./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.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/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:38:36,749 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:38:36,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:38:36,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:38:36,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:38:36,854 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:38:36,854 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:38:36,855 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:38:36,855 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:38:36,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:38:36,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:38:36,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:38:36,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:38:36,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:38:36,861 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:38:36,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:38:36,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:38:36,861 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:38:36,862 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:38:36,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:38:36,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:38:36,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:38:36,863 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:38:36,863 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:38:36,863 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:38:36,863 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:38:36,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:38:36,864 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:38:36,864 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:38:36,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:38:36,865 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:38:36,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:38:36,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:38:36,866 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:38:36,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:38:36,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:38:36,866 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:38:36,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:38:36,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:38:36,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:38:36,867 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:38:36,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:38:36,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:38:36,867 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:38:37,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:38:37,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:38:37,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:38:37,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:38:37,129 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:38:37,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:38:38,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:38:38,622 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:38:38,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:38:38,647 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131094c45/76a4013b13fa4c05ad65678b262b61a4/FLAGc3beb8d6b [2024-06-14 12:38:38,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131094c45/76a4013b13fa4c05ad65678b262b61a4 [2024-06-14 12:38:38,660 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:38:38,661 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:38:38,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:38:38,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:38:38,849 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:38:38,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:38:38,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:38:38,853 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:38:38,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:38:38" (1/2) ... [2024-06-14 12:38:38,854 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb5f000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:38:38, skipping insertion in model container [2024-06-14 12:38:38,855 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:38:38" (1/2) ... [2024-06-14 12:38:38,856 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@14410142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:38:38, skipping insertion in model container [2024-06-14 12:38:38,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:38" (2/2) ... [2024-06-14 12:38:38,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb5f000 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:38, skipping insertion in model container [2024-06-14 12:38:38,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:38" (2/2) ... [2024-06-14 12:38:38,858 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:38:38,920 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:38:38,921 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] ((((((((((((((((! 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 <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 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$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 12:38:38,921 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] ((((((((((((((((! multithreaded || y$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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$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))) [2024-06-14 12:38:38,922 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 <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 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))) [2024-06-14 12:38:38,922 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:38:38,922 INFO L106 edCorrectnessWitness]: ghost_update [L814-L814] multithreaded = 1; [2024-06-14 12:38:38,956 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:38:39,339 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:38:39,353 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:38:39,514 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:38:39,570 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:38:39,572 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39 WrapperNode [2024-06-14 12:38:39,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:38:39,573 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:38:39,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:38:39,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:38:39,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,639 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 12:38:39,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:38:39,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:38:39,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:38:39,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:38:39,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,682 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:38:39,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,693 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:38:39,698 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:38:39,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:38:39,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:38:39,699 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (1/1) ... [2024-06-14 12:38:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:38:39,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:38:39,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:38:39,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:38:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:38:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:38:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:38:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:38:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:38:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:38:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:38:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:38:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:38:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:38:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:38:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:38:39,767 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:38:39,857 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:38:39,858 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:38:40,207 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:38:40,207 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:38:40,382 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:38:40,382 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:38:40,383 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:38:40 BoogieIcfgContainer [2024-06-14 12:38:40,383 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:38:40,385 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:38:40,385 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:38:40,388 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:38:40,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:38:38" (1/4) ... [2024-06-14 12:38:40,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe1359 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:38:40, skipping insertion in model container [2024-06-14 12:38:40,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:38:38" (2/4) ... [2024-06-14 12:38:40,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe1359 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:38:40, skipping insertion in model container [2024-06-14 12:38:40,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:38:39" (3/4) ... [2024-06-14 12:38:40,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe1359 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:38:40, skipping insertion in model container [2024-06-14 12:38:40,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:38:40" (4/4) ... [2024-06-14 12:38:40,391 INFO L112 eAbstractionObserver]: Analyzing ICFG mix056_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:38:40,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:38:40,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:38:40,405 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:38:40,443 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:38:40,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:38:40,496 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:38:40,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:38:40,499 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 4. Compared 62 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. [2024-06-14 12:38:40,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:38:40,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:38:40,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:38:40,524 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;@7ac38c45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:38:40,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:38:40,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:38:40,533 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:38:40,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:38:40,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:40,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:38:40,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:40,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:40,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1624549176, now seen corresponding path program 1 times [2024-06-14 12:38:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:40,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130333900] [2024-06-14 12:38:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:40,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:41,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130333900] [2024-06-14 12:38:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130333900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:41,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:41,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:38:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581329984] [2024-06-14 12:38:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:38:41,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:38:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:38:41,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:38:41,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:41,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:41,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:38:41,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:42,102 INFO L124 PetriNetUnfolderBase]: 1152/1803 cut-off events. [2024-06-14 12:38:42,103 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:38:42,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3622 conditions, 1803 events. 1152/1803 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8671 event pairs, 785 based on Foata normal form. 1/1759 useless extension candidates. Maximal degree in co-relation 3607. Up to 1732 conditions per place. [2024-06-14 12:38:42,138 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 12:38:42,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-14 12:38:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:38:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:38:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-14 12:38:42,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 12:38:42,151 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 70 transitions. [2024-06-14 12:38:42,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-14 12:38:42,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:42,159 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:38:42,161 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} [2024-06-14 12:38:42,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:38:42,167 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:38:42,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:42,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:42,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:42,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:38:42,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:42,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2118585753, now seen corresponding path program 1 times [2024-06-14 12:38:42,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:42,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058433029] [2024-06-14 12:38:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:42,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:42,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:42,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058433029] [2024-06-14 12:38:42,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058433029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:42,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:38:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891372382] [2024-06-14 12:38:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:38:42,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:38:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:38:42,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:42,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:42,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:42,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:42,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:42,994 INFO L124 PetriNetUnfolderBase]: 1353/2041 cut-off events. [2024-06-14 12:38:42,994 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-14 12:38:42,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2041 events. 1353/2041 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9444 event pairs, 795 based on Foata normal form. 3/2043 useless extension candidates. Maximal degree in co-relation 4684. Up to 2005 conditions per place. [2024-06-14 12:38:43,005 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-14 12:38:43,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 242 flow [2024-06-14 12:38:43,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:38:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:38:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-06-14 12:38:43,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 12:38:43,009 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 87 transitions. [2024-06-14 12:38:43,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 242 flow [2024-06-14 12:38:43,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:38:43,011 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-14 12:38:43,012 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} [2024-06-14 12:38:43,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-14 12:38:43,013 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-14 12:38:43,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:43,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:43,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:43,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:38:43,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:43,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:43,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1251647469, now seen corresponding path program 1 times [2024-06-14 12:38:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:43,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651466702] [2024-06-14 12:38:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:43,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:43,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:43,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651466702] [2024-06-14 12:38:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651466702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:43,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:43,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:38:43,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16740710] [2024-06-14 12:38:43,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:43,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:38:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:38:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:38:43,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:43,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:43,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:43,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:43,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:43,908 INFO L124 PetriNetUnfolderBase]: 1361/2061 cut-off events. [2024-06-14 12:38:43,909 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-14 12:38:43,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5273 conditions, 2061 events. 1361/2061 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9683 event pairs, 569 based on Foata normal form. 5/2064 useless extension candidates. Maximal degree in co-relation 5256. Up to 1951 conditions per place. [2024-06-14 12:38:43,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-14 12:38:43,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 396 flow [2024-06-14 12:38:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-14 12:38:43,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 12:38:43,922 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 114 transitions. [2024-06-14 12:38:43,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 396 flow [2024-06-14 12:38:43,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:38:43,925 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-14 12:38:43,925 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-14 12:38:43,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 12:38:43,926 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-14 12:38:43,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:43,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:43,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:43,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:38:43,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:43,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:43,927 INFO L85 PathProgramCache]: Analyzing trace with hash -242922564, now seen corresponding path program 1 times [2024-06-14 12:38:43,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:43,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360961677] [2024-06-14 12:38:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:43,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:44,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360961677] [2024-06-14 12:38:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360961677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:44,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:44,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:44,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374218802] [2024-06-14 12:38:44,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:44,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:44,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:44,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:44,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:44,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 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) [2024-06-14 12:38:44,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:44,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:44,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:44,894 INFO L124 PetriNetUnfolderBase]: 1373/2081 cut-off events. [2024-06-14 12:38:44,895 INFO L125 PetriNetUnfolderBase]: For 2777/2780 co-relation queries the response was YES. [2024-06-14 12:38:44,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6303 conditions, 2081 events. 1373/2081 cut-off events. For 2777/2780 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9787 event pairs, 405 based on Foata normal form. 12/2091 useless extension candidates. Maximal degree in co-relation 6283. Up to 1919 conditions per place. [2024-06-14 12:38:44,908 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-14 12:38:44,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 499 flow [2024-06-14 12:38:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 12:38:44,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 12:38:44,912 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 130 transitions. [2024-06-14 12:38:44,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 499 flow [2024-06-14 12:38:44,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 491 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:38:44,920 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-14 12:38:44,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 12:38:44,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 12:38:44,922 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-14 12:38:44,922 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) [2024-06-14 12:38:44,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:44,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:38:44,923 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:44,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1166650499, now seen corresponding path program 1 times [2024-06-14 12:38:44,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:44,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447862549] [2024-06-14 12:38:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:44,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447862549] [2024-06-14 12:38:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447862549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:45,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:45,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359842495] [2024-06-14 12:38:45,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:45,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:45,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:45,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:45,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:45,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:45,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:45,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:45,854 INFO L124 PetriNetUnfolderBase]: 1161/1822 cut-off events. [2024-06-14 12:38:45,854 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2024-06-14 12:38:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5997 conditions, 1822 events. 1161/1822 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8811 event pairs, 463 based on Foata normal form. 2/1823 useless extension candidates. Maximal degree in co-relation 5974. Up to 1739 conditions per place. [2024-06-14 12:38:45,865 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-14 12:38:45,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 433 flow [2024-06-14 12:38:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:38:45,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:38:45,866 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:38:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 433 flow [2024-06-14 12:38:45,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 383 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:45,873 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-14 12:38:45,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-14 12:38:45,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-14 12:38:45,875 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-14 12:38:45,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:45,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:45,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:38:45,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:45,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:45,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1840589541, now seen corresponding path program 1 times [2024-06-14 12:38:45,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:45,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233111485] [2024-06-14 12:38:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:46,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233111485] [2024-06-14 12:38:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233111485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:46,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752132072] [2024-06-14 12:38:46,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:46,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:46,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:46,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:46,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:46,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:46,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:46,958 INFO L124 PetriNetUnfolderBase]: 1151/1844 cut-off events. [2024-06-14 12:38:46,958 INFO L125 PetriNetUnfolderBase]: For 4007/4007 co-relation queries the response was YES. [2024-06-14 12:38:46,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 1844 events. 1151/1844 cut-off events. For 4007/4007 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8925 event pairs, 433 based on Foata normal form. 4/1847 useless extension candidates. Maximal degree in co-relation 5960. Up to 1707 conditions per place. [2024-06-14 12:38:46,968 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-14 12:38:46,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 453 flow [2024-06-14 12:38:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:38:46,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:38:46,970 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:38:46,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 453 flow [2024-06-14 12:38:46,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 431 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:46,975 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-14 12:38:46,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-14 12:38:46,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 12:38:46,977 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-14 12:38:46,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:46,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:46,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:46,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:38:46,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:46,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:46,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1229421638, now seen corresponding path program 1 times [2024-06-14 12:38:46,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:46,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649533882] [2024-06-14 12:38:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:46,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:47,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:47,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649533882] [2024-06-14 12:38:47,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649533882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:47,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:47,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027076833] [2024-06-14 12:38:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:47,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:47,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:47,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:47,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:47,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:47,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:48,193 INFO L124 PetriNetUnfolderBase]: 1364/2069 cut-off events. [2024-06-14 12:38:48,193 INFO L125 PetriNetUnfolderBase]: For 6216/6222 co-relation queries the response was YES. [2024-06-14 12:38:48,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7354 conditions, 2069 events. 1364/2069 cut-off events. For 6216/6222 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9635 event pairs, 539 based on Foata normal form. 8/2075 useless extension candidates. Maximal degree in co-relation 7329. Up to 1956 conditions per place. [2024-06-14 12:38:48,209 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-14 12:38:48,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 539 flow [2024-06-14 12:38:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:38:48,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:38:48,212 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:38:48,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 539 flow [2024-06-14 12:38:48,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 509 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:48,219 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-14 12:38:48,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, 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=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-14 12:38:48,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:38:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-14 12:38:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:48,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:48,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:48,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:38:48,221 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:48,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -164637668, now seen corresponding path program 2 times [2024-06-14 12:38:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:48,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803854218] [2024-06-14 12:38:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:48,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803854218] [2024-06-14 12:38:48,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803854218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:38:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025549454] [2024-06-14 12:38:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:38:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:38:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:38:48,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:48,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:48,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:48,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:48,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:49,282 INFO L124 PetriNetUnfolderBase]: 1352/2042 cut-off events. [2024-06-14 12:38:49,283 INFO L125 PetriNetUnfolderBase]: For 7414/7414 co-relation queries the response was YES. [2024-06-14 12:38:49,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7493 conditions, 2042 events. 1352/2042 cut-off events. For 7414/7414 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9444 event pairs, 553 based on Foata normal form. 2/2039 useless extension candidates. Maximal degree in co-relation 7467. Up to 1940 conditions per place. [2024-06-14 12:38:49,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 48 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2024-06-14 12:38:49,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 513 flow [2024-06-14 12:38:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:38:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:38:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:38:49,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:38:49,298 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:38:49,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 513 flow [2024-06-14 12:38:49,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 484 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:49,304 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 358 flow [2024-06-14 12:38:49,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-14 12:38:49,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-14 12:38:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 358 flow [2024-06-14 12:38:49,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:49,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:49,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:49,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:38:49,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:49,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash -169012516, now seen corresponding path program 1 times [2024-06-14 12:38:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:49,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231111079] [2024-06-14 12:38:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:50,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231111079] [2024-06-14 12:38:50,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231111079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:50,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591318252] [2024-06-14 12:38:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:50,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:50,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:50,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:50,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:50,554 INFO L124 PetriNetUnfolderBase]: 1526/2313 cut-off events. [2024-06-14 12:38:50,555 INFO L125 PetriNetUnfolderBase]: For 10062/10062 co-relation queries the response was YES. [2024-06-14 12:38:50,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8839 conditions, 2313 events. 1526/2313 cut-off events. For 10062/10062 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10888 event pairs, 466 based on Foata normal form. 8/2317 useless extension candidates. Maximal degree in co-relation 8812. Up to 1940 conditions per place. [2024-06-14 12:38:50,568 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 79 selfloop transitions, 39 changer transitions 0/122 dead transitions. [2024-06-14 12:38:50,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 122 transitions, 995 flow [2024-06-14 12:38:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:38:50,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-14 12:38:50,570 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 358 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:38:50,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 122 transitions, 995 flow [2024-06-14 12:38:50,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 869 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:50,579 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 579 flow [2024-06-14 12:38:50,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2024-06-14 12:38:50,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-14 12:38:50,579 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 579 flow [2024-06-14 12:38:50,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:50,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:50,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:50,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:38:50,580 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:50,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1868042332, now seen corresponding path program 2 times [2024-06-14 12:38:50,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:50,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289542383] [2024-06-14 12:38:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:50,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:51,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289542383] [2024-06-14 12:38:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289542383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:51,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:51,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:51,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713705289] [2024-06-14 12:38:51,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:51,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:51,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:51,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:51,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:51,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:51,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:51,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:51,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:51,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:51,906 INFO L124 PetriNetUnfolderBase]: 1598/2417 cut-off events. [2024-06-14 12:38:51,906 INFO L125 PetriNetUnfolderBase]: For 13163/13165 co-relation queries the response was YES. [2024-06-14 12:38:51,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10203 conditions, 2417 events. 1598/2417 cut-off events. For 13163/13165 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11424 event pairs, 478 based on Foata normal form. 12/2425 useless extension candidates. Maximal degree in co-relation 10172. Up to 1988 conditions per place. [2024-06-14 12:38:51,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 48 changer transitions 0/117 dead transitions. [2024-06-14 12:38:51,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1001 flow [2024-06-14 12:38:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:38:51,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-14 12:38:51,921 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 579 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:38:51,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1001 flow [2024-06-14 12:38:51,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 973 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:38:51,933 INFO L231 Difference]: Finished difference. Result has 73 places, 88 transitions, 732 flow [2024-06-14 12:38:51,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=732, PETRI_PLACES=73, PETRI_TRANSITIONS=88} [2024-06-14 12:38:51,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 12:38:51,936 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 88 transitions, 732 flow [2024-06-14 12:38:51,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:51,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:51,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:51,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:38:51,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:51,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash -808562152, now seen corresponding path program 3 times [2024-06-14 12:38:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580395853] [2024-06-14 12:38:51,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:51,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:52,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:52,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580395853] [2024-06-14 12:38:52,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580395853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:52,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:52,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:52,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308926512] [2024-06-14 12:38:52,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:52,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:52,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:52,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 732 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:52,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:52,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:52,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:53,267 INFO L124 PetriNetUnfolderBase]: 1634/2468 cut-off events. [2024-06-14 12:38:53,267 INFO L125 PetriNetUnfolderBase]: For 16011/16013 co-relation queries the response was YES. [2024-06-14 12:38:53,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11163 conditions, 2468 events. 1634/2468 cut-off events. For 16011/16013 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11689 event pairs, 482 based on Foata normal form. 6/2466 useless extension candidates. Maximal degree in co-relation 11130. Up to 2004 conditions per place. [2024-06-14 12:38:53,280 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 60 changer transitions 0/126 dead transitions. [2024-06-14 12:38:53,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 1266 flow [2024-06-14 12:38:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:38:53,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-14 12:38:53,282 INFO L175 Difference]: Start difference. First operand has 73 places, 88 transitions, 732 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:38:53,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 1266 flow [2024-06-14 12:38:53,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 126 transitions, 1150 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:53,296 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 880 flow [2024-06-14 12:38:53,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2024-06-14 12:38:53,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-14 12:38:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 880 flow [2024-06-14 12:38:53,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:53,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:53,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:38:53,297 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:53,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1861613242, now seen corresponding path program 4 times [2024-06-14 12:38:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:53,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522721208] [2024-06-14 12:38:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:53,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:53,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:53,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522721208] [2024-06-14 12:38:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522721208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:53,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491563494] [2024-06-14 12:38:53,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:53,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:54,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:54,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:54,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:54,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:54,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:54,617 INFO L124 PetriNetUnfolderBase]: 1618/2450 cut-off events. [2024-06-14 12:38:54,618 INFO L125 PetriNetUnfolderBase]: For 16215/16217 co-relation queries the response was YES. [2024-06-14 12:38:54,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10985 conditions, 2450 events. 1618/2450 cut-off events. For 16215/16217 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11613 event pairs, 491 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 10951. Up to 1997 conditions per place. [2024-06-14 12:38:54,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 58 changer transitions 0/124 dead transitions. [2024-06-14 12:38:54,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 1240 flow [2024-06-14 12:38:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:38:54,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-14 12:38:54,638 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 880 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:38:54,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 1240 flow [2024-06-14 12:38:54,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1144 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:54,660 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 910 flow [2024-06-14 12:38:54,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-06-14 12:38:54,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 12:38:54,661 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 910 flow [2024-06-14 12:38:54,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:54,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:54,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:54,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:38:54,662 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:54,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1861367164, now seen corresponding path program 1 times [2024-06-14 12:38:54,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:54,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497420249] [2024-06-14 12:38:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:55,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497420249] [2024-06-14 12:38:55,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497420249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:55,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:55,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:38:55,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143161823] [2024-06-14 12:38:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:55,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:38:55,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:55,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:38:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:38:55,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:55,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:55,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:55,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:55,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:56,339 INFO L124 PetriNetUnfolderBase]: 1403/2213 cut-off events. [2024-06-14 12:38:56,340 INFO L125 PetriNetUnfolderBase]: For 15668/15670 co-relation queries the response was YES. [2024-06-14 12:38:56,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9977 conditions, 2213 events. 1403/2213 cut-off events. For 15668/15670 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10796 event pairs, 433 based on Foata normal form. 4/2216 useless extension candidates. Maximal degree in co-relation 9941. Up to 2052 conditions per place. [2024-06-14 12:38:56,352 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-06-14 12:38:56,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1226 flow [2024-06-14 12:38:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:38:56,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:38:56,354 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 910 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:38:56,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1226 flow [2024-06-14 12:38:56,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 1083 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:56,370 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 826 flow [2024-06-14 12:38:56,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=826, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-14 12:38:56,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 12:38:56,371 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 826 flow [2024-06-14 12:38:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:56,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:56,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:56,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:38:56,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:56,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:56,372 INFO L85 PathProgramCache]: Analyzing trace with hash 101912899, now seen corresponding path program 1 times [2024-06-14 12:38:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:56,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374532881] [2024-06-14 12:38:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:56,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:57,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:57,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374532881] [2024-06-14 12:38:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374532881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:57,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:57,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:38:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257047782] [2024-06-14 12:38:57,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:57,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:38:57,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:57,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:38:57,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:38:57,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:38:57,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 826 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:57,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:57,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:38:57,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:57,335 INFO L124 PetriNetUnfolderBase]: 1400/2211 cut-off events. [2024-06-14 12:38:57,335 INFO L125 PetriNetUnfolderBase]: For 15851/15853 co-relation queries the response was YES. [2024-06-14 12:38:57,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 2211 events. 1400/2211 cut-off events. For 15851/15853 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10820 event pairs, 464 based on Foata normal form. 1/2211 useless extension candidates. Maximal degree in co-relation 9829. Up to 2090 conditions per place. [2024-06-14 12:38:57,347 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-14 12:38:57,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 1084 flow [2024-06-14 12:38:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:38:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:38:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 12:38:57,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-14 12:38:57,349 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 826 flow. Second operand 5 states and 86 transitions. [2024-06-14 12:38:57,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 1084 flow [2024-06-14 12:38:57,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 1043 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:57,361 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 835 flow [2024-06-14 12:38:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=835, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-14 12:38:57,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 12:38:57,361 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 835 flow [2024-06-14 12:38:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:57,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:57,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:38:57,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:57,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -358157964, now seen corresponding path program 1 times [2024-06-14 12:38:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:57,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695867359] [2024-06-14 12:38:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:58,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:58,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695867359] [2024-06-14 12:38:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695867359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:58,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:58,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:58,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494414058] [2024-06-14 12:38:58,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:58,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:58,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:58,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:58,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:58,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:58,637 INFO L124 PetriNetUnfolderBase]: 1648/2520 cut-off events. [2024-06-14 12:38:58,637 INFO L125 PetriNetUnfolderBase]: For 21821/21827 co-relation queries the response was YES. [2024-06-14 12:38:58,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11685 conditions, 2520 events. 1648/2520 cut-off events. For 21821/21827 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12167 event pairs, 490 based on Foata normal form. 14/2530 useless extension candidates. Maximal degree in co-relation 11647. Up to 2015 conditions per place. [2024-06-14 12:38:58,654 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 63 changer transitions 0/141 dead transitions. [2024-06-14 12:38:58,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 141 transitions, 1335 flow [2024-06-14 12:38:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:38:58,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-14 12:38:58,655 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 835 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:38:58,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 141 transitions, 1335 flow [2024-06-14 12:38:58,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 1307 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:38:58,676 INFO L231 Difference]: Finished difference. Result has 85 places, 109 transitions, 1020 flow [2024-06-14 12:38:58,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1020, PETRI_PLACES=85, PETRI_TRANSITIONS=109} [2024-06-14 12:38:58,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 12:38:58,677 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 109 transitions, 1020 flow [2024-06-14 12:38:58,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:58,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:58,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:58,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:38:58,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:58,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:58,678 INFO L85 PathProgramCache]: Analyzing trace with hash -358152384, now seen corresponding path program 2 times [2024-06-14 12:38:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246481236] [2024-06-14 12:38:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:59,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:59,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246481236] [2024-06-14 12:38:59,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246481236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:59,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:59,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:38:59,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843114894] [2024-06-14 12:38:59,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:59,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:38:59,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:38:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:38:59,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:38:59,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 109 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:59,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:59,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:38:59,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:59,910 INFO L124 PetriNetUnfolderBase]: 1680/2574 cut-off events. [2024-06-14 12:38:59,910 INFO L125 PetriNetUnfolderBase]: For 25576/25578 co-relation queries the response was YES. [2024-06-14 12:38:59,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12530 conditions, 2574 events. 1680/2574 cut-off events. For 25576/25578 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12505 event pairs, 476 based on Foata normal form. 8/2578 useless extension candidates. Maximal degree in co-relation 12491. Up to 2044 conditions per place. [2024-06-14 12:38:59,922 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 75 selfloop transitions, 65 changer transitions 0/144 dead transitions. [2024-06-14 12:38:59,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 144 transitions, 1530 flow [2024-06-14 12:38:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:38:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:38:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:38:59,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-14 12:38:59,924 INFO L175 Difference]: Start difference. First operand has 85 places, 109 transitions, 1020 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:38:59,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 144 transitions, 1530 flow [2024-06-14 12:38:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1315 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:59,943 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 1036 flow [2024-06-14 12:38:59,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1036, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2024-06-14 12:38:59,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-14 12:38:59,944 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 1036 flow [2024-06-14 12:38:59,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:59,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:59,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:59,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:38:59,945 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:59,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash 704377988, now seen corresponding path program 3 times [2024-06-14 12:38:59,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:59,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089004240] [2024-06-14 12:38:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089004240] [2024-06-14 12:39:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089004240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:00,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:00,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:00,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328396352] [2024-06-14 12:39:00,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:00,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:00,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:00,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:00,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 1036 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:00,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:00,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:00,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:01,133 INFO L124 PetriNetUnfolderBase]: 1664/2552 cut-off events. [2024-06-14 12:39:01,134 INFO L125 PetriNetUnfolderBase]: For 26303/26308 co-relation queries the response was YES. [2024-06-14 12:39:01,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 2552 events. 1664/2552 cut-off events. For 26303/26308 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12351 event pairs, 494 based on Foata normal form. 8/2549 useless extension candidates. Maximal degree in co-relation 12363. Up to 2031 conditions per place. [2024-06-14 12:39:01,146 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 62 changer transitions 0/138 dead transitions. [2024-06-14 12:39:01,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 138 transitions, 1378 flow [2024-06-14 12:39:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:39:01,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 12:39:01,148 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 1036 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:39:01,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 138 transitions, 1378 flow [2024-06-14 12:39:01,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1240 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:01,168 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1033 flow [2024-06-14 12:39:01,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1033, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-14 12:39:01,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 12:39:01,169 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1033 flow [2024-06-14 12:39:01,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:01,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:01,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:01,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:39:01,170 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:01,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:01,170 INFO L85 PathProgramCache]: Analyzing trace with hash 475831595, now seen corresponding path program 1 times [2024-06-14 12:39:01,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:01,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398835381] [2024-06-14 12:39:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:01,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:01,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:01,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398835381] [2024-06-14 12:39:01,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398835381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:01,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:01,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:01,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6224882] [2024-06-14 12:39:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:01,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:01,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:01,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:01,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1033 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:01,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:01,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:01,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:02,319 INFO L124 PetriNetUnfolderBase]: 1681/2574 cut-off events. [2024-06-14 12:39:02,319 INFO L125 PetriNetUnfolderBase]: For 29120/29125 co-relation queries the response was YES. [2024-06-14 12:39:02,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12635 conditions, 2574 events. 1681/2574 cut-off events. For 29120/29125 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12525 event pairs, 380 based on Foata normal form. 6/2578 useless extension candidates. Maximal degree in co-relation 12595. Up to 2252 conditions per place. [2024-06-14 12:39:02,334 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 109 selfloop transitions, 32 changer transitions 0/145 dead transitions. [2024-06-14 12:39:02,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 145 transitions, 1499 flow [2024-06-14 12:39:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:39:02,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 12:39:02,337 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1033 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:39:02,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 145 transitions, 1499 flow [2024-06-14 12:39:02,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 145 transitions, 1316 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:02,360 INFO L231 Difference]: Finished difference. Result has 89 places, 119 transitions, 969 flow [2024-06-14 12:39:02,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=969, PETRI_PLACES=89, PETRI_TRANSITIONS=119} [2024-06-14 12:39:02,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 12:39:02,361 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 119 transitions, 969 flow [2024-06-14 12:39:02,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:02,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:02,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:02,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:39:02,361 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:02,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:02,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1663913505, now seen corresponding path program 2 times [2024-06-14 12:39:02,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:02,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897262630] [2024-06-14 12:39:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:02,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:02,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897262630] [2024-06-14 12:39:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897262630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:02,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:02,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:02,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138695545] [2024-06-14 12:39:02,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:02,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:03,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:03,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 119 transitions, 969 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:03,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:03,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:03,540 INFO L124 PetriNetUnfolderBase]: 1673/2561 cut-off events. [2024-06-14 12:39:03,541 INFO L125 PetriNetUnfolderBase]: For 30398/30403 co-relation queries the response was YES. [2024-06-14 12:39:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12518 conditions, 2561 events. 