./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:50:48,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:50:48,601 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:50:48,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:50:48,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:50:48,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:50:48,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:50:48,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:50:48,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:50:48,630 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:50:48,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:50:48,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:50:48,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:50:48,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:50:48,633 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:50:48,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:50:48,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:50:48,634 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:50:48,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:50:48,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:50:48,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:50:48,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:50:48,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:50:48,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:50:48,635 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:50:48,635 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:50:48,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:50:48,636 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:50:48,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:50:48,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:50:48,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:50:48,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:50:48,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:50:48,638 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:50:48,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:50:48,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:50:48,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:50:48,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:50:48,639 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:50:48,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:50:48,639 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:50:48,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:50:48,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:50:48,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:50:48,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:50:48,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:50:48,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:50:48,831 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:50:48,831 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:50:48,832 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-14 12:50:49,749 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:50:49,966 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:50:49,976 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-14 12:50:49,996 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdfea052f/10f8947ae6c5474c85938c8acf46f19d/FLAG42ca36047 [2024-06-14 12:50:50,006 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdfea052f/10f8947ae6c5474c85938c8acf46f19d [2024-06-14 12:50:50,008 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:50:50,008 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:50:50,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe001_power.opt_pso.oepc_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:50:50,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:50:50,159 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:50:50,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:50:50,160 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:50:50,163 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:50:50,164 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:50:50" (1/2) ... [2024-06-14 12:50:50,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a85cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:50:50, skipping insertion in model container [2024-06-14 12:50:50,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:50:50" (1/2) ... [2024-06-14 12:50:50,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f67ea09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:50:50, skipping insertion in model container [2024-06-14 12:50:50,166 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:50:50" (2/2) ... [2024-06-14 12:50:50,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a85cb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:50:50, skipping insertion in model container [2024-06-14 12:50:50,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:50:50" (2/2) ... [2024-06-14 12:50:50,167 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:50:50,229 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:50:50,230 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:50:50,230 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:50:50,230 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 12:50:50,231 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:50:50,231 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-14 12:50:50,268 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:50:50,542 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:50:50,549 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:50:50,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:50:50,686 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:50:50,687 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:50:50 WrapperNode [2024-06-14 12:50:50,687 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:50:50,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:50:50,688 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:50:50,688 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:50:50,693 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,705 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,732 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 12:50:50,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:50:50,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:50:50,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:50:50,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:50:50,745 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,745 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,748 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,777 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 12:50:50,778 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,778 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,789 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,795 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,798 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,806 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:50:50,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:50:50,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:50:50,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:50:50,813 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 12:50:50" (1/1) ... [2024-06-14 12:50:50,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:50:50,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:50:50,837 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 12:50:50,856 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 12:50:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:50:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:50:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:50:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:50:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:50:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:50:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:50:50,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:50:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:50:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:50:50,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:50:50,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:50:50,872 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 12:50:50,972 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:50:50,974 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:50:51,334 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:50:51,336 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:50:51,464 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:50:51,465 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:50:51,465 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:50:51 BoogieIcfgContainer [2024-06-14 12:50:51,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:50:51,468 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:50:51,468 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:50:51,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:50:51,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:50:50" (1/4) ... [2024-06-14 12:50:51,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d1e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:50:51, skipping insertion in model container [2024-06-14 12:50:51,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:50:50" (2/4) ... [2024-06-14 12:50:51,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d1e25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:50:51, skipping insertion in model container [2024-06-14 12:50:51,472 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 12:50:50" (3/4) ... [2024-06-14 12:50:51,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1d1e25 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:50:51, skipping insertion in model container [2024-06-14 12:50:51,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:50:51" (4/4) ... [2024-06-14 12:50:51,474 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.opt_pso.oepc_pso.opt_rmo.opt.i [2024-06-14 12:50:51,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:50:51,486 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:50:51,487 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:50:51,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:50:51,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:50:51,586 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:50:51,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:50:51,588 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 63 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 12:50:51,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:50:51,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:50:51,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:50:51,612 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;@7e227f21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:50:51,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:50:51,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:50:51,617 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:50:51,617 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:50:51,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:51,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:50:51,618 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 12:50:51,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1456369184, now seen corresponding path program 1 times [2024-06-14 12:50:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975533695] [2024-06-14 12:50:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:52,565 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 12:50:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975533695] [2024-06-14 12:50:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975533695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:52,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:52,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:50:52,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196542337] [2024-06-14 12:50:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:52,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:50:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:50:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:50:52,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 12:50:52,634 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 12:50:52,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:52,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 12:50:52,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:52,950 INFO L124 PetriNetUnfolderBase]: 1152/1747 cut-off events. [2024-06-14 12:50:52,950 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:50:52,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3566 conditions, 1747 events. 1152/1747 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7996 event pairs, 785 based on Foata normal form. 1/1711 useless extension candidates. Maximal degree in co-relation 3551. Up to 1732 conditions per place. [2024-06-14 12:50:52,963 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 12:50:52,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-14 12:50:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:50:52,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:50:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-14 12:50:52,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 12:50:52,973 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 70 transitions. [2024-06-14 12:50:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-14 12:50:52,976 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 12:50:52,978 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:50:52,980 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 12:50:52,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:50:52,983 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:50:52,983 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 12:50:52,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:52,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:52,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:50:52,984 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 12:50:52,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:52,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1065920051, now seen corresponding path program 1 times [2024-06-14 12:50:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564657163] [2024-06-14 12:50:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:53,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:53,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564657163] [2024-06-14 12:50:53,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564657163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:53,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:53,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:50:53,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628208656] [2024-06-14 12:50:53,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:53,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:50:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:50:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:50:53,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:53,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 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 12:50:53,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:53,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:53,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:53,957 INFO L124 PetriNetUnfolderBase]: 1389/2095 cut-off events. [2024-06-14 12:50:53,958 INFO L125 PetriNetUnfolderBase]: For 402/426 co-relation queries the response was YES. [2024-06-14 12:50:53,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 2095 events. 1389/2095 cut-off events. For 402/426 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9475 event pairs, 621 based on Foata normal form. 13/2101 useless extension candidates. Maximal degree in co-relation 4816. Up to 2033 conditions per place. [2024-06-14 12:50:53,968 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:50:53,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 250 flow [2024-06-14 12:50:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:50:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:50:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-14 12:50:53,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 12:50:53,971 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-06-14 12:50:53,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 250 flow [2024-06-14 12:50:53,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:50:53,974 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-14 12:50:53,974 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 12:50:53,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-14 12:50:53,975 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-14 12:50:53,975 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 12:50:53,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:53,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:53,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:50:53,978 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 12:50:53,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash 677389008, now seen corresponding path program 1 times [2024-06-14 12:50:53,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:53,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52447490] [2024-06-14 12:50:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:53,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:54,999 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 12:50:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52447490] [2024-06-14 12:50:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52447490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:50:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426994916] [2024-06-14 12:50:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:50:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:50:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:50:55,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:55,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:55,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:55,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:55,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:55,377 INFO L124 PetriNetUnfolderBase]: 1380/2080 cut-off events. [2024-06-14 12:50:55,377 INFO L125 PetriNetUnfolderBase]: For 1134/1173 co-relation queries the response was YES. [2024-06-14 12:50:55,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5322 conditions, 2080 events. 