2024-06-20 17:39:10,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 679 transitions, 11709 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 17:39:10,641 INFO L231 Difference]: Finished difference. Result has 469 places, 649 transitions, 10178 flow [2024-06-20 17:39:10,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9692, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10178, PETRI_PLACES=469, PETRI_TRANSITIONS=649} [2024-06-20 17:39:10,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 17:39:10,641 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 649 transitions, 10178 flow [2024-06-20 17:39:10,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:10,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:10,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:39:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 17:39:10,642 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:39:10,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:10,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1419390816, now seen corresponding path program 6 times [2024-06-20 17:39:10,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:10,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345802981] [2024-06-20 17:39:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:10,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345802981] [2024-06-20 17:39:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345802981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:11,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:11,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:39:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533878673] [2024-06-20 17:39:11,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:11,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:39:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:39:11,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:39:11,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:39:11,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 649 transitions, 10178 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:11,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:11,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:39:11,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:13,650 INFO L124 PetriNetUnfolderBase]: 4777/7508 cut-off events. [2024-06-20 17:39:13,650 INFO L125 PetriNetUnfolderBase]: For 2083268/2083270 co-relation queries the response was YES. [2024-06-20 17:39:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82424 conditions, 7508 events. 4777/7508 cut-off events. For 2083268/2083270 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 47162 event pairs, 946 based on Foata normal form. 2/7510 useless extension candidates. Maximal degree in co-relation 82205. Up to 6843 conditions per place. [2024-06-20 17:39:13,902 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 105 changer transitions 0/678 dead transitions. [2024-06-20 17:39:13,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 678 transitions, 11650 flow [2024-06-20 17:39:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:39:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:39:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:39:13,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:39:13,903 INFO L175 Difference]: Start difference. First operand has 469 places, 649 transitions, 10178 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:39:13,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 678 transitions, 11650 flow [2024-06-20 17:39:23,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 678 transitions, 11318 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-20 17:39:23,807 INFO L231 Difference]: Finished difference. Result has 473 places, 649 transitions, 10066 flow [2024-06-20 17:39:23,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9850, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10066, PETRI_PLACES=473, PETRI_TRANSITIONS=649} [2024-06-20 17:39:23,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:39:23,808 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 649 transitions, 10066 flow [2024-06-20 17:39:23,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:23,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:23,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:39:23,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 17:39:23,808 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:39:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1610967772, now seen corresponding path program 4 times [2024-06-20 17:39:23,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:23,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859100275] [2024-06-20 17:39:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:23,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:24,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859100275] [2024-06-20 17:39:24,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859100275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:24,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:24,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:39:24,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090882289] [2024-06-20 17:39:24,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:24,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:39:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:24,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:39:24,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:39:24,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:39:24,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 649 transitions, 10066 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:24,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:24,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:39:24,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:26,758 INFO L124 PetriNetUnfolderBase]: 4782/7507 cut-off events. [2024-06-20 17:39:26,758 INFO L125 PetriNetUnfolderBase]: For 2093138/2093138 co-relation queries the response was YES. [2024-06-20 17:39:26,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82200 conditions, 7507 events. 4782/7507 cut-off events. For 2093138/2093138 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 47167 event pairs, 951 based on Foata normal form. 1/7505 useless extension candidates. Maximal degree in co-relation 81979. Up to 7146 conditions per place. [2024-06-20 17:39:26,881 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 615 selfloop transitions, 52 changer transitions 0/672 dead transitions. [2024-06-20 17:39:26,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 672 transitions, 11560 flow [2024-06-20 17:39:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:39:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:39:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 17:39:26,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 17:39:26,882 INFO L175 Difference]: Start difference. First operand has 473 places, 649 transitions, 10066 flow. Second operand 8 states and 134 transitions. [2024-06-20 17:39:26,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 672 transitions, 11560 flow [2024-06-20 17:39:35,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 672 transitions, 11300 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 17:39:35,417 INFO L231 Difference]: Finished difference. Result has 473 places, 652 transitions, 10002 flow [2024-06-20 17:39:35,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9806, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10002, PETRI_PLACES=473, PETRI_TRANSITIONS=652} [2024-06-20 17:39:35,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 17:39:35,418 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 652 transitions, 10002 flow [2024-06-20 17:39:35,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:35,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:35,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:39:35,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 17:39:35,418 