1673/2561 cut-off events. For 30398/30403 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12432 event pairs, 500 based on Foata normal form. 6/2565 useless extension candidates. Maximal degree in co-relation 12477. Up to 2328 conditions per place. [2024-06-14 12:39:03,554 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 106 selfloop transitions, 33 changer transitions 0/143 dead transitions. [2024-06-14 12:39:03,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 143 transitions, 1325 flow [2024-06-14 12:39:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:39:03,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:39:03,556 INFO L175 Difference]: Start difference. First operand has 89 places, 119 transitions, 969 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:39:03,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 143 transitions, 1325 flow [2024-06-14 12:39:03,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 143 transitions, 1265 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:03,580 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 984 flow [2024-06-14 12:39:03,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=984, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-14 12:39:03,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-14 12:39:03,580 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 984 flow [2024-06-14 12:39:03,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:03,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:03,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:03,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:39:03,581 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:03,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1782185883, now seen corresponding path program 1 times [2024-06-14 12:39:03,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:03,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695949327] [2024-06-14 12:39:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:03,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:04,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:04,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695949327] [2024-06-14 12:39:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695949327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:04,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:04,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:04,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004115430] [2024-06-14 12:39:04,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:04,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:04,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:04,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 984 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:04,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:04,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:04,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:05,453 INFO L124 PetriNetUnfolderBase]: 1765/2710 cut-off events. [2024-06-14 12:39:05,453 INFO L125 PetriNetUnfolderBase]: For 37585/37587 co-relation queries the response was YES. [2024-06-14 12:39:05,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13388 conditions, 2710 events. 1765/2710 cut-off events. For 37585/37587 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13391 event pairs, 447 based on Foata normal form. 24/2730 useless extension candidates. Maximal degree in co-relation 13345. Up to 2028 conditions per place. [2024-06-14 12:39:05,468 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 82 selfloop transitions, 70 changer transitions 0/156 dead transitions. [2024-06-14 12:39:05,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1426 flow [2024-06-14 12:39:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:39:05,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:39:05,471 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 984 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:39:05,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1426 flow [2024-06-14 12:39:05,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 156 transitions, 1351 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:05,501 INFO L231 Difference]: Finished difference. Result has 95 places, 121 transitions, 1091 flow [2024-06-14 12:39:05,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1091, PETRI_PLACES=95, PETRI_TRANSITIONS=121} [2024-06-14 12:39:05,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:39:05,502 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 121 transitions, 1091 flow [2024-06-14 12:39:05,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:05,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:05,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:39:05,503 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash -857349214, now seen corresponding path program 1 times [2024-06-14 12:39:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224306201] [2024-06-14 12:39:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:05,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224306201] [2024-06-14 12:39:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224306201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:06,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:06,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275268998] [2024-06-14 12:39:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:06,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:06,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:06,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:06,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:06,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 121 transitions, 1091 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:06,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:06,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:06,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:06,546 INFO L124 PetriNetUnfolderBase]: 1770/2729 cut-off events. [2024-06-14 12:39:06,547 INFO L125 PetriNetUnfolderBase]: For 37854/37860 co-relation queries the response was YES. [2024-06-14 12:39:06,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13999 conditions, 2729 events. 1770/2729 cut-off events. For 37854/37860 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13501 event pairs, 529 based on Foata normal form. 7/2735 useless extension candidates. Maximal degree in co-relation 13955. Up to 2623 conditions per place. [2024-06-14 12:39:06,561 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 123 selfloop transitions, 13 changer transitions 0/140 dead transitions. [2024-06-14 12:39:06,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 1441 flow [2024-06-14 12:39:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 12:39:06,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:39:06,562 INFO L175 Difference]: Start difference. First operand has 95 places, 121 transitions, 1091 flow. Second operand 6 states and 100 transitions. [2024-06-14 12:39:06,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 1441 flow [2024-06-14 12:39:06,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1293 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:06,593 INFO L231 Difference]: Finished difference. Result has 95 places, 124 transitions, 1006 flow [2024-06-14 12:39:06,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1006, PETRI_PLACES=95, PETRI_TRANSITIONS=124} [2024-06-14 12:39:06,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:39:06,593 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 124 transitions, 1006 flow [2024-06-14 12:39:06,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:06,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:06,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:06,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:39:06,594 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:06,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:06,594 INFO L85 PathProgramCache]: Analyzing trace with hash 443060123, now seen corresponding path program 2 times [2024-06-14 12:39:06,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:06,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948274224] [2024-06-14 12:39:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:06,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:07,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:07,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948274224] [2024-06-14 12:39:07,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948274224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:07,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:07,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692111048] [2024-06-14 12:39:07,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:07,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:07,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:07,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 124 transitions, 1006 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:07,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:07,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:08,274 INFO L124 PetriNetUnfolderBase]: 1787/2728 cut-off events. [2024-06-14 12:39:08,274 INFO L125 PetriNetUnfolderBase]: For 40516/40518 co-relation queries the response was YES. [2024-06-14 12:39:08,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14061 conditions, 2728 events. 1787/2728 cut-off events. For 40516/40518 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13316 event pairs, 462 based on Foata normal form. 4/2719 useless extension candidates. Maximal degree in co-relation 14016. Up to 2211 conditions per place. [2024-06-14 12:39:08,291 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 77 selfloop transitions, 74 changer transitions 0/155 dead transitions. [2024-06-14 12:39:08,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1432 flow [2024-06-14 12:39:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:39:08,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:39:08,301 INFO L175 Difference]: Start difference. First operand has 95 places, 124 transitions, 1006 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:39:08,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1432 flow [2024-06-14 12:39:08,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 1393 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:08,337 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1159 flow [2024-06-14 12:39:08,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-14 12:39:08,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-14 12:39:08,337 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1159 flow [2024-06-14 12:39:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:08,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:08,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:08,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:39:08,338 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:08,339 INFO L85 PathProgramCache]: Analyzing trace with hash 443356793, now seen corresponding path program 3 times [2024-06-14 12:39:08,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:08,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334310245] [2024-06-14 12:39:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:08,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:09,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:09,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334310245] [2024-06-14 12:39:09,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334310245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:09,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:09,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:09,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174184425] [2024-06-14 12:39:09,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:09,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:09,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 1159 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:09,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:09,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:09,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:10,111 INFO L124 PetriNetUnfolderBase]: 1804/2755 cut-off events. [2024-06-14 12:39:10,111 INFO L125 PetriNetUnfolderBase]: For 45816/45818 co-relation queries the response was YES. [2024-06-14 12:39:10,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14946 conditions, 2755 events. 1804/2755 cut-off events. For 45816/45818 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13539 event pairs, 420 based on Foata normal form. 4/2746 useless extension candidates. Maximal degree in co-relation 14900. Up to 2000 conditions per place. [2024-06-14 12:39:10,130 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 81 changer transitions 0/165 dead transitions. [2024-06-14 12:39:10,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1743 flow [2024-06-14 12:39:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:39:10,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:39:10,132 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1159 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:39:10,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1743 flow [2024-06-14 12:39:10,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 165 transitions, 1571 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:10,174 INFO L231 Difference]: Finished difference. Result has 101 places, 130 transitions, 1232 flow [2024-06-14 12:39:10,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1232, PETRI_PLACES=101, PETRI_TRANSITIONS=130} [2024-06-14 12:39:10,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 12:39:10,175 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 130 transitions, 1232 flow [2024-06-14 12:39:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:10,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:10,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:10,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:39:10,176 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:10,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:10,176 INFO L85 PathProgramCache]: Analyzing trace with hash 206884763, now seen corresponding path program 4 times [2024-06-14 12:39:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:10,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914211835] [2024-06-14 12:39:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:10,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:11,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914211835] [2024-06-14 12:39:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914211835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:11,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:11,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:11,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799000346] [2024-06-14 12:39:11,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:11,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:11,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:11,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 130 transitions, 1232 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:11,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:11,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:11,924 INFO L124 PetriNetUnfolderBase]: 1796/2747 cut-off events. [2024-06-14 12:39:11,924 INFO L125 PetriNetUnfolderBase]: For 49287/49289 co-relation queries the response was YES. [2024-06-14 12:39:11,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15093 conditions, 2747 events. 1796/2747 cut-off events. For 49287/49289 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13460 event pairs, 472 based on Foata normal form. 4/2738 useless extension candidates. Maximal degree in co-relation 15046. Up to 2226 conditions per place. [2024-06-14 12:39:11,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 83 selfloop transitions, 72 changer transitions 0/159 dead transitions. [2024-06-14 12:39:11,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 159 transitions, 1632 flow [2024-06-14 12:39:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:39:11,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:39:11,944 INFO L175 Difference]: Start difference. First operand has 101 places, 130 transitions, 1232 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:39:11,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 159 transitions, 1632 flow [2024-06-14 12:39:11,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1440 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:11,997 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 1192 flow [2024-06-14 12:39:11,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1192, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2024-06-14 12:39:11,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 12:39:11,998 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 1192 flow [2024-06-14 12:39:11,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:11,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:11,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:11,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:39:11,999 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:11,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash -845921374, now seen corresponding path program 2 times [2024-06-14 12:39:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366741035] [2024-06-14 12:39:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366741035] [2024-06-14 12:39:12,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366741035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:12,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:12,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:12,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706406351] [2024-06-14 12:39:12,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:12,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:12,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 1192 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:12,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:12,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:12,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:12,986 INFO L124 PetriNetUnfolderBase]: 1793/2772 cut-off events. [2024-06-14 12:39:12,986 INFO L125 PetriNetUnfolderBase]: For 50990/51004 co-relation queries the response was YES. [2024-06-14 12:39:12,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15013 conditions, 2772 events. 1793/2772 cut-off events. For 50990/51004 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13803 event pairs, 527 based on Foata normal form. 13/2782 useless extension candidates. Maximal degree in co-relation 14965. Up to 2655 conditions per place. [2024-06-14 12:39:13,004 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 18 changer transitions 0/147 dead transitions. [2024-06-14 12:39:13,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 147 transitions, 1560 flow [2024-06-14 12:39:13,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:39:13,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:39:13,006 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 1192 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:39:13,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 147 transitions, 1560 flow [2024-06-14 12:39:13,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 147 transitions, 1385 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:13,050 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1122 flow [2024-06-14 12:39:13,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1122, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-14 12:39:13,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 12:39:13,051 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1122 flow [2024-06-14 12:39:13,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:13,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:13,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:13,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:39:13,052 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:13,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash -851629342, now seen corresponding path program 1 times [2024-06-14 12:39:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:13,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877019610] [2024-06-14 12:39:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:13,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:13,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877019610] [2024-06-14 12:39:13,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877019610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:13,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:13,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176735879] [2024-06-14 12:39:13,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:13,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:39:13,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1122 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:13,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:13,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:39:13,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:14,116 INFO L124 PetriNetUnfolderBase]: 1689/2664 cut-off events. [2024-06-14 12:39:14,116 INFO L125 PetriNetUnfolderBase]: For 55282/55284 co-relation queries the response was YES. [2024-06-14 12:39:14,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14550 conditions, 2664 events. 1689/2664 cut-off events. For 55282/55284 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13547 event pairs, 513 based on Foata normal form. 2/2665 useless extension candidates. Maximal degree in co-relation 14500. Up to 2482 conditions per place. [2024-06-14 12:39:14,136 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 132 selfloop transitions, 11 changer transitions 0/151 dead transitions. [2024-06-14 12:39:14,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 1468 flow [2024-06-14 12:39:14,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:39:14,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:39:14,152 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1122 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:39:14,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 1468 flow [2024-06-14 12:39:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 1432 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:14,215 INFO L231 Difference]: Finished difference. Result has 108 places, 139 transitions, 1144 flow [2024-06-14 12:39:14,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1144, PETRI_PLACES=108, PETRI_TRANSITIONS=139} [2024-06-14 12:39:14,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-14 12:39:14,216 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 139 transitions, 1144 flow [2024-06-14 12:39:14,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:14,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:14,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:14,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:39:14,217 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:14,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash -845915422, now seen corresponding path program 2 times [2024-06-14 12:39:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792936371] [2024-06-14 12:39:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792936371] [2024-06-14 12:39:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792936371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:14,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:14,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:39:14,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180772312] [2024-06-14 12:39:14,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:14,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:39:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:39:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:39:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:39:15,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 139 transitions, 1144 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:15,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:15,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:39:15,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:15,382 INFO L124 PetriNetUnfolderBase]: 1683/2657 cut-off events. [2024-06-14 12:39:15,382 INFO L125 PetriNetUnfolderBase]: For 58273/58278 co-relation queries the response was YES. [2024-06-14 12:39:15,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14864 conditions, 2657 events. 1683/2657 cut-off events. For 58273/58278 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13532 event pairs, 517 based on Foata normal form. 4/2659 useless extension candidates. Maximal degree in co-relation 14812. Up to 2466 conditions per place. [2024-06-14 12:39:15,400 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 18 changer transitions 0/151 dead transitions. [2024-06-14 12:39:15,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1486 flow [2024-06-14 12:39:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:39:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:39:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:39:15,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-14 12:39:15,401 INFO L175 Difference]: Start difference. First operand has 108 places, 139 transitions, 1144 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:39:15,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1486 flow [2024-06-14 12:39:15,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1450 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:15,450 INFO L231 Difference]: Finished difference. Result has 110 places, 142 transitions, 1187 flow [2024-06-14 12:39:15,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1187, PETRI_PLACES=110, PETRI_TRANSITIONS=142} [2024-06-14 12:39:15,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 12:39:15,451 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 142 transitions, 1187 flow [2024-06-14 12:39:15,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:15,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:15,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:15,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:39:15,452 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:15,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -845907486, now seen corresponding path program 1 times [2024-06-14 12:39:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:15,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917500673] [2024-06-14 12:39:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:16,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:16,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917500673] [2024-06-14 12:39:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917500673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:16,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673031716] [2024-06-14 12:39:16,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:16,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:16,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 142 transitions, 1187 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:16,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:16,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:16,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:16,697 INFO L124 PetriNetUnfolderBase]: 1794/2766 cut-off events. [2024-06-14 12:39:16,697 INFO L125 PetriNetUnfolderBase]: For 61144/61146 co-relation queries the response was YES. [2024-06-14 12:39:16,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15666 conditions, 2766 events. 1794/2766 cut-off events. For 61144/61146 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13730 event pairs, 558 based on Foata normal form. 1/2766 useless extension candidates. Maximal degree in co-relation 15613. Up to 2679 conditions per place. [2024-06-14 12:39:16,715 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 137 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2024-06-14 12:39:16,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 155 transitions, 1551 flow [2024-06-14 12:39:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:39:16,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693379790940767 [2024-06-14 12:39:16,718 INFO L175 Difference]: Start difference. First operand has 110 places, 142 transitions, 1187 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:39:16,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 155 transitions, 1551 flow [2024-06-14 12:39:16,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 155 transitions, 1496 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:16,772 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1206 flow [2024-06-14 12:39:16,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1206, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2024-06-14 12:39:16,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 12:39:16,773 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1206 flow [2024-06-14 12:39:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:16,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:16,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:16,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:39:16,774 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:16,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash 39838263, now seen corresponding path program 1 times [2024-06-14 12:39:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:16,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284347794] [2024-06-14 12:39:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:16,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:17,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:17,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284347794] [2024-06-14 12:39:17,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284347794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:17,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:17,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:17,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516340787] [2024-06-14 12:39:17,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:17,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:17,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:17,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1206 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:17,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:17,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:17,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:17,927 INFO L124 PetriNetUnfolderBase]: 1913/2977 cut-off events. [2024-06-14 12:39:17,927 INFO L125 PetriNetUnfolderBase]: For 74939/74941 co-relation queries the response was YES. [2024-06-14 12:39:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 2977 events. 1913/2977 cut-off events. For 74939/74941 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15143 event pairs, 357 based on Foata normal form. 16/2989 useless extension candidates. Maximal degree in co-relation 17103. Up to 1749 conditions per place. [2024-06-14 12:39:17,950 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 68 changer transitions 0/186 dead transitions. [2024-06-14 12:39:17,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 186 transitions, 1830 flow [2024-06-14 12:39:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:39:17,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:39:17,952 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1206 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:39:17,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 186 transitions, 1830 flow [2024-06-14 12:39:18,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 186 transitions, 1756 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:18,096 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1324 flow [2024-06-14 12:39:18,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-14 12:39:18,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-14 12:39:18,097 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1324 flow [2024-06-14 12:39:18,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:18,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:18,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:18,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:39:18,097 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:18,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:18,098 INFO L85 PathProgramCache]: Analyzing trace with hash -731065153, now seen corresponding path program 2 times [2024-06-14 12:39:18,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:18,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444607038] [2024-06-14 12:39:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:18,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:18,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444607038] [2024-06-14 12:39:18,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444607038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:18,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:18,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:18,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384774736] [2024-06-14 12:39:18,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:18,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:18,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:18,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:18,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:18,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:18,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:18,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:18,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:19,360 INFO L124 PetriNetUnfolderBase]: 1971/3070 cut-off events. [2024-06-14 12:39:19,360 INFO L125 PetriNetUnfolderBase]: For 81662/81664 co-relation queries the response was YES. [2024-06-14 12:39:19,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 3070 events. 1971/3070 cut-off events. For 81662/81664 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15742 event pairs, 499 based on Foata normal form. 16/3082 useless extension candidates. Maximal degree in co-relation 18090. Up to 2256 conditions per place. [2024-06-14 12:39:19,379 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 111 selfloop transitions, 71 changer transitions 0/186 dead transitions. [2024-06-14 12:39:19,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 186 transitions, 1832 flow [2024-06-14 12:39:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:39:19,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:39:19,391 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1324 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:39:19,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 186 transitions, 1832 flow [2024-06-14 12:39:19,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1749 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:19,453 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1417 flow [2024-06-14 12:39:19,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1417, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-06-14 12:39:19,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-14 12:39:19,454 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1417 flow [2024-06-14 12:39:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:19,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:19,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:39:19,455 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)] === [2024-06-14 12:39:19,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -443378668, now seen corresponding path program 1 times [2024-06-14 12:39:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:19,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249674738] [2024-06-14 12:39:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:20,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249674738] [2024-06-14 12:39:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249674738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:20,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:20,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428699355] [2024-06-14 12:39:20,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:20,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:20,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1417 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:20,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:20,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:20,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:20,593 INFO L124 PetriNetUnfolderBase]: 1981/3092 cut-off events. [2024-06-14 12:39:20,594 INFO L125 PetriNetUnfolderBase]: For 82934/82943 co-relation queries the response was YES. [2024-06-14 12:39:20,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18709 conditions, 3092 events. 1981/3092 cut-off events. For 82934/82943 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16024 event pairs, 566 based on Foata normal form. 10/3100 useless extension candidates. Maximal degree in co-relation 18653. Up to 2856 conditions per place. [2024-06-14 12:39:20,613 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 136 selfloop transitions, 35 changer transitions 0/175 dead transitions. [2024-06-14 12:39:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 175 transitions, 1879 flow [2024-06-14 12:39:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:39:20,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:39:20,614 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1417 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:39:20,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 175 transitions, 1879 flow [2024-06-14 12:39:20,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 175 transitions, 1721 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:20,692 INFO L231 Difference]: Finished difference. Result has 120 places, 152 transitions, 1387 flow [2024-06-14 12:39:20,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1387, PETRI_PLACES=120, PETRI_TRANSITIONS=152} [2024-06-14 12:39:20,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-14 12:39:20,692 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 152 transitions, 1387 flow [2024-06-14 12:39:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:20,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:39:20,693 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:20,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -592537003, now seen corresponding path program 3 times [2024-06-14 12:39:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630782004] [2024-06-14 12:39:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630782004] [2024-06-14 12:39:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630782004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:21,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:21,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079494880] [2024-06-14 12:39:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:21,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:21,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:21,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 152 transitions, 1387 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:21,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:21,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:22,228 INFO L124 PetriNetUnfolderBase]: 2100/3310 cut-off events. [2024-06-14 12:39:22,229 INFO L125 PetriNetUnfolderBase]: For 97419/97425 co-relation queries the response was YES. [2024-06-14 12:39:22,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20124 conditions, 3310 events. 2100/3310 cut-off events. For 97419/97425 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17622 event pairs, 417 based on Foata normal form. 22/3328 useless extension candidates. Maximal degree in co-relation 20067. Up to 2373 conditions per place. [2024-06-14 12:39:22,253 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 73 changer transitions 0/197 dead transitions. [2024-06-14 12:39:22,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 197 transitions, 2071 flow [2024-06-14 12:39:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:39:22,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 12:39:22,255 INFO L175 Difference]: Start difference. First operand has 120 places, 152 transitions, 1387 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:39:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 197 transitions, 2071 flow [2024-06-14 12:39:22,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 197 transitions, 1973 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:22,343 INFO L231 Difference]: Finished difference. Result has 123 places, 154 transitions, 1499 flow [2024-06-14 12:39:22,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1499, PETRI_PLACES=123, PETRI_TRANSITIONS=154} [2024-06-14 12:39:22,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 12:39:22,343 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 154 transitions, 1499 flow [2024-06-14 12:39:22,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:22,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:22,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:22,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:39:22,344 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:22,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash -587026753, now seen corresponding path program 4 times [2024-06-14 12:39:22,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:22,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202227308] [2024-06-14 12:39:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:22,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:23,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202227308] [2024-06-14 12:39:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202227308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:23,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:23,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946451324] [2024-06-14 12:39:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:23,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:23,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 154 transitions, 1499 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:23,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:23,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:23,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:23,920 INFO L124 PetriNetUnfolderBase]: 2175/3427 cut-off events. [2024-06-14 12:39:23,921 INFO L125 PetriNetUnfolderBase]: For 107786/107788 co-relation queries the response was YES. [2024-06-14 12:39:23,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21221 conditions, 3427 events. 2175/3427 cut-off events. For 107786/107788 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18434 event pairs, 548 based on Foata normal form. 20/3443 useless extension candidates. Maximal degree in co-relation 21163. Up to 2749 conditions per place. [2024-06-14 12:39:23,950 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 66 changer transitions 0/191 dead transitions. [2024-06-14 12:39:23,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 191 transitions, 2019 flow [2024-06-14 12:39:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:39:23,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:39:23,951 INFO L175 Difference]: Start difference. First operand has 123 places, 154 transitions, 1499 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:39:23,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 191 transitions, 2019 flow [2024-06-14 12:39:24,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 191 transitions, 1913 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:24,042 INFO L231 Difference]: Finished difference. Result has 127 places, 155 transitions, 1566 flow [2024-06-14 12:39:24,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=127, PETRI_TRANSITIONS=155} [2024-06-14 12:39:24,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 12:39:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 155 transitions, 1566 flow [2024-06-14 12:39:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:24,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:24,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:24,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:39:24,044 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:24,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -592533283, now seen corresponding path program 5 times [2024-06-14 12:39:24,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:24,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254744529] [2024-06-14 12:39:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:24,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:24,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254744529] [2024-06-14 12:39:24,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254744529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:24,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:24,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:24,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371634153] [2024-06-14 12:39:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:24,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:24,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:24,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 155 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:24,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:24,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:24,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:25,678 INFO L124 PetriNetUnfolderBase]: 2250/3560 cut-off events. [2024-06-14 12:39:25,678 INFO L125 PetriNetUnfolderBase]: For 114658/114664 co-relation queries the response was YES. [2024-06-14 12:39:25,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22166 conditions, 3560 events. 2250/3560 cut-off events. For 114658/114664 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19458 event pairs, 572 based on Foata normal form. 26/3582 useless extension candidates. Maximal degree in co-relation 22106. Up to 2874 conditions per place. [2024-06-14 12:39:25,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 70 changer transitions 0/195 dead transitions. [2024-06-14 12:39:25,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 195 transitions, 2106 flow [2024-06-14 12:39:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:39:25,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:39:25,707 INFO L175 Difference]: Start difference. First operand has 127 places, 155 transitions, 1566 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:39:25,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 195 transitions, 2106 flow [2024-06-14 12:39:25,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 195 transitions, 1963 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:25,802 INFO L231 Difference]: Finished difference. Result has 129 places, 156 transitions, 1604 flow [2024-06-14 12:39:25,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1604, PETRI_PLACES=129, PETRI_TRANSITIONS=156} [2024-06-14 12:39:25,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-14 12:39:25,803 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 156 transitions, 1604 flow [2024-06-14 12:39:25,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:25,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:25,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:25,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:39:25,804 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)] === [2024-06-14 12:39:25,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:25,804 INFO L85 PathProgramCache]: Analyzing trace with hash -586811551, now seen corresponding path program 1 times [2024-06-14 12:39:25,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:25,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615364389] [2024-06-14 12:39:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:25,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:26,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615364389] [2024-06-14 12:39:26,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615364389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:26,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:26,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:26,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831535295] [2024-06-14 12:39:26,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:26,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:26,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:26,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:26,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:26,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:26,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 156 transitions, 1604 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 12:39:26,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:26,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:26,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:27,588 INFO L124 PetriNetUnfolderBase]: 2291/3633 cut-off events. [2024-06-14 12:39:27,588 INFO L125 PetriNetUnfolderBase]: For 117886/117888 co-relation queries the response was YES. [2024-06-14 12:39:27,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22662 conditions, 3633 events. 2291/3633 cut-off events. For 117886/117888 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20073 event pairs, 564 based on Foata normal form. 12/3641 useless extension candidates. Maximal degree in co-relation 22601. Up to 2540 conditions per place. [2024-06-14 12:39:27,615 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 69 changer transitions 0/194 dead transitions. [2024-06-14 12:39:27,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 194 transitions, 2134 flow [2024-06-14 12:39:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:39:27,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:39:27,617 INFO L175 Difference]: Start difference. First operand has 129 places, 156 transitions, 1604 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:39:27,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 194 transitions, 2134 flow [2024-06-14 12:39:27,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 194 transitions, 1981 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:27,721 INFO L231 Difference]: Finished difference. Result has 131 places, 157 transitions, 1628 flow [2024-06-14 12:39:27,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1628, PETRI_PLACES=131, PETRI_TRANSITIONS=157} [2024-06-14 12:39:27,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 12:39:27,721 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 157 transitions, 1628 flow [2024-06-14 12:39:27,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 12:39:27,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:27,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:39:27,722 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:27,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash -808020472, now seen corresponding path program 1 times [2024-06-14 12:39:27,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856903250] [2024-06-14 12:39:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:28,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:28,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856903250] [2024-06-14 12:39:28,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856903250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:28,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:28,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204176838] [2024-06-14 12:39:28,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:28,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:28,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:28,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:28,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 157 transitions, 1628 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:28,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:28,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:28,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:28,995 INFO L124 PetriNetUnfolderBase]: 2296/3643 cut-off events. [2024-06-14 12:39:28,996 INFO L125 PetriNetUnfolderBase]: For 117943/117949 co-relation queries the response was YES. [2024-06-14 12:39:29,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22797 conditions, 3643 events. 2296/3643 cut-off events. For 117943/117949 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20174 event pairs, 692 based on Foata normal form. 7/3649 useless extension candidates. Maximal degree in co-relation 22735. Up to 3502 conditions per place. [2024-06-14 12:39:29,019 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 157 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2024-06-14 12:39:29,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 177 transitions, 2074 flow [2024-06-14 12:39:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:39:29,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:39:29,021 INFO L175 Difference]: Start difference. First operand has 131 places, 157 transitions, 1628 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:39:29,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 177 transitions, 2074 flow [2024-06-14 12:39:29,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 177 transitions, 1917 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:29,143 INFO L231 Difference]: Finished difference. Result has 132 places, 160 transitions, 1559 flow [2024-06-14 12:39:29,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1559, PETRI_PLACES=132, PETRI_TRANSITIONS=160} [2024-06-14 12:39:29,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-14 12:39:29,144 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 160 transitions, 1559 flow [2024-06-14 12:39:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:29,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:29,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:29,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:39:29,144 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:29,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1329948598, now seen corresponding path program 2 times [2024-06-14 12:39:29,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:29,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78363298] [2024-06-14 12:39:29,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:29,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:29,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78363298] [2024-06-14 12:39:29,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78363298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:29,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:29,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083883014] [2024-06-14 12:39:29,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:29,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:29,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:29,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:29,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 160 transitions, 1559 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:29,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:29,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:29,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:30,359 INFO L124 PetriNetUnfolderBase]: 2324/3681 cut-off events. [2024-06-14 12:39:30,359 INFO L125 PetriNetUnfolderBase]: For 121827/121832 co-relation queries the response was YES. [2024-06-14 12:39:30,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22988 conditions, 3681 events. 2324/3681 cut-off events. For 121827/121832 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20363 event pairs, 678 based on Foata normal form. 4/3683 useless extension candidates. Maximal degree in co-relation 22925. Up to 3386 conditions per place. [2024-06-14 12:39:30,391 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 38 changer transitions 0/185 dead transitions. [2024-06-14 12:39:30,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 185 transitions, 2143 flow [2024-06-14 12:39:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:39:30,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:39:30,393 INFO L175 Difference]: Start difference. First operand has 132 places, 160 transitions, 1559 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:39:30,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 185 transitions, 2143 flow [2024-06-14 12:39:30,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 185 transitions, 2077 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:30,514 INFO L231 Difference]: Finished difference. Result has 135 places, 168 transitions, 1706 flow [2024-06-14 12:39:30,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1706, PETRI_PLACES=135, PETRI_TRANSITIONS=168} [2024-06-14 12:39:30,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-14 12:39:30,515 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 168 transitions, 1706 flow [2024-06-14 12:39:30,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:30,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:30,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:30,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:39:30,516 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:30,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1697555709, now seen corresponding path program 6 times [2024-06-14 12:39:30,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:30,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792186469] [2024-06-14 12:39:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:31,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792186469] [2024-06-14 12:39:31,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792186469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:31,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:31,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286633773] [2024-06-14 12:39:31,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:31,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:31,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:31,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 168 transitions, 1706 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:31,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:31,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:31,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:32,039 INFO L124 PetriNetUnfolderBase]: 2288/3630 cut-off events. [2024-06-14 12:39:32,040 INFO L125 PetriNetUnfolderBase]: For 128986/128991 co-relation queries the response was YES. [2024-06-14 12:39:32,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22857 conditions, 3630 events. 2288/3630 cut-off events. For 128986/128991 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19970 event pairs, 573 based on Foata normal form. 22/3641 useless extension candidates. Maximal degree in co-relation 22792. Up to 2941 conditions per place. [2024-06-14 12:39:32,070 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 63 changer transitions 0/200 dead transitions. [2024-06-14 12:39:32,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 2206 flow [2024-06-14 12:39:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:39:32,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:39:32,072 INFO L175 Difference]: Start difference. First operand has 135 places, 168 transitions, 1706 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:39:32,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 2206 flow [2024-06-14 12:39:32,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 200 transitions, 2112 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:32,189 INFO L231 Difference]: Finished difference. Result has 140 places, 168 transitions, 1747 flow [2024-06-14 12:39:32,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1747, PETRI_PLACES=140, PETRI_TRANSITIONS=168} [2024-06-14 12:39:32,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 12:39:32,189 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 168 transitions, 1747 flow [2024-06-14 12:39:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:32,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:32,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:39:32,190 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:32,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1747692385, now seen corresponding path program 2 times [2024-06-14 12:39:32,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535660481] [2024-06-14 12:39:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:33,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:33,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535660481] [2024-06-14 12:39:33,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535660481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:33,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:33,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481864775] [2024-06-14 12:39:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:33,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:33,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:33,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:33,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 168 transitions, 1747 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 12:39:33,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:33,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:33,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:33,980 INFO L124 PetriNetUnfolderBase]: 2268/3594 cut-off events. [2024-06-14 12:39:33,980 INFO L125 PetriNetUnfolderBase]: For 123797/123802 co-relation queries the response was YES. [2024-06-14 12:39:33,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22652 conditions, 3594 events. 2268/3594 cut-off events. For 123797/123802 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19710 event pairs, 550 based on Foata normal form. 14/3597 useless extension candidates. Maximal degree in co-relation 22585. Up to 2819 conditions per place. [2024-06-14 12:39:34,009 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-14 12:39:34,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 202 transitions, 2261 flow [2024-06-14 12:39:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:39:34,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:39:34,011 INFO L175 Difference]: Start difference. First operand has 140 places, 168 transitions, 1747 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:39:34,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 202 transitions, 2261 flow [2024-06-14 12:39:34,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 202 transitions, 2106 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:34,181 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 1728 flow [2024-06-14 12:39:34,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1728, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2024-06-14 12:39:34,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 12:39:34,182 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 1728 flow [2024-06-14 12:39:34,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 12:39:34,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:34,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:39:34,183 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:34,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1431643227, now seen corresponding path program 3 times [2024-06-14 12:39:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:34,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537614402] [2024-06-14 12:39:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537614402] [2024-06-14 12:39:35,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537614402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:35,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:35,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831592856] [2024-06-14 12:39:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:35,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:35,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:35,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:35,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 1728 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 12:39:35,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:35,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:35,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:36,004 INFO L124 PetriNetUnfolderBase]: 2248/3562 cut-off events. [2024-06-14 12:39:36,005 INFO L125 PetriNetUnfolderBase]: For 121912/121917 co-relation queries the response was YES. [2024-06-14 12:39:36,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22079 conditions, 3562 events. 