1380/2080 cut-off events. For 1134/1173 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9400 event pairs, 481 based on Foata normal form. 18/2091 useless extension candidates. Maximal degree in co-relation 5305. Up to 1988 conditions per place. [2024-06-14 12:50:55,386 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-14 12:50:55,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 306 flow [2024-06-14 12:50:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:50:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:50:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-14 12:50:55,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-14 12:50:55,389 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 104 transitions. [2024-06-14 12:50:55,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 306 flow [2024-06-14 12:50:55,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 292 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:50:55,391 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 157 flow [2024-06-14 12:50:55,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-06-14 12:50:55,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-14 12:50:55,392 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 157 flow [2024-06-14 12:50:55,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:55,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:55,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:50:55,392 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1906018500, now seen corresponding path program 1 times [2024-06-14 12:50:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869878608] [2024-06-14 12:50:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:55,973 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 12:50:55,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:55,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869878608] [2024-06-14 12:50:55,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869878608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:55,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:55,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:50:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270445077] [2024-06-14 12:50:55,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:55,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:50:55,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:50:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:50:56,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 12:50:56,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 157 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 12:50:56,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:56,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 12:50:56,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:56,314 INFO L124 PetriNetUnfolderBase]: 1126/1707 cut-off events. [2024-06-14 12:50:56,315 INFO L125 PetriNetUnfolderBase]: For 1636/1639 co-relation queries the response was YES. [2024-06-14 12:50:56,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4745 conditions, 1707 events. 1126/1707 cut-off events. For 1636/1639 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7642 event pairs, 594 based on Foata normal form. 4/1707 useless extension candidates. Maximal degree in co-relation 4727. Up to 1683 conditions per place. [2024-06-14 12:50:56,321 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-14 12:50:56,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 295 flow [2024-06-14 12:50:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:50:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:50:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:50:56,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:50:56,324 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 157 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:50:56,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 295 flow [2024-06-14 12:50:56,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 272 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:50:56,328 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 178 flow [2024-06-14 12:50:56,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 12:50:56,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-14 12:50:56,330 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 178 flow [2024-06-14 12:50:56,330 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 12:50:56,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:56,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:56,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:50:56,330 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 12:50:56,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:56,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1081397346, now seen corresponding path program 1 times [2024-06-14 12:50:56,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:56,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419316339] [2024-06-14 12:50:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:57,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419316339] [2024-06-14 12:50:57,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419316339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:57,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:57,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:50:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848118711] [2024-06-14 12:50:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:50:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:50:57,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:50:57,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:57,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:57,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:57,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:57,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:57,387 INFO L124 PetriNetUnfolderBase]: 1594/2384 cut-off events. [2024-06-14 12:50:57,387 INFO L125 PetriNetUnfolderBase]: For 3233/3233 co-relation queries the response was YES. [2024-06-14 12:50:57,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6966 conditions, 2384 events. 1594/2384 cut-off events. For 3233/3233 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10778 event pairs, 784 based on Foata normal form. 2/2384 useless extension candidates. Maximal degree in co-relation 6946. Up to 2353 conditions per place. [2024-06-14 12:50:57,398 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-14 12:50:57,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 368 flow [2024-06-14 12:50:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:50:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:50:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:50:57,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:50:57,400 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 178 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:50:57,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 368 flow [2024-06-14 12:50:57,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 346 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:50:57,403 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 230 flow [2024-06-14 12:50:57,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-14 12:50:57,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-14 12:50:57,404 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 230 flow [2024-06-14 12:50:57,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:57,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:57,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:57,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:50:57,404 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 12:50:57,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:57,405 INFO L85 PathProgramCache]: Analyzing trace with hash 836422361, now seen corresponding path program 1 times [2024-06-14 12:50:57,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:57,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884796757] [2024-06-14 12:50:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:57,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884796757] [2024-06-14 12:50:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884796757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:58,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:58,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:50:58,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454339371] [2024-06-14 12:50:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:58,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:50:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:50:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:50:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:50:58,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:58,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:58,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:50:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:58,707 INFO L124 PetriNetUnfolderBase]: 1589/2377 cut-off events. [2024-06-14 12:50:58,708 INFO L125 PetriNetUnfolderBase]: For 4362/4362 co-relation queries the response was YES. [2024-06-14 12:50:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7533 conditions, 2377 events. 1589/2377 cut-off events. For 4362/4362 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10730 event pairs, 766 based on Foata normal form. 2/2377 useless extension candidates. Maximal degree in co-relation 7510. Up to 2337 conditions per place. [2024-06-14 12:50:58,720 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2024-06-14 12:50:58,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 428 flow [2024-06-14 12:50:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:50:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:50:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:50:58,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 12:50:58,722 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 230 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:50:58,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 428 flow [2024-06-14 12:50:58,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:50:58,725 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 280 flow [2024-06-14 12:50:58,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-14 12:50:58,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:50:58,726 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 280 flow [2024-06-14 12:50:58,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:58,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:58,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:58,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:50:58,727 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 12:50:58,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash -18206589, now seen corresponding path program 1 times [2024-06-14 12:50:58,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:58,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804297361] [2024-06-14 12:50:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:58,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:59,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:59,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804297361] [2024-06-14 12:50:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804297361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:59,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:59,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:50:59,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168043356] [2024-06-14 12:50:59,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:59,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:50:59,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:59,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:50:59,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:50:59,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:50:59,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 280 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 12:50:59,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:59,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:50:59,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:59,746 INFO L124 PetriNetUnfolderBase]: 1575/2372 cut-off events. [2024-06-14 12:50:59,746 INFO L125 PetriNetUnfolderBase]: For 6774/6861 co-relation queries the response was YES. [2024-06-14 12:50:59,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8270 conditions, 2372 events. 1575/2372 cut-off events. For 6774/6861 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10913 event pairs, 573 based on Foata normal form. 27/2344 useless extension candidates. Maximal degree in co-relation 8244. Up to 2240 conditions per place. [2024-06-14 12:50:59,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-14 12:50:59,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 506 flow [2024-06-14 12:50:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:50:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:50:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:50:59,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:50:59,769 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 280 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:50:59,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 506 flow [2024-06-14 12:50:59,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 478 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:50:59,773 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 330 flow [2024-06-14 12:50:59,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 12:50:59,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 12:50:59,775 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 330 flow [2024-06-14 12:50:59,775 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 12:50:59,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:59,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:50:59,775 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 12:50:59,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1588017951, now seen corresponding path program 1 times [2024-06-14 12:50:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:59,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690344094] [2024-06-14 12:50:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:00,470 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 12:51:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:00,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690344094] [2024-06-14 12:51:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690344094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:00,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083311527] [2024-06-14 12:51:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:00,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:00,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:00,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:00,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:00,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:00,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:00,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:00,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:00,981 INFO L124 PetriNetUnfolderBase]: 1763/2624 cut-off events. [2024-06-14 12:51:00,981 INFO L125 PetriNetUnfolderBase]: For 8132/8141 co-relation queries the response was YES. [2024-06-14 12:51:00,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9726 conditions, 2624 events. 1763/2624 cut-off events. For 8132/8141 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11977 event pairs, 536 based on Foata normal form. 14/2635 useless extension candidates. Maximal degree in co-relation 9698. Up to 2466 conditions per place. [2024-06-14 12:51:00,995 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 68 selfloop transitions, 30 changer transitions 0/101 dead transitions. [2024-06-14 12:51:00,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 101 transitions, 716 flow [2024-06-14 12:51:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:51:00,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 12:51:00,998 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 330 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:51:00,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 101 transitions, 716 flow [2024-06-14 12:51:01,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 691 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:51:01,004 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 531 flow [2024-06-14 12:51:01,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2024-06-14 12:51:01,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-14 12:51:01,006 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 531 flow [2024-06-14 12:51:01,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:01,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:01,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:01,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:51:01,007 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 12:51:01,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:01,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1588017765, now seen corresponding path program 2 times [2024-06-14 12:51:01,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:01,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487736456] [2024-06-14 12:51:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:01,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:01,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:01,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487736456] [2024-06-14 12:51:01,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487736456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:01,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:01,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508259123] [2024-06-14 12:51:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:01,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:51:01,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 531 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 12:51:01,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:01,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:51:01,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:02,098 INFO L124 PetriNetUnfolderBase]: 1721/2580 cut-off events. [2024-06-14 12:51:02,098 INFO L125 PetriNetUnfolderBase]: For 12914/13019 co-relation queries the response was YES. [2024-06-14 12:51:02,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11190 conditions, 2580 events. 