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:39:35,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:35,419 INFO L85 PathProgramCache]: Analyzing trace with hash -617886592, now seen corresponding path program 7 times [2024-06-20 17:39:35,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:35,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929851294] [2024-06-20 17:39:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:35,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:36,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929851294] [2024-06-20 17:39:36,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929851294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:36,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:36,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:39:36,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589274222] [2024-06-20 17:39:36,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:36,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:39:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:39:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:39:36,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:39:36,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 652 transitions, 10002 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:36,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:36,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:39:36,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:38,482 INFO L124 PetriNetUnfolderBase]: 4800/7544 cut-off events. [2024-06-20 17:39:38,483 INFO L125 PetriNetUnfolderBase]: For 2145416/2145418 co-relation queries the response was YES. [2024-06-20 17:39:38,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82739 conditions, 7544 events. 4800/7544 cut-off events. For 2145416/2145418 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 47443 event pairs, 946 based on Foata normal form. 2/7546 useless extension candidates. Maximal degree in co-relation 82518. Up to 6854 conditions per place. [2024-06-20 17:39:38,610 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 566 selfloop transitions, 115 changer transitions 0/686 dead transitions. [2024-06-20 17:39:38,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 686 transitions, 12034 flow [2024-06-20 17:39:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:39:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:39:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 17:39:38,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 17:39:38,612 INFO L175 Difference]: Start difference. First operand has 473 places, 652 transitions, 10002 flow. Second operand 9 states and 165 transitions. [2024-06-20 17:39:38,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 686 transitions, 12034 flow [2024-06-20 17:39:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 686 transitions, 11871 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 17:39:47,755 INFO L231 Difference]: Finished difference. Result has 476 places, 658 transitions, 10337 flow [2024-06-20 17:39:47,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9839, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10337, PETRI_PLACES=476, PETRI_TRANSITIONS=658} [2024-06-20 17:39:47,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-20 17:39:47,756 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 658 transitions, 10337 flow [2024-06-20 17:39:47,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:47,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:47,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:39:47,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 17:39:47,756 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:39:47,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1935708706, now seen corresponding path program 8 times [2024-06-20 17:39:47,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:47,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304012966] [2024-06-20 17:39:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:48,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:48,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304012966] [2024-06-20 17:39:48,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304012966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:48,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:48,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:39:48,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031580870] [2024-06-20 17:39:48,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:48,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:39:48,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:39:48,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:39:48,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:39:48,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 658 transitions, 10337 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:48,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:48,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:39:48,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:39:50,808 INFO L124 PetriNetUnfolderBase]: 4826/7586 cut-off events. [2024-06-20 17:39:50,808 INFO L125 PetriNetUnfolderBase]: For 2207497/2207499 co-relation queries the response was YES. [2024-06-20 17:39:50,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84540 conditions, 7586 events. 4826/7586 cut-off events. For 2207497/2207499 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 47793 event pairs, 937 based on Foata normal form. 2/7588 useless extension candidates. Maximal degree in co-relation 84318. Up to 6799 conditions per place. [2024-06-20 17:39:51,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 547 selfloop transitions, 139 changer transitions 0/691 dead transitions. [2024-06-20 17:39:51,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 691 transitions, 12687 flow [2024-06-20 17:39:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:39:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:39:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 17:39:51,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:39:51,076 INFO L175 Difference]: Start difference. First operand has 476 places, 658 transitions, 10337 flow. Second operand 9 states and 164 transitions. [2024-06-20 17:39:51,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 691 transitions, 12687 flow [2024-06-20 17:39:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 691 transitions, 12409 flow, removed 80 selfloop flow, removed 5 redundant places. [2024-06-20 17:39:58,495 INFO L231 Difference]: Finished difference. Result has 480 places, 664 transitions, 10617 flow [2024-06-20 17:39:58,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10059, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10617, PETRI_PLACES=480, PETRI_TRANSITIONS=664} [2024-06-20 17:39:58,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 17:39:58,495 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 664 transitions, 10617 flow [2024-06-20 17:39:58,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:58,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:39:58,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:39:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 17:39:58,496 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:39:58,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:39:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1280624452, now seen corresponding path program 5 times [2024-06-20 17:39:58,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:39:58,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266093178] [2024-06-20 17:39:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:39:58,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:39:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:39:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:39:59,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:39:59,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266093178] [2024-06-20 17:39:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266093178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:39:59,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:39:59,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:39:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951751464] [2024-06-20 17:39:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:39:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:39:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:39:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:39:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:39:59,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:39:59,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 664 transitions, 10617 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:39:59,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:39:59,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:39:59,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:01,505 INFO L124 PetriNetUnfolderBase]: 4831/7585 cut-off events. [2024-06-20 17:40:01,505 INFO L125 PetriNetUnfolderBase]: For 2227841/2227841 co-relation queries the response was YES. [2024-06-20 17:40:01,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85413 conditions, 7585 events. 