2248/3562 cut-off events. For 121912/121917 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19514 event pairs, 502 based on Foata normal form. 14/3565 useless extension candidates. Maximal degree in co-relation 22011. Up to 2137 conditions per place. [2024-06-14 12:39:36,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 73 changer transitions 0/201 dead transitions. [2024-06-14 12:39:36,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 201 transitions, 2178 flow [2024-06-14 12:39:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:39:36,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:39:36,037 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 1728 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:39:36,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 201 transitions, 2178 flow [2024-06-14 12:39:36,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 1946 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:39:36,189 INFO L231 Difference]: Finished difference. Result has 140 places, 167 transitions, 1586 flow [2024-06-14 12:39:36,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1586, PETRI_PLACES=140, PETRI_TRANSITIONS=167} [2024-06-14 12:39:36,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 12:39:36,190 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 167 transitions, 1586 flow [2024-06-14 12:39:36,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 12:39:36,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:36,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:36,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:39:36,190 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)] === [2024-06-14 12:39:36,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1317983776, now seen corresponding path program 2 times [2024-06-14 12:39:36,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:36,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024749225] [2024-06-14 12:39:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:36,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:36,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:36,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024749225] [2024-06-14 12:39:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024749225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:36,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:36,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:36,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387656509] [2024-06-14 12:39:36,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:36,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:36,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:36,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:36,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 167 transitions, 1586 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:36,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:36,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:36,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:37,442 INFO L124 PetriNetUnfolderBase]: 2253/3581 cut-off events. [2024-06-14 12:39:37,443 INFO L125 PetriNetUnfolderBase]: For 120530/120544 co-relation queries the response was YES. [2024-06-14 12:39:37,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21844 conditions, 3581 events. 2253/3581 cut-off events. For 120530/120544 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19733 event pairs, 638 based on Foata normal form. 13/3591 useless extension candidates. Maximal degree in co-relation 21776. Up to 3412 conditions per place. [2024-06-14 12:39:37,472 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 154 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-14 12:39:37,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 186 transitions, 2178 flow [2024-06-14 12:39:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:39:37,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 12:39:37,473 INFO L175 Difference]: Start difference. First operand has 140 places, 167 transitions, 1586 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:39:37,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 186 transitions, 2178 flow [2024-06-14 12:39:37,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 1973 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:37,640 INFO L231 Difference]: Finished difference. Result has 140 places, 173 transitions, 1557 flow [2024-06-14 12:39:37,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1557, PETRI_PLACES=140, PETRI_TRANSITIONS=173} [2024-06-14 12:39:37,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 12:39:37,641 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 173 transitions, 1557 flow [2024-06-14 12:39:37,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:37,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:37,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:37,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:39:37,642 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:37,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:37,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1743766496, now seen corresponding path program 3 times [2024-06-14 12:39:37,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:37,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152133194] [2024-06-14 12:39:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:37,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:38,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:38,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152133194] [2024-06-14 12:39:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152133194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:38,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:38,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717592368] [2024-06-14 12:39:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:38,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:38,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:38,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:38,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 173 transitions, 1557 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:38,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:38,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:38,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:39,038 INFO L124 PetriNetUnfolderBase]: 2257/3576 cut-off events. [2024-06-14 12:39:39,039 INFO L125 PetriNetUnfolderBase]: For 124935/124940 co-relation queries the response was YES. [2024-06-14 12:39:39,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21389 conditions, 3576 events. 2257/3576 cut-off events. For 124935/124940 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19572 event pairs, 649 based on Foata normal form. 4/3569 useless extension candidates. Maximal degree in co-relation 21321. Up to 3248 conditions per place. [2024-06-14 12:39:39,067 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 50 changer transitions 0/199 dead transitions. [2024-06-14 12:39:39,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2291 flow [2024-06-14 12:39:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:39:39,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 12:39:39,073 INFO L175 Difference]: Start difference. First operand has 140 places, 173 transitions, 1557 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:39:39,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2291 flow [2024-06-14 12:39:39,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 199 transitions, 2216 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:39,206 INFO L231 Difference]: Finished difference. Result has 146 places, 186 transitions, 1792 flow [2024-06-14 12:39:39,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1792, PETRI_PLACES=146, PETRI_TRANSITIONS=186} [2024-06-14 12:39:39,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-14 12:39:39,207 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 186 transitions, 1792 flow [2024-06-14 12:39:39,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:39,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:39,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:39,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:39:39,216 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:39,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash -453745342, now seen corresponding path program 3 times [2024-06-14 12:39:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:39,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697873010] [2024-06-14 12:39:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:39,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:39,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697873010] [2024-06-14 12:39:39,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697873010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:39,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:39,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:39,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258165057] [2024-06-14 12:39:39,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:39,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:39,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:40,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:40,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 186 transitions, 1792 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:40,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:40,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:40,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:40,580 INFO L124 PetriNetUnfolderBase]: 2254/3576 cut-off events. [2024-06-14 12:39:40,580 INFO L125 PetriNetUnfolderBase]: For 131884/131886 co-relation queries the response was YES. [2024-06-14 12:39:40,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22147 conditions, 3576 events. 2254/3576 cut-off events. For 131884/131886 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19652 event pairs, 671 based on Foata normal form. 1/3576 useless extension candidates. Maximal degree in co-relation 22075. Up to 3449 conditions per place. [2024-06-14 12:39:40,610 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2024-06-14 12:39:40,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 196 transitions, 2204 flow [2024-06-14 12:39:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 12:39:40,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:39:40,612 INFO L175 Difference]: Start difference. First operand has 146 places, 186 transitions, 1792 flow. Second operand 7 states and 105 transitions. [2024-06-14 12:39:40,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 196 transitions, 2204 flow [2024-06-14 12:39:40,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 196 transitions, 2060 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-14 12:39:40,753 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 1682 flow [2024-06-14 12:39:40,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1682, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-14 12:39:40,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-14 12:39:40,754 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 1682 flow [2024-06-14 12:39:40,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:40,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:40,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:40,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:39:40,754 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:40,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:40,755 INFO L85 PathProgramCache]: Analyzing trace with hash -630824596, now seen corresponding path program 1 times [2024-06-14 12:39:40,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:40,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538399248] [2024-06-14 12:39:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:40,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538399248] [2024-06-14 12:39:41,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538399248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:41,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:41,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:41,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211247038] [2024-06-14 12:39:41,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:41,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:41,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:39:41,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 1682 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:41,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:41,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:39:41,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:42,246 INFO L124 PetriNetUnfolderBase]: 2182/3508 cut-off events. [2024-06-14 12:39:42,246 INFO L125 PetriNetUnfolderBase]: For 139924/139926 co-relation queries the response was YES. [2024-06-14 12:39:42,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21541 conditions, 3508 events. 2182/3508 cut-off events. For 139924/139926 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19537 event pairs, 595 based on Foata normal form. 3/3508 useless extension candidates. Maximal degree in co-relation 21467. Up to 3249 conditions per place. [2024-06-14 12:39:42,278 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 17 changer transitions 0/209 dead transitions. [2024-06-14 12:39:42,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 209 transitions, 2174 flow [2024-06-14 12:39:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:39:42,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:39:42,282 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 1682 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:39:42,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 209 transitions, 2174 flow [2024-06-14 12:39:42,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 209 transitions, 2138 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:42,447 INFO L231 Difference]: Finished difference. Result has 153 places, 192 transitions, 1750 flow [2024-06-14 12:39:42,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=153, PETRI_TRANSITIONS=192} [2024-06-14 12:39:42,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-14 12:39:42,448 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 192 transitions, 1750 flow [2024-06-14 12:39:42,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:42,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:42,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:42,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:39:42,449 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:42,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash -630704626, now seen corresponding path program 2 times [2024-06-14 12:39:42,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:42,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032505053] [2024-06-14 12:39:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:43,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:43,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032505053] [2024-06-14 12:39:43,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032505053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:43,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:43,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:43,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385142211] [2024-06-14 12:39:43,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:43,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:43,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:43,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:43,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:43,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:39:43,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 192 transitions, 1750 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:43,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:43,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:39:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:43,785 INFO L124 PetriNetUnfolderBase]: 2249/3601 cut-off events. [2024-06-14 12:39:43,785 INFO L125 PetriNetUnfolderBase]: For 152900/152904 co-relation queries the response was YES. [2024-06-14 12:39:43,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23002 conditions, 3601 events. 2249/3601 cut-off events. For 152900/152904 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20025 event pairs, 619 based on Foata normal form. 5/3603 useless extension candidates. Maximal degree in co-relation 22926. Up to 3294 conditions per place. [2024-06-14 12:39:43,814 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2024-06-14 12:39:43,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 217 transitions, 2398 flow [2024-06-14 12:39:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:39:43,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 12:39:43,844 INFO L175 Difference]: Start difference. First operand has 153 places, 192 transitions, 1750 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:39:43,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 217 transitions, 2398 flow [2024-06-14 12:39:44,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 217 transitions, 2350 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:44,046 INFO L231 Difference]: Finished difference. Result has 158 places, 200 transitions, 1881 flow [2024-06-14 12:39:44,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1881, PETRI_PLACES=158, PETRI_TRANSITIONS=200} [2024-06-14 12:39:44,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 12:39:44,048 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 200 transitions, 1881 flow [2024-06-14 12:39:44,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:44,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:44,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:44,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:39:44,049 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:44,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash -626062996, now seen corresponding path program 3 times [2024-06-14 12:39:44,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:44,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594415236] [2024-06-14 12:39:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:44,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:44,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:44,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594415236] [2024-06-14 12:39:44,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594415236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:44,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:44,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:44,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791994371] [2024-06-14 12:39:44,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:44,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:44,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:44,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:39:44,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 200 transitions, 1881 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:44,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:44,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:39:44,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:45,384 INFO L124 PetriNetUnfolderBase]: 2251/3607 cut-off events. [2024-06-14 12:39:45,385 INFO L125 PetriNetUnfolderBase]: For 157122/157127 co-relation queries the response was YES. [2024-06-14 12:39:45,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23531 conditions, 3607 events. 2251/3607 cut-off events. For 157122/157127 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20104 event pairs, 624 based on Foata normal form. 6/3606 useless extension candidates. Maximal degree in co-relation 23453. Up to 3252 conditions per place. [2024-06-14 12:39:45,415 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 40 changer transitions 0/224 dead transitions. [2024-06-14 12:39:45,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 224 transitions, 2647 flow [2024-06-14 12:39:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:39:45,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 12:39:45,417 INFO L175 Difference]: Start difference. First operand has 158 places, 200 transitions, 1881 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:39:45,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 224 transitions, 2647 flow [2024-06-14 12:39:45,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 224 transitions, 2575 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:45,608 INFO L231 Difference]: Finished difference. Result has 162 places, 208 transitions, 2030 flow [2024-06-14 12:39:45,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2030, PETRI_PLACES=162, PETRI_TRANSITIONS=208} [2024-06-14 12:39:45,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 12:39:45,608 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 208 transitions, 2030 flow [2024-06-14 12:39:45,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:45,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:45,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:39:45,609 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:45,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1317553186, now seen corresponding path program 1 times [2024-06-14 12:39:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134050399] [2024-06-14 12:39:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134050399] [2024-06-14 12:39:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134050399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:46,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:46,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:46,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763209287] [2024-06-14 12:39:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:46,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:46,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:46,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:46,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 208 transitions, 2030 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:46,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:46,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:46,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:47,290 INFO L124 PetriNetUnfolderBase]: 2345/3701 cut-off events. [2024-06-14 12:39:47,290 INFO L125 PetriNetUnfolderBase]: For 157130/157132 co-relation queries the response was YES. [2024-06-14 12:39:47,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24396 conditions, 3701 events. 2345/3701 cut-off events. For 157130/157132 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20205 event pairs, 655 based on Foata normal form. 2/3702 useless extension candidates. Maximal degree in co-relation 24316. Up to 3571 conditions per place. [2024-06-14 12:39:47,322 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 16 changer transitions 0/222 dead transitions. [2024-06-14 12:39:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 222 transitions, 2548 flow [2024-06-14 12:39:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:39:47,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-14 12:39:47,331 INFO L175 Difference]: Start difference. First operand has 162 places, 208 transitions, 2030 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:39:47,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 222 transitions, 2548 flow [2024-06-14 12:39:47,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 222 transitions, 2432 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:47,504 INFO L231 Difference]: Finished difference. Result has 166 places, 210 transitions, 2005 flow [2024-06-14 12:39:47,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1916, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2005, PETRI_PLACES=166, PETRI_TRANSITIONS=210} [2024-06-14 12:39:47,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 12:39:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 210 transitions, 2005 flow [2024-06-14 12:39:47,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:47,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:47,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:47,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:39:47,505 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:47,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1977667214, now seen corresponding path program 1 times [2024-06-14 12:39:47,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:47,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520889312] [2024-06-14 12:39:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520889312] [2024-06-14 12:39:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520889312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:48,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132557933] [2024-06-14 12:39:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:48,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:48,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 210 transitions, 2005 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:48,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:48,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:48,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:48,920 INFO L124 PetriNetUnfolderBase]: 2355/3721 cut-off events. [2024-06-14 12:39:48,920 INFO L125 PetriNetUnfolderBase]: For 161893/161905 co-relation queries the response was YES. [2024-06-14 12:39:48,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24209 conditions, 3721 events. 2355/3721 cut-off events. For 161893/161905 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20382 event pairs, 602 based on Foata normal form. 12/3731 useless extension candidates. Maximal degree in co-relation 24128. Up to 3449 conditions per place. [2024-06-14 12:39:48,953 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 39 changer transitions 0/238 dead transitions. [2024-06-14 12:39:48,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 238 transitions, 2631 flow [2024-06-14 12:39:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:39:48,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:39:48,954 INFO L175 Difference]: Start difference. First operand has 166 places, 210 transitions, 2005 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:39:48,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 238 transitions, 2631 flow [2024-06-14 12:39:49,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 2558 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:49,207 INFO L231 Difference]: Finished difference. Result has 168 places, 214 transitions, 2103 flow [2024-06-14 12:39:49,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2103, PETRI_PLACES=168, PETRI_TRANSITIONS=214} [2024-06-14 12:39:49,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 12:39:49,208 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 214 transitions, 2103 flow [2024-06-14 12:39:49,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:49,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:49,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:49,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:39:49,208 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:49,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 715448705, now seen corresponding path program 1 times [2024-06-14 12:39:49,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:49,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035438194] [2024-06-14 12:39:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:49,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:49,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:49,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035438194] [2024-06-14 12:39:49,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035438194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:49,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:49,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825981018] [2024-06-14 12:39:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:49,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:49,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:49,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 214 transitions, 2103 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:49,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:49,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:49,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:50,543 INFO L124 PetriNetUnfolderBase]: 2365/3728 cut-off events. [2024-06-14 12:39:50,543 INFO L125 PetriNetUnfolderBase]: For 168871/168879 co-relation queries the response was YES. [2024-06-14 12:39:50,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24890 conditions, 3728 events. 2365/3728 cut-off events. For 168871/168879 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20436 event pairs, 609 based on Foata normal form. 6/3732 useless extension candidates. Maximal degree in co-relation 24808. Up to 3465 conditions per place. [2024-06-14 12:39:50,577 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 35 changer transitions 0/238 dead transitions. [2024-06-14 12:39:50,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 238 transitions, 2697 flow [2024-06-14 12:39:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:39:50,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:39:50,580 INFO L175 Difference]: Start difference. First operand has 168 places, 214 transitions, 2103 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:39:50,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 238 transitions, 2697 flow [2024-06-14 12:39:50,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 238 transitions, 2554 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:50,776 INFO L231 Difference]: Finished difference. Result has 169 places, 218 transitions, 2107 flow [2024-06-14 12:39:50,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2107, PETRI_PLACES=169, PETRI_TRANSITIONS=218} [2024-06-14 12:39:50,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 12:39:50,777 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 218 transitions, 2107 flow [2024-06-14 12:39:50,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:50,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:50,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:50,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:39:50,777 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:50,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1968409157, now seen corresponding path program 2 times [2024-06-14 12:39:50,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:50,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631133850] [2024-06-14 12:39:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:50,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:51,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:51,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631133850] [2024-06-14 12:39:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631133850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:51,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:51,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314461904] [2024-06-14 12:39:51,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:51,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:51,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:51,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:51,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 218 transitions, 2107 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:51,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:51,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:51,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:52,107 INFO L124 PetriNetUnfolderBase]: 2367/3732 cut-off events. [2024-06-14 12:39:52,107 INFO L125 PetriNetUnfolderBase]: For 174617/174625 co-relation queries the response was YES. [2024-06-14 12:39:52,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24940 conditions, 3732 events. 2367/3732 cut-off events. For 174617/174625 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20425 event pairs, 610 based on Foata normal form. 6/3736 useless extension candidates. Maximal degree in co-relation 24857. Up to 3428 conditions per place. [2024-06-14 12:39:52,160 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 44 changer transitions 0/238 dead transitions. [2024-06-14 12:39:52,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 238 transitions, 2779 flow [2024-06-14 12:39:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:39:52,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 12:39:52,162 INFO L175 Difference]: Start difference. First operand has 169 places, 218 transitions, 2107 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:39:52,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 238 transitions, 2779 flow [2024-06-14 12:39:52,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 238 transitions, 2686 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:52,447 INFO L231 Difference]: Finished difference. Result has 171 places, 221 transitions, 2169 flow [2024-06-14 12:39:52,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=171, PETRI_TRANSITIONS=221} [2024-06-14 12:39:52,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 12:39:52,448 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 221 transitions, 2169 flow [2024-06-14 12:39:52,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:52,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:52,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:52,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:39:52,449 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:52,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1968401221, now seen corresponding path program 1 times [2024-06-14 12:39:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:52,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113177930] [2024-06-14 12:39:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:53,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113177930] [2024-06-14 12:39:53,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113177930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:53,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:53,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:53,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093977052] [2024-06-14 12:39:53,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:53,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:53,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:53,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:53,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:53,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 221 transitions, 2169 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:53,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:53,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:53,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:54,252 INFO L124 PetriNetUnfolderBase]: 2372/3741 cut-off events. [2024-06-14 12:39:54,252 INFO L125 PetriNetUnfolderBase]: For 180622/180628 co-relation queries the response was YES. [2024-06-14 12:39:54,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25152 conditions, 3741 events. 2372/3741 cut-off events. For 180622/180628 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20457 event pairs, 622 based on Foata normal form. 7/3747 useless extension candidates. Maximal degree in co-relation 25068. Up to 3593 conditions per place. [2024-06-14 12:39:54,283 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 19 changer transitions 0/242 dead transitions. [2024-06-14 12:39:54,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 2765 flow [2024-06-14 12:39:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:39:54,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:39:54,285 INFO L175 Difference]: Start difference. First operand has 171 places, 221 transitions, 2169 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:39:54,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 2765 flow [2024-06-14 12:39:54,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 242 transitions, 2671 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:54,550 INFO L231 Difference]: Finished difference. Result has 175 places, 224 transitions, 2187 flow [2024-06-14 12:39:54,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2187, PETRI_PLACES=175, PETRI_TRANSITIONS=224} [2024-06-14 12:39:54,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 12:39:54,551 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 224 transitions, 2187 flow [2024-06-14 12:39:54,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:54,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:54,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:54,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:39:54,552 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)] === [2024-06-14 12:39:54,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1968412784, now seen corresponding path program 2 times [2024-06-14 12:39:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:54,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501664911] [2024-06-14 12:39:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:54,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:55,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:55,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501664911] [2024-06-14 12:39:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501664911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:55,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:55,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479286617] [2024-06-14 12:39:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:55,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:55,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:55,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 224 transitions, 2187 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:55,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:55,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:55,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:55,981 INFO L124 PetriNetUnfolderBase]: 2416/3802 cut-off events. [2024-06-14 12:39:55,981 INFO L125 PetriNetUnfolderBase]: For 194410/194418 co-relation queries the response was YES. [2024-06-14 12:39:56,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26143 conditions, 3802 events. 2416/3802 cut-off events. For 194410/194418 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20913 event pairs, 605 based on Foata normal form. 6/3806 useless extension candidates. Maximal degree in co-relation 26058. Up to 3447 conditions per place. [2024-06-14 12:39:56,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 57 changer transitions 0/255 dead transitions. [2024-06-14 12:39:56,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 255 transitions, 3201 flow [2024-06-14 12:39:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:39:56,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:39:56,100 INFO L175 Difference]: Start difference. First operand has 175 places, 224 transitions, 2187 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:39:56,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 255 transitions, 3201 flow [2024-06-14 12:39:56,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 255 transitions, 3111 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:56,311 INFO L231 Difference]: Finished difference. Result has 178 places, 236 transitions, 2516 flow [2024-06-14 12:39:56,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2516, PETRI_PLACES=178, PETRI_TRANSITIONS=236} [2024-06-14 12:39:56,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-14 12:39:56,311 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 236 transitions, 2516 flow [2024-06-14 12:39:56,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:56,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:56,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:39:56,312 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:56,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash -432671260, now seen corresponding path program 3 times [2024-06-14 12:39:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:56,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101896091] [2024-06-14 12:39:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:56,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:56,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101896091] [2024-06-14 12:39:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101896091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:56,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:39:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002245613] [2024-06-14 12:39:56,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:56,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:39:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:39:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:39:57,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:57,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 236 transitions, 2516 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:57,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:57,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:57,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:57,681 INFO L124 PetriNetUnfolderBase]: 2412/3798 cut-off events. [2024-06-14 12:39:57,682 INFO L125 PetriNetUnfolderBase]: For 202289/202297 co-relation queries the response was YES. [2024-06-14 12:39:57,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26774 conditions, 3798 events. 2412/3798 cut-off events. For 202289/202297 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20923 event pairs, 609 based on Foata normal form. 6/3802 useless extension candidates. Maximal degree in co-relation 26687. Up to 3445 conditions per place. [2024-06-14 12:39:57,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 56 changer transitions 0/255 dead transitions. [2024-06-14 12:39:57,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 255 transitions, 3278 flow [2024-06-14 12:39:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:39:57,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:39:57,722 INFO L175 Difference]: Start difference. First operand has 178 places, 236 transitions, 2516 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:39:57,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 255 transitions, 3278 flow [2024-06-14 12:39:58,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 255 transitions, 3078 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-14 12:39:58,081 INFO L231 Difference]: Finished difference. Result has 183 places, 236 transitions, 2436 flow [2024-06-14 12:39:58,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2436, PETRI_PLACES=183, PETRI_TRANSITIONS=236} [2024-06-14 12:39:58,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 12:39:58,082 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 236 transitions, 2436 flow [2024-06-14 12:39:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:58,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:58,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:58,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:39:58,088 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:58,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash 578738167, now seen corresponding path program 3 times [2024-06-14 12:39:58,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:58,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676140827] [2024-06-14 12:39:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:58,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:58,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:58,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676140827] [2024-06-14 12:39:58,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676140827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:58,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:39:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340855639] [2024-06-14 12:39:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:39:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:39:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:39:58,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:39:58,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 236 transitions, 2436 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:58,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:58,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:39:58,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:59,678 INFO L124 PetriNetUnfolderBase]: 2405/3783 cut-off events. [2024-06-14 12:39:59,679 INFO L125 PetriNetUnfolderBase]: For 204899/204901 co-relation queries the response was YES. [2024-06-14 12:39:59,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26655 conditions, 3783 events. 2405/3783 cut-off events. For 204899/204901 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20679 event pairs, 613 based on Foata normal form. 1/3777 useless extension candidates. Maximal degree in co-relation 26566. Up to 3530 conditions per place. [2024-06-14 12:39:59,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 35 changer transitions 0/254 dead transitions. [2024-06-14 12:39:59,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 254 transitions, 2998 flow [2024-06-14 12:39:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:39:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:39:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:39:59,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 12:39:59,733 INFO L175 Difference]: Start difference. First operand has 183 places, 236 transitions, 2436 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:39:59,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 254 transitions, 2998 flow [2024-06-14 12:40:00,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 254 transitions, 2841 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:00,229 INFO L231 Difference]: Finished difference. Result has 183 places, 236 transitions, 2356 flow [2024-06-14 12:40:00,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2356, PETRI_PLACES=183, PETRI_TRANSITIONS=236} [2024-06-14 12:40:00,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 12:40:00,229 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 236 transitions, 2356 flow [2024-06-14 12:40:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:00,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:00,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:40:00,230 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:00,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1922986369, now seen corresponding path program 4 times [2024-06-14 12:40:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:00,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707861818] [2024-06-14 12:40:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707861818] [2024-06-14 12:40:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707861818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:00,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:00,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597273838] [2024-06-14 12:40:00,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:00,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:00,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 236 transitions, 2356 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:00,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:00,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:00,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:01,764 INFO L124 PetriNetUnfolderBase]: 2410/3788 cut-off events. [2024-06-14 12:40:01,765 INFO L125 PetriNetUnfolderBase]: For 211815/211817 co-relation queries the response was YES. [2024-06-14 12:40:01,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26729 conditions, 3788 events. 2410/3788 cut-off events. For 211815/211817 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20695 event pairs, 611 based on Foata normal form. 1/3782 useless extension candidates. Maximal degree in co-relation 26640. Up to 3517 conditions per place. [2024-06-14 12:40:01,799 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 44 changer transitions 0/255 dead transitions. [2024-06-14 12:40:01,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 255 transitions, 2967 flow [2024-06-14 12:40:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:40:01,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 12:40:01,801 INFO L175 Difference]: Start difference. First operand has 183 places, 236 transitions, 2356 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:40:01,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 255 transitions, 2967 flow [2024-06-14 12:40:02,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 255 transitions, 2833 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:02,132 INFO L231 Difference]: Finished difference. Result has 184 places, 240 transitions, 2399 flow [2024-06-14 12:40:02,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=184, PETRI_TRANSITIONS=240} [2024-06-14 12:40:02,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 12:40:02,132 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 240 transitions, 2399 flow [2024-06-14 12:40:02,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:02,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:02,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:40:02,133 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:02,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:02,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1181585023, now seen corresponding path program 5 times [2024-06-14 12:40:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:02,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191088487] [2024-06-14 12:40:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:02,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:02,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:02,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191088487] [2024-06-14 12:40:02,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191088487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:02,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:02,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680180541] [2024-06-14 12:40:02,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:02,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:02,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 240 transitions, 2399 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:02,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:02,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:02,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:03,381 INFO L124 PetriNetUnfolderBase]: 2412/3798 cut-off events. [2024-06-14 12:40:03,381 INFO L125 PetriNetUnfolderBase]: For 219670/219678 co-relation queries the response was YES. [2024-06-14 12:40:03,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26857 conditions, 3798 events. 2412/3798 cut-off events. For 219670/219678 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20832 event pairs, 631 based on Foata normal form. 6/3793 useless extension candidates. Maximal degree in co-relation 26766. Up to 3457 conditions per place. [2024-06-14 12:40:03,416 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 60 changer transitions 0/255 dead transitions. [2024-06-14 12:40:03,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 3097 flow [2024-06-14 12:40:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:40:03,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 12:40:03,417 INFO L175 Difference]: Start difference. First operand has 184 places, 240 transitions, 2399 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:40:03,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 3097 flow [2024-06-14 12:40:03,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 255 transitions, 2993 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:03,849 INFO L231 Difference]: Finished difference. Result has 187 places, 243 transitions, 2477 flow [2024-06-14 12:40:03,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2477, PETRI_PLACES=187, PETRI_TRANSITIONS=243} [2024-06-14 12:40:03,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 12:40:03,850 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 243 transitions, 2477 flow [2024-06-14 12:40:03,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:03,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:03,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:03,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:40:03,851 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:03,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2097883305, now seen corresponding path program 6 times [2024-06-14 12:40:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:03,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801541205] [2024-06-14 12:40:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:03,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:04,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:04,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801541205] [2024-06-14 12:40:04,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801541205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:04,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:04,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:40:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143846098] [2024-06-14 12:40:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:40:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:40:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:40:04,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:04,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 243 transitions, 2477 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:04,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:04,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:04,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:05,296 INFO L124 PetriNetUnfolderBase]: 2407/3790 cut-off events. [2024-06-14 12:40:05,296 INFO L125 PetriNetUnfolderBase]: For 224354/224362 co-relation queries the response was YES. [2024-06-14 12:40:05,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26920 conditions, 3790 events. 2407/3790 cut-off events. For 224354/224362 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20761 event pairs, 631 based on Foata normal form. 5/3784 useless extension candidates. Maximal degree in co-relation 26828. Up to 3452 conditions per place. [2024-06-14 12:40:05,348 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 64 changer transitions 0/254 dead transitions. [2024-06-14 12:40:05,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 254 transitions, 3011 flow [2024-06-14 12:40:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:40:05,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:40:05,350 INFO L175 Difference]: Start difference. First operand has 187 places, 243 transitions, 2477 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:40:05,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 254 transitions, 3011 flow [2024-06-14 12:40:05,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 254 transitions, 2849 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:05,841 INFO L231 Difference]: Finished difference. Result has 190 places, 243 transitions, 2449 flow [2024-06-14 12:40:05,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2449, PETRI_PLACES=190, PETRI_TRANSITIONS=243} [2024-06-14 12:40:05,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-14 12:40:05,842 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 243 transitions, 2449 flow [2024-06-14 12:40:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:05,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:05,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:40:05,842 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:05,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:05,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1181588650, now seen corresponding path program 4 times [2024-06-14 12:40:05,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:05,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200202910] [2024-06-14 12:40:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:05,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:06,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:06,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200202910] [2024-06-14 12:40:06,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200202910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:06,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:06,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:06,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972058762] [2024-06-14 12:40:06,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:06,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:06,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:06,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:06,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 243 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:06,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:06,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:06,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:07,521 INFO L124 PetriNetUnfolderBase]: 2425/3819 cut-off events. [2024-06-14 12:40:07,522 INFO L125 PetriNetUnfolderBase]: For 236550/236558 co-relation queries the response was YES. [2024-06-14 12:40:07,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27319 conditions, 3819 events. 2425/3819 cut-off events. For 236550/236558 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21013 event pairs, 627 based on Foata normal form. 6/3814 useless extension candidates. Maximal degree in co-relation 27226. Up to 3374 conditions per place. [2024-06-14 12:40:07,562 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 86 changer transitions 0/270 dead transitions. [2024-06-14 12:40:07,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 270 transitions, 3637 flow [2024-06-14 12:40:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:40:07,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:40:07,563 INFO L175 Difference]: Start difference. First operand has 190 places, 243 transitions, 2449 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:40:07,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 270 transitions, 3637 flow [2024-06-14 12:40:07,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 270 transitions, 3449 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 12:40:07,933 INFO L231 Difference]: Finished difference. Result has 191 places, 255 transitions, 2753 flow [2024-06-14 12:40:07,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2753, PETRI_PLACES=191, PETRI_TRANSITIONS=255} [2024-06-14 12:40:07,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-14 12:40:07,933 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 255 transitions, 2753 flow [2024-06-14 12:40:07,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:07,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:07,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:07,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:40:07,934 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:07,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1168690480, now seen corresponding path program 5 times [2024-06-14 12:40:07,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:07,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640176352] [2024-06-14 12:40:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:07,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:08,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:08,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640176352] [2024-06-14 12:40:08,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640176352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:08,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:08,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:08,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481310109] [2024-06-14 12:40:08,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:08,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:08,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:08,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:08,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:08,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:08,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 255 transitions, 2753 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:08,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:08,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:08,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:09,420 INFO L124 PetriNetUnfolderBase]: 2453/3865 cut-off events. [2024-06-14 12:40:09,421 INFO L125 PetriNetUnfolderBase]: For 251211/251219 co-relation queries the response was YES. [2024-06-14 12:40:09,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28480 conditions, 3865 events. 2453/3865 cut-off events. For 251211/251219 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21386 event pairs, 659 based on Foata normal form. 6/3869 useless extension candidates. Maximal degree in co-relation 28387. Up to 3686 conditions per place. [2024-06-14 12:40:09,457 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 33 changer transitions 0/275 dead transitions. [2024-06-14 12:40:09,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 275 transitions, 3644 flow [2024-06-14 12:40:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:40:09,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:40:09,459 INFO L175 Difference]: Start difference. First operand has 191 places, 255 transitions, 2753 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:40:09,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 275 transitions, 3644 flow [2024-06-14 12:40:09,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 275 transitions, 3349 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:09,837 INFO L231 Difference]: Finished difference. Result has 196 places, 263 transitions, 2761 flow [2024-06-14 12:40:09,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2504, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2761, PETRI_PLACES=196, PETRI_TRANSITIONS=263} [2024-06-14 12:40:09,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 12:40:09,837 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 263 transitions, 2761 flow [2024-06-14 12:40:09,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:09,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:09,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:09,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:40:09,838 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:09,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 2092177321, now seen corresponding path program 2 times [2024-06-14 12:40:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:09,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957846128] [2024-06-14 12:40:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:09,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:10,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:10,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957846128] [2024-06-14 12:40:10,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957846128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:10,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:10,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:10,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503339183] [2024-06-14 12:40:10,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:10,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:10,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:10,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:10,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 263 transitions, 2761 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:10,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:10,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:10,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:11,554 INFO L124 PetriNetUnfolderBase]: 2458/3878 cut-off events. [2024-06-14 12:40:11,555 INFO L125 PetriNetUnfolderBase]: For 252843/252853 co-relation queries the response was YES. [2024-06-14 12:40:11,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27962 conditions, 3878 events. 2458/3878 cut-off events. For 252843/252853 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21458 event pairs, 619 based on Foata normal form. 9/3884 useless extension candidates. Maximal degree in co-relation 27867. Up to 3698 conditions per place. [2024-06-14 12:40:11,611 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 31 changer transitions 0/279 dead transitions. [2024-06-14 12:40:11,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 279 transitions, 3423 flow [2024-06-14 12:40:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:40:11,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:40:11,613 INFO L175 Difference]: Start difference. First operand has 196 places, 263 transitions, 2761 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:40:11,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 279 transitions, 3423 flow [2024-06-14 12:40:12,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 279 transitions, 3216 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:12,204 INFO L231 Difference]: Finished difference. Result has 198 places, 266 transitions, 2698 flow [2024-06-14 12:40:12,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2698, PETRI_PLACES=198, PETRI_TRANSITIONS=266} [2024-06-14 12:40:12,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 12:40:12,207 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 266 transitions, 2698 flow [2024-06-14 12:40:12,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:12,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:12,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:12,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:40:12,208 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)] === [2024-06-14 12:40:12,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1168244607, now seen corresponding path program 3 times [2024-06-14 12:40:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:12,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056048531] [2024-06-14 12:40:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056048531] [2024-06-14 12:40:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056048531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:13,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:13,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35189339] [2024-06-14 12:40:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:13,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:13,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 266 transitions, 2698 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:13,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:13,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:13,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:13,941 INFO L124 PetriNetUnfolderBase]: 2463/3878 cut-off events. [2024-06-14 12:40:13,942 INFO L125 PetriNetUnfolderBase]: For 262457/262459 co-relation queries the response was YES. [2024-06-14 12:40:13,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28046 conditions, 3878 events. 