1721/2580 cut-off events. For 12914/13019 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11827 event pairs, 574 based on Foata normal form. 27/2555 useless extension candidates. Maximal degree in co-relation 11158. Up to 2347 conditions per place. [2024-06-14 12:51:02,109 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 25 changer transitions 0/106 dead transitions. [2024-06-14 12:51:02,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 878 flow [2024-06-14 12:51:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:51:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:51:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:51:02,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:51:02,110 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 531 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:51:02,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 878 flow [2024-06-14 12:51:02,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 849 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 12:51:02,118 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 623 flow [2024-06-14 12:51:02,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=623, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2024-06-14 12:51:02,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 12:51:02,118 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 623 flow [2024-06-14 12:51:02,119 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 12:51:02,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:02,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:02,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:51:02,119 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 12:51:02,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 159282237, now seen corresponding path program 2 times [2024-06-14 12:51:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:02,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49222059] [2024-06-14 12:51:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:02,762 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 12:51:02,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:02,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49222059] [2024-06-14 12:51:02,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49222059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:02,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:02,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:02,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723181778] [2024-06-14 12:51:02,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:02,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:02,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:02,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 623 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:02,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:02,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:02,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:03,211 INFO L124 PetriNetUnfolderBase]: 1782/2652 cut-off events. [2024-06-14 12:51:03,211 INFO L125 PetriNetUnfolderBase]: For 14476/14485 co-relation queries the response was YES. [2024-06-14 12:51:03,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12015 conditions, 2652 events. 1782/2652 cut-off events. For 14476/14485 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11996 event pairs, 615 based on Foata normal form. 8/2657 useless extension candidates. Maximal degree in co-relation 11981. Up to 2557 conditions per place. [2024-06-14 12:51:03,223 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 27 changer transitions 0/122 dead transitions. [2024-06-14 12:51:03,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 1091 flow [2024-06-14 12:51:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:51:03,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 12:51:03,225 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 623 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:51:03,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 1091 flow [2024-06-14 12:51:03,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 1061 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:51:03,237 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 847 flow [2024-06-14 12:51:03,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=847, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-06-14 12:51:03,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 12:51:03,241 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 847 flow [2024-06-14 12:51:03,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:03,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:03,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:51:03,242 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 12:51:03,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash 159045087, now seen corresponding path program 3 times [2024-06-14 12:51:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:03,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326565132] [2024-06-14 12:51:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:03,933 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 12:51:03,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:03,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326565132] [2024-06-14 12:51:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326565132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:03,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:03,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:03,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738795500] [2024-06-14 12:51:03,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:03,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:03,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:03,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:04,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:04,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 847 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:04,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:04,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:04,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:04,497 INFO L124 PetriNetUnfolderBase]: 1833/2723 cut-off events. [2024-06-14 12:51:04,498 INFO L125 PetriNetUnfolderBase]: For 17991/18005 co-relation queries the response was YES. [2024-06-14 12:51:04,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13089 conditions, 2723 events. 1833/2723 cut-off events. For 17991/18005 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12330 event pairs, 617 based on Foata normal form. 15/2735 useless extension candidates. Maximal degree in co-relation 13050. Up to 2598 conditions per place. [2024-06-14 12:51:04,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 99 selfloop transitions, 35 changer transitions 0/137 dead transitions. [2024-06-14 12:51:04,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 137 transitions, 1309 flow [2024-06-14 12:51:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:51:04,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:51:04,516 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 847 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:51:04,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 137 transitions, 1309 flow [2024-06-14 12:51:04,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 1265 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 12:51:04,582 INFO L231 Difference]: Finished difference. Result has 90 places, 114 transitions, 1035 flow [2024-06-14 12:51:04,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=90, PETRI_TRANSITIONS=114} [2024-06-14 12:51:04,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-14 12:51:04,583 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 114 transitions, 1035 flow [2024-06-14 12:51:04,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:04,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:04,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:04,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:51:04,584 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 12:51:04,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 159291165, now seen corresponding path program 1 times [2024-06-14 12:51:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139749585] [2024-06-14 12:51:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:05,449 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 12:51:05,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:05,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139749585] [2024-06-14 12:51:05,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139749585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:05,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:05,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:05,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552725099] [2024-06-14 12:51:05,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:05,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:05,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:05,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:05,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 114 transitions, 1035 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:05,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:05,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:05,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:05,977 INFO L124 PetriNetUnfolderBase]: 1825/2709 cut-off events. [2024-06-14 12:51:05,977 INFO L125 PetriNetUnfolderBase]: For 22176/22176 co-relation queries the response was YES. [2024-06-14 12:51:05,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14029 conditions, 2709 events. 1825/2709 cut-off events. For 22176/22176 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12205 event pairs, 592 based on Foata normal form. 4/2711 useless extension candidates. Maximal degree in co-relation 13985. Up to 2651 conditions per place. [2024-06-14 12:51:05,993 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 16 changer transitions 0/140 dead transitions. [2024-06-14 12:51:05,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 1391 flow [2024-06-14 12:51:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:51:05,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:51:05,995 INFO L175 Difference]: Start difference. First operand has 90 places, 114 transitions, 1035 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:51:05,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 1391 flow [2024-06-14 12:51:06,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1310 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:06,015 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 1019 flow [2024-06-14 12:51:06,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1019, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-14 12:51:06,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:51:06,016 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 1019 flow [2024-06-14 12:51:06,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:06,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:06,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:51:06,017 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 12:51:06,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash -564492936, now seen corresponding path program 1 times [2024-06-14 12:51:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:06,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731802214] [2024-06-14 12:51:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:06,800 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 12:51:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731802214] [2024-06-14 12:51:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731802214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:06,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:06,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:06,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612846514] [2024-06-14 12:51:06,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:06,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:06,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:51:06,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 1019 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:06,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:06,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:51:06,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:07,321 INFO L124 PetriNetUnfolderBase]: 1739/2601 cut-off events. [2024-06-14 12:51:07,321 INFO L125 PetriNetUnfolderBase]: For 24840/24956 co-relation queries the response was YES. [2024-06-14 12:51:07,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13774 conditions, 2601 events. 1739/2601 cut-off events. For 24840/24956 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11757 event pairs, 570 based on Foata normal form. 53/2625 useless extension candidates. Maximal degree in co-relation 13728. Up to 2438 conditions per place. [2024-06-14 12:51:07,337 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 101 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-06-14 12:51:07,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 135 transitions, 1309 flow [2024-06-14 12:51:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:51:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:51:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:51:07,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-14 12:51:07,339 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 1019 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:51:07,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 135 transitions, 1309 flow [2024-06-14 12:51:07,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 135 transitions, 1254 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:07,360 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 1014 flow [2024-06-14 12:51:07,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1014, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-14 12:51:07,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 12:51:07,361 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 1014 flow [2024-06-14 12:51:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:07,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:07,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:51:07,362 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:07,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1980193077, now seen corresponding path program 1 times [2024-06-14 12:51:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:07,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328449577] [2024-06-14 12:51:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:08,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:08,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328449577] [2024-06-14 12:51:08,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328449577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:08,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:08,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455994510] [2024-06-14 12:51:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:08,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:08,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:08,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 1014 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:08,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:08,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:08,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:08,772 INFO L124 PetriNetUnfolderBase]: 1999/2955 cut-off events. [2024-06-14 12:51:08,772 INFO L125 PetriNetUnfolderBase]: For 29603/29617 co-relation queries the response was YES. [2024-06-14 12:51:08,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15795 conditions, 2955 events. 1999/2955 cut-off events. For 29603/29617 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13521 event pairs, 548 based on Foata normal form. 20/2972 useless extension candidates. Maximal degree in co-relation 15748. Up to 2686 conditions per place. [2024-06-14 12:51:08,791 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 132 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-14 12:51:08,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 173 transitions, 1755 flow [2024-06-14 12:51:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:51:08,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 12:51:08,793 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 1014 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:51:08,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 173 transitions, 1755 flow [2024-06-14 12:51:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 173 transitions, 1691 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:08,816 INFO L231 Difference]: Finished difference. Result has 102 places, 137 transitions, 1292 flow [2024-06-14 12:51:08,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1292, PETRI_PLACES=102, PETRI_TRANSITIONS=137} [2024-06-14 12:51:08,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 12:51:08,817 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 137 transitions, 1292 flow [2024-06-14 12:51:08,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:08,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:08,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:51:08,818 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 12:51:08,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:08,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1983912147, now seen corresponding path program 2 times [2024-06-14 12:51:08,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:08,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773413273] [2024-06-14 12:51:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:09,474 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 12:51:09,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:09,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773413273] [2024-06-14 12:51:09,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773413273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:09,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:09,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:09,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534327697] [2024-06-14 12:51:09,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:09,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:09,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:09,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:09,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 137 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:09,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:09,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:09,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:10,224 INFO L124 PetriNetUnfolderBase]: 2536/3708 cut-off events. [2024-06-14 12:51:10,224 INFO L125 PetriNetUnfolderBase]: For 46467/46476 co-relation queries the response was YES. [2024-06-14 12:51:10,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22179 conditions, 3708 events. 