4831/7585 cut-off events. For 2227841/2227841 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 47757 event pairs, 954 based on Foata normal form. 1/7583 useless extension candidates. Maximal degree in co-relation 85189. Up to 7150 conditions per place. [2024-06-20 17:40:01,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 603 selfloop transitions, 77 changer transitions 0/685 dead transitions. [2024-06-20 17:40:01,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 685 transitions, 12431 flow [2024-06-20 17:40:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:40:01,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:40:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:40:01,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:40:01,637 INFO L175 Difference]: Start difference. First operand has 480 places, 664 transitions, 10617 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:40:01,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 685 transitions, 12431 flow [2024-06-20 17:40:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 685 transitions, 11957 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-20 17:40:09,404 INFO L231 Difference]: Finished difference. Result has 481 places, 667 transitions, 10390 flow [2024-06-20 17:40:09,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10143, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10390, PETRI_PLACES=481, PETRI_TRANSITIONS=667} [2024-06-20 17:40:09,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 17:40:09,405 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 667 transitions, 10390 flow [2024-06-20 17:40:09,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:09,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:09,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:40:09,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 17:40:09,405 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:09,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash -606839122, now seen corresponding path program 9 times [2024-06-20 17:40:09,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:09,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002027706] [2024-06-20 17:40:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:09,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002027706] [2024-06-20 17:40:10,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002027706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:10,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:10,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:40:10,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983935008] [2024-06-20 17:40:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:40:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:40:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:40:10,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:40:10,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 667 transitions, 10390 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:10,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:10,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:40:10,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:12,483 INFO L124 PetriNetUnfolderBase]: 4833/7606 cut-off events. [2024-06-20 17:40:12,483 INFO L125 PetriNetUnfolderBase]: For 2231843/2231845 co-relation queries the response was YES. [2024-06-20 17:40:12,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83465 conditions, 7606 events. 4833/7606 cut-off events. For 2231843/2231845 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 48055 event pairs, 946 based on Foata normal form. 2/7608 useless extension candidates. Maximal degree in co-relation 83241. Up to 6810 conditions per place. [2024-06-20 17:40:12,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 549 selfloop transitions, 142 changer transitions 0/696 dead transitions. [2024-06-20 17:40:12,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 696 transitions, 12282 flow [2024-06-20 17:40:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:40:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:40:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 17:40:12,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 17:40:12,609 INFO L175 Difference]: Start difference. First operand has 481 places, 667 transitions, 10390 flow. Second operand 9 states and 163 transitions. [2024-06-20 17:40:12,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 696 transitions, 12282 flow [2024-06-20 17:40:21,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 696 transitions, 12069 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 17:40:21,930 INFO L231 Difference]: Finished difference. Result has 485 places, 670 transitions, 10563 flow [2024-06-20 17:40:21,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10177, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10563, PETRI_PLACES=485, PETRI_TRANSITIONS=670} [2024-06-20 17:40:21,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-20 17:40:21,931 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 670 transitions, 10563 flow [2024-06-20 17:40:21,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:21,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:21,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:40:21,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 17:40:21,931 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:21,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:21,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1382571630, now seen corresponding path program 6 times [2024-06-20 17:40:21,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:21,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103482250] [2024-06-20 17:40:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:21,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:22,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:22,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103482250] [2024-06-20 17:40:22,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103482250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:22,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:22,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:40:22,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539736468] [2024-06-20 17:40:22,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:40:22,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:40:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:40:22,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:40:22,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 670 transitions, 10563 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:22,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:22,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:40:22,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:24,854 INFO L124 PetriNetUnfolderBase]: 4830/7586 cut-off events. [2024-06-20 17:40:24,854 INFO L125 PetriNetUnfolderBase]: For 2237068/2237068 co-relation queries the response was YES. [2024-06-20 17:40:24,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83619 conditions, 7586 events. 