2463/3878 cut-off events. For 262457/262459 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21451 event pairs, 650 based on Foata normal form. 1/3878 useless extension candidates. Maximal degree in co-relation 27952. Up to 3732 conditions per place. [2024-06-14 12:40:13,980 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 23 changer transitions 0/285 dead transitions. [2024-06-14 12:40:13,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 285 transitions, 3564 flow [2024-06-14 12:40:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 12:40:13,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35501355013550134 [2024-06-14 12:40:13,982 INFO L175 Difference]: Start difference. First operand has 198 places, 266 transitions, 2698 flow. Second operand 9 states and 131 transitions. [2024-06-14 12:40:13,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 285 transitions, 3564 flow [2024-06-14 12:40:14,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 285 transitions, 3442 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:14,436 INFO L231 Difference]: Finished difference. Result has 201 places, 272 transitions, 2786 flow [2024-06-14 12:40:14,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2786, PETRI_PLACES=201, PETRI_TRANSITIONS=272} [2024-06-14 12:40:14,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 12:40:14,437 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 272 transitions, 2786 flow [2024-06-14 12:40:14,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:14,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:14,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:14,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:40:14,438 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)] === [2024-06-14 12:40:14,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2092176918, now seen corresponding path program 6 times [2024-06-14 12:40:14,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:14,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162510759] [2024-06-14 12:40:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:14,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:15,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:15,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162510759] [2024-06-14 12:40:15,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162510759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:15,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:15,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:15,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491246090] [2024-06-14 12:40:15,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:15,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:15,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:15,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:15,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:15,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:15,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 272 transitions, 2786 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:15,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:15,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:15,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:15,906 INFO L124 PetriNetUnfolderBase]: 2459/3873 cut-off events. [2024-06-14 12:40:15,907 INFO L125 PetriNetUnfolderBase]: For 269277/269285 co-relation queries the response was YES. [2024-06-14 12:40:15,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28143 conditions, 3873 events. 2459/3873 cut-off events. For 269277/269285 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21379 event pairs, 627 based on Foata normal form. 6/3868 useless extension candidates. Maximal degree in co-relation 28048. Up to 3414 conditions per place. [2024-06-14 12:40:15,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 89 changer transitions 0/287 dead transitions. [2024-06-14 12:40:15,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 287 transitions, 3754 flow [2024-06-14 12:40:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:40:15,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:40:15,944 INFO L175 Difference]: Start difference. First operand has 201 places, 272 transitions, 2786 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:40:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 287 transitions, 3754 flow [2024-06-14 12:40:16,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 287 transitions, 3596 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:16,378 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 2814 flow [2024-06-14 12:40:16,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2814, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-14 12:40:16,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 12:40:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 2814 flow [2024-06-14 12:40:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:16,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:16,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:16,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:40:16,379 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)] === [2024-06-14 12:40:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2105064331, now seen corresponding path program 4 times [2024-06-14 12:40:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:16,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024293861] [2024-06-14 12:40:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:17,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:17,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024293861] [2024-06-14 12:40:17,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024293861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:17,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:17,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:17,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120029958] [2024-06-14 12:40:17,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:17,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:17,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:17,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:17,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 2814 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:17,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:17,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:17,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:17,993 INFO L124 PetriNetUnfolderBase]: 2456/3870 cut-off events. [2024-06-14 12:40:17,993 INFO L125 PetriNetUnfolderBase]: For 274875/274877 co-relation queries the response was YES. [2024-06-14 12:40:18,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28342 conditions, 3870 events. 2456/3870 cut-off events. For 274875/274877 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21405 event pairs, 649 based on Foata normal form. 1/3870 useless extension candidates. Maximal degree in co-relation 28245. Up to 3730 conditions per place. [2024-06-14 12:40:18,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 17 changer transitions 0/283 dead transitions. [2024-06-14 12:40:18,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 283 transitions, 3402 flow [2024-06-14 12:40:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:40:18,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-14 12:40:18,032 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 2814 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:40:18,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 283 transitions, 3402 flow [2024-06-14 12:40:18,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 283 transitions, 3119 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 12:40:18,482 INFO L231 Difference]: Finished difference. Result has 204 places, 272 transitions, 2571 flow [2024-06-14 12:40:18,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2571, PETRI_PLACES=204, PETRI_TRANSITIONS=272} [2024-06-14 12:40:18,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 12:40:18,483 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 272 transitions, 2571 flow [2024-06-14 12:40:18,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:18,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:18,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:18,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:40:18,484 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:18,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1919185025, now seen corresponding path program 1 times [2024-06-14 12:40:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210464002] [2024-06-14 12:40:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:19,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:19,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210464002] [2024-06-14 12:40:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210464002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:19,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:19,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:19,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303451270] [2024-06-14 12:40:19,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:19,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:19,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:19,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:40:19,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 272 transitions, 2571 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) [2024-06-14 12:40:19,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:19,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:40:19,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:20,035 INFO L124 PetriNetUnfolderBase]: 2345/3753 cut-off events. [2024-06-14 12:40:20,035 INFO L125 PetriNetUnfolderBase]: For 282218/282220 co-relation queries the response was YES. [2024-06-14 12:40:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27373 conditions, 3753 events. 2345/3753 cut-off events. For 282218/282220 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21143 event pairs, 611 based on Foata normal form. 2/3750 useless extension candidates. Maximal degree in co-relation 27277. Up to 3475 conditions per place. [2024-06-14 12:40:20,071 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 254 selfloop transitions, 19 changer transitions 0/292 dead transitions. [2024-06-14 12:40:20,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 292 transitions, 3221 flow [2024-06-14 12:40:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:40:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:40:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:40:20,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:40:20,072 INFO L175 Difference]: Start difference. First operand has 204 places, 272 transitions, 2571 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:40:20,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 292 transitions, 3221 flow [2024-06-14 12:40:20,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 292 transitions, 3177 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:20,478 INFO L231 Difference]: Finished difference. Result has 204 places, 275 transitions, 2633 flow [2024-06-14 12:40:20,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2633, PETRI_PLACES=204, PETRI_TRANSITIONS=275} [2024-06-14 12:40:20,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 12:40:20,479 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 275 transitions, 2633 flow [2024-06-14 12:40:20,479 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) [2024-06-14 12:40:20,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:20,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:20,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:40:20,479 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:20,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:20,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1923000257, now seen corresponding path program 1 times [2024-06-14 12:40:20,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:20,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103792099] [2024-06-14 12:40:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:21,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:21,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103792099] [2024-06-14 12:40:21,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103792099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:21,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:21,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:21,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133702233] [2024-06-14 12:40:21,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:21,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:21,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:21,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:21,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 275 transitions, 2633 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:21,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:21,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:21,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:22,041 INFO L124 PetriNetUnfolderBase]: 2443/3852 cut-off events. [2024-06-14 12:40:22,041 INFO L125 PetriNetUnfolderBase]: For 283880/283882 co-relation queries the response was YES. [2024-06-14 12:40:22,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28019 conditions, 3852 events. 2443/3852 cut-off events. For 283880/283882 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21242 event pairs, 646 based on Foata normal form. 1/3852 useless extension candidates. Maximal degree in co-relation 27922. Up to 3706 conditions per place. [2024-06-14 12:40:22,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 17 changer transitions 0/291 dead transitions. [2024-06-14 12:40:22,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 3277 flow [2024-06-14 12:40:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 12:40:22,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:40:22,082 INFO L175 Difference]: Start difference. First operand has 204 places, 275 transitions, 2633 flow. Second operand 8 states and 120 transitions. [2024-06-14 12:40:22,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 3277 flow [2024-06-14 12:40:22,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 291 transitions, 3213 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:22,554 INFO L231 Difference]: Finished difference. Result has 207 places, 277 transitions, 2643 flow [2024-06-14 12:40:22,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2643, PETRI_PLACES=207, PETRI_TRANSITIONS=277} [2024-06-14 12:40:22,554 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 12:40:22,554 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 277 transitions, 2643 flow [2024-06-14 12:40:22,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:22,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:22,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:22,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:40:22,555 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:22,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1168238655, now seen corresponding path program 2 times [2024-06-14 12:40:22,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854790096] [2024-06-14 12:40:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:23,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854790096] [2024-06-14 12:40:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854790096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:23,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:23,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739531069] [2024-06-14 12:40:23,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:23,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:23,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 277 transitions, 2643 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:23,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:23,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:23,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:24,183 INFO L124 PetriNetUnfolderBase]: 2448/3861 cut-off events. [2024-06-14 12:40:24,184 INFO L125 PetriNetUnfolderBase]: For 292879/292884 co-relation queries the response was YES. [2024-06-14 12:40:24,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28159 conditions, 3861 events. 2448/3861 cut-off events. For 292879/292884 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21327 event pairs, 649 based on Foata normal form. 1/3859 useless extension candidates. Maximal degree in co-relation 28061. Up to 3591 conditions per place. [2024-06-14 12:40:24,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 60 changer transitions 0/308 dead transitions. [2024-06-14 12:40:24,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 308 transitions, 3551 flow [2024-06-14 12:40:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:40:24,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:40:24,221 INFO L175 Difference]: Start difference. First operand has 207 places, 277 transitions, 2643 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:40:24,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 308 transitions, 3551 flow [2024-06-14 12:40:24,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 308 transitions, 3477 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:24,656 INFO L231 Difference]: Finished difference. Result has 210 places, 293 transitions, 2852 flow [2024-06-14 12:40:24,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2852, PETRI_PLACES=210, PETRI_TRANSITIONS=293} [2024-06-14 12:40:24,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 12:40:24,657 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 293 transitions, 2852 flow [2024-06-14 12:40:24,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:24,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:24,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:24,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:40:24,657 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)] === [2024-06-14 12:40:24,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1175655405, now seen corresponding path program 3 times [2024-06-14 12:40:24,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:24,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800285367] [2024-06-14 12:40:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:24,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:25,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800285367] [2024-06-14 12:40:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800285367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:25,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:25,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704402422] [2024-06-14 12:40:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:25,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:25,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:25,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:25,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 293 transitions, 2852 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:25,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:25,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:25,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:26,202 INFO L124 PetriNetUnfolderBase]: 2478/3904 cut-off events. [2024-06-14 12:40:26,203 INFO L125 PetriNetUnfolderBase]: For 306284/306289 co-relation queries the response was YES. [2024-06-14 12:40:26,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28795 conditions, 3904 events. 2478/3904 cut-off events. For 306284/306289 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21619 event pairs, 633 based on Foata normal form. 3/3904 useless extension candidates. Maximal degree in co-relation 28695. Up to 3656 conditions per place. [2024-06-14 12:40:26,242 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 260 selfloop transitions, 54 changer transitions 0/318 dead transitions. [2024-06-14 12:40:26,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 318 transitions, 3640 flow [2024-06-14 12:40:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:40:26,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:40:26,243 INFO L175 Difference]: Start difference. First operand has 210 places, 293 transitions, 2852 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:40:26,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 318 transitions, 3640 flow [2024-06-14 12:40:26,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 318 transitions, 3592 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:40:26,731 INFO L231 Difference]: Finished difference. Result has 216 places, 302 transitions, 3032 flow [2024-06-14 12:40:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3032, PETRI_PLACES=216, PETRI_TRANSITIONS=302} [2024-06-14 12:40:26,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 12:40:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 302 transitions, 3032 flow [2024-06-14 12:40:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:40:26,732 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:26,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1175857215, now seen corresponding path program 4 times [2024-06-14 12:40:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972881621] [2024-06-14 12:40:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:27,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:27,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972881621] [2024-06-14 12:40:27,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972881621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:27,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:27,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:27,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020620487] [2024-06-14 12:40:27,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:27,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:27,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:27,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:27,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:27,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:27,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 302 transitions, 3032 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:27,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:27,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:27,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:28,292 INFO L124 PetriNetUnfolderBase]: 2471/3892 cut-off events. [2024-06-14 12:40:28,292 INFO L125 PetriNetUnfolderBase]: For 308639/308647 co-relation queries the response was YES. [2024-06-14 12:40:28,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28951 conditions, 3892 events. 2471/3892 cut-off events. For 308639/308647 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21488 event pairs, 654 based on Foata normal form. 5/3895 useless extension candidates. Maximal degree in co-relation 28849. Up to 3730 conditions per place. [2024-06-14 12:40:28,332 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 29 changer transitions 0/316 dead transitions. [2024-06-14 12:40:28,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 316 transitions, 3732 flow [2024-06-14 12:40:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:40:28,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:40:28,334 INFO L175 Difference]: Start difference. First operand has 216 places, 302 transitions, 3032 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:40:28,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 316 transitions, 3732 flow [2024-06-14 12:40:28,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 316 transitions, 3602 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:28,695 INFO L231 Difference]: Finished difference. Result has 219 places, 305 transitions, 3016 flow [2024-06-14 12:40:28,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3016, PETRI_PLACES=219, PETRI_TRANSITIONS=305} [2024-06-14 12:40:28,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 12:40:28,696 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 305 transitions, 3016 flow [2024-06-14 12:40:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:28,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:28,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:40:28,696 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:28,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash -823720837, now seen corresponding path program 1 times [2024-06-14 12:40:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:28,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010474333] [2024-06-14 12:40:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:28,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010474333] [2024-06-14 12:40:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010474333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:29,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:29,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929280433] [2024-06-14 12:40:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:29,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:29,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 305 transitions, 3016 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:29,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:29,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:29,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:30,354 INFO L124 PetriNetUnfolderBase]: 2487/3919 cut-off events. [2024-06-14 12:40:30,355 INFO L125 PetriNetUnfolderBase]: For 322335/322345 co-relation queries the response was YES. [2024-06-14 12:40:30,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29154 conditions, 3919 events. 2487/3919 cut-off events. For 322335/322345 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21592 event pairs, 464 based on Foata normal form. 12/3929 useless extension candidates. Maximal degree in co-relation 29051. Up to 3577 conditions per place. [2024-06-14 12:40:30,414 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 296 selfloop transitions, 37 changer transitions 0/337 dead transitions. [2024-06-14 12:40:30,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 337 transitions, 3850 flow [2024-06-14 12:40:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:40:30,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:40:30,416 INFO L175 Difference]: Start difference. First operand has 219 places, 305 transitions, 3016 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:40:30,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 337 transitions, 3850 flow [2024-06-14 12:40:31,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 337 transitions, 3766 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:40:31,272 INFO L231 Difference]: Finished difference. Result has 222 places, 308 transitions, 3092 flow [2024-06-14 12:40:31,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3092, PETRI_PLACES=222, PETRI_TRANSITIONS=308} [2024-06-14 12:40:31,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 12:40:31,273 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 308 transitions, 3092 flow [2024-06-14 12:40:31,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:31,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:31,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:31,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:40:31,273 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:31,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:31,274 INFO L85 PathProgramCache]: Analyzing trace with hash 585863763, now seen corresponding path program 2 times [2024-06-14 12:40:31,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:31,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154837270] [2024-06-14 12:40:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:31,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:32,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:32,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154837270] [2024-06-14 12:40:32,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154837270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:32,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:32,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:32,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124314090] [2024-06-14 12:40:32,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:32,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:32,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:32,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:32,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:32,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:32,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 308 transitions, 3092 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:32,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:32,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:32,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:32,845 INFO L124 PetriNetUnfolderBase]: 2503/3943 cut-off events. [2024-06-14 12:40:32,846 INFO L125 PetriNetUnfolderBase]: For 332535/332545 co-relation queries the response was YES. [2024-06-14 12:40:32,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29815 conditions, 3943 events. 2503/3943 cut-off events. For 332535/332545 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21788 event pairs, 600 based on Foata normal form. 12/3953 useless extension candidates. Maximal degree in co-relation 29711. Up to 3654 conditions per place. [2024-06-14 12:40:32,888 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 294 selfloop transitions, 38 changer transitions 0/336 dead transitions. [2024-06-14 12:40:32,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 3918 flow [2024-06-14 12:40:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:40:32,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:40:32,889 INFO L175 Difference]: Start difference. First operand has 222 places, 308 transitions, 3092 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:40:32,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 3918 flow [2024-06-14 12:40:33,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 336 transitions, 3780 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:33,513 INFO L231 Difference]: Finished difference. Result has 224 places, 311 transitions, 3122 flow [2024-06-14 12:40:33,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3122, PETRI_PLACES=224, PETRI_TRANSITIONS=311} [2024-06-14 12:40:33,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 12:40:33,514 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 311 transitions, 3122 flow [2024-06-14 12:40:33,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:33,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:33,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:33,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:40:33,515 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)] === [2024-06-14 12:40:33,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash 594206545, now seen corresponding path program 1 times [2024-06-14 12:40:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:33,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125602581] [2024-06-14 12:40:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:34,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125602581] [2024-06-14 12:40:34,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125602581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:34,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:34,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:34,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96875461] [2024-06-14 12:40:34,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:34,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:34,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:34,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 311 transitions, 3122 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:40:34,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:34,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:34,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:35,195 INFO L124 PetriNetUnfolderBase]: 2559/4027 cut-off events. [2024-06-14 12:40:35,195 INFO L125 PetriNetUnfolderBase]: For 350555/350562 co-relation queries the response was YES. [2024-06-14 12:40:35,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30809 conditions, 4027 events. 2559/4027 cut-off events. For 350555/350562 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22238 event pairs, 543 based on Foata normal form. 8/4032 useless extension candidates. Maximal degree in co-relation 30704. Up to 3365 conditions per place. [2024-06-14 12:40:35,237 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 262 selfloop transitions, 87 changer transitions 0/353 dead transitions. [2024-06-14 12:40:35,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 353 transitions, 4390 flow [2024-06-14 12:40:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:40:35,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:40:35,239 INFO L175 Difference]: Start difference. First operand has 224 places, 311 transitions, 3122 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:40:35,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 353 transitions, 4390 flow [2024-06-14 12:40:35,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 353 transitions, 4244 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:35,824 INFO L231 Difference]: Finished difference. Result has 229 places, 322 transitions, 3389 flow [2024-06-14 12:40:35,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3389, PETRI_PLACES=229, PETRI_TRANSITIONS=322} [2024-06-14 12:40:35,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 12:40:35,824 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 322 transitions, 3389 flow [2024-06-14 12:40:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:40:35,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:35,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:35,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:40:35,825 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)] === [2024-06-14 12:40:35,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1819685001, now seen corresponding path program 3 times [2024-06-14 12:40:35,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:35,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113268278] [2024-06-14 12:40:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:35,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:36,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:36,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113268278] [2024-06-14 12:40:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113268278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:36,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253946786] [2024-06-14 12:40:36,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:36,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:36,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 322 transitions, 3389 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:36,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:36,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:36,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:37,302 INFO L124 PetriNetUnfolderBase]: 2575/4031 cut-off events. [2024-06-14 12:40:37,302 INFO L125 PetriNetUnfolderBase]: For 364145/364153 co-relation queries the response was YES. [2024-06-14 12:40:37,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31977 conditions, 4031 events. 2575/4031 cut-off events. For 364145/364153 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22169 event pairs, 599 based on Foata normal form. 8/4037 useless extension candidates. Maximal degree in co-relation 31869. Up to 3714 conditions per place. [2024-06-14 12:40:37,344 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 291 selfloop transitions, 48 changer transitions 0/343 dead transitions. [2024-06-14 12:40:37,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 343 transitions, 4213 flow [2024-06-14 12:40:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:40:37,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:40:37,347 INFO L175 Difference]: Start difference. First operand has 229 places, 322 transitions, 3389 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:40:37,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 343 transitions, 4213 flow [2024-06-14 12:40:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 343 transitions, 4008 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:38,214 INFO L231 Difference]: Finished difference. Result has 233 places, 325 transitions, 3384 flow [2024-06-14 12:40:38,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3184, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3384, PETRI_PLACES=233, PETRI_TRANSITIONS=325} [2024-06-14 12:40:38,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 12:40:38,215 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 325 transitions, 3384 flow [2024-06-14 12:40:38,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:38,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:38,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:38,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:40:38,216 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)] === [2024-06-14 12:40:38,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 703954605, now seen corresponding path program 1 times [2024-06-14 12:40:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836844727] [2024-06-14 12:40:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:38,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836844727] [2024-06-14 12:40:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836844727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:38,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:38,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:38,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794543330] [2024-06-14 12:40:38,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:39,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:39,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 325 transitions, 3384 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:39,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:39,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:39,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:39,819 INFO L124 PetriNetUnfolderBase]: 2595/4056 cut-off events. [2024-06-14 12:40:39,820 INFO L125 PetriNetUnfolderBase]: For 373567/373572 co-relation queries the response was YES. [2024-06-14 12:40:39,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32359 conditions, 4056 events. 2595/4056 cut-off events. For 373567/373572 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22262 event pairs, 550 based on Foata normal form. 4/4057 useless extension candidates. Maximal degree in co-relation 32249. Up to 3478 conditions per place. [2024-06-14 12:40:39,860 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 277 selfloop transitions, 83 changer transitions 0/364 dead transitions. [2024-06-14 12:40:39,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 364 transitions, 4345 flow [2024-06-14 12:40:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:40:39,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 12:40:39,861 INFO L175 Difference]: Start difference. First operand has 233 places, 325 transitions, 3384 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:40:39,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 364 transitions, 4345 flow [2024-06-14 12:40:40,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 364 transitions, 4167 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:40,506 INFO L231 Difference]: Finished difference. Result has 236 places, 338 transitions, 3557 flow [2024-06-14 12:40:40,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3557, PETRI_PLACES=236, PETRI_TRANSITIONS=338} [2024-06-14 12:40:40,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 12:40:40,507 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 338 transitions, 3557 flow [2024-06-14 12:40:40,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:40,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:40,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:40,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:40:40,507 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:40,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 704074761, now seen corresponding path program 1 times [2024-06-14 12:40:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:40,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842397952] [2024-06-14 12:40:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:40,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:41,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:41,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842397952] [2024-06-14 12:40:41,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842397952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:41,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:41,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:41,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509670437] [2024-06-14 12:40:41,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:41,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:41,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:41,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:41,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 338 transitions, 3557 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:41,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:41,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:41,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:42,080 INFO L124 PetriNetUnfolderBase]: 2605/4081 cut-off events. [2024-06-14 12:40:42,081 INFO L125 PetriNetUnfolderBase]: For 378997/379005 co-relation queries the response was YES. [2024-06-14 12:40:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33420 conditions, 4081 events. 2605/4081 cut-off events. For 378997/379005 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22522 event pairs, 555 based on Foata normal form. 6/4085 useless extension candidates. Maximal degree in co-relation 33308. Up to 3800 conditions per place. [2024-06-14 12:40:42,124 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 39 changer transitions 0/363 dead transitions. [2024-06-14 12:40:42,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 363 transitions, 4418 flow [2024-06-14 12:40:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:40:42,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:40:42,125 INFO L175 Difference]: Start difference. First operand has 236 places, 338 transitions, 3557 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:40:42,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 363 transitions, 4418 flow [2024-06-14 12:40:42,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 363 transitions, 4226 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:42,856 INFO L231 Difference]: Finished difference. Result has 240 places, 342 transitions, 3533 flow [2024-06-14 12:40:42,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3533, PETRI_PLACES=240, PETRI_TRANSITIONS=342} [2024-06-14 12:40:42,857 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-14 12:40:42,857 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 342 transitions, 3533 flow [2024-06-14 12:40:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:42,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:42,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:40:42,858 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1068272043, now seen corresponding path program 2 times [2024-06-14 12:40:42,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321838209] [2024-06-14 12:40:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321838209] [2024-06-14 12:40:43,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321838209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:43,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:43,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150710636] [2024-06-14 12:40:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:43,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:43,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 342 transitions, 3533 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:43,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:43,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:43,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:44,674 INFO L124 PetriNetUnfolderBase]: 2641/4130 cut-off events. [2024-06-14 12:40:44,674 INFO L125 PetriNetUnfolderBase]: For 400784/400789 co-relation queries the response was YES. [2024-06-14 12:40:44,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33822 conditions, 4130 events. 2641/4130 cut-off events. For 400784/400789 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22772 event pairs, 554 based on Foata normal form. 4/4131 useless extension candidates. Maximal degree in co-relation 33709. Up to 3500 conditions per place. [2024-06-14 12:40:44,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 92 changer transitions 0/374 dead transitions. [2024-06-14 12:40:44,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 374 transitions, 4669 flow [2024-06-14 12:40:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:40:44,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:40:44,723 INFO L175 Difference]: Start difference. First operand has 240 places, 342 transitions, 3533 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:40:44,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 374 transitions, 4669 flow [2024-06-14 12:40:45,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 374 transitions, 4546 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:45,440 INFO L231 Difference]: Finished difference. Result has 242 places, 350 transitions, 3777 flow [2024-06-14 12:40:45,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3777, PETRI_PLACES=242, PETRI_TRANSITIONS=350} [2024-06-14 12:40:45,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 12:40:45,440 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 350 transitions, 3777 flow [2024-06-14 12:40:45,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:45,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:45,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:45,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:40:45,441 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)] === [2024-06-14 12:40:45,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1819808319, now seen corresponding path program 2 times [2024-06-14 12:40:45,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:45,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168524729] [2024-06-14 12:40:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:45,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:46,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168524729] [2024-06-14 12:40:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168524729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:46,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:46,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471289036] [2024-06-14 12:40:46,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:46,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:46,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 350 transitions, 3777 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:46,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:46,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:46,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:46,956 INFO L124 PetriNetUnfolderBase]: 2659/4148 cut-off events. [2024-06-14 12:40:46,957 INFO L125 PetriNetUnfolderBase]: For 413897/413905 co-relation queries the response was YES. [2024-06-14 12:40:46,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34922 conditions, 4148 events. 2659/4148 cut-off events. For 413897/413905 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22829 event pairs, 547 based on Foata normal form. 6/4152 useless extension candidates. Maximal degree in co-relation 34808. Up to 3786 conditions per place. [2024-06-14 12:40:47,002 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 66 changer transitions 0/376 dead transitions. [2024-06-14 12:40:47,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 376 transitions, 5027 flow [2024-06-14 12:40:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:40:47,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:40:47,003 INFO L175 Difference]: Start difference. First operand has 242 places, 350 transitions, 3777 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:40:47,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 376 transitions, 5027 flow [2024-06-14 12:40:47,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 376 transitions, 4836 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:47,925 INFO L231 Difference]: Finished difference. Result has 246 places, 357 transitions, 3881 flow [2024-06-14 12:40:47,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3881, PETRI_PLACES=246, PETRI_TRANSITIONS=357} [2024-06-14 12:40:47,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 12:40:47,926 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 357 transitions, 3881 flow [2024-06-14 12:40:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:47,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:47,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:40:47,927 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:47,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash 881206095, now seen corresponding path program 3 times [2024-06-14 12:40:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260546604] [2024-06-14 12:40:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260546604] [2024-06-14 12:40:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260546604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:48,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:48,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:48,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242490902] [2024-06-14 12:40:48,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:48,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:48,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:48,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:48,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 357 transitions, 3881 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:48,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:48,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:48,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:49,900 INFO L124 PetriNetUnfolderBase]: 2711/4233 cut-off events. [2024-06-14 12:40:49,900 INFO L125 PetriNetUnfolderBase]: For 439509/439514 co-relation queries the response was YES. [2024-06-14 12:40:49,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36017 conditions, 4233 events. 2711/4233 cut-off events. For 439509/439514 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23347 event pairs, 580 based on Foata normal form. 4/4234 useless extension candidates. Maximal degree in co-relation 35901. Up to 3459 conditions per place. [2024-06-14 12:40:49,943 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 100 changer transitions 0/385 dead transitions. [2024-06-14 12:40:49,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 385 transitions, 5043 flow [2024-06-14 12:40:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:40:49,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:40:49,944 INFO L175 Difference]: Start difference. First operand has 246 places, 357 transitions, 3881 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:40:49,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 385 transitions, 5043 flow [2024-06-14 12:40:50,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 385 transitions, 4910 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:50,884 INFO L231 Difference]: Finished difference. Result has 250 places, 364 transitions, 4113 flow [2024-06-14 12:40:50,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4113, PETRI_PLACES=250, PETRI_TRANSITIONS=364} [2024-06-14 12:40:50,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 12:40:50,884 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 364 transitions, 4113 flow [2024-06-14 12:40:50,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:50,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:50,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:50,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:40:50,885 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:50,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:50,885 INFO L85 PathProgramCache]: Analyzing trace with hash 881443431, now seen corresponding path program 3 times [2024-06-14 12:40:50,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:50,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267648160] [2024-06-14 12:40:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:51,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267648160] [2024-06-14 12:40:51,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267648160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:51,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:51,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283119315] [2024-06-14 12:40:51,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:51,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:51,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:51,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:51,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 364 transitions, 4113 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:51,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:51,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:51,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:52,387 INFO L124 PetriNetUnfolderBase]: 2705/4228 cut-off events. [2024-06-14 12:40:52,387 INFO L125 PetriNetUnfolderBase]: For 442246/442254 co-relation queries the response was YES. [2024-06-14 12:40:52,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36560 conditions, 4228 events. 2705/4228 cut-off events. For 442246/442254 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23362 event pairs, 562 based on Foata normal form. 6/4232 useless extension candidates. Maximal degree in co-relation 36443. Up to 3853 conditions per place. [2024-06-14 12:40:52,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 312 selfloop transitions, 66 changer transitions 0/382 dead transitions. [2024-06-14 12:40:52,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 382 transitions, 5075 flow [2024-06-14 12:40:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:40:52,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:40:52,438 INFO L175 Difference]: Start difference. First operand has 250 places, 364 transitions, 4113 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:40:52,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 382 transitions, 5075 flow [2024-06-14 12:40:53,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 382 transitions, 4847 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-14 12:40:53,341 INFO L231 Difference]: Finished difference. Result has 254 places, 364 transitions, 4027 flow [2024-06-14 12:40:53,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4027, PETRI_PLACES=254, PETRI_TRANSITIONS=364} [2024-06-14 12:40:53,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 12:40:53,342 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 364 transitions, 4027 flow [2024-06-14 12:40:53,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:53,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:53,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:40:53,343 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:53,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -891252743, now seen corresponding path program 2 times [2024-06-14 12:40:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970373358] [2024-06-14 12:40:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:54,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970373358] [2024-06-14 12:40:54,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970373358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:54,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:54,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846685017] [2024-06-14 12:40:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:54,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:54,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 364 transitions, 4027 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:40:54,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:54,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:54,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:55,204 INFO L124 PetriNetUnfolderBase]: 2715/4244 cut-off events. [2024-06-14 12:40:55,205 INFO L125 PetriNetUnfolderBase]: For 451149/451157 co-relation queries the response was YES. [2024-06-14 12:40:55,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36725 conditions, 4244 events. 2715/4244 cut-off events. For 451149/451157 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23484 event pairs, 553 based on Foata normal form. 6/4248 useless extension candidates. Maximal degree in co-relation 36606. Up to 3861 conditions per place. [2024-06-14 12:40:55,252 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 311 selfloop transitions, 72 changer transitions 0/387 dead transitions. [2024-06-14 12:40:55,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 387 transitions, 5119 flow [2024-06-14 12:40:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:40:55,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 12:40:55,254 INFO L175 Difference]: Start difference. First operand has 254 places, 364 transitions, 4027 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:40:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 387 transitions, 5119 flow [2024-06-14 12:40:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 387 transitions, 5009 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:56,121 INFO L231 Difference]: Finished difference. Result has 257 places, 368 transitions, 4192 flow [2024-06-14 12:40:56,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3917, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4192, PETRI_PLACES=257, PETRI_TRANSITIONS=368} [2024-06-14 12:40:56,122 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-14 12:40:56,122 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 368 transitions, 4192 flow [2024-06-14 12:40:56,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:40:56,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:56,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:40:56,123 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:56,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -890894259, now seen corresponding path program 1 times [2024-06-14 12:40:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:56,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505459285] [2024-06-14 12:40:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:56,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:57,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:57,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505459285] [2024-06-14 12:40:57,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505459285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:57,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:57,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871437417] [2024-06-14 12:40:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:57,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:57,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:40:57,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 368 transitions, 4192 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:40:57,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:57,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:40:57,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:58,325 INFO L124 PetriNetUnfolderBase]: 2723/4261 cut-off events. [2024-06-14 12:40:58,325 INFO L125 PetriNetUnfolderBase]: For 464580/464584 co-relation queries the response was YES. [2024-06-14 12:40:58,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37426 conditions, 4261 events. 2723/4261 cut-off events. For 464580/464584 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23560 event pairs, 568 based on Foata normal form. 6/4266 useless extension candidates. Maximal degree in co-relation 37306. Up to 4083 conditions per place. [2024-06-14 12:40:58,374 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 21 changer transitions 0/390 dead transitions. [2024-06-14 12:40:58,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 390 transitions, 5112 flow [2024-06-14 12:40:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 12:40:58,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:40:58,375 INFO L175 Difference]: Start difference. First operand has 257 places, 368 transitions, 4192 flow. Second operand 9 states and 135 transitions. [2024-06-14 12:40:58,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 390 transitions, 5112 flow [2024-06-14 12:40:59,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 390 transitions, 4908 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:40:59,267 INFO L231 Difference]: Finished difference. Result has 260 places, 370 transitions, 4125 flow [2024-06-14 12:40:59,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4125, PETRI_PLACES=260, PETRI_TRANSITIONS=370} [2024-06-14 12:40:59,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-14 12:40:59,268 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 370 transitions, 4125 flow [2024-06-14 12:40:59,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:40:59,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:59,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:59,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:40:59,269 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:59,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1820053963, now seen corresponding path program 3 times [2024-06-14 12:40:59,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:59,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392497793] [2024-06-14 12:40:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:00,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392497793] [2024-06-14 12:41:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392497793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:00,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:00,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:00,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107170445] [2024-06-14 12:41:00,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:00,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:00,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:00,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:00,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 370 transitions, 4125 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:41:00,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:00,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:00,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:01,205 INFO L124 PetriNetUnfolderBase]: 2751/4296 cut-off events. [2024-06-14 12:41:01,206 INFO L125 PetriNetUnfolderBase]: For 483939/483947 co-relation queries the response was YES. [2024-06-14 12:41:01,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38050 conditions, 4296 events. 