2536/3708 cut-off events. For 46467/46476 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17347 event pairs, 573 based on Foata normal form. 12/3717 useless extension candidates. Maximal degree in co-relation 22128. Up to 2725 conditions per place. [2024-06-14 12:51:10,249 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 132 selfloop transitions, 65 changer transitions 0/200 dead transitions. [2024-06-14 12:51:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 200 transitions, 2278 flow [2024-06-14 12:51:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:51:10,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:51:10,251 INFO L175 Difference]: Start difference. First operand has 102 places, 137 transitions, 1292 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:51:10,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 200 transitions, 2278 flow [2024-06-14 12:51:10,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 200 transitions, 2172 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:10,297 INFO L231 Difference]: Finished difference. Result has 109 places, 158 transitions, 1652 flow [2024-06-14 12:51:10,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1652, PETRI_PLACES=109, PETRI_TRANSITIONS=158} [2024-06-14 12:51:10,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 12:51:10,298 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 158 transitions, 1652 flow [2024-06-14 12:51:10,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:10,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:10,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:10,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:51:10,299 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 12:51:10,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1983917944, now seen corresponding path program 1 times [2024-06-14 12:51:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129875585] [2024-06-14 12:51:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129875585] [2024-06-14 12:51:11,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129875585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:11,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:11,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971917021] [2024-06-14 12:51:11,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:11,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:11,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:11,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 158 transitions, 1652 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:11,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:11,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:11,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:11,815 INFO L124 PetriNetUnfolderBase]: 2623/3833 cut-off events. [2024-06-14 12:51:11,816 INFO L125 PetriNetUnfolderBase]: For 57967/57978 co-relation queries the response was YES. [2024-06-14 12:51:11,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25151 conditions, 3833 events. 2623/3833 cut-off events. For 57967/57978 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17983 event pairs, 538 based on Foata normal form. 22/3852 useless extension candidates. Maximal degree in co-relation 25096. Up to 2945 conditions per place. [2024-06-14 12:51:11,838 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 128 selfloop transitions, 91 changer transitions 0/222 dead transitions. [2024-06-14 12:51:11,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 222 transitions, 2779 flow [2024-06-14 12:51:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:51:11,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:51:11,841 INFO L175 Difference]: Start difference. First operand has 109 places, 158 transitions, 1652 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:51:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 222 transitions, 2779 flow [2024-06-14 12:51:11,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 222 transitions, 2608 flow, removed 79 selfloop flow, removed 2 redundant places. [2024-06-14 12:51:11,893 INFO L231 Difference]: Finished difference. Result has 116 places, 184 transitions, 2154 flow [2024-06-14 12:51:11,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2154, PETRI_PLACES=116, PETRI_TRANSITIONS=184} [2024-06-14 12:51:11,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 12:51:11,893 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 184 transitions, 2154 flow [2024-06-14 12:51:11,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:11,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:11,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:11,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:51:11,894 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 12:51:11,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1983917727, now seen corresponding path program 3 times [2024-06-14 12:51:11,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:11,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973678166] [2024-06-14 12:51:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:11,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:12,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:12,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973678166] [2024-06-14 12:51:12,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973678166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:12,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:12,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:12,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104481677] [2024-06-14 12:51:12,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:12,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:12,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:12,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:12,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:12,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 184 transitions, 2154 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:12,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:13,331 INFO L124 PetriNetUnfolderBase]: 2610/3817 cut-off events. [2024-06-14 12:51:13,331 INFO L125 PetriNetUnfolderBase]: For 61732/61743 co-relation queries the response was YES. [2024-06-14 12:51:13,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25920 conditions, 3817 events. 2610/3817 cut-off events. For 61732/61743 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17975 event pairs, 539 based on Foata normal form. 24/3838 useless extension candidates. Maximal degree in co-relation 25861. Up to 2792 conditions per place. [2024-06-14 12:51:13,358 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 126 selfloop transitions, 97 changer transitions 0/226 dead transitions. [2024-06-14 12:51:13,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 226 transitions, 2958 flow [2024-06-14 12:51:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:51:13,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-14 12:51:13,359 INFO L175 Difference]: Start difference. First operand has 116 places, 184 transitions, 2154 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:51:13,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 226 transitions, 2958 flow [2024-06-14 12:51:13,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2853 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:13,444 INFO L231 Difference]: Finished difference. Result has 122 places, 190 transitions, 2402 flow [2024-06-14 12:51:13,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2402, PETRI_PLACES=122, PETRI_TRANSITIONS=190} [2024-06-14 12:51:13,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 12:51:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 190 transitions, 2402 flow [2024-06-14 12:51:13,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:13,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:13,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:51:13,445 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 12:51:13,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 642783553, now seen corresponding path program 4 times [2024-06-14 12:51:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:13,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063585793] [2024-06-14 12:51:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:14,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063585793] [2024-06-14 12:51:14,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063585793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:14,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:14,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:14,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225501737] [2024-06-14 12:51:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:14,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:14,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 190 transitions, 2402 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:14,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:14,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:14,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:14,788 INFO L124 PetriNetUnfolderBase]: 2708/3960 cut-off events. [2024-06-14 12:51:14,788 INFO L125 PetriNetUnfolderBase]: For 69877/69888 co-relation queries the response was YES. [2024-06-14 12:51:14,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27935 conditions, 3960 events. 2708/3960 cut-off events. For 69877/69888 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18590 event pairs, 658 based on Foata normal form. 12/3969 useless extension candidates. Maximal degree in co-relation 27873. Up to 3441 conditions per place. [2024-06-14 12:51:14,818 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 195 selfloop transitions, 62 changer transitions 0/260 dead transitions. [2024-06-14 12:51:14,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 260 transitions, 3673 flow [2024-06-14 12:51:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:51:14,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:51:14,820 INFO L175 Difference]: Start difference. First operand has 122 places, 190 transitions, 2402 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:51:14,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 260 transitions, 3673 flow [2024-06-14 12:51:14,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 260 transitions, 3490 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:14,953 INFO L231 Difference]: Finished difference. Result has 130 places, 221 transitions, 2902 flow [2024-06-14 12:51:14,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2902, PETRI_PLACES=130, PETRI_TRANSITIONS=221} [2024-06-14 12:51:14,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 12:51:14,954 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 221 transitions, 2902 flow [2024-06-14 12:51:14,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:14,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:14,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:14,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:51:14,954 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 12:51:14,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:14,955 INFO L85 PathProgramCache]: Analyzing trace with hash -416585364, now seen corresponding path program 2 times [2024-06-14 12:51:14,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:14,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194559362] [2024-06-14 12:51:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:14,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194559362] [2024-06-14 12:51:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194559362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:15,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:15,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053022057] [2024-06-14 12:51:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:15,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:15,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 221 transitions, 2902 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:15,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:15,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:15,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:16,378 INFO L124 PetriNetUnfolderBase]: 2709/3962 cut-off events. [2024-06-14 12:51:16,378 INFO L125 PetriNetUnfolderBase]: For 76457/76468 co-relation queries the response was YES. [2024-06-14 12:51:16,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28789 conditions, 3962 events. 2709/3962 cut-off events. For 76457/76468 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18573 event pairs, 624 based on Foata normal form. 10/3969 useless extension candidates. Maximal degree in co-relation 28722. Up to 3615 conditions per place. [2024-06-14 12:51:16,408 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 59 changer transitions 0/263 dead transitions. [2024-06-14 12:51:16,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 263 transitions, 3782 flow [2024-06-14 12:51:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:51:16,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:51:16,409 INFO L175 Difference]: Start difference. First operand has 130 places, 221 transitions, 2902 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:51:16,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 263 transitions, 3782 flow [2024-06-14 12:51:16,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 263 transitions, 3618 flow, removed 81 selfloop flow, removed 1 redundant places. [2024-06-14 12:51:16,505 INFO L231 Difference]: Finished difference. Result has 139 places, 233 transitions, 3122 flow [2024-06-14 12:51:16,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3122, PETRI_PLACES=139, PETRI_TRANSITIONS=233} [2024-06-14 12:51:16,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-14 12:51:16,506 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 233 transitions, 3122 flow [2024-06-14 12:51:16,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:16,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:16,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:51:16,507 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 12:51:16,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash 643050680, now seen corresponding path program 3 times [2024-06-14 12:51:16,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:16,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335579228] [2024-06-14 12:51:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:17,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:17,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335579228] [2024-06-14 12:51:17,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335579228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:17,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:17,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:17,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618113127] [2024-06-14 12:51:17,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:17,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:17,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:17,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 233 transitions, 3122 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:17,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:17,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:17,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:18,161 INFO L124 PetriNetUnfolderBase]: 2698/3943 cut-off events. [2024-06-14 12:51:18,161 INFO L125 PetriNetUnfolderBase]: For 80530/80541 co-relation queries the response was YES. [2024-06-14 12:51:18,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29175 conditions, 3943 events. 2698/3943 cut-off events. For 80530/80541 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18438 event pairs, 655 based on Foata normal form. 10/3950 useless extension candidates. Maximal degree in co-relation 29103. Up to 3803 conditions per place. [2024-06-14 12:51:18,191 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 41 changer transitions 0/266 dead transitions. [2024-06-14 12:51:18,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 266 transitions, 3905 flow [2024-06-14 12:51:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:51:18,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:51:18,193 INFO L175 Difference]: Start difference. First operand has 139 places, 233 transitions, 3122 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:51:18,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 266 transitions, 3905 flow [2024-06-14 12:51:18,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 266 transitions, 3761 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:18,360 INFO L231 Difference]: Finished difference. Result has 143 places, 241 transitions, 3219 flow [2024-06-14 12:51:18,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3219, PETRI_PLACES=143, PETRI_TRANSITIONS=241} [2024-06-14 12:51:18,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 12:51:18,360 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 241 transitions, 3219 flow [2024-06-14 12:51:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:18,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:18,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:18,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:51:18,361 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:18,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash 635426323, now seen corresponding path program 5 times [2024-06-14 12:51:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762006046] [2024-06-14 12:51:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762006046] [2024-06-14 12:51:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762006046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:19,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:19,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764789353] [2024-06-14 12:51:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:19,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:19,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:19,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 241 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:19,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:19,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:19,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:19,965 INFO L124 PetriNetUnfolderBase]: 3000/4366 cut-off events. [2024-06-14 12:51:19,965 INFO L125 PetriNetUnfolderBase]: For 98178/98189 co-relation queries the response was YES. [2024-06-14 12:51:19,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32822 conditions, 4366 events. 3000/4366 cut-off events. For 98178/98189 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20686 event pairs, 657 based on Foata normal form. 14/4377 useless extension candidates. Maximal degree in co-relation 32749. Up to 3711 conditions per place. [2024-06-14 12:51:19,999 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 218 selfloop transitions, 87 changer transitions 0/308 dead transitions. [2024-06-14 12:51:20,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 308 transitions, 4503 flow [2024-06-14 12:51:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 12:51:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-14 12:51:20,003 INFO L175 Difference]: Start difference. First operand has 143 places, 241 transitions, 3219 flow. Second operand 10 states and 184 transitions. [2024-06-14 12:51:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 308 transitions, 4503 flow [2024-06-14 12:51:20,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 308 transitions, 4403 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:20,133 INFO L231 Difference]: Finished difference. Result has 149 places, 263 transitions, 3690 flow [2024-06-14 12:51:20,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3690, PETRI_PLACES=149, PETRI_TRANSITIONS=263} [2024-06-14 12:51:20,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 12:51:20,133 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 263 transitions, 3690 flow [2024-06-14 12:51:20,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:20,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:20,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:51:20,134 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 12:51:20,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash 635432120, now seen corresponding path program 4 times [2024-06-14 12:51:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:20,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70509616] [2024-06-14 12:51:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:21,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:21,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70509616] [2024-06-14 12:51:21,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70509616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:21,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:21,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:21,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393352038] [2024-06-14 12:51:21,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:21,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:21,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:21,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 263 transitions, 3690 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:21,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:21,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:21,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:21,966 INFO L124 PetriNetUnfolderBase]: 3006/4373 cut-off events. [2024-06-14 12:51:21,966 INFO L125 PetriNetUnfolderBase]: For 108973/108984 co-relation queries the response was YES. [2024-06-14 12:51:21,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34498 conditions, 4373 events. 