4830/7586 cut-off events. For 2237068/2237068 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 47776 event pairs, 951 based on Foata normal form. 1/7584 useless extension candidates. Maximal degree in co-relation 83394. Up to 7150 conditions per place. [2024-06-20 17:40:24,977 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 600 selfloop transitions, 82 changer transitions 0/687 dead transitions. [2024-06-20 17:40:24,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 687 transitions, 11994 flow [2024-06-20 17:40:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:40:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:40:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 17:40:24,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 17:40:24,979 INFO L175 Difference]: Start difference. First operand has 485 places, 670 transitions, 10563 flow. Second operand 8 states and 136 transitions. [2024-06-20 17:40:24,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 687 transitions, 11994 flow [2024-06-20 17:40:34,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 687 transitions, 11639 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-20 17:40:34,956 INFO L231 Difference]: Finished difference. Result has 487 places, 670 transitions, 10378 flow [2024-06-20 17:40:34,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10208, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10378, PETRI_PLACES=487, PETRI_TRANSITIONS=670} [2024-06-20 17:40:34,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 17:40:34,957 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 670 transitions, 10378 flow [2024-06-20 17:40:34,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:34,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:34,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:40:34,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 17:40:34,958 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:34,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1953858536, now seen corresponding path program 7 times [2024-06-20 17:40:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:34,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849917363] [2024-06-20 17:40:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:35,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:35,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849917363] [2024-06-20 17:40:35,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849917363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:35,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:35,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:40:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583518458] [2024-06-20 17:40:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:40:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:40:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:40:35,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:40:35,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 670 transitions, 10378 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:35,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:35,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:40:35,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:37,891 INFO L124 PetriNetUnfolderBase]: 4843/7607 cut-off events. [2024-06-20 17:40:37,892 INFO L125 PetriNetUnfolderBase]: For 2275659/2275663 co-relation queries the response was YES. [2024-06-20 17:40:37,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83792 conditions, 7607 events. 4843/7607 cut-off events. For 2275659/2275663 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47978 event pairs, 980 based on Foata normal form. 5/7609 useless extension candidates. Maximal degree in co-relation 83566. Up to 7032 conditions per place. [2024-06-20 17:40:38,019 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 149 changer transitions 0/691 dead transitions. [2024-06-20 17:40:38,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 691 transitions, 12571 flow [2024-06-20 17:40:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:40:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:40:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 17:40:38,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 17:40:38,020 INFO L175 Difference]: Start difference. First operand has 487 places, 670 transitions, 10378 flow. Second operand 8 states and 138 transitions. [2024-06-20 17:40:38,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 691 transitions, 12571 flow [2024-06-20 17:40:46,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 691 transitions, 12344 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:40:46,698 INFO L231 Difference]: Finished difference. Result has 487 places, 676 transitions, 10613 flow [2024-06-20 17:40:46,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10151, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10613, PETRI_PLACES=487, PETRI_TRANSITIONS=676} [2024-06-20 17:40:46,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 17:40:46,699 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 676 transitions, 10613 flow [2024-06-20 17:40:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:46,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:46,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:40:46,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 17:40:46,699 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:46,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash 943169044, now seen corresponding path program 10 times [2024-06-20 17:40:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893082333] [2024-06-20 17:40:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:47,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:47,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893082333] [2024-06-20 17:40:47,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893082333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:47,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:47,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:40:47,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316847866] [2024-06-20 17:40:47,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:47,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:40:47,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:40:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:40:47,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:40:47,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 676 transitions, 10613 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:47,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:47,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:40:47,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:40:49,813 INFO L124 PetriNetUnfolderBase]: 4885/7684 cut-off events. [2024-06-20 17:40:49,814 INFO L125 PetriNetUnfolderBase]: For 2370401/2370403 co-relation queries the response was YES. [2024-06-20 17:40:49,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85705 conditions, 7684 events. 