2751/4296 cut-off events. For 483939/483947 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23742 event pairs, 564 based on Foata normal form. 6/4300 useless extension candidates. Maximal degree in co-relation 37929. Up to 3864 conditions per place. [2024-06-14 12:41:01,257 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 314 selfloop transitions, 83 changer transitions 0/401 dead transitions. [2024-06-14 12:41:01,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 401 transitions, 5543 flow [2024-06-14 12:41:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:41:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:41:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 12:41:01,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:41:01,258 INFO L175 Difference]: Start difference. First operand has 260 places, 370 transitions, 4125 flow. Second operand 10 states and 160 transitions. [2024-06-14 12:41:01,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 401 transitions, 5543 flow [2024-06-14 12:41:02,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 401 transitions, 5379 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 12:41:02,088 INFO L231 Difference]: Finished difference. Result has 263 places, 380 transitions, 4418 flow [2024-06-14 12:41:02,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4418, PETRI_PLACES=263, PETRI_TRANSITIONS=380} [2024-06-14 12:41:02,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 12:41:02,089 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 380 transitions, 4418 flow [2024-06-14 12:41:02,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:41:02,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:02,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:02,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:41:02,089 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:02,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2025448019, now seen corresponding path program 4 times [2024-06-14 12:41:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:02,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992487086] [2024-06-14 12:41:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:02,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:02,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992487086] [2024-06-14 12:41:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992487086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:02,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:02,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802721673] [2024-06-14 12:41:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:03,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:03,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 380 transitions, 4418 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:03,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:03,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:03,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:03,830 INFO L124 PetriNetUnfolderBase]: 2754/4299 cut-off events. [2024-06-14 12:41:03,830 INFO L125 PetriNetUnfolderBase]: For 499226/499234 co-relation queries the response was YES. [2024-06-14 12:41:03,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38609 conditions, 4299 events. 2754/4299 cut-off events. For 499226/499234 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 23725 event pairs, 578 based on Foata normal form. 8/4296 useless extension candidates. Maximal degree in co-relation 38486. Up to 3931 conditions per place. [2024-06-14 12:41:03,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 327 selfloop transitions, 65 changer transitions 0/396 dead transitions. [2024-06-14 12:41:03,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 396 transitions, 5352 flow [2024-06-14 12:41:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:41:03,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 12:41:03,884 INFO L175 Difference]: Start difference. First operand has 263 places, 380 transitions, 4418 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:41:03,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 396 transitions, 5352 flow [2024-06-14 12:41:04,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 396 transitions, 5103 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:04,902 INFO L231 Difference]: Finished difference. Result has 265 places, 383 transitions, 4423 flow [2024-06-14 12:41:04,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4169, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4423, PETRI_PLACES=265, PETRI_TRANSITIONS=383} [2024-06-14 12:41:04,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 12:41:04,903 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 383 transitions, 4423 flow [2024-06-14 12:41:04,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:04,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:04,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:04,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:41:04,904 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)] === [2024-06-14 12:41:04,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 56185739, now seen corresponding path program 4 times [2024-06-14 12:41:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:04,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76390755] [2024-06-14 12:41:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:05,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76390755] [2024-06-14 12:41:05,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76390755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:05,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:05,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:05,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164361297] [2024-06-14 12:41:05,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:05,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:05,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:05,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:05,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 383 transitions, 4423 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:05,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:05,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:05,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:06,692 INFO L124 PetriNetUnfolderBase]: 2764/4296 cut-off events. [2024-06-14 12:41:06,692 INFO L125 PetriNetUnfolderBase]: For 503278/503280 co-relation queries the response was YES. [2024-06-14 12:41:06,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38959 conditions, 4296 events. 2764/4296 cut-off events. For 503278/503280 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23655 event pairs, 551 based on Foata normal form. 2/4287 useless extension candidates. Maximal degree in co-relation 38834. Up to 3727 conditions per place. [2024-06-14 12:41:06,743 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 320 selfloop transitions, 94 changer transitions 0/418 dead transitions. [2024-06-14 12:41:06,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 418 transitions, 5481 flow [2024-06-14 12:41:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:41:06,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:41:06,744 INFO L175 Difference]: Start difference. First operand has 265 places, 383 transitions, 4423 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:41:06,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 418 transitions, 5481 flow [2024-06-14 12:41:07,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 418 transitions, 5249 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:07,797 INFO L231 Difference]: Finished difference. Result has 269 places, 394 transitions, 4565 flow [2024-06-14 12:41:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4191, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4565, PETRI_PLACES=269, PETRI_TRANSITIONS=394} [2024-06-14 12:41:07,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 12:41:07,798 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 394 transitions, 4565 flow [2024-06-14 12:41:07,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:07,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:07,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:41:07,799 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)] === [2024-06-14 12:41:07,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash 662271793, now seen corresponding path program 5 times [2024-06-14 12:41:07,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:07,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441273728] [2024-06-14 12:41:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:08,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:08,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441273728] [2024-06-14 12:41:08,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441273728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:08,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:08,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843622405] [2024-06-14 12:41:08,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:08,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:08,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:08,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:08,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:08,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 394 transitions, 4565 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:08,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:08,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:09,507 INFO L124 PetriNetUnfolderBase]: 2774/4306 cut-off events. [2024-06-14 12:41:09,507 INFO L125 PetriNetUnfolderBase]: For 516490/516492 co-relation queries the response was YES. [2024-06-14 12:41:09,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39956 conditions, 4306 events. 2774/4306 cut-off events. For 516490/516492 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23639 event pairs, 568 based on Foata normal form. 2/4298 useless extension candidates. Maximal degree in co-relation 39828. Up to 3741 conditions per place. [2024-06-14 12:41:09,560 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 326 selfloop transitions, 90 changer transitions 0/420 dead transitions. [2024-06-14 12:41:09,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 420 transitions, 5569 flow [2024-06-14 12:41:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:41:09,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:41:09,561 INFO L175 Difference]: Start difference. First operand has 269 places, 394 transitions, 4565 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:41:09,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 420 transitions, 5569 flow [2024-06-14 12:41:10,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 420 transitions, 5389 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:10,606 INFO L231 Difference]: Finished difference. Result has 274 places, 397 transitions, 4660 flow [2024-06-14 12:41:10,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4660, PETRI_PLACES=274, PETRI_TRANSITIONS=397} [2024-06-14 12:41:10,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-14 12:41:10,616 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 397 transitions, 4660 flow [2024-06-14 12:41:10,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:10,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:10,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:10,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:41:10,616 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)] === [2024-06-14 12:41:10,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:10,617 INFO L85 PathProgramCache]: Analyzing trace with hash 869713895, now seen corresponding path program 4 times [2024-06-14 12:41:10,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:10,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743142004] [2024-06-14 12:41:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743142004] [2024-06-14 12:41:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743142004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:11,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:11,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212934348] [2024-06-14 12:41:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:11,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:11,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:11,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 397 transitions, 4660 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:11,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:11,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:11,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:12,337 INFO L124 PetriNetUnfolderBase]: 2769/4315 cut-off events. [2024-06-14 12:41:12,338 INFO L125 PetriNetUnfolderBase]: For 521794/521796 co-relation queries the response was YES. [2024-06-14 12:41:12,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40009 conditions, 4315 events. 2769/4315 cut-off events. For 521794/521796 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23798 event pairs, 553 based on Foata normal form. 1/4309 useless extension candidates. Maximal degree in co-relation 39880. Up to 4042 conditions per place. [2024-06-14 12:41:12,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 38 changer transitions 0/416 dead transitions. [2024-06-14 12:41:12,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 416 transitions, 5548 flow [2024-06-14 12:41:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:41:12,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:41:12,392 INFO L175 Difference]: Start difference. First operand has 274 places, 397 transitions, 4660 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:41:12,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 416 transitions, 5548 flow [2024-06-14 12:41:13,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 416 transitions, 5250 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:13,482 INFO L231 Difference]: Finished difference. Result has 275 places, 397 transitions, 4444 flow [2024-06-14 12:41:13,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4444, PETRI_PLACES=275, PETRI_TRANSITIONS=397} [2024-06-14 12:41:13,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 12:41:13,483 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 397 transitions, 4444 flow [2024-06-14 12:41:13,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:13,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:13,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:13,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:41:13,484 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)] === [2024-06-14 12:41:13,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash -871226545, now seen corresponding path program 6 times [2024-06-14 12:41:13,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:13,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622431827] [2024-06-14 12:41:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:13,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:14,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622431827] [2024-06-14 12:41:14,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622431827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:14,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:14,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378814352] [2024-06-14 12:41:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:14,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:14,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:14,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:14,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:14,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 397 transitions, 4444 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:14,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:14,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:14,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:15,137 INFO L124 PetriNetUnfolderBase]: 2771/4306 cut-off events. [2024-06-14 12:41:15,138 INFO L125 PetriNetUnfolderBase]: For 530887/530889 co-relation queries the response was YES. [2024-06-14 12:41:15,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39154 conditions, 4306 events. 2771/4306 cut-off events. For 530887/530889 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23653 event pairs, 568 based on Foata normal form. 2/4297 useless extension candidates. Maximal degree in co-relation 39026. Up to 3708 conditions per place. [2024-06-14 12:41:15,195 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 100 changer transitions 0/425 dead transitions. [2024-06-14 12:41:15,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 425 transitions, 5708 flow [2024-06-14 12:41:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:41:15,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:41:15,198 INFO L175 Difference]: Start difference. First operand has 275 places, 397 transitions, 4444 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:41:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 425 transitions, 5708 flow [2024-06-14 12:41:16,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 425 transitions, 5473 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 12:41:16,135 INFO L231 Difference]: Finished difference. Result has 273 places, 403 transitions, 4597 flow [2024-06-14 12:41:16,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4209, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4597, PETRI_PLACES=273, PETRI_TRANSITIONS=403} [2024-06-14 12:41:16,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 12:41:16,136 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 403 transitions, 4597 flow [2024-06-14 12:41:16,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:16,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:16,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:16,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:41:16,137 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:16,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash -864762115, now seen corresponding path program 7 times [2024-06-14 12:41:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:16,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708161823] [2024-06-14 12:41:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:16,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:16,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708161823] [2024-06-14 12:41:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708161823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:16,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:16,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:16,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110852875] [2024-06-14 12:41:16,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:16,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:16,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:16,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 403 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:16,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:16,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:16,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:17,929 INFO L124 PetriNetUnfolderBase]: 2781/4315 cut-off events. [2024-06-14 12:41:17,930 INFO L125 PetriNetUnfolderBase]: For 545787/545789 co-relation queries the response was YES. [2024-06-14 12:41:17,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39715 conditions, 4315 events. 2781/4315 cut-off events. For 545787/545789 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23663 event pairs, 556 based on Foata normal form. 2/4307 useless extension candidates. Maximal degree in co-relation 39586. Up to 3709 conditions per place. [2024-06-14 12:41:17,975 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 106 changer transitions 0/429 dead transitions. [2024-06-14 12:41:17,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 429 transitions, 5622 flow [2024-06-14 12:41:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:41:17,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:41:17,976 INFO L175 Difference]: Start difference. First operand has 273 places, 403 transitions, 4597 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:41:17,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 429 transitions, 5622 flow [2024-06-14 12:41:18,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 429 transitions, 5419 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:18,777 INFO L231 Difference]: Finished difference. Result has 278 places, 407 transitions, 4736 flow [2024-06-14 12:41:18,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4736, PETRI_PLACES=278, PETRI_TRANSITIONS=407} [2024-06-14 12:41:18,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 12:41:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 407 transitions, 4736 flow [2024-06-14 12:41:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:18,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:18,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:18,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:41:18,779 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -516956995, now seen corresponding path program 8 times [2024-06-14 12:41:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614921482] [2024-06-14 12:41:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:19,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614921482] [2024-06-14 12:41:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614921482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:19,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:19,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:19,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971677196] [2024-06-14 12:41:19,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:19,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:19,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:19,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:19,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 407 transitions, 4736 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:19,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:19,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:19,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:20,420 INFO L124 PetriNetUnfolderBase]: 2815/4366 cut-off events. [2024-06-14 12:41:20,420 INFO L125 PetriNetUnfolderBase]: For 571990/571992 co-relation queries the response was YES. [2024-06-14 12:41:20,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41349 conditions, 4366 events. 2815/4366 cut-off events. For 571990/571992 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23954 event pairs, 562 based on Foata normal form. 2/4356 useless extension candidates. Maximal degree in co-relation 41217. Up to 3657 conditions per place. [2024-06-14 12:41:20,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 298 selfloop transitions, 137 changer transitions 0/439 dead transitions. [2024-06-14 12:41:20,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 439 transitions, 6324 flow [2024-06-14 12:41:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:41:20,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:41:20,479 INFO L175 Difference]: Start difference. First operand has 278 places, 407 transitions, 4736 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:41:20,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 439 transitions, 6324 flow [2024-06-14 12:41:21,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 439 transitions, 6053 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:41:21,663 INFO L231 Difference]: Finished difference. Result has 281 places, 418 transitions, 5053 flow [2024-06-14 12:41:21,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5053, PETRI_PLACES=281, PETRI_TRANSITIONS=418} [2024-06-14 12:41:21,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 12:41:21,664 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 418 transitions, 5053 flow [2024-06-14 12:41:21,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:21,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:21,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:21,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:41:21,664 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:21,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:21,665 INFO L85 PathProgramCache]: Analyzing trace with hash -516547609, now seen corresponding path program 5 times [2024-06-14 12:41:21,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:21,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244928340] [2024-06-14 12:41:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:21,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244928340] [2024-06-14 12:41:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244928340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:22,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:22,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:22,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764646280] [2024-06-14 12:41:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:22,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:22,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:22,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:22,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:22,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 418 transitions, 5053 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:22,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:22,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:22,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:23,291 INFO L124 PetriNetUnfolderBase]: 2820/4389 cut-off events. [2024-06-14 12:41:23,292 INFO L125 PetriNetUnfolderBase]: For 584405/584407 co-relation queries the response was YES. [2024-06-14 12:41:23,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41787 conditions, 4389 events. 2820/4389 cut-off events. For 584405/584407 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24232 event pairs, 601 based on Foata normal form. 1/4389 useless extension candidates. Maximal degree in co-relation 41654. Up to 4238 conditions per place. [2024-06-14 12:41:23,348 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 17 changer transitions 0/435 dead transitions. [2024-06-14 12:41:23,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 435 transitions, 6020 flow [2024-06-14 12:41:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 12:41:23,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 12:41:23,349 INFO L175 Difference]: Start difference. First operand has 281 places, 418 transitions, 5053 flow. Second operand 8 states and 120 transitions. [2024-06-14 12:41:23,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 435 transitions, 6020 flow [2024-06-14 12:41:24,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 435 transitions, 5797 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:24,318 INFO L231 Difference]: Finished difference. Result has 286 places, 421 transitions, 4941 flow [2024-06-14 12:41:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4941, PETRI_PLACES=286, PETRI_TRANSITIONS=421} [2024-06-14 12:41:24,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 12:41:24,319 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 421 transitions, 4941 flow [2024-06-14 12:41:24,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:24,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:24,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:24,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:41:24,321 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:24,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash -516963505, now seen corresponding path program 9 times [2024-06-14 12:41:24,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:24,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050416153] [2024-06-14 12:41:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:25,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:25,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050416153] [2024-06-14 12:41:25,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050416153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:25,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:25,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:25,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958593539] [2024-06-14 12:41:25,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:25,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:25,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:25,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:25,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:25,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 421 transitions, 4941 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:25,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:25,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:26,020 INFO L124 PetriNetUnfolderBase]: 2814/4366 cut-off events. [2024-06-14 12:41:26,020 INFO L125 PetriNetUnfolderBase]: For 588807/588809 co-relation queries the response was YES. [2024-06-14 12:41:26,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41385 conditions, 4366 events. 2814/4366 cut-off events. For 588807/588809 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 23975 event pairs, 561 based on Foata normal form. 2/4357 useless extension candidates. Maximal degree in co-relation 41250. Up to 3659 conditions per place. [2024-06-14 12:41:26,074 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 137 changer transitions 0/442 dead transitions. [2024-06-14 12:41:26,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 442 transitions, 6243 flow [2024-06-14 12:41:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:41:26,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:41:26,075 INFO L175 Difference]: Start difference. First operand has 286 places, 421 transitions, 4941 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:41:26,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 442 transitions, 6243 flow [2024-06-14 12:41:27,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 442 transitions, 6113 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:27,349 INFO L231 Difference]: Finished difference. Result has 288 places, 421 transitions, 5091 flow [2024-06-14 12:41:27,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5091, PETRI_PLACES=288, PETRI_TRANSITIONS=421} [2024-06-14 12:41:27,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-14 12:41:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 421 transitions, 5091 flow [2024-06-14 12:41:27,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:27,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:27,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:27,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:41:27,350 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:27,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash -516963319, now seen corresponding path program 6 times [2024-06-14 12:41:27,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:27,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154888546] [2024-06-14 12:41:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:27,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:28,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154888546] [2024-06-14 12:41:28,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154888546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:28,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:28,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221192775] [2024-06-14 12:41:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:28,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:28,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 421 transitions, 5091 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:28,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:28,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:28,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:28,958 INFO L124 PetriNetUnfolderBase]: 2819/4375 cut-off events. [2024-06-14 12:41:28,959 INFO L125 PetriNetUnfolderBase]: For 598410/598412 co-relation queries the response was YES. [2024-06-14 12:41:28,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42008 conditions, 4375 events. 2819/4375 cut-off events. For 598410/598412 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24046 event pairs, 566 based on Foata normal form. 1/4369 useless extension candidates. Maximal degree in co-relation 41872. Up to 4077 conditions per place. [2024-06-14 12:41:29,018 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 57 changer transitions 0/440 dead transitions. [2024-06-14 12:41:29,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 440 transitions, 6080 flow [2024-06-14 12:41:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:41:29,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 12:41:29,020 INFO L175 Difference]: Start difference. First operand has 288 places, 421 transitions, 5091 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:41:29,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 440 transitions, 6080 flow [2024-06-14 12:41:30,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 440 transitions, 5854 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:30,084 INFO L231 Difference]: Finished difference. Result has 292 places, 424 transitions, 5056 flow [2024-06-14 12:41:30,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5056, PETRI_PLACES=292, PETRI_TRANSITIONS=424} [2024-06-14 12:41:30,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 12:41:30,085 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 424 transitions, 5056 flow [2024-06-14 12:41:30,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:30,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:30,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:30,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:41:30,086 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:30,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2092027475, now seen corresponding path program 10 times [2024-06-14 12:41:30,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:30,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374718634] [2024-06-14 12:41:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:30,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:30,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374718634] [2024-06-14 12:41:30,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374718634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:30,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:30,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:30,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994917414] [2024-06-14 12:41:30,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:30,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:30,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 424 transitions, 5056 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:30,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:30,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:30,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:32,002 INFO L124 PetriNetUnfolderBase]: 2845/4426 cut-off events. [2024-06-14 12:41:32,002 INFO L125 PetriNetUnfolderBase]: For 624943/624948 co-relation queries the response was YES. [2024-06-14 12:41:32,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42463 conditions, 4426 events. 2845/4426 cut-off events. For 624943/624948 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24461 event pairs, 636 based on Foata normal form. 2/4415 useless extension candidates. Maximal degree in co-relation 42326. Up to 3489 conditions per place. [2024-06-14 12:41:32,088 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 153 changer transitions 0/451 dead transitions. [2024-06-14 12:41:32,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 451 transitions, 6670 flow [2024-06-14 12:41:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:41:32,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 12:41:32,090 INFO L175 Difference]: Start difference. First operand has 292 places, 424 transitions, 5056 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:41:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 451 transitions, 6670 flow [2024-06-14 12:41:33,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 451 transitions, 6514 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:33,921 INFO L231 Difference]: Finished difference. Result has 294 places, 434 transitions, 5522 flow [2024-06-14 12:41:33,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5522, PETRI_PLACES=294, PETRI_TRANSITIONS=434} [2024-06-14 12:41:33,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 12:41:33,921 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 434 transitions, 5522 flow [2024-06-14 12:41:33,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:33,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:33,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:33,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:41:33,922 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:33,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2076012799, now seen corresponding path program 7 times [2024-06-14 12:41:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:33,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833312917] [2024-06-14 12:41:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:33,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:34,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833312917] [2024-06-14 12:41:34,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833312917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:34,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:34,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:34,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709303496] [2024-06-14 12:41:34,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:34,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:34,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:34,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 434 transitions, 5522 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:34,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:34,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:34,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:35,941 INFO L124 PetriNetUnfolderBase]: 2850/4432 cut-off events. [2024-06-14 12:41:35,942 INFO L125 PetriNetUnfolderBase]: For 640537/640545 co-relation queries the response was YES. [2024-06-14 12:41:35,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43429 conditions, 4432 events. 2850/4432 cut-off events. For 640537/640545 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24517 event pairs, 601 based on Foata normal form. 5/4435 useless extension candidates. Maximal degree in co-relation 43291. Up to 4265 conditions per place. [2024-06-14 12:41:36,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 415 selfloop transitions, 29 changer transitions 0/448 dead transitions. [2024-06-14 12:41:36,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 448 transitions, 6511 flow [2024-06-14 12:41:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:41:36,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:41:36,009 INFO L175 Difference]: Start difference. First operand has 294 places, 434 transitions, 5522 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:41:36,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 448 transitions, 6511 flow [2024-06-14 12:41:37,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 448 transitions, 6251 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-06-14 12:41:37,583 INFO L231 Difference]: Finished difference. Result has 299 places, 437 transitions, 5403 flow [2024-06-14 12:41:37,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=299, PETRI_TRANSITIONS=437} [2024-06-14 12:41:37,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 12:41:37,584 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 437 transitions, 5403 flow [2024-06-14 12:41:37,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:37,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:37,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:37,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:41:37,584 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:37,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2092264439, now seen corresponding path program 8 times [2024-06-14 12:41:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:37,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10224385] [2024-06-14 12:41:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:37,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:38,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:38,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10224385] [2024-06-14 12:41:38,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10224385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:38,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:38,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106437610] [2024-06-14 12:41:38,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:38,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:38,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 437 transitions, 5403 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:38,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:38,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:38,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:39,622 INFO L124 PetriNetUnfolderBase]: 2863/4451 cut-off events. [2024-06-14 12:41:39,623 INFO L125 PetriNetUnfolderBase]: For 642527/642535 co-relation queries the response was YES. [2024-06-14 12:41:39,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42531 conditions, 4451 events. 2863/4451 cut-off events. For 642527/642535 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24603 event pairs, 582 based on Foata normal form. 5/4445 useless extension candidates. Maximal degree in co-relation 42391. Up to 3956 conditions per place. [2024-06-14 12:41:39,696 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 328 selfloop transitions, 125 changer transitions 0/457 dead transitions. [2024-06-14 12:41:39,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 457 transitions, 6865 flow [2024-06-14 12:41:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:41:39,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:41:39,697 INFO L175 Difference]: Start difference. First operand has 299 places, 437 transitions, 5403 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:41:39,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 457 transitions, 6865 flow [2024-06-14 12:41:41,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 457 transitions, 6753 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:41:41,155 INFO L231 Difference]: Finished difference. Result has 301 places, 443 transitions, 5695 flow [2024-06-14 12:41:41,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5695, PETRI_PLACES=301, PETRI_TRANSITIONS=443} [2024-06-14 12:41:41,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 12:41:41,156 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 443 transitions, 5695 flow [2024-06-14 12:41:41,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:41,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:41,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:41:41,156 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)] === [2024-06-14 12:41:41,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash 616546221, now seen corresponding path program 9 times [2024-06-14 12:41:41,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:41,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568310269] [2024-06-14 12:41:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:42,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:42,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568310269] [2024-06-14 12:41:42,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568310269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:42,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:42,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:42,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202922944] [2024-06-14 12:41:42,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:42,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:42,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:42,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:42,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 443 transitions, 5695 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:42,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:42,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:42,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:43,220 INFO L124 PetriNetUnfolderBase]: 2860/4444 cut-off events. [2024-06-14 12:41:43,221 INFO L125 PetriNetUnfolderBase]: For 653104/653112 co-relation queries the response was YES. [2024-06-14 12:41:43,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42812 conditions, 4444 events. 2860/4444 cut-off events. For 653104/653112 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24537 event pairs, 594 based on Foata normal form. 5/4447 useless extension candidates. Maximal degree in co-relation 42671. Up to 4249 conditions per place. [2024-06-14 12:41:43,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 409 selfloop transitions, 44 changer transitions 0/457 dead transitions. [2024-06-14 12:41:43,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 457 transitions, 6823 flow [2024-06-14 12:41:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:41:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:41:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-14 12:41:43,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36097560975609755 [2024-06-14 12:41:43,311 INFO L175 Difference]: Start difference. First operand has 301 places, 443 transitions, 5695 flow. Second operand 10 states and 148 transitions. [2024-06-14 12:41:43,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 457 transitions, 6823 flow [2024-06-14 12:41:44,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 457 transitions, 6523 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:44,785 INFO L231 Difference]: Finished difference. Result has 307 places, 443 transitions, 5489 flow [2024-06-14 12:41:44,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5395, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5489, PETRI_PLACES=307, PETRI_TRANSITIONS=443} [2024-06-14 12:41:44,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 12:41:44,786 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 443 transitions, 5489 flow [2024-06-14 12:41:44,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:44,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:44,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:44,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:41:44,786 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)] === [2024-06-14 12:41:44,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 609874215, now seen corresponding path program 11 times [2024-06-14 12:41:44,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:44,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229902863] [2024-06-14 12:41:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:44,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:45,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:45,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229902863] [2024-06-14 12:41:45,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229902863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:45,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548457393] [2024-06-14 12:41:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:45,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:45,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 443 transitions, 5489 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:45,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:45,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:46,404 INFO L124 PetriNetUnfolderBase]: 2870/4461 cut-off events. [2024-06-14 12:41:46,404 INFO L125 PetriNetUnfolderBase]: For 670432/670437 co-relation queries the response was YES. [2024-06-14 12:41:46,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42758 conditions, 4461 events. 2870/4461 cut-off events. For 670432/670437 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24654 event pairs, 636 based on Foata normal form. 2/4450 useless extension candidates. Maximal degree in co-relation 42616. Up to 3516 conditions per place. [2024-06-14 12:41:46,466 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 154 changer transitions 0/464 dead transitions. [2024-06-14 12:41:46,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 464 transitions, 6923 flow [2024-06-14 12:41:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:41:46,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:41:46,468 INFO L175 Difference]: Start difference. First operand has 307 places, 443 transitions, 5489 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:41:46,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 464 transitions, 6923 flow [2024-06-14 12:41:47,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 464 transitions, 6797 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 12:41:47,954 INFO L231 Difference]: Finished difference. Result has 306 places, 446 transitions, 5751 flow [2024-06-14 12:41:47,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5751, PETRI_PLACES=306, PETRI_TRANSITIONS=446} [2024-06-14 12:41:47,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 12:41:47,955 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 446 transitions, 5751 flow [2024-06-14 12:41:47,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:47,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:47,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:41:47,956 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)] === [2024-06-14 12:41:47,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:47,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1869661499, now seen corresponding path program 10 times [2024-06-14 12:41:47,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:47,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243753855] [2024-06-14 12:41:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243753855] [2024-06-14 12:41:48,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243753855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:48,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:48,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023978356] [2024-06-14 12:41:48,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:48,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:48,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:48,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:48,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:48,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 446 transitions, 5751 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:48,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:48,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:48,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:49,663 INFO L124 PetriNetUnfolderBase]: 2862/4448 cut-off events. [2024-06-14 12:41:49,663 INFO L125 PetriNetUnfolderBase]: For 677255/677263 co-relation queries the response was YES. [2024-06-14 12:41:49,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43115 conditions, 4448 events. 2862/4448 cut-off events. For 677255/677263 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24604 event pairs, 603 based on Foata normal form. 6/4452 useless extension candidates. Maximal degree in co-relation 42972. Up to 4255 conditions per place. [2024-06-14 12:41:49,736 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 411 selfloop transitions, 42 changer transitions 0/457 dead transitions. [2024-06-14 12:41:49,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 457 transitions, 6687 flow [2024-06-14 12:41:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:41:49,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:41:49,738 INFO L175 Difference]: Start difference. First operand has 306 places, 446 transitions, 5751 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:41:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 457 transitions, 6687 flow [2024-06-14 12:41:51,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 457 transitions, 6388 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:51,277 INFO L231 Difference]: Finished difference. Result has 310 places, 446 transitions, 5544 flow [2024-06-14 12:41:51,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5544, PETRI_PLACES=310, PETRI_TRANSITIONS=446} [2024-06-14 12:41:51,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 12:41:51,278 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 446 transitions, 5544 flow [2024-06-14 12:41:51,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:51,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:51,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:41:51,279 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:51,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash 432980031, now seen corresponding path program 11 times [2024-06-14 12:41:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:51,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754486008] [2024-06-14 12:41:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:52,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:52,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754486008] [2024-06-14 12:41:52,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754486008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:52,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:52,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:52,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777190234] [2024-06-14 12:41:52,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:52,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:52,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:52,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:52,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 446 transitions, 5544 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:52,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:52,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:52,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:53,360 INFO L124 PetriNetUnfolderBase]: 2872/4463 cut-off events. [2024-06-14 12:41:53,361 INFO L125 PetriNetUnfolderBase]: For 687661/687669 co-relation queries the response was YES. [2024-06-14 12:41:53,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42832 conditions, 4463 events. 2872/4463 cut-off events. For 687661/687669 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24656 event pairs, 580 based on Foata normal form. 6/4458 useless extension candidates. Maximal degree in co-relation 42688. Up to 3970 conditions per place. [2024-06-14 12:41:53,420 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 114 changer transitions 0/463 dead transitions. [2024-06-14 12:41:53,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 463 transitions, 6773 flow [2024-06-14 12:41:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:41:53,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:41:53,436 INFO L175 Difference]: Start difference. First operand has 310 places, 446 transitions, 5544 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:41:53,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 463 transitions, 6773 flow [2024-06-14 12:41:55,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 463 transitions, 6689 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:55,663 INFO L231 Difference]: Finished difference. Result has 311 places, 450 transitions, 5780 flow [2024-06-14 12:41:55,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5780, PETRI_PLACES=311, PETRI_TRANSITIONS=450} [2024-06-14 12:41:55,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 12:41:55,664 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 450 transitions, 5780 flow [2024-06-14 12:41:55,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:55,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:55,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:41:55,665 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:55,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2025571151, now seen corresponding path program 12 times [2024-06-14 12:41:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91984703] [2024-06-14 12:41:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:56,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:56,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91984703] [2024-06-14 12:41:56,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91984703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:56,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:56,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184974774] [2024-06-14 12:41:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:56,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:56,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:41:56,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 450 transitions, 5780 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:56,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:56,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:41:56,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:57,281 INFO L124 PetriNetUnfolderBase]: 2860/4443 cut-off events. [2024-06-14 12:41:57,282 INFO L125 PetriNetUnfolderBase]: For 693883/693888 co-relation queries the response was YES. [2024-06-14 12:41:57,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42733 conditions, 4443 events. 2860/4443 cut-off events. For 693883/693888 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24497 event pairs, 628 based on Foata normal form. 4/4434 useless extension candidates. Maximal degree in co-relation 42588. Up to 3511 conditions per place. [2024-06-14 12:41:57,346 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 313 selfloop transitions, 150 changer transitions 0/467 dead transitions. [2024-06-14 12:41:57,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 467 transitions, 7152 flow [2024-06-14 12:41:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:41:57,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:41:57,348 INFO L175 Difference]: Start difference. First operand has 311 places, 450 transitions, 5780 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:41:57,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 467 transitions, 7152 flow [2024-06-14 12:41:59,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 467 transitions, 6842 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 12:41:59,365 INFO L231 Difference]: Finished difference. Result has 314 places, 450 transitions, 5777 flow [2024-06-14 12:41:59,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5777, PETRI_PLACES=314, PETRI_TRANSITIONS=450} [2024-06-14 12:41:59,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-14 12:41:59,366 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 450 transitions, 5777 flow [2024-06-14 12:41:59,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:59,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:59,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:59,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:41:59,366 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:59,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2071359079, now seen corresponding path program 12 times [2024-06-14 12:41:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:59,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125927490] [2024-06-14 12:41:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:00,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:00,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125927490] [2024-06-14 12:42:00,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125927490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:00,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:00,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:00,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803522826] [2024-06-14 12:42:00,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:00,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:00,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:00,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:00,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 450 transitions, 5777 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:00,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:00,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:00,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:01,009 INFO L124 PetriNetUnfolderBase]: 2852/4433 cut-off events. [2024-06-14 12:42:01,009 INFO L125 PetriNetUnfolderBase]: For 687965/687973 co-relation queries the response was YES. [2024-06-14 12:42:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42626 conditions, 4433 events. 2852/4433 cut-off events. For 687965/687973 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24477 event pairs, 577 based on Foata normal form. 6/4428 useless extension candidates. Maximal degree in co-relation 42480. Up to 3946 conditions per place. [2024-06-14 12:42:01,071 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 117 changer transitions 0/462 dead transitions. [2024-06-14 12:42:01,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 462 transitions, 6729 flow [2024-06-14 12:42:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:42:01,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:42:01,072 INFO L175 Difference]: Start difference. First operand has 314 places, 450 transitions, 5777 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:42:01,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 462 transitions, 6729 flow [2024-06-14 12:42:03,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 462 transitions, 6291 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:03,078 INFO L231 Difference]: Finished difference. Result has 315 places, 450 transitions, 5580 flow [2024-06-14 12:42:03,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5339, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5580, PETRI_PLACES=315, PETRI_TRANSITIONS=450} [2024-06-14 12:42:03,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 12:42:03,079 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 450 transitions, 5580 flow [2024-06-14 12:42:03,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:03,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:03,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:03,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:42:03,080 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:03,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2083641217, now seen corresponding path program 2 times [2024-06-14 12:42:03,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:03,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578766696] [2024-06-14 12:42:03,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:04,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:04,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578766696] [2024-06-14 12:42:04,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578766696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:04,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:04,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:04,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276028376] [2024-06-14 12:42:04,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:04,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:04,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:04,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:04,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 450 transitions, 5580 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:04,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:05,126 INFO L124 PetriNetUnfolderBase]: 2873/4464 cut-off events. [2024-06-14 12:42:05,127 INFO L125 PetriNetUnfolderBase]: For 713880/713882 co-relation queries the response was YES. [2024-06-14 12:42:05,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42780 conditions, 4464 events. 2873/4464 cut-off events. For 713880/713882 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24632 event pairs, 596 based on Foata normal form. 2/4465 useless extension candidates. Maximal degree in co-relation 42635. Up to 4290 conditions per place. [2024-06-14 12:42:05,207 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 28 changer transitions 0/470 dead transitions. [2024-06-14 12:42:05,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 470 transitions, 6954 flow [2024-06-14 12:42:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:42:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:42:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-14 12:42:05,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35121951219512193 [2024-06-14 12:42:05,209 INFO L175 Difference]: Start difference. First operand has 315 places, 450 transitions, 5580 flow. Second operand 10 states and 144 transitions. [2024-06-14 12:42:05,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 470 transitions, 6954 flow [2024-06-14 12:42:07,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 470 transitions, 6575 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 12:42:07,147 INFO L231 Difference]: Finished difference. Result has 315 places, 454 transitions, 5470 flow [2024-06-14 12:42:07,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5470, PETRI_PLACES=315, PETRI_TRANSITIONS=454} [2024-06-14 12:42:07,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 12:42:07,148 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 454 transitions, 5470 flow [2024-06-14 12:42:07,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:07,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:07,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:42:07,149 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:07,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1869653005, now seen corresponding path program 4 times [2024-06-14 12:42:07,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:07,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824102825] [2024-06-14 12:42:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:08,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:08,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824102825] [2024-06-14 12:42:08,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824102825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:08,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:08,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:08,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524768839] [2024-06-14 12:42:08,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:08,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:08,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:08,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:08,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 454 transitions, 5470 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:08,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:08,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:08,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:09,484 INFO L124 PetriNetUnfolderBase]: 2987/4637 cut-off events. [2024-06-14 12:42:09,485 INFO L125 PetriNetUnfolderBase]: For 792277/792282 co-relation queries the response was YES. [2024-06-14 12:42:09,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45610 conditions, 4637 events. 