3006/4373 cut-off events. For 108973/108984 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20745 event pairs, 738 based on Foata normal form. 13/4383 useless extension candidates. Maximal degree in co-relation 34422. Up to 4225 conditions per place. [2024-06-14 12:51:22,007 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 250 selfloop transitions, 42 changer transitions 0/295 dead transitions. [2024-06-14 12:51:22,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 295 transitions, 4472 flow [2024-06-14 12:51:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:51:22,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 12:51:22,009 INFO L175 Difference]: Start difference. First operand has 149 places, 263 transitions, 3690 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:51:22,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 295 transitions, 4472 flow [2024-06-14 12:51:22,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 295 transitions, 4207 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:22,183 INFO L231 Difference]: Finished difference. Result has 155 places, 267 transitions, 3606 flow [2024-06-14 12:51:22,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3606, PETRI_PLACES=155, PETRI_TRANSITIONS=267} [2024-06-14 12:51:22,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 12:51:22,184 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 267 transitions, 3606 flow [2024-06-14 12:51:22,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:22,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:22,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:22,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:51:22,185 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 12:51:22,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash 635431903, now seen corresponding path program 6 times [2024-06-14 12:51:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:22,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522596788] [2024-06-14 12:51:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:22,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:22,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:22,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522596788] [2024-06-14 12:51:22,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522596788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:22,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:22,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:22,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029857863] [2024-06-14 12:51:22,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:22,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:22,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:22,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:22,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:22,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:22,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 267 transitions, 3606 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:22,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:22,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:22,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:23,730 INFO L124 PetriNetUnfolderBase]: 3062/4455 cut-off events. [2024-06-14 12:51:23,730 INFO L125 PetriNetUnfolderBase]: For 113013/113024 co-relation queries the response was YES. [2024-06-14 12:51:23,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34249 conditions, 4455 events. 3062/4455 cut-off events. For 113013/113024 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21173 event pairs, 641 based on Foata normal form. 24/4476 useless extension candidates. Maximal degree in co-relation 34171. Up to 3760 conditions per place. [2024-06-14 12:51:23,831 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 213 selfloop transitions, 95 changer transitions 0/311 dead transitions. [2024-06-14 12:51:23,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 311 transitions, 4604 flow [2024-06-14 12:51:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:51:23,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 12:51:23,832 INFO L175 Difference]: Start difference. First operand has 155 places, 267 transitions, 3606 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:51:23,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 311 transitions, 4604 flow [2024-06-14 12:51:23,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 311 transitions, 4487 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:23,968 INFO L231 Difference]: Finished difference. Result has 157 places, 276 transitions, 3838 flow [2024-06-14 12:51:23,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3838, PETRI_PLACES=157, PETRI_TRANSITIONS=276} [2024-06-14 12:51:23,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-14 12:51:23,969 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 276 transitions, 3838 flow [2024-06-14 12:51:23,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:23,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:23,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:23,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:51:23,969 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:23,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:23,970 INFO L85 PathProgramCache]: Analyzing trace with hash -923011563, now seen corresponding path program 1 times [2024-06-14 12:51:23,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:23,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548538764] [2024-06-14 12:51:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:23,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:24,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548538764] [2024-06-14 12:51:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548538764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:51:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461366316] [2024-06-14 12:51:24,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:24,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:51:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:51:24,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:51:24,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:24,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 276 transitions, 3838 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 12:51:24,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:24,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:24,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:25,426 INFO L124 PetriNetUnfolderBase]: 3050/4437 cut-off events. [2024-06-14 12:51:25,427 INFO L125 PetriNetUnfolderBase]: For 114819/114830 co-relation queries the response was YES. [2024-06-14 12:51:25,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34852 conditions, 4437 events. 3050/4437 cut-off events. For 114819/114830 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 21175 event pairs, 725 based on Foata normal form. 12/4446 useless extension candidates. Maximal degree in co-relation 34773. Up to 4387 conditions per place. [2024-06-14 12:51:25,459 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 268 selfloop transitions, 15 changer transitions 0/286 dead transitions. [2024-06-14 12:51:25,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 286 transitions, 4451 flow [2024-06-14 12:51:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:51:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:51:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-14 12:51:25,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:51:25,460 INFO L175 Difference]: Start difference. First operand has 157 places, 276 transitions, 3838 flow. Second operand 5 states and 82 transitions. [2024-06-14 12:51:25,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 286 transitions, 4451 flow [2024-06-14 12:51:25,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 286 transitions, 4279 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:25,592 INFO L231 Difference]: Finished difference. Result has 158 places, 278 transitions, 3737 flow [2024-06-14 12:51:25,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3737, PETRI_PLACES=158, PETRI_TRANSITIONS=278} [2024-06-14 12:51:25,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 12:51:25,593 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 278 transitions, 3737 flow [2024-06-14 12:51:25,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 12:51:25,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:25,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:25,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:51:25,593 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:25,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1253583042, now seen corresponding path program 1 times [2024-06-14 12:51:25,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:25,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730889526] [2024-06-14 12:51:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730889526] [2024-06-14 12:51:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730889526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421176821] [2024-06-14 12:51:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:26,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:51:26,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 278 transitions, 3737 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 12:51:26,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:26,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:51:26,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:27,583 INFO L124 PetriNetUnfolderBase]: 3099/4536 cut-off events. [2024-06-14 12:51:27,583 INFO L125 PetriNetUnfolderBase]: For 127691/127769 co-relation queries the response was YES. [2024-06-14 12:51:27,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35727 conditions, 4536 events. 3099/4536 cut-off events. For 127691/127769 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21967 event pairs, 685 based on Foata normal form. 12/4496 useless extension candidates. Maximal degree in co-relation 35646. Up to 4252 conditions per place. [2024-06-14 12:51:27,625 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 260 selfloop transitions, 45 changer transitions 0/342 dead transitions. [2024-06-14 12:51:27,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 342 transitions, 4899 flow [2024-06-14 12:51:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:51:27,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 12:51:27,626 INFO L175 Difference]: Start difference. First operand has 158 places, 278 transitions, 3737 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:51:27,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 342 transitions, 4899 flow [2024-06-14 12:51:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 342 transitions, 4849 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:27,804 INFO L231 Difference]: Finished difference. Result has 167 places, 307 transitions, 4288 flow [2024-06-14 12:51:27,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3699, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4288, PETRI_PLACES=167, PETRI_TRANSITIONS=307} [2024-06-14 12:51:27,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-14 12:51:27,804 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 307 transitions, 4288 flow [2024-06-14 12:51:27,804 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 12:51:27,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:27,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:27,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:51:27,805 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:27,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1925942740, now seen corresponding path program 2 times [2024-06-14 12:51:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:27,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578487517] [2024-06-14 12:51:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:28,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578487517] [2024-06-14 12:51:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578487517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:28,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965229789] [2024-06-14 12:51:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:28,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:28,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:51:28,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 307 transitions, 4288 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 12:51:28,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:28,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:51:28,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:29,511 INFO L124 PetriNetUnfolderBase]: 3113/4560 cut-off events. [2024-06-14 12:51:29,511 INFO L125 PetriNetUnfolderBase]: For 137081/137187 co-relation queries the response was YES. [2024-06-14 12:51:29,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36643 conditions, 4560 events. 3113/4560 cut-off events. For 137081/137187 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22078 event pairs, 555 based on Foata normal form. 38/4537 useless extension candidates. Maximal degree in co-relation 36558. Up to 4209 conditions per place. [2024-06-14 12:51:29,553 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 250 selfloop transitions, 47 changer transitions 0/334 dead transitions. [2024-06-14 12:51:29,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 334 transitions, 5018 flow [2024-06-14 12:51:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:51:29,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-14 12:51:29,555 INFO L175 Difference]: Start difference. First operand has 167 places, 307 transitions, 4288 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:51:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 334 transitions, 5018 flow [2024-06-14 12:51:29,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 334 transitions, 4931 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:29,727 INFO L231 Difference]: Finished difference. Result has 171 places, 309 transitions, 4365 flow [2024-06-14 12:51:29,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4365, PETRI_PLACES=171, PETRI_TRANSITIONS=309} [2024-06-14 12:51:29,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 12:51:29,728 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 309 transitions, 4365 flow [2024-06-14 12:51:29,728 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 12:51:29,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:29,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:51:29,728 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:29,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1456157340, now seen corresponding path program 3 times [2024-06-14 12:51:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836888406] [2024-06-14 12:51:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:30,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:30,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836888406] [2024-06-14 12:51:30,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836888406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:30,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:30,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202357161] [2024-06-14 12:51:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:30,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:51:30,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 309 transitions, 4365 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 12:51:30,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:30,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:51:30,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:31,493 INFO L124 PetriNetUnfolderBase]: 3134/4593 cut-off events. [2024-06-14 12:51:31,493 INFO L125 PetriNetUnfolderBase]: For 147626/147751 co-relation queries the response was YES. [2024-06-14 12:51:31,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37352 conditions, 4593 events. 3134/4593 cut-off events. For 147626/147751 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22339 event pairs, 647 based on Foata normal form. 27/4555 useless extension candidates. Maximal degree in co-relation 37266. Up to 4255 conditions per place. [2024-06-14 12:51:31,529 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 55 changer transitions 0/336 dead transitions. [2024-06-14 12:51:31,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 336 transitions, 5107 flow [2024-06-14 12:51:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:51:31,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 12:51:31,530 INFO L175 Difference]: Start difference. First operand has 171 places, 309 transitions, 4365 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:51:31,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 336 transitions, 5107 flow [2024-06-14 12:51:31,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 336 transitions, 4967 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:31,705 INFO L231 Difference]: Finished difference. Result has 173 places, 311 transitions, 4411 flow [2024-06-14 12:51:31,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4411, PETRI_PLACES=173, PETRI_TRANSITIONS=311} [2024-06-14 12:51:31,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 12:51:31,706 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 311 transitions, 4411 flow [2024-06-14 12:51:31,706 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 12:51:31,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:31,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:31,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:51:31,706 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:31,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:31,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1453476026, now seen corresponding path program 1 times [2024-06-14 12:51:31,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:31,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665597467] [2024-06-14 12:51:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:31,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:32,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665597467] [2024-06-14 12:51:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665597467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:32,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:32,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:32,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438990707] [2024-06-14 12:51:32,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:32,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:32,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:32,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:32,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 311 transitions, 4411 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:32,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:32,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:33,489 INFO L124 PetriNetUnfolderBase]: 3245/4739 cut-off events. [2024-06-14 12:51:33,489 INFO L125 PetriNetUnfolderBase]: For 140272/140285 co-relation queries the response was YES. [2024-06-14 12:51:33,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37906 conditions, 4739 events. 