4885/7684 cut-off events. For 2370401/2370403 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 48556 event pairs, 960 based on Foata normal form. 2/7686 useless extension candidates. Maximal degree in co-relation 85478. Up to 6744 conditions per place. [2024-06-20 17:40:49,940 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 521 selfloop transitions, 182 changer transitions 0/708 dead transitions. [2024-06-20 17:40:49,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 708 transitions, 13095 flow [2024-06-20 17:40:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:40:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:40:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 17:40:49,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 17:40:49,942 INFO L175 Difference]: Start difference. First operand has 487 places, 676 transitions, 10613 flow. Second operand 9 states and 160 transitions. [2024-06-20 17:40:49,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 708 transitions, 13095 flow [2024-06-20 17:40:59,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 708 transitions, 12653 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 17:40:59,049 INFO L231 Difference]: Finished difference. Result has 490 places, 685 transitions, 10913 flow [2024-06-20 17:40:59,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10171, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10913, PETRI_PLACES=490, PETRI_TRANSITIONS=685} [2024-06-20 17:40:59,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-20 17:40:59,050 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 685 transitions, 10913 flow [2024-06-20 17:40:59,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:59,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:40:59,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:40:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 17:40:59,050 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:40:59,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:40:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1382062128, now seen corresponding path program 8 times [2024-06-20 17:40:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:40:59,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890963133] [2024-06-20 17:40:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:40:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:40:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:40:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:40:59,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:40:59,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890963133] [2024-06-20 17:40:59,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890963133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:40:59,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:40:59,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:40:59,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568605579] [2024-06-20 17:40:59,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:40:59,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:40:59,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:40:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:40:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:40:59,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:40:59,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 685 transitions, 10913 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:40:59,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:40:59,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:40:59,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:41:02,184 INFO L124 PetriNetUnfolderBase]: 4895/7686 cut-off events. [2024-06-20 17:41:02,184 INFO L125 PetriNetUnfolderBase]: For 2393549/2393549 co-relation queries the response was YES. [2024-06-20 17:41:02,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86459 conditions, 7686 events. 4895/7686 cut-off events. For 2393549/2393549 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 48491 event pairs, 974 based on Foata normal form. 1/7684 useless extension candidates. Maximal degree in co-relation 86232. Up to 7353 conditions per place. [2024-06-20 17:41:02,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 651 selfloop transitions, 47 changer transitions 0/703 dead transitions. [2024-06-20 17:41:02,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 703 transitions, 12464 flow [2024-06-20 17:41:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:41:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:41:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-20 17:41:02,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-20 17:41:02,310 INFO L175 Difference]: Start difference. First operand has 490 places, 685 transitions, 10913 flow. Second operand 8 states and 131 transitions. [2024-06-20 17:41:02,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 703 transitions, 12464 flow [2024-06-20 17:41:09,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 703 transitions, 12176 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-20 17:41:09,982 INFO L231 Difference]: Finished difference. Result has 494 places, 691 transitions, 10844 flow [2024-06-20 17:41:09,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10625, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10844, PETRI_PLACES=494, PETRI_TRANSITIONS=691} [2024-06-20 17:41:09,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 17:41:09,983 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 691 transitions, 10844 flow [2024-06-20 17:41:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:41:09,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:41:09,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:41:09,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 17:41:09,983 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:41:09,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:41:09,984 INFO L85 PathProgramCache]: Analyzing trace with hash 795791200, now seen corresponding path program 9 times [2024-06-20 17:41:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:41:09,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835584601] [2024-06-20 17:41:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:41:09,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:41:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:41:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:41:10,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:41:10,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835584601] [2024-06-20 17:41:10,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835584601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:41:10,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:41:10,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:41:10,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874620131] [2024-06-20 17:41:10,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:41:10,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:41:10,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:41:10,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:41:10,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:41:10,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 17:41:10,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 691 transitions, 10844 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:41:10,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:41:10,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 17:41:10,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:41:13,009 INFO L124 PetriNetUnfolderBase]: 4900/7693 cut-off events. [2024-06-20 17:41:13,010 INFO L125 PetriNetUnfolderBase]: For 2411898/2411898 co-relation queries the response was YES. [2024-06-20 17:41:13,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85998 conditions, 7693 events. 4900/7693 cut-off events. For 2411898/2411898 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 48522 event pairs, 969 based on Foata normal form. 1/7691 useless extension candidates. Maximal degree in co-relation 85769. Up to 7342 conditions per place. [2024-06-20 17:41:13,141 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 647 selfloop transitions, 57 changer transitions 0/709 dead transitions. [2024-06-20 17:41:13,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 709 transitions, 12687 flow [2024-06-20 17:41:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:41:13,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:41:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-20 17:41:13,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-20 17:41:13,142 INFO L175 Difference]: Start difference. First operand has 494 places, 691 transitions, 10844 flow. Second operand 10 states and 158 transitions. [2024-06-20 17:41:13,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 709 transitions, 12687 flow