2987/4637 cut-off events. For 792277/792282 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 25746 event pairs, 598 based on Foata normal form. 4/4638 useless extension candidates. Maximal degree in co-relation 45464. Up to 4231 conditions per place. [2024-06-14 12:42:09,540 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 409 selfloop transitions, 75 changer transitions 0/488 dead transitions. [2024-06-14 12:42:09,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 488 transitions, 7380 flow [2024-06-14 12:42:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:42:09,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 12:42:09,543 INFO L175 Difference]: Start difference. First operand has 315 places, 454 transitions, 5470 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:42:09,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 488 transitions, 7380 flow [2024-06-14 12:42:11,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 488 transitions, 7234 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:42:11,702 INFO L231 Difference]: Finished difference. Result has 320 places, 467 transitions, 5902 flow [2024-06-14 12:42:11,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5324, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5902, PETRI_PLACES=320, PETRI_TRANSITIONS=467} [2024-06-14 12:42:11,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 12:42:11,703 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 467 transitions, 5902 flow [2024-06-14 12:42:11,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:11,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:11,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:42:11,704 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:11,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2025458931, now seen corresponding path program 5 times [2024-06-14 12:42:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529955674] [2024-06-14 12:42:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:12,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:12,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529955674] [2024-06-14 12:42:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529955674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:12,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:12,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203121074] [2024-06-14 12:42:12,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:12,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:12,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:12,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 467 transitions, 5902 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:12,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:12,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:12,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:13,633 INFO L124 PetriNetUnfolderBase]: 3091/4790 cut-off events. [2024-06-14 12:42:13,633 INFO L125 PetriNetUnfolderBase]: For 866639/866644 co-relation queries the response was YES. [2024-06-14 12:42:13,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49146 conditions, 4790 events. 3091/4790 cut-off events. For 866639/866644 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26626 event pairs, 633 based on Foata normal form. 4/4781 useless extension candidates. Maximal degree in co-relation 48996. Up to 3396 conditions per place. [2024-06-14 12:42:13,699 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 288 selfloop transitions, 219 changer transitions 0/511 dead transitions. [2024-06-14 12:42:13,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 511 transitions, 8440 flow [2024-06-14 12:42:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:42:13,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:42:13,700 INFO L175 Difference]: Start difference. First operand has 320 places, 467 transitions, 5902 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:42:13,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 511 transitions, 8440 flow [2024-06-14 12:42:16,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 511 transitions, 8148 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-06-14 12:42:16,065 INFO L231 Difference]: Finished difference. Result has 326 places, 488 transitions, 6731 flow [2024-06-14 12:42:16,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5628, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6731, PETRI_PLACES=326, PETRI_TRANSITIONS=488} [2024-06-14 12:42:16,067 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 12:42:16,068 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 488 transitions, 6731 flow [2024-06-14 12:42:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:16,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:16,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:16,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:42:16,068 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:16,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2025804891, now seen corresponding path program 6 times [2024-06-14 12:42:16,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143672606] [2024-06-14 12:42:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:16,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:17,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:17,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143672606] [2024-06-14 12:42:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143672606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:17,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:17,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614924281] [2024-06-14 12:42:17,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:17,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:17,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:17,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:17,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 488 transitions, 6731 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:17,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:17,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:17,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:18,208 INFO L124 PetriNetUnfolderBase]: 3115/4823 cut-off events. [2024-06-14 12:42:18,209 INFO L125 PetriNetUnfolderBase]: For 885374/885379 co-relation queries the response was YES. [2024-06-14 12:42:18,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50638 conditions, 4823 events. 3115/4823 cut-off events. For 885374/885379 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26750 event pairs, 636 based on Foata normal form. 4/4814 useless extension candidates. Maximal degree in co-relation 50485. Up to 3430 conditions per place. [2024-06-14 12:42:18,278 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 302 selfloop transitions, 211 changer transitions 0/517 dead transitions. [2024-06-14 12:42:18,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 517 transitions, 8930 flow [2024-06-14 12:42:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:18,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:42:18,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:42:18,279 INFO L175 Difference]: Start difference. First operand has 326 places, 488 transitions, 6731 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:42:18,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 517 transitions, 8930 flow [2024-06-14 12:42:20,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 517 transitions, 8512 flow, removed 129 selfloop flow, removed 3 redundant places. [2024-06-14 12:42:20,623 INFO L231 Difference]: Finished difference. Result has 333 places, 494 transitions, 7022 flow [2024-06-14 12:42:20,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7022, PETRI_PLACES=333, PETRI_TRANSITIONS=494} [2024-06-14 12:42:20,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 12:42:20,624 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 494 transitions, 7022 flow [2024-06-14 12:42:20,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:20,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:20,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:42:20,625 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:20,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:20,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2025817415, now seen corresponding path program 3 times [2024-06-14 12:42:20,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45932308] [2024-06-14 12:42:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:20,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45932308] [2024-06-14 12:42:21,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45932308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:21,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:21,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777471269] [2024-06-14 12:42:21,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:21,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:21,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:21,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:21,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 494 transitions, 7022 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:21,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:21,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:21,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:22,758 INFO L124 PetriNetUnfolderBase]: 3110/4819 cut-off events. [2024-06-14 12:42:22,758 INFO L125 PetriNetUnfolderBase]: For 878786/878796 co-relation queries the response was YES. [2024-06-14 12:42:22,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50663 conditions, 4819 events. 3110/4819 cut-off events. For 878786/878796 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26785 event pairs, 577 based on Foata normal form. 10/4826 useless extension candidates. Maximal degree in co-relation 50508. Up to 4610 conditions per place. [2024-06-14 12:42:22,828 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 474 selfloop transitions, 33 changer transitions 0/511 dead transitions. [2024-06-14 12:42:22,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 511 transitions, 8196 flow [2024-06-14 12:42:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 12:42:22,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-14 12:42:22,830 INFO L175 Difference]: Start difference. First operand has 333 places, 494 transitions, 7022 flow. Second operand 9 states and 133 transitions. [2024-06-14 12:42:22,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 511 transitions, 8196 flow [2024-06-14 12:42:25,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 511 transitions, 7609 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-14 12:42:25,095 INFO L231 Difference]: Finished difference. Result has 336 places, 496 transitions, 6624 flow [2024-06-14 12:42:25,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6435, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6624, PETRI_PLACES=336, PETRI_TRANSITIONS=496} [2024-06-14 12:42:25,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-14 12:42:25,096 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 496 transitions, 6624 flow [2024-06-14 12:42:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:25,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:25,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:42:25,096 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:25,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 432988525, now seen corresponding path program 7 times [2024-06-14 12:42:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:25,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074304601] [2024-06-14 12:42:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074304601] [2024-06-14 12:42:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074304601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:25,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:25,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:25,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658654560] [2024-06-14 12:42:25,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:26,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:26,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:26,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:26,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:26,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:26,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 496 transitions, 6624 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:26,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:26,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:26,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:27,525 INFO L124 PetriNetUnfolderBase]: 3184/4931 cut-off events. [2024-06-14 12:42:27,525 INFO L125 PetriNetUnfolderBase]: For 934694/934699 co-relation queries the response was YES. [2024-06-14 12:42:27,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51796 conditions, 4931 events. 3184/4931 cut-off events. For 934694/934699 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27489 event pairs, 636 based on Foata normal form. 4/4922 useless extension candidates. Maximal degree in co-relation 51641. Up to 3438 conditions per place. [2024-06-14 12:42:27,632 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 306 selfloop transitions, 219 changer transitions 0/529 dead transitions. [2024-06-14 12:42:27,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 529 transitions, 8996 flow [2024-06-14 12:42:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:42:27,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 12:42:27,633 INFO L175 Difference]: Start difference. First operand has 336 places, 496 transitions, 6624 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:42:27,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 529 transitions, 8996 flow [2024-06-14 12:42:30,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 529 transitions, 8823 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:30,414 INFO L231 Difference]: Finished difference. Result has 339 places, 506 transitions, 7298 flow [2024-06-14 12:42:30,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7298, PETRI_PLACES=339, PETRI_TRANSITIONS=506} [2024-06-14 12:42:30,414 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 12:42:30,414 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 506 transitions, 7298 flow [2024-06-14 12:42:30,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:30,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:30,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:42:30,415 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:30,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1869665095, now seen corresponding path program 8 times [2024-06-14 12:42:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:30,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364933471] [2024-06-14 12:42:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:31,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364933471] [2024-06-14 12:42:31,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364933471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:31,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:31,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198236011] [2024-06-14 12:42:31,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:31,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:31,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 506 transitions, 7298 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:31,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:31,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:31,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:32,784 INFO L124 PetriNetUnfolderBase]: 3186/4930 cut-off events. [2024-06-14 12:42:32,784 INFO L125 PetriNetUnfolderBase]: For 945357/945365 co-relation queries the response was YES. [2024-06-14 12:42:32,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53095 conditions, 4930 events. 3186/4930 cut-off events. For 945357/945365 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27465 event pairs, 622 based on Foata normal form. 6/4934 useless extension candidates. Maximal degree in co-relation 52938. Up to 4702 conditions per place. [2024-06-14 12:42:32,856 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 469 selfloop transitions, 49 changer transitions 0/522 dead transitions. [2024-06-14 12:42:32,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 522 transitions, 8495 flow [2024-06-14 12:42:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 12:42:32,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-14 12:42:32,858 INFO L175 Difference]: Start difference. First operand has 339 places, 506 transitions, 7298 flow. Second operand 9 states and 136 transitions. [2024-06-14 12:42:32,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 522 transitions, 8495 flow [2024-06-14 12:42:35,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 522 transitions, 7987 flow, removed 123 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:35,679 INFO L231 Difference]: Finished difference. Result has 343 places, 510 transitions, 7032 flow [2024-06-14 12:42:35,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7032, PETRI_PLACES=343, PETRI_TRANSITIONS=510} [2024-06-14 12:42:35,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 12:42:35,679 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 510 transitions, 7032 flow [2024-06-14 12:42:35,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:35,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:35,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:35,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:42:35,680 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:35,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash 846295839, now seen corresponding path program 4 times [2024-06-14 12:42:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:35,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241488466] [2024-06-14 12:42:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:36,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241488466] [2024-06-14 12:42:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241488466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:36,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871457948] [2024-06-14 12:42:36,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:36,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:36,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 510 transitions, 7032 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:36,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:36,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:36,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:37,843 INFO L124 PetriNetUnfolderBase]: 3181/4922 cut-off events. [2024-06-14 12:42:37,843 INFO L125 PetriNetUnfolderBase]: For 939533/939535 co-relation queries the response was YES. [2024-06-14 12:42:37,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52214 conditions, 4922 events. 3181/4922 cut-off events. For 939533/939535 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27416 event pairs, 617 based on Foata normal form. 2/4923 useless extension candidates. Maximal degree in co-relation 52055. Up to 4735 conditions per place. [2024-06-14 12:42:37,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 495 selfloop transitions, 25 changer transitions 0/524 dead transitions. [2024-06-14 12:42:37,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 524 transitions, 8108 flow [2024-06-14 12:42:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:42:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:42:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-14 12:42:37,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439024390243902 [2024-06-14 12:42:37,918 INFO L175 Difference]: Start difference. First operand has 343 places, 510 transitions, 7032 flow. Second operand 10 states and 141 transitions. [2024-06-14 12:42:37,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 524 transitions, 8108 flow [2024-06-14 12:42:40,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 524 transitions, 7827 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:40,764 INFO L231 Difference]: Finished difference. Result has 346 places, 510 transitions, 6807 flow [2024-06-14 12:42:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6751, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6807, PETRI_PLACES=346, PETRI_TRANSITIONS=510} [2024-06-14 12:42:40,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 12:42:40,765 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 510 transitions, 6807 flow [2024-06-14 12:42:40,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:40,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:40,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:42:40,765 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:40,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1855843435, now seen corresponding path program 9 times [2024-06-14 12:42:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:40,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120200824] [2024-06-14 12:42:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:41,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:41,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120200824] [2024-06-14 12:42:41,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120200824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:41,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:41,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:41,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798282905] [2024-06-14 12:42:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:41,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:41,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:42:41,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 510 transitions, 6807 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:41,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:41,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:42:41,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:42,977 INFO L124 PetriNetUnfolderBase]: 3215/4979 cut-off events. [2024-06-14 12:42:42,977 INFO L125 PetriNetUnfolderBase]: For 975175/975180 co-relation queries the response was YES. [2024-06-14 12:42:43,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52817 conditions, 4979 events. 3215/4979 cut-off events. For 975175/975180 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27840 event pairs, 607 based on Foata normal form. 4/4980 useless extension candidates. Maximal degree in co-relation 52657. Up to 4426 conditions per place. [2024-06-14 12:42:43,053 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 427 selfloop transitions, 111 changer transitions 0/542 dead transitions. [2024-06-14 12:42:43,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 542 transitions, 8985 flow [2024-06-14 12:42:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:42:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:42:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 12:42:43,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-14 12:42:43,055 INFO L175 Difference]: Start difference. First operand has 346 places, 510 transitions, 6807 flow. Second operand 10 states and 169 transitions. [2024-06-14 12:42:43,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 542 transitions, 8985 flow [2024-06-14 12:42:46,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 542 transitions, 8924 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 12:42:46,659 INFO L231 Difference]: Finished difference. Result has 348 places, 520 transitions, 7388 flow [2024-06-14 12:42:46,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6746, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7388, PETRI_PLACES=348, PETRI_TRANSITIONS=520} [2024-06-14 12:42:46,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 12:42:46,660 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 520 transitions, 7388 flow [2024-06-14 12:42:46,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:42:46,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:46,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:46,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:42:46,661 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:46,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1333112701, now seen corresponding path program 1 times [2024-06-14 12:42:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:46,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661875494] [2024-06-14 12:42:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:46,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:47,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:47,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661875494] [2024-06-14 12:42:47,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661875494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:47,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:47,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:47,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809418873] [2024-06-14 12:42:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:47,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:42:47,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 520 transitions, 7388 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) [2024-06-14 12:42:47,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:47,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:42:47,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:49,073 INFO L124 PetriNetUnfolderBase]: 3108/4876 cut-off events. [2024-06-14 12:42:49,073 INFO L125 PetriNetUnfolderBase]: For 1021049/1021057 co-relation queries the response was YES. [2024-06-14 12:42:49,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53802 conditions, 4876 events. 3108/4876 cut-off events. For 1021049/1021057 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27865 event pairs, 551 based on Foata normal form. 4/4865 useless extension candidates. Maximal degree in co-relation 53640. Up to 4469 conditions per place. [2024-06-14 12:42:49,149 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 482 selfloop transitions, 17 changer transitions 0/544 dead transitions. [2024-06-14 12:42:49,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 544 transitions, 8498 flow [2024-06-14 12:42:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:42:49,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 12:42:49,151 INFO L175 Difference]: Start difference. First operand has 348 places, 520 transitions, 7388 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:42:49,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 544 transitions, 8498 flow [2024-06-14 12:42:52,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 544 transitions, 8045 flow, removed 135 selfloop flow, removed 8 redundant places. [2024-06-14 12:42:52,399 INFO L231 Difference]: Finished difference. Result has 348 places, 522 transitions, 7026 flow [2024-06-14 12:42:52,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6935, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7026, PETRI_PLACES=348, PETRI_TRANSITIONS=522} [2024-06-14 12:42:52,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 12:42:52,400 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 522 transitions, 7026 flow [2024-06-14 12:42:52,401 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) [2024-06-14 12:42:52,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:52,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:52,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:42:52,401 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:52,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash -634805107, now seen corresponding path program 2 times [2024-06-14 12:42:52,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:52,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103329233] [2024-06-14 12:42:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:52,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103329233] [2024-06-14 12:42:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103329233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:53,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:53,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869534195] [2024-06-14 12:42:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:53,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:53,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:53,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:53,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:42:53,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 522 transitions, 7026 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) [2024-06-14 12:42:53,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:53,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:42:53,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:55,092 INFO L124 PetriNetUnfolderBase]: 3119/4900 cut-off events. [2024-06-14 12:42:55,093 INFO L125 PetriNetUnfolderBase]: For 1040575/1040599 co-relation queries the response was YES. [2024-06-14 12:42:55,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53488 conditions, 4900 events. 3119/4900 cut-off events. For 1040575/1040599 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28130 event pairs, 567 based on Foata normal form. 3/4883 useless extension candidates. Maximal degree in co-relation 53326. Up to 4489 conditions per place. [2024-06-14 12:42:55,190 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 473 selfloop transitions, 25 changer transitions 0/543 dead transitions. [2024-06-14 12:42:55,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 543 transitions, 8132 flow [2024-06-14 12:42:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:42:55,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:42:55,192 INFO L175 Difference]: Start difference. First operand has 348 places, 522 transitions, 7026 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:42:55,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 543 transitions, 8132 flow [2024-06-14 12:42:59,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 543 transitions, 8057 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:42:59,564 INFO L231 Difference]: Finished difference. Result has 350 places, 524 transitions, 7065 flow [2024-06-14 12:42:59,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6951, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7065, PETRI_PLACES=350, PETRI_TRANSITIONS=524} [2024-06-14 12:42:59,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 12:42:59,565 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 524 transitions, 7065 flow [2024-06-14 12:42:59,565 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) [2024-06-14 12:42:59,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:59,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:42:59,565 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:59,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1159150189, now seen corresponding path program 1 times [2024-06-14 12:42:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023624519] [2024-06-14 12:42:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:59,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:00,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023624519] [2024-06-14 12:43:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023624519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:00,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:43:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234747047] [2024-06-14 12:43:00,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:00,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:43:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:43:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:43:00,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:00,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 524 transitions, 7065 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:00,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:00,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:00,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:01,793 INFO L124 PetriNetUnfolderBase]: 3241/5017 cut-off events. [2024-06-14 12:43:01,794 INFO L125 PetriNetUnfolderBase]: For 1012751/1012753 co-relation queries the response was YES. [2024-06-14 12:43:01,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53513 conditions, 5017 events. 3241/5017 cut-off events. For 1012751/1012753 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28051 event pairs, 606 based on Foata normal form. 2/5018 useless extension candidates. Maximal degree in co-relation 53350. Up to 4763 conditions per place. [2024-06-14 12:43:01,881 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 497 selfloop transitions, 40 changer transitions 0/541 dead transitions. [2024-06-14 12:43:01,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 541 transitions, 8197 flow [2024-06-14 12:43:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:43:01,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:43:01,883 INFO L175 Difference]: Start difference. First operand has 350 places, 524 transitions, 7065 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:43:01,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 541 transitions, 8197 flow [2024-06-14 12:43:05,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 541 transitions, 8089 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:05,795 INFO L231 Difference]: Finished difference. Result has 352 places, 524 transitions, 7049 flow [2024-06-14 12:43:05,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7049, PETRI_PLACES=352, PETRI_TRANSITIONS=524} [2024-06-14 12:43:05,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 12:43:05,796 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 524 transitions, 7049 flow [2024-06-14 12:43:05,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:05,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:05,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:05,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:43:05,797 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:05,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1163798577, now seen corresponding path program 1 times [2024-06-14 12:43:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:05,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091279992] [2024-06-14 12:43:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:06,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:06,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091279992] [2024-06-14 12:43:06,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091279992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:06,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:06,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:06,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369852196] [2024-06-14 12:43:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:07,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:07,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 524 transitions, 7049 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:07,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:07,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:07,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:08,227 INFO L124 PetriNetUnfolderBase]: 3285/5085 cut-off events. [2024-06-14 12:43:08,227 INFO L125 PetriNetUnfolderBase]: For 1094095/1094097 co-relation queries the response was YES. [2024-06-14 12:43:08,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54183 conditions, 5085 events. 3285/5085 cut-off events. For 1094095/1094097 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28516 event pairs, 614 based on Foata normal form. 12/5096 useless extension candidates. Maximal degree in co-relation 54019. Up to 4783 conditions per place. [2024-06-14 12:43:08,307 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 503 selfloop transitions, 42 changer transitions 0/549 dead transitions. [2024-06-14 12:43:08,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 549 transitions, 8335 flow [2024-06-14 12:43:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:43:08,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:43:08,309 INFO L175 Difference]: Start difference. First operand has 352 places, 524 transitions, 7049 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:43:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 549 transitions, 8335 flow [2024-06-14 12:43:12,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 549 transitions, 8198 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:12,276 INFO L231 Difference]: Finished difference. Result has 355 places, 526 transitions, 7077 flow [2024-06-14 12:43:12,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6912, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7077, PETRI_PLACES=355, PETRI_TRANSITIONS=526} [2024-06-14 12:43:12,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 12:43:12,277 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 526 transitions, 7077 flow [2024-06-14 12:43:12,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:12,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:12,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:43:12,278 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:12,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash -516717427, now seen corresponding path program 3 times [2024-06-14 12:43:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26741300] [2024-06-14 12:43:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:12,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:13,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26741300] [2024-06-14 12:43:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26741300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372655954] [2024-06-14 12:43:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:13,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:43:13,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 526 transitions, 7077 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) [2024-06-14 12:43:13,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:13,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:43:13,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:14,982 INFO L124 PetriNetUnfolderBase]: 3203/5023 cut-off events. [2024-06-14 12:43:14,982 INFO L125 PetriNetUnfolderBase]: For 1133806/1133816 co-relation queries the response was YES. [2024-06-14 12:43:15,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54899 conditions, 5023 events. 3203/5023 cut-off events. For 1133806/1133816 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 28943 event pairs, 588 based on Foata normal form. 14/5015 useless extension candidates. Maximal degree in co-relation 54734. Up to 4545 conditions per place. [2024-06-14 12:43:15,101 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 40 changer transitions 0/549 dead transitions. [2024-06-14 12:43:15,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 549 transitions, 8261 flow [2024-06-14 12:43:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:43:15,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:43:15,102 INFO L175 Difference]: Start difference. First operand has 355 places, 526 transitions, 7077 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:43:15,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 549 transitions, 8261 flow [2024-06-14 12:43:19,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 549 transitions, 8140 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:19,149 INFO L231 Difference]: Finished difference. Result has 356 places, 528 transitions, 7106 flow [2024-06-14 12:43:19,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7106, PETRI_PLACES=356, PETRI_TRANSITIONS=528} [2024-06-14 12:43:19,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-14 12:43:19,150 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 528 transitions, 7106 flow [2024-06-14 12:43:19,150 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) [2024-06-14 12:43:19,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:19,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:43:19,150 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:19,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2092018547, now seen corresponding path program 4 times [2024-06-14 12:43:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:19,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146612482] [2024-06-14 12:43:19,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:19,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146612482] [2024-06-14 12:43:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146612482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:20,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:20,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838776205] [2024-06-14 12:43:20,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:20,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:20,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:20,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:43:20,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 528 transitions, 7106 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) [2024-06-14 12:43:20,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:20,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:43:20,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:21,485 INFO L124 PetriNetUnfolderBase]: 3227/5065 cut-off events. [2024-06-14 12:43:21,485 INFO L125 PetriNetUnfolderBase]: For 1129933/1129946 co-relation queries the response was YES. [2024-06-14 12:43:21,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54883 conditions, 5065 events. 3227/5065 cut-off events. For 1129933/1129946 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29245 event pairs, 597 based on Foata normal form. 14/5055 useless extension candidates. Maximal degree in co-relation 54717. Up to 4523 conditions per place. [2024-06-14 12:43:21,570 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 72 changer transitions 0/550 dead transitions. [2024-06-14 12:43:21,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 550 transitions, 8518 flow [2024-06-14 12:43:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:43:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:43:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:43:21,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 12:43:21,572 INFO L175 Difference]: Start difference. First operand has 356 places, 528 transitions, 7106 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:43:21,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 550 transitions, 8518 flow [2024-06-14 12:43:24,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 550 transitions, 8402 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:24,403 INFO L231 Difference]: Finished difference. Result has 358 places, 530 transitions, 7209 flow [2024-06-14 12:43:24,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7209, PETRI_PLACES=358, PETRI_TRANSITIONS=530} [2024-06-14 12:43:24,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 12:43:24,404 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 530 transitions, 7209 flow [2024-06-14 12:43:24,404 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) [2024-06-14 12:43:24,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:24,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:24,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:43:24,405 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:24,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2092013587, now seen corresponding path program 2 times [2024-06-14 12:43:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761809714] [2024-06-14 12:43:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:25,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:25,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761809714] [2024-06-14 12:43:25,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761809714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:25,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846701820] [2024-06-14 12:43:25,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:25,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:25,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:25,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:25,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 530 transitions, 7209 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:25,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:25,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:25,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:27,160 INFO L124 PetriNetUnfolderBase]: 3383/5237 cut-off events. [2024-06-14 12:43:27,160 INFO L125 PetriNetUnfolderBase]: For 1046093/1046098 co-relation queries the response was YES. [2024-06-14 12:43:27,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55298 conditions, 5237 events. 3383/5237 cut-off events. For 1046093/1046098 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29538 event pairs, 638 based on Foata normal form. 2/5236 useless extension candidates. Maximal degree in co-relation 55131. Up to 4949 conditions per place. [2024-06-14 12:43:27,284 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 57 changer transitions 0/552 dead transitions. [2024-06-14 12:43:27,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 552 transitions, 8462 flow [2024-06-14 12:43:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:43:27,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:43:27,286 INFO L175 Difference]: Start difference. First operand has 358 places, 530 transitions, 7209 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:43:27,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 552 transitions, 8462 flow [2024-06-14 12:43:30,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 552 transitions, 8268 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:30,309 INFO L231 Difference]: Finished difference. Result has 361 places, 536 transitions, 7242 flow [2024-06-14 12:43:30,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7242, PETRI_PLACES=361, PETRI_TRANSITIONS=536} [2024-06-14 12:43:30,310 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 12:43:30,310 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 536 transitions, 7242 flow [2024-06-14 12:43:30,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:30,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:30,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:30,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:43:30,310 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:30,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:30,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2091833849, now seen corresponding path program 2 times [2024-06-14 12:43:30,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:30,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862120968] [2024-06-14 12:43:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:30,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:31,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862120968] [2024-06-14 12:43:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862120968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:31,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:31,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:31,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589107202] [2024-06-14 12:43:31,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:31,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:31,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:31,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 536 transitions, 7242 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:31,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:31,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:31,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:32,664 INFO L124 PetriNetUnfolderBase]: 3391/5248 cut-off events. [2024-06-14 12:43:32,665 INFO L125 PetriNetUnfolderBase]: For 1061185/1061193 co-relation queries the response was YES. [2024-06-14 12:43:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55242 conditions, 5248 events. 3391/5248 cut-off events. For 1061185/1061193 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29615 event pairs, 646 based on Foata normal form. 6/5252 useless extension candidates. Maximal degree in co-relation 55074. Up to 5040 conditions per place. [2024-06-14 12:43:32,785 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 31 changer transitions 0/551 dead transitions. [2024-06-14 12:43:32,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 551 transitions, 8448 flow [2024-06-14 12:43:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 12:43:32,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-14 12:43:32,787 INFO L175 Difference]: Start difference. First operand has 361 places, 536 transitions, 7242 flow. Second operand 9 states and 133 transitions. [2024-06-14 12:43:32,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 551 transitions, 8448 flow [2024-06-14 12:43:36,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 551 transitions, 8322 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:36,216 INFO L231 Difference]: Finished difference. Result has 365 places, 538 transitions, 7265 flow [2024-06-14 12:43:36,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7116, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7265, PETRI_PLACES=365, PETRI_TRANSITIONS=538} [2024-06-14 12:43:36,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 12:43:36,217 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 538 transitions, 7265 flow [2024-06-14 12:43:36,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:36,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:36,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:36,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:43:36,217 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:36,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2091840607, now seen corresponding path program 3 times [2024-06-14 12:43:36,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:36,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273458130] [2024-06-14 12:43:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273458130] [2024-06-14 12:43:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273458130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:37,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334379307] [2024-06-14 12:43:37,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:37,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:37,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:37,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 538 transitions, 7265 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:37,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:37,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:37,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:38,831 INFO L124 PetriNetUnfolderBase]: 3385/5241 cut-off events. [2024-06-14 12:43:38,831 INFO L125 PetriNetUnfolderBase]: For 1066588/1066593 co-relation queries the response was YES. [2024-06-14 12:43:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55067 conditions, 5241 events. 3385/5241 cut-off events. For 1066588/1066593 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29599 event pairs, 639 based on Foata normal form. 2/5240 useless extension candidates. Maximal degree in co-relation 54898. Up to 4953 conditions per place. [2024-06-14 12:43:38,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 56 changer transitions 0/555 dead transitions. [2024-06-14 12:43:38,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 555 transitions, 8429 flow [2024-06-14 12:43:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:43:38,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 12:43:38,943 INFO L175 Difference]: Start difference. First operand has 365 places, 538 transitions, 7265 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:43:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 555 transitions, 8429 flow [2024-06-14 12:43:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 555 transitions, 8274 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:42,492 INFO L231 Difference]: Finished difference. Result has 367 places, 538 transitions, 7228 flow [2024-06-14 12:43:42,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7228, PETRI_PLACES=367, PETRI_TRANSITIONS=538} [2024-06-14 12:43:42,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-14 12:43:42,493 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 538 transitions, 7228 flow [2024-06-14 12:43:42,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:42,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:42,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:42,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:43:42,494 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:42,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash 846777021, now seen corresponding path program 3 times [2024-06-14 12:43:42,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:42,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036147032] [2024-06-14 12:43:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:43,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036147032] [2024-06-14 12:43:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036147032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:43,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686892519] [2024-06-14 12:43:43,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:43,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:43,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:43,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:43,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 538 transitions, 7228 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:43,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:43,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:43,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:44,759 INFO L124 PetriNetUnfolderBase]: 3452/5342 cut-off events. [2024-06-14 12:43:44,759 INFO L125 PetriNetUnfolderBase]: For 1153658/1153663 co-relation queries the response was YES. [2024-06-14 12:43:44,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57298 conditions, 5342 events. 3452/5342 cut-off events. For 1153658/1153663 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30201 event pairs, 638 based on Foata normal form. 2/5341 useless extension candidates. Maximal degree in co-relation 57128. Up to 4853 conditions per place. [2024-06-14 12:43:44,848 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 471 selfloop transitions, 89 changer transitions 0/564 dead transitions. [2024-06-14 12:43:44,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 564 transitions, 8864 flow [2024-06-14 12:43:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:43:44,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:43:44,850 INFO L175 Difference]: Start difference. First operand has 367 places, 538 transitions, 7228 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:43:44,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 564 transitions, 8864 flow [2024-06-14 12:43:47,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 564 transitions, 8667 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:43:47,787 INFO L231 Difference]: Finished difference. Result has 368 places, 542 transitions, 7382 flow [2024-06-14 12:43:47,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7382, PETRI_PLACES=368, PETRI_TRANSITIONS=542} [2024-06-14 12:43:47,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 12:43:47,788 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 542 transitions, 7382 flow [2024-06-14 12:43:47,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:47,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:47,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:43:47,788 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:47,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1863932699, now seen corresponding path program 4 times [2024-06-14 12:43:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:47,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567170818] [2024-06-14 12:43:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:48,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:48,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567170818] [2024-06-14 12:43:48,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567170818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:48,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:48,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263768984] [2024-06-14 12:43:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:48,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:48,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 542 transitions, 7382 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:48,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:48,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:48,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:50,036 INFO L124 PetriNetUnfolderBase]: 3460/5353 cut-off events. [2024-06-14 12:43:50,037 INFO L125 PetriNetUnfolderBase]: For 1175804/1175812 co-relation queries the response was YES. [2024-06-14 12:43:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57806 conditions, 5353 events. 3460/5353 cut-off events. For 1175804/1175812 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30276 event pairs, 664 based on Foata normal form. 6/5357 useless extension candidates. Maximal degree in co-relation 57635. Up to 5145 conditions per place. [2024-06-14 12:43:50,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 523 selfloop transitions, 32 changer transitions 0/559 dead transitions. [2024-06-14 12:43:50,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 559 transitions, 8631 flow [2024-06-14 12:43:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 12:43:50,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-14 12:43:50,120 INFO L175 Difference]: Start difference. First operand has 368 places, 542 transitions, 7382 flow. Second operand 9 states and 132 transitions. [2024-06-14 12:43:50,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 559 transitions, 8631 flow [2024-06-14 12:43:53,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 559 transitions, 8434 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 12:43:53,202 INFO L231 Difference]: Finished difference. Result has 373 places, 546 transitions, 7371 flow [2024-06-14 12:43:53,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7195, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7371, PETRI_PLACES=373, PETRI_TRANSITIONS=546} [2024-06-14 12:43:53,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 12:43:53,203 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 546 transitions, 7371 flow [2024-06-14 12:43:53,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:53,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:53,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:53,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:43:53,204 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:53,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:53,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1855658489, now seen corresponding path program 5 times [2024-06-14 12:43:53,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:53,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341704130] [2024-06-14 12:43:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:54,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:54,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341704130] [2024-06-14 12:43:54,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341704130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:54,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:54,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:54,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10228440] [2024-06-14 12:43:54,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:54,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:54,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:54,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:54,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:54,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 546 transitions, 7371 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:54,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:54,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:54,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:55,416 INFO L124 PetriNetUnfolderBase]: 3455/5346 cut-off events. [2024-06-14 12:43:55,416 INFO L125 PetriNetUnfolderBase]: For 1178839/1178847 co-relation queries the response was YES. [2024-06-14 12:43:55,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57533 conditions, 5346 events. 3455/5346 cut-off events. For 1178839/1178847 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30252 event pairs, 663 based on Foata normal form. 6/5350 useless extension candidates. Maximal degree in co-relation 57359. Up to 5126 conditions per place. [2024-06-14 12:43:55,499 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 513 selfloop transitions, 43 changer transitions 0/560 dead transitions. [2024-06-14 12:43:55,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 560 transitions, 8555 flow [2024-06-14 12:43:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 12:43:55,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-14 12:43:55,501 INFO L175 Difference]: Start difference. First operand has 373 places, 546 transitions, 7371 flow. Second operand 9 states and 133 transitions. [2024-06-14 12:43:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 560 transitions, 8555 flow [2024-06-14 12:43:59,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 560 transitions, 8428 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:59,038 INFO L231 Difference]: Finished difference. Result has 376 places, 547 transitions, 7375 flow [2024-06-14 12:43:59,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7244, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7375, PETRI_PLACES=376, PETRI_TRANSITIONS=547} [2024-06-14 12:43:59,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 12:43:59,039 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 547 transitions, 7375 flow [2024-06-14 12:43:59,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:59,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:59,039 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] [2024-06-14 12:43:59,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:43:59,040 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:59,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 974499545, now seen corresponding path program 1 times [2024-06-14 12:43:59,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:59,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648575950] [2024-06-14 12:43:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:59,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:59,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:59,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648575950] [2024-06-14 12:43:59,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648575950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:59,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:59,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031328631] [2024-06-14 12:43:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:59,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:43:59,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 547 transitions, 7375 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:43:59,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:59,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:43:59,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:01,053 INFO L124 PetriNetUnfolderBase]: 3471/5374 cut-off events. [2024-06-14 12:44:01,054 INFO L125 PetriNetUnfolderBase]: For 1209472/1209482 co-relation queries the response was YES. [2024-06-14 12:44:01,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58038 conditions, 5374 events. 