3245/4739 cut-off events. For 140272/140285 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22982 event pairs, 679 based on Foata normal form. 15/4750 useless extension candidates. Maximal degree in co-relation 37819. Up to 4310 conditions per place. [2024-06-14 12:51:33,533 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 265 selfloop transitions, 88 changer transitions 0/356 dead transitions. [2024-06-14 12:51:33,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 356 transitions, 5566 flow [2024-06-14 12:51:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:51:33,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 12:51:33,534 INFO L175 Difference]: Start difference. First operand has 173 places, 311 transitions, 4411 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:51:33,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 356 transitions, 5566 flow [2024-06-14 12:51:33,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 356 transitions, 5408 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:33,753 INFO L231 Difference]: Finished difference. Result has 179 places, 321 transitions, 4673 flow [2024-06-14 12:51:33,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4257, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4673, PETRI_PLACES=179, PETRI_TRANSITIONS=321} [2024-06-14 12:51:33,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 12:51:33,754 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 321 transitions, 4673 flow [2024-06-14 12:51:33,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:33,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:33,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:51:33,755 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 12:51:33,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1233981460, now seen corresponding path program 1 times [2024-06-14 12:51:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559522156] [2024-06-14 12:51:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:34,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:34,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559522156] [2024-06-14 12:51:34,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559522156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:34,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:34,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362181527] [2024-06-14 12:51:34,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:34,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:34,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:34,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:34,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 321 transitions, 4673 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:34,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:34,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:34,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:35,653 INFO L124 PetriNetUnfolderBase]: 3412/5002 cut-off events. [2024-06-14 12:51:35,654 INFO L125 PetriNetUnfolderBase]: For 164346/164359 co-relation queries the response was YES. [2024-06-14 12:51:35,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40663 conditions, 5002 events. 3412/5002 cut-off events. For 164346/164359 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24649 event pairs, 686 based on Foata normal form. 42/5040 useless extension candidates. Maximal degree in co-relation 40573. Up to 4587 conditions per place. [2024-06-14 12:51:35,701 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 303 selfloop transitions, 61 changer transitions 0/367 dead transitions. [2024-06-14 12:51:35,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 367 transitions, 5788 flow [2024-06-14 12:51:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:51:35,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:51:35,702 INFO L175 Difference]: Start difference. First operand has 179 places, 321 transitions, 4673 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:51:35,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 367 transitions, 5788 flow [2024-06-14 12:51:35,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 367 transitions, 5610 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:35,963 INFO L231 Difference]: Finished difference. Result has 185 places, 330 transitions, 4819 flow [2024-06-14 12:51:35,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4819, PETRI_PLACES=185, PETRI_TRANSITIONS=330} [2024-06-14 12:51:35,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-14 12:51:35,964 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 330 transitions, 4819 flow [2024-06-14 12:51:35,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:35,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:35,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:35,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:51:35,965 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 12:51:35,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1233796762, now seen corresponding path program 4 times [2024-06-14 12:51:35,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:35,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501913256] [2024-06-14 12:51:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:35,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:36,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501913256] [2024-06-14 12:51:36,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501913256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:36,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:36,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499878521] [2024-06-14 12:51:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:36,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:36,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:36,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:37,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:51:37,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 330 transitions, 4819 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 12:51:37,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:37,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:51:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:37,842 INFO L124 PetriNetUnfolderBase]: 3303/4862 cut-off events. [2024-06-14 12:51:37,842 INFO L125 PetriNetUnfolderBase]: For 167710/167815 co-relation queries the response was YES. [2024-06-14 12:51:37,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40556 conditions, 4862 events. 3303/4862 cut-off events. For 167710/167815 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 24055 event pairs, 642 based on Foata normal form. 23/4810 useless extension candidates. Maximal degree in co-relation 40464. Up to 4428 conditions per place. [2024-06-14 12:51:37,887 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 76 changer transitions 0/354 dead transitions. [2024-06-14 12:51:37,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 354 transitions, 5585 flow [2024-06-14 12:51:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:51:37,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:51:37,888 INFO L175 Difference]: Start difference. First operand has 185 places, 330 transitions, 4819 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:51:37,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 354 transitions, 5585 flow [2024-06-14 12:51:38,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 354 transitions, 5424 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:38,123 INFO L231 Difference]: Finished difference. Result has 186 places, 332 transitions, 4887 flow [2024-06-14 12:51:38,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4887, PETRI_PLACES=186, PETRI_TRANSITIONS=332} [2024-06-14 12:51:38,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 12:51:38,124 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 332 transitions, 4887 flow [2024-06-14 12:51:38,124 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 12:51:38,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:38,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:51:38,124 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:38,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1776618748, now seen corresponding path program 1 times [2024-06-14 12:51:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056760299] [2024-06-14 12:51:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:38,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:38,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056760299] [2024-06-14 12:51:38,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056760299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:38,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:38,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:38,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803511810] [2024-06-14 12:51:38,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:38,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:38,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:38,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:39,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:39,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 332 transitions, 4887 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:39,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:39,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:39,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:40,310 INFO L124 PetriNetUnfolderBase]: 3459/5072 cut-off events. [2024-06-14 12:51:40,310 INFO L125 PetriNetUnfolderBase]: For 169530/169543 co-relation queries the response was YES. [2024-06-14 12:51:40,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41465 conditions, 5072 events. 3459/5072 cut-off events. For 169530/169543 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25059 event pairs, 663 based on Foata normal form. 16/5083 useless extension candidates. Maximal degree in co-relation 41372. Up to 4234 conditions per place. [2024-06-14 12:51:40,360 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 259 selfloop transitions, 125 changer transitions 0/387 dead transitions. [2024-06-14 12:51:40,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 387 transitions, 6126 flow [2024-06-14 12:51:40,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:51:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:51:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-14 12:51:40,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-14 12:51:40,361 INFO L175 Difference]: Start difference. First operand has 186 places, 332 transitions, 4887 flow. Second operand 11 states and 201 transitions. [2024-06-14 12:51:40,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 387 transitions, 6126 flow [2024-06-14 12:51:40,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 387 transitions, 5933 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:40,618 INFO L231 Difference]: Finished difference. Result has 192 places, 339 transitions, 5078 flow [2024-06-14 12:51:40,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5078, PETRI_PLACES=192, PETRI_TRANSITIONS=339} [2024-06-14 12:51:40,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 12:51:40,618 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 339 transitions, 5078 flow [2024-06-14 12:51:40,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:40,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:40,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:51:40,619 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 12:51:40,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1548537860, now seen corresponding path program 2 times [2024-06-14 12:51:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537634588] [2024-06-14 12:51:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537634588] [2024-06-14 12:51:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537634588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:41,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707474687] [2024-06-14 12:51:41,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:41,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:41,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:41,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:41,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:41,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 339 transitions, 5078 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:41,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:41,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:41,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:42,466 INFO L124 PetriNetUnfolderBase]: 3476/5096 cut-off events. [2024-06-14 12:51:42,466 INFO L125 PetriNetUnfolderBase]: For 175817/175830 co-relation queries the response was YES. [2024-06-14 12:51:42,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42270 conditions, 5096 events. 3476/5096 cut-off events. For 175817/175830 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25215 event pairs, 773 based on Foata normal form. 14/5106 useless extension candidates. Maximal degree in co-relation 42176. Up to 4960 conditions per place. [2024-06-14 12:51:42,519 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 334 selfloop transitions, 34 changer transitions 0/371 dead transitions. [2024-06-14 12:51:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 371 transitions, 5958 flow [2024-06-14 12:51:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:51:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:51:42,521 INFO L175 Difference]: Start difference. First operand has 192 places, 339 transitions, 5078 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:51:42,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 371 transitions, 5958 flow [2024-06-14 12:51:42,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 371 transitions, 5650 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 12:51:42,834 INFO L231 Difference]: Finished difference. Result has 192 places, 341 transitions, 4897 flow [2024-06-14 12:51:42,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4897, PETRI_PLACES=192, PETRI_TRANSITIONS=341} [2024-06-14 12:51:42,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 12:51:42,835 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 341 transitions, 4897 flow [2024-06-14 12:51:42,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:42,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:42,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:42,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:51:42,836 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 12:51:42,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1540263650, now seen corresponding path program 3 times [2024-06-14 12:51:42,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:42,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312068016] [2024-06-14 12:51:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:43,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312068016] [2024-06-14 12:51:43,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312068016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:43,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:43,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:43,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561161360] [2024-06-14 12:51:43,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:43,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:43,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:43,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:43,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 341 transitions, 4897 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:43,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:43,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:43,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:44,753 INFO L124 PetriNetUnfolderBase]: 3493/5123 cut-off events. [2024-06-14 12:51:44,753 INFO L125 PetriNetUnfolderBase]: For 183057/183070 co-relation queries the response was YES. [2024-06-14 12:51:44,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42213 conditions, 5123 events. 3493/5123 cut-off events. For 183057/183070 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25325 event pairs, 786 based on Foata normal form. 14/5133 useless extension candidates. Maximal degree in co-relation 42118. Up to 4933 conditions per place. [2024-06-14 12:51:44,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 48 changer transitions 0/377 dead transitions. [2024-06-14 12:51:44,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 377 transitions, 5805 flow [2024-06-14 12:51:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 12:51:44,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-14 12:51:44,807 INFO L175 Difference]: Start difference. First operand has 192 places, 341 transitions, 4897 flow. Second operand 10 states and 156 transitions. [2024-06-14 12:51:44,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 377 transitions, 5805 flow [2024-06-14 12:51:45,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 377 transitions, 5719 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:45,088 INFO L231 Difference]: Finished difference. Result has 198 places, 343 transitions, 4973 flow [2024-06-14 12:51:45,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4973, PETRI_PLACES=198, PETRI_TRANSITIONS=343} [2024-06-14 12:51:45,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 12:51:45,089 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 343 transitions, 4973 flow [2024-06-14 12:51:45,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:45,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:45,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:45,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:51:45,089 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 12:51:45,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1539966980, now seen corresponding path program 4 times [2024-06-14 12:51:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272177268] [2024-06-14 12:51:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:45,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:45,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272177268] [2024-06-14 12:51:45,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272177268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:45,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615605573] [2024-06-14 12:51:45,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:45,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:45,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:45,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 343 transitions, 4973 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:45,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:45,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:45,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:46,958 INFO L124 PetriNetUnfolderBase]: 3621/5334 cut-off events. [2024-06-14 12:51:46,958 INFO L125 PetriNetUnfolderBase]: For 205859/205872 co-relation queries the response was YES. [2024-06-14 12:51:46,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44459 conditions, 5334 events. 3621/5334 cut-off events. For 205859/205872 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26747 event pairs, 683 based on Foata normal form. 10/5339 useless extension candidates. Maximal degree in co-relation 44362. Up to 4435 conditions per place. [2024-06-14 12:51:47,012 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 102 changer transitions 0/389 dead transitions. [2024-06-14 12:51:47,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 389 transitions, 6270 flow [2024-06-14 12:51:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:51:47,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 12:51:47,013 INFO L175 Difference]: Start difference. First operand has 198 places, 343 transitions, 4973 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:51:47,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 389 transitions, 6270 flow [2024-06-14 12:51:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 389 transitions, 6108 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:47,314 INFO L231 Difference]: Finished difference. Result has 200 places, 348 transitions, 5181 flow [2024-06-14 12:51:47,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5181, PETRI_PLACES=200, PETRI_TRANSITIONS=348} [2024-06-14 12:51:47,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-14 12:51:47,315 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 348 transitions, 5181 flow [2024-06-14 12:51:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:47,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:47,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:51:47,315 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 12:51:47,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1776439010, now seen corresponding path program 5 times [2024-06-14 12:51:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:47,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922204558] [2024-06-14 12:51:47,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:47,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:48,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922204558] [2024-06-14 12:51:48,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922204558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:48,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:48,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936056257] [2024-06-14 12:51:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:48,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:48,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:48,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:48,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:48,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 348 transitions, 5181 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:48,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:48,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:48,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:49,360 INFO L124 PetriNetUnfolderBase]: 3681/5427 cut-off events. [2024-06-14 12:51:49,361 INFO L125 PetriNetUnfolderBase]: For 216532/216545 co-relation queries the response was YES. [2024-06-14 12:51:49,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45505 conditions, 5427 events. 3681/5427 cut-off events. For 216532/216545 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27461 event pairs, 819 based on Foata normal form. 28/5451 useless extension candidates. Maximal degree in co-relation 45406. Up to 5162 conditions per place. [2024-06-14 12:51:49,414 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 335 selfloop transitions, 53 changer transitions 0/391 dead transitions. [2024-06-14 12:51:49,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 391 transitions, 6298 flow [2024-06-14 12:51:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:49,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 12:51:49,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121951219512195 [2024-06-14 12:51:49,416 INFO L175 Difference]: Start difference. First operand has 200 places, 348 transitions, 5181 flow. Second operand 10 states and 169 transitions. [2024-06-14 12:51:49,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 391 transitions, 6298 flow [2024-06-14 12:51:49,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 391 transitions, 6105 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:49,734 INFO L231 Difference]: Finished difference. Result has 205 places, 351 transitions, 5209 flow [2024-06-14 12:51:49,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5209, PETRI_PLACES=205, PETRI_TRANSITIONS=351} [2024-06-14 12:51:49,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 12:51:49,735 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 351 transitions, 5209 flow [2024-06-14 12:51:49,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:49,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:49,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:51:49,735 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:49,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1776445768, now seen corresponding path program 2 times [2024-06-14 12:51:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:49,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245205582] [2024-06-14 12:51:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:49,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:50,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:50,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245205582] [2024-06-14 12:51:50,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245205582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:50,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:50,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237518300] [2024-06-14 12:51:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:50,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:50,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:50,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:50,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:50,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:50,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 351 transitions, 5209 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:50,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:50,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:50,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:51,765 INFO L124 PetriNetUnfolderBase]: 3661/5404 cut-off events. [2024-06-14 12:51:51,766 INFO L125 PetriNetUnfolderBase]: For 212886/212899 co-relation queries the response was YES. [2024-06-14 12:51:51,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45100 conditions, 5404 events. 3661/5404 cut-off events. For 212886/212899 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 27355 event pairs, 721 based on Foata normal form. 16/5415 useless extension candidates. Maximal degree in co-relation 45000. Up to 4581 conditions per place. [2024-06-14 12:51:51,819 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 264 selfloop transitions, 123 changer transitions 0/390 dead transitions. [2024-06-14 12:51:51,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 390 transitions, 6203 flow [2024-06-14 12:51:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:51:51,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-14 12:51:51,820 INFO L175 Difference]: Start difference. First operand has 205 places, 351 transitions, 5209 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:51:51,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 390 transitions, 6203 flow [2024-06-14 12:51:52,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 390 transitions, 5999 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:52,254 INFO L231 Difference]: Finished difference. Result has 207 places, 351 transitions, 5264 flow [2024-06-14 12:51:52,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5264, PETRI_PLACES=207, PETRI_TRANSITIONS=351} [2024-06-14 12:51:52,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 12:51:52,254 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 351 transitions, 5264 flow [2024-06-14 12:51:52,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:52,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:52,255 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 12:51:52,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:51:52,255 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:52,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1099111592, now seen corresponding path program 1 times [2024-06-14 12:51:52,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:52,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011615222] [2024-06-14 12:51:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:52,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:53,114 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 12:51:53,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:53,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011615222] [2024-06-14 12:51:53,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011615222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:53,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:53,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179243515] [2024-06-14 12:51:53,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:53,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:53,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 351 transitions, 5264 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:53,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:53,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:53,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:54,551 INFO L124 PetriNetUnfolderBase]: 3968/5870 cut-off events. [2024-06-14 12:51:54,551 INFO L125 PetriNetUnfolderBase]: For 246552/246565 co-relation queries the response was YES. [2024-06-14 12:51:54,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49362 conditions, 5870 events. 3968/5870 cut-off events. For 246552/246565 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30381 event pairs, 672 based on Foata normal form. 28/5894 useless extension candidates. Maximal degree in co-relation 49261. Up to 5144 conditions per place. [2024-06-14 12:51:54,604 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 346 selfloop transitions, 70 changer transitions 0/419 dead transitions. [2024-06-14 12:51:54,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 419 transitions, 6894 flow [2024-06-14 12:51:54,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:51:54,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-14 12:51:54,606 INFO L175 Difference]: Start difference. First operand has 207 places, 351 transitions, 5264 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:51:54,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 419 transitions, 6894 flow [2024-06-14 12:51:54,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 419 transitions, 6600 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 12:51:54,931 INFO L231 Difference]: Finished difference. Result has 210 places, 365 transitions, 5430 flow [2024-06-14 12:51:54,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5430, PETRI_PLACES=210, PETRI_TRANSITIONS=365} [2024-06-14 12:51:54,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 12:51:54,932 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 365 transitions, 5430 flow [2024-06-14 12:51:54,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:54,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:54,933 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 12:51:54,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:51:54,933 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 12:51:54,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1327415838, now seen corresponding path program 2 times [2024-06-14 12:51:54,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:54,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707222496] [2024-06-14 12:51:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:55,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707222496] [2024-06-14 12:51:55,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707222496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:55,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:55,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:55,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602768888] [2024-06-14 12:51:55,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:55,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:55,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:56,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:56,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 365 transitions, 5430 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:56,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:56,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:56,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:57,294 INFO L124 PetriNetUnfolderBase]: 4053/6005 cut-off events. [2024-06-14 12:51:57,294 INFO L125 PetriNetUnfolderBase]: For 269641/269654 co-relation queries the response was YES. [2024-06-14 12:51:57,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51787 conditions, 6005 events. 4053/6005 cut-off events. For 269641/269654 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 31310 event pairs, 878 based on Foata normal form. 28/6029 useless extension candidates. Maximal degree in co-relation 51683. Up to 5464 conditions per place. [2024-06-14 12:51:57,358 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 319 selfloop transitions, 91 changer transitions 0/413 dead transitions. [2024-06-14 12:51:57,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 413 transitions, 6772 flow [2024-06-14 12:51:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:57,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:51:57,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-14 12:51:57,359 INFO L175 Difference]: Start difference. First operand has 210 places, 365 transitions, 5430 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:51:57,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 413 transitions, 6772 flow [2024-06-14 12:51:57,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 413 transitions, 6568 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:57,783 INFO L231 Difference]: Finished difference. Result has 215 places, 368 transitions, 5527 flow [2024-06-14 12:51:57,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5527, PETRI_PLACES=215, PETRI_TRANSITIONS=368} [2024-06-14 12:51:57,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 12:51:57,784 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 368 transitions, 5527 flow [2024-06-14 12:51:57,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:57,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:57,784 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 12:51:57,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:51:57,784 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 12:51:57,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:57,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2103764404, now seen corresponding path program 3 times [2024-06-14 12:51:57,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:57,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067871470] [2024-06-14 12:51:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:57,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:58,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067871470] [2024-06-14 12:51:58,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067871470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:58,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:58,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66911086] [2024-06-14 12:51:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:58,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:58,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:51:58,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 368 transitions, 5527 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:58,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:58,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:51:58,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:00,183 INFO L124 PetriNetUnfolderBase]: 4290/6368 cut-off events. [2024-06-14 12:52:00,183 INFO L125 PetriNetUnfolderBase]: For 303325/303338 co-relation queries the response was YES. [2024-06-14 12:52:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55530 conditions, 6368 events. 