3471/5374 cut-off events. For 1209472/1209482 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30336 event pairs, 468 based on Foata normal form. 12/5384 useless extension candidates. Maximal degree in co-relation 57863. Up to 4975 conditions per place. [2024-06-14 12:44:01,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 40 changer transitions 0/581 dead transitions. [2024-06-14 12:44:01,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 581 transitions, 8783 flow [2024-06-14 12:44:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:44:01,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 12:44:01,151 INFO L175 Difference]: Start difference. First operand has 376 places, 547 transitions, 7375 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:44:01,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 581 transitions, 8783 flow [2024-06-14 12:44:05,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 581 transitions, 8626 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:05,291 INFO L231 Difference]: Finished difference. Result has 378 places, 550 transitions, 7466 flow [2024-06-14 12:44:05,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7466, PETRI_PLACES=378, PETRI_TRANSITIONS=550} [2024-06-14 12:44:05,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 12:44:05,292 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 550 transitions, 7466 flow [2024-06-14 12:44:05,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:05,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:05,292 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] [2024-06-14 12:44:05,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:44:05,292 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:05,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:05,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1240523255, now seen corresponding path program 2 times [2024-06-14 12:44:05,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:05,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888446331] [2024-06-14 12:44:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:05,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:06,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:06,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888446331] [2024-06-14 12:44:06,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888446331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:06,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:06,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:06,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925642627] [2024-06-14 12:44:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:06,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:06,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:06,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 550 transitions, 7466 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:06,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:06,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:07,904 INFO L124 PetriNetUnfolderBase]: 3487/5398 cut-off events. [2024-06-14 12:44:07,904 INFO L125 PetriNetUnfolderBase]: For 1232132/1232142 co-relation queries the response was YES. [2024-06-14 12:44:07,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58759 conditions, 5398 events. 3487/5398 cut-off events. For 1232132/1232142 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30611 event pairs, 598 based on Foata normal form. 12/5408 useless extension candidates. Maximal degree in co-relation 58583. Up to 5062 conditions per place. [2024-06-14 12:44:07,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 533 selfloop transitions, 42 changer transitions 0/579 dead transitions. [2024-06-14 12:44:07,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 579 transitions, 8862 flow [2024-06-14 12:44:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:44:07,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 12:44:07,996 INFO L175 Difference]: Start difference. First operand has 378 places, 550 transitions, 7466 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:44:07,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 579 transitions, 8862 flow [2024-06-14 12:44:12,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 579 transitions, 8636 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:12,370 INFO L231 Difference]: Finished difference. Result has 380 places, 553 transitions, 7498 flow [2024-06-14 12:44:12,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7498, PETRI_PLACES=380, PETRI_TRANSITIONS=553} [2024-06-14 12:44:12,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-14 12:44:12,371 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 553 transitions, 7498 flow [2024-06-14 12:44:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:12,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:12,371 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] [2024-06-14 12:44:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:44:12,372 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:12,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2132026515, now seen corresponding path program 3 times [2024-06-14 12:44:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376925715] [2024-06-14 12:44:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:13,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:13,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376925715] [2024-06-14 12:44:13,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376925715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:13,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:13,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:13,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295058766] [2024-06-14 12:44:13,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:13,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:13,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:13,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:13,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:13,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:13,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 553 transitions, 7498 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:13,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:13,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:13,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:14,839 INFO L124 PetriNetUnfolderBase]: 3503/5422 cut-off events. [2024-06-14 12:44:14,839 INFO L125 PetriNetUnfolderBase]: For 1256582/1256592 co-relation queries the response was YES. [2024-06-14 12:44:14,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59128 conditions, 5422 events. 3503/5422 cut-off events. For 1256582/1256592 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30711 event pairs, 605 based on Foata normal form. 12/5432 useless extension candidates. Maximal degree in co-relation 58951. Up to 5058 conditions per place. [2024-06-14 12:44:14,921 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 47 changer transitions 0/583 dead transitions. [2024-06-14 12:44:14,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 583 transitions, 8910 flow [2024-06-14 12:44:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:44:14,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:44:14,923 INFO L175 Difference]: Start difference. First operand has 380 places, 553 transitions, 7498 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:44:14,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 583 transitions, 8910 flow [2024-06-14 12:44:18,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 583 transitions, 8674 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:18,761 INFO L231 Difference]: Finished difference. Result has 382 places, 556 transitions, 7536 flow [2024-06-14 12:44:18,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7262, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7536, PETRI_PLACES=382, PETRI_TRANSITIONS=556} [2024-06-14 12:44:18,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-14 12:44:18,762 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 556 transitions, 7536 flow [2024-06-14 12:44:18,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:18,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:18,763 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] [2024-06-14 12:44:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:44:18,763 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2132364849, now seen corresponding path program 1 times [2024-06-14 12:44:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336502760] [2024-06-14 12:44:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:19,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:19,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336502760] [2024-06-14 12:44:19,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336502760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:19,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:19,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:44:19,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768048013] [2024-06-14 12:44:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:44:19,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:44:19,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:44:19,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:19,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 556 transitions, 7536 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:44:19,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:19,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:19,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:21,365 INFO L124 PetriNetUnfolderBase]: 3698/5755 cut-off events. [2024-06-14 12:44:21,365 INFO L125 PetriNetUnfolderBase]: For 1637284/1637291 co-relation queries the response was YES. [2024-06-14 12:44:21,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62245 conditions, 5755 events. 3698/5755 cut-off events. For 1637284/1637291 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32955 event pairs, 678 based on Foata normal form. 54/5806 useless extension candidates. Maximal degree in co-relation 62067. Up to 4734 conditions per place. [2024-06-14 12:44:21,452 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 487 selfloop transitions, 105 changer transitions 0/596 dead transitions. [2024-06-14 12:44:21,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 596 transitions, 9550 flow [2024-06-14 12:44:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:44:21,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:44:21,453 INFO L175 Difference]: Start difference. First operand has 382 places, 556 transitions, 7536 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:44:21,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 596 transitions, 9550 flow [2024-06-14 12:44:25,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 596 transitions, 9298 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:25,559 INFO L231 Difference]: Finished difference. Result has 385 places, 558 transitions, 7641 flow [2024-06-14 12:44:25,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7284, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7641, PETRI_PLACES=385, PETRI_TRANSITIONS=558} [2024-06-14 12:44:25,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-14 12:44:25,559 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 558 transitions, 7641 flow [2024-06-14 12:44:25,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:44:25,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:25,560 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] [2024-06-14 12:44:25,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:44:25,560 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:25,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1859041713, now seen corresponding path program 4 times [2024-06-14 12:44:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:25,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947180210] [2024-06-14 12:44:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:25,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:26,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947180210] [2024-06-14 12:44:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947180210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:26,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925647876] [2024-06-14 12:44:26,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:26,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:26,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:26,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 558 transitions, 7641 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:26,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:26,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:26,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:27,990 INFO L124 PetriNetUnfolderBase]: 3714/5769 cut-off events. [2024-06-14 12:44:27,990 INFO L125 PetriNetUnfolderBase]: For 1320913/1320921 co-relation queries the response was YES. [2024-06-14 12:44:28,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62869 conditions, 5769 events. 3714/5769 cut-off events. For 1320913/1320921 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33101 event pairs, 710 based on Foata normal form. 8/5775 useless extension candidates. Maximal degree in co-relation 62690. Up to 5351 conditions per place. [2024-06-14 12:44:28,093 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 71 changer transitions 0/580 dead transitions. [2024-06-14 12:44:28,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 580 transitions, 9027 flow [2024-06-14 12:44:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:44:28,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 12:44:28,094 INFO L175 Difference]: Start difference. First operand has 385 places, 558 transitions, 7641 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:44:28,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 580 transitions, 9027 flow [2024-06-14 12:44:32,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 580 transitions, 8750 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:32,524 INFO L231 Difference]: Finished difference. Result has 387 places, 561 transitions, 7696 flow [2024-06-14 12:44:32,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7696, PETRI_PLACES=387, PETRI_TRANSITIONS=561} [2024-06-14 12:44:32,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-14 12:44:32,525 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 561 transitions, 7696 flow [2024-06-14 12:44:32,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:32,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:32,525 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] [2024-06-14 12:44:32,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:44:32,526 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:32,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1859368143, now seen corresponding path program 5 times [2024-06-14 12:44:32,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:32,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112211441] [2024-06-14 12:44:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:32,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:33,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:33,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112211441] [2024-06-14 12:44:33,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112211441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:33,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:33,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747979551] [2024-06-14 12:44:33,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:33,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:33,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 561 transitions, 7696 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:33,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:33,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:34,874 INFO L124 PetriNetUnfolderBase]: 3756/5831 cut-off events. [2024-06-14 12:44:34,875 INFO L125 PetriNetUnfolderBase]: For 1369363/1369371 co-relation queries the response was YES. [2024-06-14 12:44:35,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63995 conditions, 5831 events. 3756/5831 cut-off events. For 1369363/1369371 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33450 event pairs, 680 based on Foata normal form. 8/5837 useless extension candidates. Maximal degree in co-relation 63815. Up to 5367 conditions per place. [2024-06-14 12:44:35,154 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 79 changer transitions 0/588 dead transitions. [2024-06-14 12:44:35,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 588 transitions, 9540 flow [2024-06-14 12:44:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:44:35,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 12:44:35,155 INFO L175 Difference]: Start difference. First operand has 387 places, 561 transitions, 7696 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:44:35,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 588 transitions, 9540 flow [2024-06-14 12:44:39,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 588 transitions, 9230 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:39,613 INFO L231 Difference]: Finished difference. Result has 389 places, 567 transitions, 7924 flow [2024-06-14 12:44:39,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7386, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7924, PETRI_PLACES=389, PETRI_TRANSITIONS=567} [2024-06-14 12:44:39,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 12:44:39,614 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 567 transitions, 7924 flow [2024-06-14 12:44:39,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:39,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:39,614 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] [2024-06-14 12:44:39,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:44:39,614 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:39,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash 586712759, now seen corresponding path program 6 times [2024-06-14 12:44:39,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:39,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349726779] [2024-06-14 12:44:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:39,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:40,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:40,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349726779] [2024-06-14 12:44:40,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349726779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:40,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:40,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:40,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443960987] [2024-06-14 12:44:40,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:40,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:40,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:40,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:40,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:40,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 567 transitions, 7924 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:40,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:40,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:40,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:41,868 INFO L124 PetriNetUnfolderBase]: 3746/5817 cut-off events. [2024-06-14 12:44:41,869 INFO L125 PetriNetUnfolderBase]: For 1355431/1355439 co-relation queries the response was YES. [2024-06-14 12:44:41,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63182 conditions, 5817 events. 3746/5817 cut-off events. For 1355431/1355439 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33394 event pairs, 682 based on Foata normal form. 8/5823 useless extension candidates. Maximal degree in co-relation 63001. Up to 5399 conditions per place. [2024-06-14 12:44:41,963 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 70 changer transitions 0/586 dead transitions. [2024-06-14 12:44:41,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 586 transitions, 9144 flow [2024-06-14 12:44:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:44:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:44:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:44:41,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:44:41,967 INFO L175 Difference]: Start difference. First operand has 389 places, 567 transitions, 7924 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:44:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 586 transitions, 9144 flow [2024-06-14 12:44:46,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 586 transitions, 8707 flow, removed 173 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:46,242 INFO L231 Difference]: Finished difference. Result has 393 places, 567 transitions, 7633 flow [2024-06-14 12:44:46,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7633, PETRI_PLACES=393, PETRI_TRANSITIONS=567} [2024-06-14 12:44:46,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 12:44:46,244 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 567 transitions, 7633 flow [2024-06-14 12:44:46,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:46,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:46,244 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] [2024-06-14 12:44:46,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:44:46,246 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:46,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:46,246 INFO L85 PathProgramCache]: Analyzing trace with hash -872599870, now seen corresponding path program 1 times [2024-06-14 12:44:46,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:46,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327775429] [2024-06-14 12:44:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:46,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:47,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:47,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327775429] [2024-06-14 12:44:47,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327775429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:47,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:47,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:44:47,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169007781] [2024-06-14 12:44:47,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:47,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:44:47,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:47,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:44:47,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:44:47,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:47,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 567 transitions, 7633 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:47,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:47,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:47,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:48,678 INFO L124 PetriNetUnfolderBase]: 3740/5804 cut-off events. [2024-06-14 12:44:48,678 INFO L125 PetriNetUnfolderBase]: For 1330678/1330683 co-relation queries the response was YES. [2024-06-14 12:44:48,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62396 conditions, 5804 events. 3740/5804 cut-off events. For 1330678/1330683 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33292 event pairs, 674 based on Foata normal form. 2/5803 useless extension candidates. Maximal degree in co-relation 62213. Up to 5165 conditions per place. [2024-06-14 12:44:48,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 499 selfloop transitions, 90 changer transitions 0/593 dead transitions. [2024-06-14 12:44:48,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 593 transitions, 8901 flow [2024-06-14 12:44:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:44:48,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 12:44:48,775 INFO L175 Difference]: Start difference. First operand has 393 places, 567 transitions, 7633 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:44:48,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 593 transitions, 8901 flow [2024-06-14 12:44:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 593 transitions, 8707 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 12:44:52,804 INFO L231 Difference]: Finished difference. Result has 393 places, 567 transitions, 7635 flow [2024-06-14 12:44:52,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7439, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7635, PETRI_PLACES=393, PETRI_TRANSITIONS=567} [2024-06-14 12:44:52,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 12:44:52,805 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 567 transitions, 7635 flow [2024-06-14 12:44:52,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:44:52,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:52,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:52,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:44:52,806 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:52,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1233926069, now seen corresponding path program 1 times [2024-06-14 12:44:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:52,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403468063] [2024-06-14 12:44:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:52,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403468063] [2024-06-14 12:44:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403468063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:53,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:53,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989548821] [2024-06-14 12:44:53,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:53,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:53,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:53,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:44:53,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:44:53,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 567 transitions, 7635 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:53,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:53,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:44:53,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:55,049 INFO L124 PetriNetUnfolderBase]: 3750/5833 cut-off events. [2024-06-14 12:44:55,050 INFO L125 PetriNetUnfolderBase]: For 1354030/1354037 co-relation queries the response was YES. [2024-06-14 12:44:55,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62805 conditions, 5833 events. 3750/5833 cut-off events. For 1354030/1354037 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33513 event pairs, 686 based on Foata normal form. 6/5836 useless extension candidates. Maximal degree in co-relation 62621. Up to 5205 conditions per place. [2024-06-14 12:44:55,146 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 507 selfloop transitions, 93 changer transitions 0/604 dead transitions. [2024-06-14 12:44:55,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 604 transitions, 9072 flow [2024-06-14 12:44:55,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:44:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:44:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:44:55,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:44:55,148 INFO L175 Difference]: Start difference. First operand has 393 places, 567 transitions, 7635 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:44:55,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 604 transitions, 9072 flow [2024-06-14 12:44:59,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 604 transitions, 8869 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:59,253 INFO L231 Difference]: Finished difference. Result has 395 places, 575 transitions, 7774 flow [2024-06-14 12:44:59,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7774, PETRI_PLACES=395, PETRI_TRANSITIONS=575} [2024-06-14 12:44:59,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 12:44:59,259 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 575 transitions, 7774 flow [2024-06-14 12:44:59,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:59,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:59,259 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] [2024-06-14 12:44:59,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:44:59,260 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:59,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash 347458759, now seen corresponding path program 2 times [2024-06-14 12:44:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024614064] [2024-06-14 12:44:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:59,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:59,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:59,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024614064] [2024-06-14 12:44:59,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024614064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:59,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:59,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:44:59,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977456811] [2024-06-14 12:44:59,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:59,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:44:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:44:59,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:00,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:00,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 575 transitions, 7774 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:00,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:00,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:00,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:01,560 INFO L124 PetriNetUnfolderBase]: 3760/5843 cut-off events. [2024-06-14 12:45:01,560 INFO L125 PetriNetUnfolderBase]: For 1375125/1375130 co-relation queries the response was YES. [2024-06-14 12:45:01,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63456 conditions, 5843 events. 3760/5843 cut-off events. For 1375125/1375130 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33583 event pairs, 691 based on Foata normal form. 2/5842 useless extension candidates. Maximal degree in co-relation 63270. Up to 5219 conditions per place. [2024-06-14 12:45:01,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 513 selfloop transitions, 92 changer transitions 0/609 dead transitions. [2024-06-14 12:45:01,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 609 transitions, 9221 flow [2024-06-14 12:45:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:45:01,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:45:01,683 INFO L175 Difference]: Start difference. First operand has 395 places, 575 transitions, 7774 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:45:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 609 transitions, 9221 flow [2024-06-14 12:45:06,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 609 transitions, 9054 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:45:06,643 INFO L231 Difference]: Finished difference. Result has 400 places, 583 transitions, 7957 flow [2024-06-14 12:45:06,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7611, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7957, PETRI_PLACES=400, PETRI_TRANSITIONS=583} [2024-06-14 12:45:06,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 12:45:06,645 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 583 transitions, 7957 flow [2024-06-14 12:45:06,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:06,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:06,646 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] [2024-06-14 12:45:06,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:45:06,646 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)] === [2024-06-14 12:45:06,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 790982387, now seen corresponding path program 3 times [2024-06-14 12:45:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:06,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894724046] [2024-06-14 12:45:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894724046] [2024-06-14 12:45:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894724046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:07,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:07,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:07,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033586396] [2024-06-14 12:45:07,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:07,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:07,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:07,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:07,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 583 transitions, 7957 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:07,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:07,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:07,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:08,871 INFO L124 PetriNetUnfolderBase]: 3770/5861 cut-off events. [2024-06-14 12:45:08,872 INFO L125 PetriNetUnfolderBase]: For 1397647/1397654 co-relation queries the response was YES. [2024-06-14 12:45:08,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64178 conditions, 5861 events. 3770/5861 cut-off events. For 1397647/1397654 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33723 event pairs, 684 based on Foata normal form. 6/5864 useless extension candidates. Maximal degree in co-relation 63990. Up to 5186 conditions per place. [2024-06-14 12:45:08,983 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 108 changer transitions 0/613 dead transitions. [2024-06-14 12:45:08,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 613 transitions, 9608 flow [2024-06-14 12:45:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:45:08,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:45:08,985 INFO L175 Difference]: Start difference. First operand has 400 places, 583 transitions, 7957 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:45:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 613 transitions, 9608 flow [2024-06-14 12:45:13,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 613 transitions, 9466 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:45:13,314 INFO L231 Difference]: Finished difference. Result has 404 places, 586 transitions, 8106 flow [2024-06-14 12:45:13,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7815, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8106, PETRI_PLACES=404, PETRI_TRANSITIONS=586} [2024-06-14 12:45:13,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 12:45:13,314 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 586 transitions, 8106 flow [2024-06-14 12:45:13,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:13,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:13,315 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] [2024-06-14 12:45:13,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:45:13,315 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)] === [2024-06-14 12:45:13,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash 796523699, now seen corresponding path program 1 times [2024-06-14 12:45:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:13,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610209279] [2024-06-14 12:45:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:13,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610209279] [2024-06-14 12:45:13,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610209279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:13,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266968146] [2024-06-14 12:45:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:13,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:13,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:14,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:14,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 586 transitions, 8106 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:14,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:14,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:14,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:15,616 INFO L124 PetriNetUnfolderBase]: 3790/5877 cut-off events. [2024-06-14 12:45:15,616 INFO L125 PetriNetUnfolderBase]: For 1437528/1437533 co-relation queries the response was YES. [2024-06-14 12:45:15,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64772 conditions, 5877 events. 3790/5877 cut-off events. For 1437528/1437533 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33753 event pairs, 682 based on Foata normal form. 4/5878 useless extension candidates. Maximal degree in co-relation 64583. Up to 5233 conditions per place. [2024-06-14 12:45:15,714 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 515 selfloop transitions, 99 changer transitions 0/618 dead transitions. [2024-06-14 12:45:15,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 618 transitions, 9575 flow [2024-06-14 12:45:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:45:15,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 12:45:15,716 INFO L175 Difference]: Start difference. First operand has 404 places, 586 transitions, 8106 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:45:15,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 618 transitions, 9575 flow [2024-06-14 12:45:20,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 618 transitions, 9327 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:20,074 INFO L231 Difference]: Finished difference. Result has 407 places, 590 transitions, 8202 flow [2024-06-14 12:45:20,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7858, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8202, PETRI_PLACES=407, PETRI_TRANSITIONS=590} [2024-06-14 12:45:20,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-14 12:45:20,075 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 590 transitions, 8202 flow [2024-06-14 12:45:20,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:20,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:20,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:20,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:45:20,075 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)] === [2024-06-14 12:45:20,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash 796523327, now seen corresponding path program 4 times [2024-06-14 12:45:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:20,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570611739] [2024-06-14 12:45:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:20,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:20,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570611739] [2024-06-14 12:45:20,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570611739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:20,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:20,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:20,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556838361] [2024-06-14 12:45:20,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:20,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:20,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:20,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:20,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 590 transitions, 8202 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:20,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:20,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:20,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:22,257 INFO L124 PetriNetUnfolderBase]: 3800/5899 cut-off events. [2024-06-14 12:45:22,258 INFO L125 PetriNetUnfolderBase]: For 1443207/1443212 co-relation queries the response was YES. [2024-06-14 12:45:22,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65130 conditions, 5899 events. 3800/5899 cut-off events. For 1443207/1443212 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33928 event pairs, 687 based on Foata normal form. 2/5898 useless extension candidates. Maximal degree in co-relation 64940. Up to 5227 conditions per place. [2024-06-14 12:45:22,356 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 102 changer transitions 0/616 dead transitions. [2024-06-14 12:45:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 616 transitions, 9596 flow [2024-06-14 12:45:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:45:22,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:45:22,358 INFO L175 Difference]: Start difference. First operand has 407 places, 590 transitions, 8202 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:45:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 616 transitions, 9596 flow [2024-06-14 12:45:26,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 616 transitions, 9289 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:26,902 INFO L231 Difference]: Finished difference. Result has 408 places, 593 transitions, 8190 flow [2024-06-14 12:45:26,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7895, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8190, PETRI_PLACES=408, PETRI_TRANSITIONS=593} [2024-06-14 12:45:26,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 12:45:26,902 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 593 transitions, 8190 flow [2024-06-14 12:45:26,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:26,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:26,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:26,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:45:26,903 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)] === [2024-06-14 12:45:26,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:26,904 INFO L85 PathProgramCache]: Analyzing trace with hash 351482528, now seen corresponding path program 1 times [2024-06-14 12:45:26,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:26,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683587189] [2024-06-14 12:45:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683587189] [2024-06-14 12:45:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683587189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:27,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127874371] [2024-06-14 12:45:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:27,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:27,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:27,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 593 transitions, 8190 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:27,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:27,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:29,426 INFO L124 PetriNetUnfolderBase]: 3870/5997 cut-off events. [2024-06-14 12:45:29,427 INFO L125 PetriNetUnfolderBase]: For 1540006/1540011 co-relation queries the response was YES. [2024-06-14 12:45:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66937 conditions, 5997 events. 3870/5997 cut-off events. For 1540006/1540011 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34505 event pairs, 674 based on Foata normal form. 6/6000 useless extension candidates. Maximal degree in co-relation 66746. Up to 5233 conditions per place. [2024-06-14 12:45:29,530 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 505 selfloop transitions, 122 changer transitions 0/631 dead transitions. [2024-06-14 12:45:29,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 631 transitions, 10186 flow [2024-06-14 12:45:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:45:29,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:45:29,531 INFO L175 Difference]: Start difference. First operand has 408 places, 593 transitions, 8190 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:45:29,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 631 transitions, 10186 flow [2024-06-14 12:45:34,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 631 transitions, 9933 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:34,050 INFO L231 Difference]: Finished difference. Result has 412 places, 605 transitions, 8603 flow [2024-06-14 12:45:34,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7937, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8603, PETRI_PLACES=412, PETRI_TRANSITIONS=605} [2024-06-14 12:45:34,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 12:45:34,051 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 605 transitions, 8603 flow [2024-06-14 12:45:34,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:34,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:34,051 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] [2024-06-14 12:45:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:45:34,051 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)] === [2024-06-14 12:45:34,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash 800248349, now seen corresponding path program 2 times [2024-06-14 12:45:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:34,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645530033] [2024-06-14 12:45:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:34,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:34,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645530033] [2024-06-14 12:45:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645530033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:34,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:34,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832209110] [2024-06-14 12:45:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:34,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:34,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:34,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:34,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:34,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 605 transitions, 8603 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:34,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:34,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:34,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:36,539 INFO L124 PetriNetUnfolderBase]: 3910/6040 cut-off events. [2024-06-14 12:45:36,540 INFO L125 PetriNetUnfolderBase]: For 1589139/1589144 co-relation queries the response was YES. [2024-06-14 12:45:36,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68591 conditions, 6040 events. 3910/6040 cut-off events. For 1589139/1589144 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34650 event pairs, 682 based on Foata normal form. 8/6045 useless extension candidates. Maximal degree in co-relation 68398. Up to 5261 conditions per place. [2024-06-14 12:45:36,638 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 507 selfloop transitions, 128 changer transitions 0/639 dead transitions. [2024-06-14 12:45:36,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 639 transitions, 10553 flow [2024-06-14 12:45:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:45:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:45:36,639 INFO L175 Difference]: Start difference. First operand has 412 places, 605 transitions, 8603 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:45:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 639 transitions, 10553 flow [2024-06-14 12:45:41,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 639 transitions, 10148 flow, removed 139 selfloop flow, removed 5 redundant places. [2024-06-14 12:45:41,367 INFO L231 Difference]: Finished difference. Result has 416 places, 613 transitions, 8784 flow [2024-06-14 12:45:41,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8238, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8784, PETRI_PLACES=416, PETRI_TRANSITIONS=613} [2024-06-14 12:45:41,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-14 12:45:41,370 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 613 transitions, 8784 flow [2024-06-14 12:45:41,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:41,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:41,371 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] [2024-06-14 12:45:41,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:45:41,371 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)] === [2024-06-14 12:45:41,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -388563599, now seen corresponding path program 3 times [2024-06-14 12:45:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:41,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855245033] [2024-06-14 12:45:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:41,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855245033] [2024-06-14 12:45:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855245033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:42,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:42,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842045307] [2024-06-14 12:45:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:42,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:42,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:42,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 613 transitions, 8784 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:44,130 INFO L124 PetriNetUnfolderBase]: 3910/6047 cut-off events. [2024-06-14 12:45:44,130 INFO L125 PetriNetUnfolderBase]: For 1563721/1563726 co-relation queries the response was YES. [2024-06-14 12:45:44,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68789 conditions, 6047 events. 3910/6047 cut-off events. For 1563721/1563726 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34778 event pairs, 685 based on Foata normal form. 4/6048 useless extension candidates. Maximal degree in co-relation 68594. Up to 5263 conditions per place. [2024-06-14 12:45:44,235 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 509 selfloop transitions, 130 changer transitions 0/643 dead transitions. [2024-06-14 12:45:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 643 transitions, 10556 flow [2024-06-14 12:45:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:45:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:45:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:45:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 12:45:44,236 INFO L175 Difference]: Start difference. First operand has 416 places, 613 transitions, 8784 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:45:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 643 transitions, 10556 flow [2024-06-14 12:45:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 643 transitions, 10111 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:49,899 INFO L231 Difference]: Finished difference. Result has 419 places, 617 transitions, 8728 flow [2024-06-14 12:45:49,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8342, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8728, PETRI_PLACES=419, PETRI_TRANSITIONS=617} [2024-06-14 12:45:49,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 12:45:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 617 transitions, 8728 flow [2024-06-14 12:45:49,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:45:49,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:49,913 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] [2024-06-14 12:45:49,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:45:49,913 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)] === [2024-06-14 12:45:49,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash 351470779, now seen corresponding path program 5 times [2024-06-14 12:45:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:49,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464491850] [2024-06-14 12:45:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:49,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:50,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464491850] [2024-06-14 12:45:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464491850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:50,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:50,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172582517] [2024-06-14 12:45:50,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:50,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:50,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:50,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 617 transitions, 8728 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:50,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:50,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:52,322 INFO L124 PetriNetUnfolderBase]: 3920/6068 cut-off events. [2024-06-14 12:45:52,322 INFO L125 PetriNetUnfolderBase]: For 1564688/1564693 co-relation queries the response was YES. [2024-06-14 12:45:52,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68651 conditions, 6068 events. 3920/6068 cut-off events. For 1564688/1564693 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34946 event pairs, 709 based on Foata normal form. 2/6067 useless extension candidates. Maximal degree in co-relation 68455. Up to 5218 conditions per place. [2024-06-14 12:45:52,434 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 143 changer transitions 0/642 dead transitions. [2024-06-14 12:45:52,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 642 transitions, 10718 flow [2024-06-14 12:45:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:45:52,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:45:52,436 INFO L175 Difference]: Start difference. First operand has 419 places, 617 transitions, 8728 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:45:52,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 642 transitions, 10718 flow [2024-06-14 12:45:59,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 642 transitions, 10416 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:59,219 INFO L231 Difference]: Finished difference. Result has 421 places, 620 transitions, 8802 flow [2024-06-14 12:45:59,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8426, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8802, PETRI_PLACES=421, PETRI_TRANSITIONS=620} [2024-06-14 12:45:59,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 12:45:59,220 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 620 transitions, 8802 flow [2024-06-14 12:45:59,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:59,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:59,220 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] [2024-06-14 12:45:59,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:45:59,221 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)] === [2024-06-14 12:45:59,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash 380176499, now seen corresponding path program 6 times [2024-06-14 12:45:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:59,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563293310] [2024-06-14 12:45:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:59,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:59,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563293310] [2024-06-14 12:45:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563293310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:59,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:59,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:59,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190886220] [2024-06-14 12:45:59,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:59,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:45:59,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 620 transitions, 8802 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:59,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:59,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:45:59,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:01,675 INFO L124 PetriNetUnfolderBase]: 3930/6086 cut-off events. [2024-06-14 12:46:01,675 INFO L125 PetriNetUnfolderBase]: For 1585990/1585995 co-relation queries the response was YES. [2024-06-14 12:46:01,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68842 conditions, 6086 events. 3930/6086 cut-off events. For 1585990/1585995 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35111 event pairs, 711 based on Foata normal form. 2/6085 useless extension candidates. Maximal degree in co-relation 68645. Up to 5228 conditions per place. [2024-06-14 12:46:01,774 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 500 selfloop transitions, 140 changer transitions 0/644 dead transitions. [2024-06-14 12:46:01,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 644 transitions, 10532 flow [2024-06-14 12:46:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:46:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:46:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:46:01,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:46:01,775 INFO L175 Difference]: Start difference. First operand has 421 places, 620 transitions, 8802 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:46:01,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 644 transitions, 10532 flow [2024-06-14 12:46:08,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 644 transitions, 9907 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-14 12:46:08,598 INFO L231 Difference]: Finished difference. Result has 420 places, 623 transitions, 8555 flow [2024-06-14 12:46:08,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8199, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8555, PETRI_PLACES=420, PETRI_TRANSITIONS=623} [2024-06-14 12:46:08,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 12:46:08,598 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 623 transitions, 8555 flow [2024-06-14 12:46:08,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:08,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:08,599 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] [2024-06-14 12:46:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:46:08,599 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)] === [2024-06-14 12:46:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1848193604, now seen corresponding path program 2 times [2024-06-14 12:46:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365875136] [2024-06-14 12:46:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:09,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:09,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365875136] [2024-06-14 12:46:09,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365875136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:09,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:09,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060193322] [2024-06-14 12:46:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:09,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:09,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:09,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:46:09,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 623 transitions, 8555 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:09,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:09,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:46:09,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:11,092 INFO L124 PetriNetUnfolderBase]: 3940/6097 cut-off events. [2024-06-14 12:46:11,092 INFO L125 PetriNetUnfolderBase]: For 1605713/1605721 co-relation queries the response was YES. [2024-06-14 12:46:11,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68238 conditions, 6097 events. 3940/6097 cut-off events. For 1605713/1605721 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35145 event pairs, 678 based on Foata normal form. 6/6101 useless extension candidates. Maximal degree in co-relation 68043. Up to 5677 conditions per place. [2024-06-14 12:46:11,203 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 571 selfloop transitions, 70 changer transitions 0/645 dead transitions. [2024-06-14 12:46:11,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 645 transitions, 9984 flow [2024-06-14 12:46:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:46:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:46:11,217 INFO L175 Difference]: Start difference. First operand has 420 places, 623 transitions, 8555 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:46:11,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 645 transitions, 9984 flow [2024-06-14 12:46:17,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 645 transitions, 9741 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:46:17,140 INFO L231 Difference]: Finished difference. Result has 424 places, 627 transitions, 8560 flow [2024-06-14 12:46:17,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8312, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8560, PETRI_PLACES=424, PETRI_TRANSITIONS=627} [2024-06-14 12:46:17,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-14 12:46:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 627 transitions, 8560 flow [2024-06-14 12:46:17,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:17,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:17,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:17,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:46:17,141 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)] === [2024-06-14 12:46:17,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1547592352, now seen corresponding path program 3 times [2024-06-14 12:46:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:17,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066671400] [2024-06-14 12:46:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:18,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:18,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066671400] [2024-06-14 12:46:18,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066671400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:18,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590080436] [2024-06-14 12:46:18,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:46:18,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 627 transitions, 8560 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:18,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:18,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:46:18,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:19,802 INFO L124 PetriNetUnfolderBase]: 3950/6113 cut-off events. [2024-06-14 12:46:19,802 INFO L125 PetriNetUnfolderBase]: For 1624350/1624358 co-relation queries the response was YES. [2024-06-14 12:46:19,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68351 conditions, 6113 events. 3950/6113 cut-off events. For 1624350/1624358 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35287 event pairs, 684 based on Foata normal form. 6/6117 useless extension candidates. Maximal degree in co-relation 68155. Up to 5691 conditions per place. [2024-06-14 12:46:19,908 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 575 selfloop transitions, 70 changer transitions 0/649 dead transitions. [2024-06-14 12:46:19,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 649 transitions, 10005 flow [2024-06-14 12:46:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:46:19,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 12:46:19,909 INFO L175 Difference]: Start difference. First operand has 424 places, 627 transitions, 8560 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:46:19,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 649 transitions, 10005 flow [2024-06-14 12:46:26,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 649 transitions, 9798 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:26,664 INFO L231 Difference]: Finished difference. Result has 426 places, 631 transitions, 8609 flow [2024-06-14 12:46:26,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8353, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8609, PETRI_PLACES=426, PETRI_TRANSITIONS=631} [2024-06-14 12:46:26,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-14 12:46:26,665 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 631 transitions, 8609 flow [2024-06-14 12:46:26,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:26,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:26,665 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] [2024-06-14 12:46:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:46:26,665 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)] === [2024-06-14 12:46:26,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1547592135, now seen corresponding path program 4 times [2024-06-14 12:46:26,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:26,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785294306] [2024-06-14 12:46:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:26,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:27,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:27,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785294306] [2024-06-14 12:46:27,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785294306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:27,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:27,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:27,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997360626] [2024-06-14 12:46:27,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:27,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:27,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:27,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:27,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:46:27,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 631 transitions, 8609 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:27,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:27,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:46:27,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:29,219 INFO L124 PetriNetUnfolderBase]: 4158/6403 cut-off events. [2024-06-14 12:46:29,220 INFO L125 PetriNetUnfolderBase]: For 1920701/1920706 co-relation queries the response was YES. [2024-06-14 12:46:29,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75666 conditions, 6403 events. 4158/6403 cut-off events. For 1920701/1920706 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 36852 event pairs, 728 based on Foata normal form. 8/6408 useless extension candidates. Maximal degree in co-relation 75469. Up to 4991 conditions per place. [2024-06-14 12:46:29,368 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 483 selfloop transitions, 197 changer transitions 0/684 dead transitions. [2024-06-14 12:46:29,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 684 transitions, 11912 flow [2024-06-14 12:46:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:46:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 12:46:29,370 INFO L175 Difference]: Start difference. First operand has 426 places, 631 transitions, 8609 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:46:29,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 684 transitions, 11912 flow [2024-06-14 12:46:35,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 684 transitions, 11697 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:35,358 INFO L231 Difference]: Finished difference. Result has 429 places, 656 transitions, 9753 flow [2024-06-14 12:46:35,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8394, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9753, PETRI_PLACES=429, PETRI_TRANSITIONS=656} [2024-06-14 12:46:35,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-14 12:46:35,358 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 656 transitions, 9753 flow [2024-06-14 12:46:35,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:35,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:35,359 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] [2024-06-14 12:46:35,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:46:35,359 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)] === [2024-06-14 12:46:35,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:35,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1554943785, now seen corresponding path program 5 times [2024-06-14 12:46:35,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:35,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636583718] [2024-06-14 12:46:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:35,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:36,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636583718] [2024-06-14 12:46:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636583718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:36,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:36,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598650260] [2024-06-14 12:46:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:36,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:36,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:46:36,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 656 transitions, 9753 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:36,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:36,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:46:36,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:37,892 INFO L124 PetriNetUnfolderBase]: 4174/6436 cut-off events. [2024-06-14 12:46:37,893 INFO L125 PetriNetUnfolderBase]: For 1922305/1922310 co-relation queries the response was YES. [2024-06-14 12:46:37,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76943 conditions, 6436 events. 4174/6436 cut-off events. For 1922305/1922310 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 37203 event pairs, 712 based on Foata normal form. 8/6441 useless extension candidates. Maximal degree in co-relation 76744. Up to 5011 conditions per place. [2024-06-14 12:46:38,013 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 470 selfloop transitions, 213 changer transitions 0/687 dead transitions. [2024-06-14 12:46:38,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 687 transitions, 12305 flow [2024-06-14 12:46:38,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:46:38,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:46:38,014 INFO L175 Difference]: Start difference. First operand has 429 places, 656 transitions, 9753 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:46:38,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 687 transitions, 12305 flow [2024-06-14 12:46:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 687 transitions, 11782 flow, removed 220 selfloop flow, removed 3 redundant places. [2024-06-14 12:46:44,946 INFO L231 Difference]: Finished difference. Result has 436 places, 662 transitions, 9938 flow [2024-06-14 12:46:44,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9274, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9938, PETRI_PLACES=436, PETRI_TRANSITIONS=662} [2024-06-14 12:46:44,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 12:46:44,952 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 662 transitions, 9938 flow [2024-06-14 12:46:44,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:44,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:44,952 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] [2024-06-14 12:46:44,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:46:44,952 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)] === [2024-06-14 12:46:44,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1555210912, now seen corresponding path program 4 times [2024-06-14 12:46:44,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:44,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980282718] [2024-06-14 12:46:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:45,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:45,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980282718] [2024-06-14 12:46:45,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980282718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:45,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:45,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:45,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118834532] [2024-06-14 12:46:45,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:45,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:45,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:46:45,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 662 transitions, 9938 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:45,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:45,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:46:45,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:47,590 INFO L124 PetriNetUnfolderBase]: 4192/6460 cut-off events. [2024-06-14 12:46:47,591 INFO L125 PetriNetUnfolderBase]: For 1880356/1880361 co-relation queries the response was YES. [2024-06-14 12:46:47,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76692 conditions, 6460 events. 4192/6460 cut-off events. For 1880356/1880361 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 37342 event pairs, 707 based on Foata normal form. 2/6459 useless extension candidates. Maximal degree in co-relation 76490. Up to 5106 conditions per place. [2024-06-14 12:46:47,713 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 474 selfloop transitions, 216 changer transitions 0/694 dead transitions. [2024-06-14 12:46:47,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 694 transitions, 12551 flow [2024-06-14 12:46:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:46:47,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:46:47,715 INFO L175 Difference]: Start difference. First operand has 436 places, 662 transitions, 9938 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:46:47,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 694 transitions, 12551 flow [2024-06-14 12:46:53,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 694 transitions, 11916 flow, removed 119 selfloop flow, removed 7 redundant places. [2024-06-14 12:46:53,683 INFO L231 Difference]: Finished difference. Result has 439 places, 665 transitions, 9943 flow [2024-06-14 12:46:53,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9353, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9943, PETRI_PLACES=439, PETRI_TRANSITIONS=665} [2024-06-14 12:46:53,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 12:46:53,684 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 665 transitions, 9943 flow [2024-06-14 12:46:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:53,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:53,684 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] [2024-06-14 12:46:53,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:46:53,685 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)] === [2024-06-14 12:46:53,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 807546225, now seen corresponding path program 6 times [2024-06-14 12:46:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:53,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183871607] [2024-06-14 12:46:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:54,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:54,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183871607] [2024-06-14 12:46:54,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183871607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:54,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:54,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:54,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832055380] [2024-06-14 12:46:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:54,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:54,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:46:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 665 transitions, 9943 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:46:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:54,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:46:54,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:56,215 INFO L124 PetriNetUnfolderBase]: 4180/6444 cut-off events. [2024-06-14 12:46:56,215 INFO L125 PetriNetUnfolderBase]: For 1878008/1878013 co-relation queries the response was YES. [2024-06-14 12:46:56,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75182 conditions, 6444 events. 4180/6444 cut-off events. For 1878008/1878013 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 37234 event pairs, 724 based on Foata normal form. 4/6445 useless extension candidates. Maximal degree in co-relation 74979. Up to 5020 conditions per place. [2024-06-14 12:46:56,331 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 477 selfloop transitions, 210 changer transitions 0/691 dead transitions. [2024-06-14 12:46:56,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 691 transitions, 12073 flow [2024-06-14 12:46:56,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:46:56,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-14 12:46:56,332 INFO L175 Difference]: Start difference. First operand has 439 places, 665 transitions, 9943 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:46:56,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 691 transitions, 12073 flow [2024-06-14 12:47:04,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 691 transitions, 11499 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:04,420 INFO L231 Difference]: Finished difference. Result has 442 places, 667 transitions, 9884 flow [2024-06-14 12:47:04,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9370, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9884, PETRI_PLACES=442, PETRI_TRANSITIONS=667} [2024-06-14 12:47:04,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-14 12:47:04,421 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 667 transitions, 9884 flow [2024-06-14 12:47:04,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:47:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:04,421 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] [2024-06-14 12:47:04,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:47:04,422 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)] === [2024-06-14 12:47:04,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1554832557, now seen corresponding path program 2 times [2024-06-14 12:47:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095121960] [2024-06-14 12:47:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:05,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095121960] [2024-06-14 12:47:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095121960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:05,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:05,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:47:05,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444129720] [2024-06-14 12:47:05,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:05,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:47:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:47:05,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:47:05,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:47:05,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 667 transitions, 9884 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:05,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:05,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:47:05,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:07,452 INFO L124 PetriNetUnfolderBase]: 4415/6838 cut-off events. [2024-06-14 12:47:07,452 INFO L125 PetriNetUnfolderBase]: For 2436191/2436196 co-relation queries the response was YES. [2024-06-14 12:47:07,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79559 conditions, 6838 events. 4415/6838 cut-off events. For 2436191/2436196 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 40103 event pairs, 780 based on Foata normal form. 52/6887 useless extension candidates. Maximal degree in co-relation 79355. Up to 5359 conditions per place. [2024-06-14 12:47:07,584 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 512 selfloop transitions, 199 changer transitions 0/715 dead transitions. [2024-06-14 12:47:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 715 transitions, 12824 flow [2024-06-14 12:47:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:07,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 12:47:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-14 12:47:07,586 INFO L175 Difference]: Start difference. First operand has 442 places, 667 transitions, 9884 flow. Second operand 10 states and 178 transitions. [2024-06-14 12:47:07,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 715 transitions, 12824 flow [2024-06-14 12:47:14,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 715 transitions, 12329 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:14,009 INFO L231 Difference]: Finished difference. Result has 448 places, 682 transitions, 10346 flow [2024-06-14 12:47:14,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9408, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10346, PETRI_PLACES=448, PETRI_TRANSITIONS=682} [2024-06-14 12:47:14,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-14 12:47:14,010 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 682 transitions, 10346 flow [2024-06-14 12:47:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:14,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:14,010 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] [2024-06-14 12:47:14,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:47:14,010 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)] === [2024-06-14 12:47:14,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1544107797, now seen corresponding path program 3 times [2024-06-14 12:47:14,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:14,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314847921] [2024-06-14 12:47:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:15,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314847921] [2024-06-14 12:47:15,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314847921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:15,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:15,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:47:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315250037] [2024-06-14 12:47:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:15,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:47:15,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:47:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:47:15,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:47:15,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 682 transitions, 10346 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:15,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:15,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:47:15,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:17,538 INFO L124 PetriNetUnfolderBase]: 4624/7184 cut-off events. [2024-06-14 12:47:17,538 INFO L125 PetriNetUnfolderBase]: For 2531965/2531970 co-relation queries the response was YES. [2024-06-14 12:47:17,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83749 conditions, 7184 events. 4624/7184 cut-off events. For 2531965/2531970 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42598 event pairs, 863 based on Foata normal form. 52/7233 useless extension candidates. Maximal degree in co-relation 83542. Up to 5708 conditions per place. [2024-06-14 12:47:17,669 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 520 selfloop transitions, 198 changer transitions 0/722 dead transitions. [2024-06-14 12:47:17,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 722 transitions, 13176 flow [2024-06-14 12:47:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-14 12:47:17,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-14 12:47:17,670 INFO L175 Difference]: Start difference. First operand has 448 places, 682 transitions, 10346 flow. Second operand 10 states and 179 transitions. [2024-06-14 12:47:17,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 722 transitions, 13176 flow [2024-06-14 12:47:24,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 722 transitions, 12642 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:24,971 INFO L231 Difference]: Finished difference. Result has 453 places, 689 transitions, 10542 flow [2024-06-14 12:47:24,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9818, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10542, PETRI_PLACES=453, PETRI_TRANSITIONS=689} [2024-06-14 12:47:24,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-14 12:47:24,972 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 689 transitions, 10542 flow [2024-06-14 12:47:24,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:24,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:24,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:24,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:47:24,973 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)] === [2024-06-14 12:47:24,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:24,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1555220367, now seen corresponding path program 4 times [2024-06-14 12:47:24,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:24,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480702625] [2024-06-14 12:47:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:24,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:25,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:25,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480702625] [2024-06-14 12:47:25,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480702625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:25,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:25,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:47:25,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130585999] [2024-06-14 12:47:25,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:25,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:47:25,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:25,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:47:25,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:47:26,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:47:26,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 689 transitions, 10542 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:26,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:26,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:47:26,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:28,459 INFO L124 PetriNetUnfolderBase]: 5125/8025 cut-off events. [2024-06-14 12:47:28,459 INFO L125 PetriNetUnfolderBase]: For 3177254/3177259 co-relation queries the response was YES. [2024-06-14 12:47:28,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101408 conditions, 8025 events. 5125/8025 cut-off events. For 3177254/3177259 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 48770 event pairs, 977 based on Foata normal form. 42/8064 useless extension candidates. Maximal degree in co-relation 101199. Up to 4705 conditions per place. [2024-06-14 12:47:28,624 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 497 selfloop transitions, 234 changer transitions 0/735 dead transitions. [2024-06-14 12:47:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 735 transitions, 13920 flow [2024-06-14 12:47:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:47:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:47:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:47:28,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-14 12:47:28,626 INFO L175 Difference]: Start difference. First operand has 453 places, 689 transitions, 10542 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:47:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 735 transitions, 13920 flow [2024-06-14 12:47:36,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 735 transitions, 13503 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-14 12:47:36,980 INFO L231 Difference]: Finished difference. Result has 459 places, 693 transitions, 10925 flow [2024-06-14 12:47:36,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10125, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10925, PETRI_PLACES=459, PETRI_TRANSITIONS=693} [2024-06-14 12:47:36,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-14 12:47:36,997 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 693 transitions, 10925 flow [2024-06-14 12:47:36,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:36,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:36,997 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] [2024-06-14 12:47:36,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:47:36,997 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)] === [2024-06-14 12:47:36,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1847930259, now seen corresponding path program 5 times [2024-06-14 12:47:36,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:36,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527416953] [2024-06-14 12:47:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:38,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:38,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527416953] [2024-06-14 12:47:38,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527416953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:38,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:38,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:47:38,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791171377] [2024-06-14 12:47:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:47:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:47:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:47:38,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:47:38,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 693 transitions, 10925 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:38,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:38,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:47:38,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:41,015 INFO L124 PetriNetUnfolderBase]: 5185/8123 cut-off events. [2024-06-14 12:47:41,015 INFO L125 PetriNetUnfolderBase]: For 3020449/3020457 co-relation queries the response was YES. [2024-06-14 12:47:41,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102069 conditions, 8123 events. 5185/8123 cut-off events. For 3020449/3020457 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 49867 event pairs, 1088 based on Foata normal form. 32/8153 useless extension candidates. Maximal degree in co-relation 101858. Up to 7387 conditions per place. [2024-06-14 12:47:41,189 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 608 selfloop transitions, 109 changer transitions 0/721 dead transitions. [2024-06-14 12:47:41,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 721 transitions, 13010 flow [2024-06-14 12:47:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:47:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:47:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 12:47:41,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38802660753880264 [2024-06-14 12:47:41,199 INFO L175 Difference]: Start difference. First operand has 459 places, 693 transitions, 10925 flow. Second operand 11 states and 175 transitions. [2024-06-14 12:47:41,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 721 transitions, 13010 flow [2024-06-14 12:47:47,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 721 transitions, 12585 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 12:47:47,983 INFO L231 Difference]: Finished difference. Result has 464 places, 696 transitions, 10961 flow [2024-06-14 12:47:47,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10504, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10961, PETRI_PLACES=464, PETRI_TRANSITIONS=696} [2024-06-14 12:47:47,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 12:47:47,983 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 696 transitions, 10961 flow [2024-06-14 12:47:47,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 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) [2024-06-14 12:47:47,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:47,984 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] [2024-06-14 12:47:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:47:47,984 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)] === [2024-06-14 12:47:47,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1046854607, now seen corresponding path program 7 times [2024-06-14 12:47:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:47,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288597973] [2024-06-14 12:47:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:48,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:48,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288597973] [2024-06-14 12:47:48,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288597973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:48,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:48,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:47:48,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786837664] [2024-06-14 12:47:48,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:48,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:47:48,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:47:48,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:47:48,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:47:48,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 696 transitions, 10961 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:47:48,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:48,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:47:48,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:47:51,659 INFO L124 PetriNetUnfolderBase]: 5201/8149 cut-off events. [2024-06-14 12:47:51,659 INFO L125 PetriNetUnfolderBase]: For 2785704/2785712 co-relation queries the response was YES. [2024-06-14 12:47:51,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102175 conditions, 8149 events. 5201/8149 cut-off events. For 2785704/2785712 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 50063 event pairs, 1135 based on Foata normal form. 8/8155 useless extension candidates. Maximal degree in co-relation 101962. Up to 7848 conditions per place. [2024-06-14 12:47:51,803 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 660 selfloop transitions, 48 changer transitions 0/712 dead transitions. [2024-06-14 12:47:51,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 712 transitions, 12615 flow [2024-06-14 12:47:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:47:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:47:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 12:47:51,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685636856368564 [2024-06-14 12:47:51,805 INFO L175 Difference]: Start difference. First operand has 464 places, 696 transitions, 10961 flow. Second operand 9 states and 136 transitions. [2024-06-14 12:47:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 712 transitions, 12615 flow [2024-06-14 12:47:58,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 712 transitions, 12277 flow, removed 64 selfloop flow, removed 10 redundant places. [2024-06-14 12:47:58,561 INFO L231 Difference]: Finished difference. Result has 463 places, 699 transitions, 10935 flow [2024-06-14 12:47:58,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10623, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10935, PETRI_PLACES=463, PETRI_TRANSITIONS=699} [2024-06-14 12:47:58,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-14 12:47:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 699 transitions, 10935 flow [2024-06-14 12:47:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:47:58,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:47:58,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:47:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:47:58,562 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)] === [2024-06-14 12:47:58,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:47:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1624568275, now seen corresponding path program 8 times [2024-06-14 12:47:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:47:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739962168] [2024-06-14 12:47:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:47:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:47:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:47:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:47:59,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:47:59,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739962168] [2024-06-14 12:47:59,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739962168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:47:59,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:47:59,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:47:59,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145679708] [2024-06-14 12:47:59,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:47:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:47:59,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:47:59,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:47:59,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:47:59,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:47:59,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 699 transitions, 10935 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:47:59,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:47:59,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:47:59,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:02,416 INFO L124 PetriNetUnfolderBase]: 5217/8176 cut-off events. [2024-06-14 12:48:02,416 INFO L125 PetriNetUnfolderBase]: For 2757356/2757364 co-relation queries the response was YES. [2024-06-14 12:48:02,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101087 conditions, 8176 events. 5217/8176 cut-off events. For 2757356/2757364 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 50290 event pairs, 1113 based on Foata normal form. 8/8173 useless extension candidates. Maximal degree in co-relation 100874. Up to 7576 conditions per place. [2024-06-14 12:48:02,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 119 changer transitions 0/716 dead transitions. [2024-06-14 12:48:02,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 716 transitions, 12609 flow [2024-06-14 12:48:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:48:02,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 12:48:02,560 INFO L175 Difference]: Start difference. First operand has 463 places, 699 transitions, 10935 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:48:02,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 716 transitions, 12609 flow [2024-06-14 12:48:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 716 transitions, 12315 flow, removed 101 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:10,502 INFO L231 Difference]: Finished difference. Result has 465 places, 702 transitions, 11101 flow [2024-06-14 12:48:10,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10641, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11101, PETRI_PLACES=465, PETRI_TRANSITIONS=702} [2024-06-14 12:48:10,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 12:48:10,503 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 702 transitions, 11101 flow [2024-06-14 12:48:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:10,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:10,503 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] [2024-06-14 12:48:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:48:10,504 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)] === [2024-06-14 12:48:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1635293035, now seen corresponding path program 9 times [2024-06-14 12:48:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:10,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386682026] [2024-06-14 12:48:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:11,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386682026] [2024-06-14 12:48:11,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386682026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:11,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:11,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:11,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064922430] [2024-06-14 12:48:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:11,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:48:11,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 702 transitions, 11101 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:11,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:11,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:48:11,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:14,238 INFO L124 PetriNetUnfolderBase]: 5233/8200 cut-off events. [2024-06-14 12:48:14,239 INFO L125 PetriNetUnfolderBase]: For 2792964/2792972 co-relation queries the response was YES. [2024-06-14 12:48:14,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101733 conditions, 8200 events. 5233/8200 cut-off events. For 2792964/2792972 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 50419 event pairs, 1115 based on Foata normal form. 8/8197 useless extension candidates. Maximal degree in co-relation 101519. Up to 7600 conditions per place. [2024-06-14 12:48:14,380 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 588 selfloop transitions, 127 changer transitions 0/719 dead transitions. [2024-06-14 12:48:14,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 719 transitions, 12787 flow [2024-06-14 12:48:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:48:14,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 12:48:14,382 INFO L175 Difference]: Start difference. First operand has 465 places, 702 transitions, 11101 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:48:14,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 719 transitions, 12787 flow [2024-06-14 12:48:21,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 719 transitions, 12349 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:21,853 INFO L231 Difference]: Finished difference. Result has 467 places, 705 transitions, 11145 flow [2024-06-14 12:48:21,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10663, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11145, PETRI_PLACES=467, PETRI_TRANSITIONS=705} [2024-06-14 12:48:21,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 12:48:21,854 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 705 transitions, 11145 flow [2024-06-14 12:48:21,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:21,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:21,854 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] [2024-06-14 12:48:21,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:48:21,854 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)] === [2024-06-14 12:48:21,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:21,855 INFO L85 PathProgramCache]: Analyzing trace with hash 526305951, now seen corresponding path program 10 times [2024-06-14 12:48:21,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:21,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104726635] [2024-06-14 12:48:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:21,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104726635] [2024-06-14 12:48:22,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104726635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:22,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:22,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663284794] [2024-06-14 12:48:22,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:22,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:22,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:48:22,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 705 transitions, 11145 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:22,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:22,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:48:22,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:25,500 INFO L124 PetriNetUnfolderBase]: 5236/8205 cut-off events. [2024-06-14 12:48:25,500 INFO L125 PetriNetUnfolderBase]: For 2806962/2806970 co-relation queries the response was YES. [2024-06-14 12:48:25,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101431 conditions, 8205 events. 5236/8205 cut-off events. For 2806962/2806970 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 50537 event pairs, 1114 based on Foata normal form. 8/8202 useless extension candidates. Maximal degree in co-relation 101216. Up to 7553 conditions per place. [2024-06-14 12:48:25,805 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 581 selfloop transitions, 138 changer transitions 0/723 dead transitions. [2024-06-14 12:48:25,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 723 transitions, 12847 flow [2024-06-14 12:48:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:48:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:48:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:48:25,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:48:25,807 INFO L175 Difference]: Start difference. First operand has 467 places, 705 transitions, 11145 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:48:25,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 723 transitions, 12847 flow [2024-06-14 12:48:31,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 723 transitions, 12387 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:31,979 INFO L231 Difference]: Finished difference. Result has 469 places, 708 transitions, 11195 flow [2024-06-14 12:48:31,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10685, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11195, PETRI_PLACES=469, PETRI_TRANSITIONS=708} [2024-06-14 12:48:31,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-14 12:48:31,979 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 708 transitions, 11195 flow [2024-06-14 12:48:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:31,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:31,980 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] [2024-06-14 12:48:31,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:48:31,980 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)] === [2024-06-14 12:48:31,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:31,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1687360106, now seen corresponding path program 2 times [2024-06-14 12:48:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:31,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672822394] [2024-06-14 12:48:31,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:31,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:32,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672822394] [2024-06-14 12:48:32,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672822394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:32,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:32,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:32,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905893545] [2024-06-14 12:48:32,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:32,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:33,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:48:33,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 708 transitions, 11195 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:33,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:33,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:48:33,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:35,893 INFO L124 PetriNetUnfolderBase]: 5241/8195 cut-off events. [2024-06-14 12:48:35,894 INFO L125 PetriNetUnfolderBase]: For 2798601/2798603 co-relation queries the response was YES. [2024-06-14 12:48:36,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101414 conditions, 8195 events. 5241/8195 cut-off events. For 2798601/2798603 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 50347 event pairs, 1121 based on Foata normal form. 1/8185 useless extension candidates. Maximal degree in co-relation 101198. Up to 7524 conditions per place. [2024-06-14 12:48:36,054 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 630 selfloop transitions, 100 changer transitions 0/734 dead transitions. [2024-06-14 12:48:36,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 734 transitions, 12834 flow [2024-06-14 12:48:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:48:36,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:48:36,056 INFO L175 Difference]: Start difference. First operand has 469 places, 708 transitions, 11195 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:48:36,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 734 transitions, 12834 flow [2024-06-14 12:48:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 734 transitions, 12346 flow, removed 108 selfloop flow, removed 7 redundant places. [2024-06-14 12:48:43,962 INFO L231 Difference]: Finished difference. Result has 470 places, 711 transitions, 11014 flow [2024-06-14 12:48:43,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10707, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11014, PETRI_PLACES=470, PETRI_TRANSITIONS=711} [2024-06-14 12:48:43,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-14 12:48:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 711 transitions, 11014 flow [2024-06-14 12:48:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:43,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:43,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:48:43,964 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)] === [2024-06-14 12:48:43,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:43,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1134414871, now seen corresponding path program 7 times [2024-06-14 12:48:43,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:43,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557095825] [2024-06-14 12:48:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:43,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:44,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557095825] [2024-06-14 12:48:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557095825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:48:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093290138] [2024-06-14 12:48:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:44,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:48:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:48:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:48:44,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:48:44,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 711 transitions, 11014 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:44,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:44,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:48:44,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:47,529 INFO L124 PetriNetUnfolderBase]: 5243/8214 cut-off events. [2024-06-14 12:48:47,530 INFO L125 PetriNetUnfolderBase]: For 2825040/2825048 co-relation queries the response was YES. [2024-06-14 12:48:47,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101041 conditions, 8214 events. 5243/8214 cut-off events. For 2825040/2825048 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 50557 event pairs, 1146 based on Foata normal form. 6/8207 useless extension candidates. Maximal degree in co-relation 100824. Up to 7532 conditions per place. [2024-06-14 12:48:47,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 642 selfloop transitions, 95 changer transitions 0/741 dead transitions. [2024-06-14 12:48:47,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 741 transitions, 12733 flow [2024-06-14 12:48:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:48:47,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 12:48:47,827 INFO L175 Difference]: Start difference. First operand has 470 places, 711 transitions, 11014 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:48:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 741 transitions, 12733 flow [2024-06-14 12:48:54,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 741 transitions, 12483 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:48:54,908 INFO L231 Difference]: Finished difference. Result has 473 places, 719 transitions, 11140 flow [2024-06-14 12:48:54,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10772, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11140, PETRI_PLACES=473, PETRI_TRANSITIONS=719} [2024-06-14 12:48:54,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-14 12:48:54,909 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 719 transitions, 11140 flow [2024-06-14 12:48:54,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:54,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:54,910 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] [2024-06-14 12:48:54,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:48:54,910 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)] === [2024-06-14 12:48:54,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash -60128544, now seen corresponding path program 3 times [2024-06-14 12:48:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106218743] [2024-06-14 12:48:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:55,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:55,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106218743] [2024-06-14 12:48:55,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106218743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:55,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:55,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:48:55,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863184724] [2024-06-14 12:48:55,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:55,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:48:55,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:48:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:48:56,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:48:56,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 719 transitions, 11140 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:48:56,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:56,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:48:56,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:59,269 INFO L124 PetriNetUnfolderBase]: 5240/8192 cut-off events. [2024-06-14 12:48:59,269 INFO L125 PetriNetUnfolderBase]: For 2838685/2838687 co-relation queries the response was YES. [2024-06-14 12:48:59,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101531 conditions, 8192 events. 5240/8192 cut-off events. For 2838685/2838687 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 50364 event pairs, 1108 based on Foata normal form. 1/8180 useless extension candidates. Maximal degree in co-relation 101312. Up to 7523 conditions per place. [2024-06-14 12:48:59,417 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 632 selfloop transitions, 106 changer transitions 0/742 dead transitions. [2024-06-14 12:48:59,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 742 transitions, 12702 flow [2024-06-14 12:48:59,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:48:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:48:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:48:59,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 12:48:59,419 INFO L175 Difference]: Start difference. First operand has 473 places, 719 transitions, 11140 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:48:59,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 742 transitions, 12702 flow [2024-06-14 12:49:08,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 742 transitions, 12505 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:49:08,250 INFO L231 Difference]: Finished difference. Result has 477 places, 719 transitions, 11167 flow [2024-06-14 12:49:08,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10943, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11167, PETRI_PLACES=477, PETRI_TRANSITIONS=719} [2024-06-14 12:49:08,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 12:49:08,251 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 719 transitions, 11167 flow [2024-06-14 12:49:08,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:08,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:08,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:49:08,251 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)] === [2024-06-14 12:49:08,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1241936803, now seen corresponding path program 7 times [2024-06-14 12:49:08,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:08,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804608437] [2024-06-14 12:49:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:08,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:08,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804608437] [2024-06-14 12:49:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804608437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:08,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:08,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:08,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394250671] [2024-06-14 12:49:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:08,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:09,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:49:09,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 719 transitions, 11167 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:09,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:09,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:49:09,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:11,677 INFO L124 PetriNetUnfolderBase]: 5250/8209 cut-off events. [2024-06-14 12:49:11,677 INFO L125 PetriNetUnfolderBase]: For 2887555/2887557 co-relation queries the response was YES. [2024-06-14 12:49:11,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102000 conditions, 8209 events. 5250/8209 cut-off events. For 2887555/2887557 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50469 event pairs, 1123 based on Foata normal form. 2/8198 useless extension candidates. Maximal degree in co-relation 101779. Up to 7534 conditions per place. [2024-06-14 12:49:11,827 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 637 selfloop transitions, 105 changer transitions 0/746 dead transitions. [2024-06-14 12:49:11,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 746 transitions, 12865 flow [2024-06-14 12:49:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:49:11,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 12:49:11,829 INFO L175 Difference]: Start difference. First operand has 477 places, 719 transitions, 11167 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:49:11,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 746 transitions, 12865 flow [2024-06-14 12:49:20,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 746 transitions, 12622 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:20,489 INFO L231 Difference]: Finished difference. Result has 479 places, 722 transitions, 11264 flow [2024-06-14 12:49:20,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10924, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11264, PETRI_PLACES=479, PETRI_TRANSITIONS=722} [2024-06-14 12:49:20,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-14 12:49:20,489 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 722 transitions, 11264 flow [2024-06-14 12:49:20,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:20,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:20,490 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] [2024-06-14 12:49:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:49:20,490 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)] === [2024-06-14 12:49:20,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:20,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1821983923, now seen corresponding path program 8 times [2024-06-14 12:49:20,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:20,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672134295] [2024-06-14 12:49:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:20,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:21,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672134295] [2024-06-14 12:49:21,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672134295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:21,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:21,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:21,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061861426] [2024-06-14 12:49:21,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:21,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:21,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:49:21,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 722 transitions, 11264 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:21,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:21,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:49:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:23,995 INFO L124 PetriNetUnfolderBase]: 5260/8219 cut-off events. [2024-06-14 12:49:23,995 INFO L125 PetriNetUnfolderBase]: For 2924789/2924791 co-relation queries the response was YES. [2024-06-14 12:49:24,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102463 conditions, 8219 events. 5260/8219 cut-off events. For 2924789/2924791 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50485 event pairs, 1113 based on Foata normal form. 2/8209 useless extension candidates. Maximal degree in co-relation 102241. Up to 7548 conditions per place. [2024-06-14 12:49:24,148 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 637 selfloop transitions, 109 changer transitions 0/750 dead transitions. [2024-06-14 12:49:24,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 750 transitions, 12980 flow [2024-06-14 12:49:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:49:24,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:49:24,149 INFO L175 Difference]: Start difference. First operand has 479 places, 722 transitions, 11264 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:49:24,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 750 transitions, 12980 flow [2024-06-14 12:49:32,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 750 transitions, 12682 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:32,487 INFO L231 Difference]: Finished difference. Result has 481 places, 725 transitions, 11320 flow [2024-06-14 12:49:32,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10966, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11320, PETRI_PLACES=481, PETRI_TRANSITIONS=725} [2024-06-14 12:49:32,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 12:49:32,487 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 725 transitions, 11320 flow [2024-06-14 12:49:32,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:32,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:32,487 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] [2024-06-14 12:49:32,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:49:32,488 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)] === [2024-06-14 12:49:32,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2089821908, now seen corresponding path program 4 times [2024-06-14 12:49:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:32,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644575422] [2024-06-14 12:49:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:33,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:33,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644575422] [2024-06-14 12:49:33,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644575422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:33,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:33,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:33,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931173589] [2024-06-14 12:49:33,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:33,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:33,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:33,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:33,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:33,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:49:33,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 725 transitions, 11320 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:33,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:33,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:49:33,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:36,422 INFO L124 PetriNetUnfolderBase]: 5257/8210 cut-off events. [2024-06-14 12:49:36,422 INFO L125 PetriNetUnfolderBase]: For 2936318/2936320 co-relation queries the response was YES. [2024-06-14 12:49:36,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102407 conditions, 8210 events. 5257/8210 cut-off events. For 2936318/2936320 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 50414 event pairs, 1093 based on Foata normal form. 1/8200 useless extension candidates. Maximal degree in co-relation 102184. Up to 7480 conditions per place. [2024-06-14 12:49:36,578 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 612 selfloop transitions, 130 changer transitions 0/746 dead transitions. [2024-06-14 12:49:36,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 746 transitions, 12890 flow [2024-06-14 12:49:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:49:36,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 12:49:36,579 INFO L175 Difference]: Start difference. First operand has 481 places, 725 transitions, 11320 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:49:36,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 746 transitions, 12890 flow [2024-06-14 12:49:44,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 746 transitions, 12530 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:44,964 INFO L231 Difference]: Finished difference. Result has 482 places, 725 transitions, 11230 flow [2024-06-14 12:49:44,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10960, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11230, PETRI_PLACES=482, PETRI_TRANSITIONS=725} [2024-06-14 12:49:44,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-14 12:49:44,965 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 725 transitions, 11230 flow [2024-06-14 12:49:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:44,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:44,965 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] [2024-06-14 12:49:44,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:49:44,966 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)] === [2024-06-14 12:49:44,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -944259781, now seen corresponding path program 9 times [2024-06-14 12:49:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406862159] [2024-06-14 12:49:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:45,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:45,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406862159] [2024-06-14 12:49:45,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406862159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:45,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:45,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17288983] [2024-06-14 12:49:45,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:45,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:45,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:45,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:45,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:49:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 725 transitions, 11230 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:49:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:48,801 INFO L124 PetriNetUnfolderBase]: 5265/8232 cut-off events. [2024-06-14 12:49:48,802 INFO L125 PetriNetUnfolderBase]: For 2988510/2988512 co-relation queries the response was YES. [2024-06-14 12:49:48,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102406 conditions, 8232 events. 5265/8232 cut-off events. For 2988510/2988512 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50629 event pairs, 1116 based on Foata normal form. 4/8223 useless extension candidates. Maximal degree in co-relation 102182. Up to 7458 conditions per place. [2024-06-14 12:49:48,986 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 618 selfloop transitions, 134 changer transitions 0/756 dead transitions. [2024-06-14 12:49:48,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 756 transitions, 13452 flow [2024-06-14 12:49:48,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:49:48,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 12:49:48,988 INFO L175 Difference]: Start difference. First operand has 482 places, 725 transitions, 11230 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:49:48,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 756 transitions, 13452 flow [2024-06-14 12:49:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 756 transitions, 13156 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:49:58,839 INFO L231 Difference]: Finished difference. Result has 485 places, 733 transitions, 11547 flow [2024-06-14 12:49:58,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10934, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11547, PETRI_PLACES=485, PETRI_TRANSITIONS=733} [2024-06-14 12:49:58,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 12:49:58,839 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 733 transitions, 11547 flow [2024-06-14 12:49:58,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:58,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:58,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:58,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:49:58,840 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)] === [2024-06-14 12:49:58,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash -678306232, now seen corresponding path program 5 times [2024-06-14 12:49:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:58,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806441006] [2024-06-14 12:49:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:59,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:59,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806441006] [2024-06-14 12:49:59,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806441006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:59,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:59,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:59,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750122088] [2024-06-14 12:49:59,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:59,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:49:59,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 733 transitions, 11547 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-14 12:49:59,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:59,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:49:59,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:02,695 INFO L124 PetriNetUnfolderBase]: 5244/8198 cut-off events. [2024-06-14 12:50:02,695 INFO L125 PetriNetUnfolderBase]: For 2974662/2974664 co-relation queries the response was YES. [2024-06-14 12:50:02,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101782 conditions, 8198 events. 5244/8198 cut-off events. For 2974662/2974664 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50441 event pairs, 1111 based on Foata normal form. 3/8188 useless extension candidates. Maximal degree in co-relation 101556. Up to 7436 conditions per place. [2024-06-14 12:50:02,897 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 618 selfloop transitions, 134 changer transitions 0/756 dead transitions. [2024-06-14 12:50:02,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 756 transitions, 13467 flow [2024-06-14 12:50:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:50:02,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:50:02,899 INFO L175 Difference]: Start difference. First operand has 485 places, 733 transitions, 11547 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:50:02,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 756 transitions, 13467 flow