4290/6368 cut-off events. For 303325/303338 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 33741 event pairs, 909 based on Foata normal form. 28/6392 useless extension candidates. Maximal degree in co-relation 55424. Up to 5471 conditions per place. [2024-06-14 12:52:00,255 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 334 selfloop transitions, 89 changer transitions 0/426 dead transitions. [2024-06-14 12:52:00,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 426 transitions, 7117 flow [2024-06-14 12:52:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-14 12:52:00,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-14 12:52:00,256 INFO L175 Difference]: Start difference. First operand has 215 places, 368 transitions, 5527 flow. Second operand 10 states and 181 transitions. [2024-06-14 12:52:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 426 transitions, 7117 flow [2024-06-14 12:52:00,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 426 transitions, 6860 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:00,753 INFO L231 Difference]: Finished difference. Result has 218 places, 375 transitions, 5690 flow [2024-06-14 12:52:00,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5690, PETRI_PLACES=218, PETRI_TRANSITIONS=375} [2024-06-14 12:52:00,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 12:52:00,754 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 375 transitions, 5690 flow [2024-06-14 12:52:00,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:00,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:00,754 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 12:52:00,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:52:00,754 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 12:52:00,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:00,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2104357260, now seen corresponding path program 1 times [2024-06-14 12:52:00,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:00,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303072141] [2024-06-14 12:52:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:00,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:01,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:01,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303072141] [2024-06-14 12:52:01,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303072141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:01,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:01,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:01,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025317939] [2024-06-14 12:52:01,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:01,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:01,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:01,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 375 transitions, 5690 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:01,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:01,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:01,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:03,107 INFO L124 PetriNetUnfolderBase]: 4719/7086 cut-off events. [2024-06-14 12:52:03,107 INFO L125 PetriNetUnfolderBase]: For 377256/377269 co-relation queries the response was YES. [2024-06-14 12:52:03,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59859 conditions, 7086 events. 4719/7086 cut-off events. For 377256/377269 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38836 event pairs, 961 based on Foata normal form. 96/7177 useless extension candidates. Maximal degree in co-relation 59751. Up to 5352 conditions per place. [2024-06-14 12:52:03,175 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 263 selfloop transitions, 162 changer transitions 0/428 dead transitions. [2024-06-14 12:52:03,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 428 transitions, 7161 flow [2024-06-14 12:52:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:52:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 12:52:03,176 INFO L175 Difference]: Start difference. First operand has 218 places, 375 transitions, 5690 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:52:03,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 428 transitions, 7161 flow [2024-06-14 12:52:03,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 428 transitions, 6927 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:03,760 INFO L231 Difference]: Finished difference. Result has 221 places, 381 transitions, 5955 flow [2024-06-14 12:52:03,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5456, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=221, PETRI_TRANSITIONS=381} [2024-06-14 12:52:03,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 12:52:03,761 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 381 transitions, 5955 flow [2024-06-14 12:52:03,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:03,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:03,761 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 12:52:03,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:52:03,761 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:03,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1469518908, now seen corresponding path program 4 times [2024-06-14 12:52:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:03,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633387801] [2024-06-14 12:52:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:03,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633387801] [2024-06-14 12:52:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633387801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:04,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:04,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:04,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258875890] [2024-06-14 12:52:04,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:04,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:04,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:04,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 381 transitions, 5955 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:04,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:04,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:06,292 INFO L124 PetriNetUnfolderBase]: 4804/7221 cut-off events. [2024-06-14 12:52:06,292 INFO L125 PetriNetUnfolderBase]: For 344856/344869 co-relation queries the response was YES. [2024-06-14 12:52:06,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61856 conditions, 7221 events. 4804/7221 cut-off events. For 344856/344869 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 39749 event pairs, 1091 based on Foata normal form. 24/7240 useless extension candidates. Maximal degree in co-relation 61746. Up to 5986 conditions per place. [2024-06-14 12:52:06,374 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 279 selfloop transitions, 146 changer transitions 0/428 dead transitions. [2024-06-14 12:52:06,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 428 transitions, 7375 flow [2024-06-14 12:52:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:52:06,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-14 12:52:06,375 INFO L175 Difference]: Start difference. First operand has 221 places, 381 transitions, 5955 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:52:06,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 428 transitions, 7375 flow [2024-06-14 12:52:06,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 428 transitions, 6989 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:07,004 INFO L231 Difference]: Finished difference. Result has 223 places, 384 transitions, 5991 flow [2024-06-14 12:52:07,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5569, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5991, PETRI_PLACES=223, PETRI_TRANSITIONS=384} [2024-06-14 12:52:07,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 12:52:07,004 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 384 transitions, 5991 flow [2024-06-14 12:52:07,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:07,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:07,004 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 12:52:07,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:52:07,005 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:07,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1755933102, now seen corresponding path program 5 times [2024-06-14 12:52:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:07,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970541267] [2024-06-14 12:52:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:07,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970541267] [2024-06-14 12:52:07,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970541267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:07,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:07,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247668318] [2024-06-14 12:52:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:07,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:07,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:07,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:08,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:08,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 384 transitions, 5991 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:08,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:08,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:08,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:09,758 INFO L124 PetriNetUnfolderBase]: 5498/8303 cut-off events. [2024-06-14 12:52:09,758 INFO L125 PetriNetUnfolderBase]: For 460779/460792 co-relation queries the response was YES. [2024-06-14 12:52:09,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73067 conditions, 8303 events. 5498/8303 cut-off events. For 460779/460792 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 47236 event pairs, 1221 based on Foata normal form. 24/8322 useless extension candidates. Maximal degree in co-relation 72956. Up to 6013 conditions per place. [2024-06-14 12:52:09,846 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 294 selfloop transitions, 148 changer transitions 0/445 dead transitions. [2024-06-14 12:52:09,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 445 transitions, 7827 flow [2024-06-14 12:52:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:52:09,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-14 12:52:09,847 INFO L175 Difference]: Start difference. First operand has 223 places, 384 transitions, 5991 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:52:09,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 445 transitions, 7827 flow [2024-06-14 12:52:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 445 transitions, 7451 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:10,625 INFO L231 Difference]: Finished difference. Result has 226 places, 391 transitions, 6181 flow [2024-06-14 12:52:10,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5615, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6181, PETRI_PLACES=226, PETRI_TRANSITIONS=391} [2024-06-14 12:52:10,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 12:52:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 391 transitions, 6181 flow [2024-06-14 12:52:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:10,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:10,626 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 12:52:10,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:52:10,626 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:10,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1750422852, now seen corresponding path program 6 times [2024-06-14 12:52:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112254301] [2024-06-14 12:52:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:10,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:11,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112254301] [2024-06-14 12:52:11,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112254301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:11,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:11,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409755562] [2024-06-14 12:52:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:11,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:11,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:11,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:11,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:11,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:11,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 391 transitions, 6181 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:11,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:11,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:11,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:13,576 INFO L124 PetriNetUnfolderBase]: 5545/8380 cut-off events. [2024-06-14 12:52:13,576 INFO L125 PetriNetUnfolderBase]: For 478864/478877 co-relation queries the response was YES. [2024-06-14 12:52:13,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74128 conditions, 8380 events. 5545/8380 cut-off events. For 478864/478877 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47889 event pairs, 1408 based on Foata normal form. 24/8399 useless extension candidates. Maximal degree in co-relation 74015. Up to 7492 conditions per place. [2024-06-14 12:52:13,681 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 299 selfloop transitions, 137 changer transitions 0/439 dead transitions. [2024-06-14 12:52:13,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 439 transitions, 7671 flow [2024-06-14 12:52:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:52:13,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-14 12:52:13,682 INFO L175 Difference]: Start difference. First operand has 226 places, 391 transitions, 6181 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:52:13,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 439 transitions, 7671 flow [2024-06-14 12:52:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 439 transitions, 7318 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:14,548 INFO L231 Difference]: Finished difference. Result has 230 places, 394 transitions, 6248 flow [2024-06-14 12:52:14,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6248, PETRI_PLACES=230, PETRI_TRANSITIONS=394} [2024-06-14 12:52:14,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 12:52:14,549 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 394 transitions, 6248 flow [2024-06-14 12:52:14,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:14,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:14,549 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 12:52:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:52:14,549 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:14,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:14,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1750215090, now seen corresponding path program 2 times [2024-06-14 12:52:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436685471] [2024-06-14 12:52:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:15,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:15,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436685471] [2024-06-14 12:52:15,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436685471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:15,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:15,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:15,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119346352] [2024-06-14 12:52:15,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:15,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:15,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:15,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:15,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 394 transitions, 6248 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:15,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:15,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:15,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:17,032 INFO L124 PetriNetUnfolderBase]: 5674/8611 cut-off events. [2024-06-14 12:52:17,032 INFO L125 PetriNetUnfolderBase]: For 505324/505337 co-relation queries the response was YES. [2024-06-14 12:52:17,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73137 conditions, 8611 events. 5674/8611 cut-off events. For 505324/505337 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 49554 event pairs, 1382 based on Foata normal form. 80/8686 useless extension candidates. Maximal degree in co-relation 73022. Up to 6870 conditions per place. [2024-06-14 12:52:17,130 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 280 selfloop transitions, 159 changer transitions 0/442 dead transitions. [2024-06-14 12:52:17,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 442 transitions, 7695 flow [2024-06-14 12:52:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:52:17,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 12:52:17,131 INFO L175 Difference]: Start difference. First operand has 230 places, 394 transitions, 6248 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:52:17,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 442 transitions, 7695 flow [2024-06-14 12:52:17,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 442 transitions, 7288 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:17,986 INFO L231 Difference]: Finished difference. Result has 232 places, 396 transitions, 6263 flow [2024-06-14 12:52:17,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5841, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6263, PETRI_PLACES=232, PETRI_TRANSITIONS=396} [2024-06-14 12:52:17,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 12:52:17,987 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 396 transitions, 6263 flow [2024-06-14 12:52:17,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:17,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:17,987 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 12:52:17,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:52:17,987 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:17,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1475240640, now seen corresponding path program 3 times [2024-06-14 12:52:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:17,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069279808] [2024-06-14 12:52:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:17,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069279808] [2024-06-14 12:52:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069279808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:18,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:18,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:18,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803251267] [2024-06-14 12:52:18,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:18,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:18,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:18,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 396 transitions, 6263 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:18,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:18,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:18,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:20,843 INFO L124 PetriNetUnfolderBase]: 6389/9772 cut-off events. [2024-06-14 12:52:20,843 INFO L125 PetriNetUnfolderBase]: For 620428/620441 co-relation queries the response was YES. [2024-06-14 12:52:20,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83728 conditions, 9772 events. 6389/9772 cut-off events. For 620428/620441 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 58216 event pairs, 1420 based on Foata normal form. 78/9845 useless extension candidates. Maximal degree in co-relation 83612. Up to 5657 conditions per place. [2024-06-14 12:52:20,942 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 281 selfloop transitions, 174 changer transitions 0/458 dead transitions. [2024-06-14 12:52:20,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 458 transitions, 8189 flow [2024-06-14 12:52:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 12:52:20,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-14 12:52:20,944 INFO L175 Difference]: Start difference. First operand has 232 places, 396 transitions, 6263 flow. Second operand 9 states and 181 transitions. [2024-06-14 12:52:20,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 458 transitions, 8189 flow [2024-06-14 12:52:21,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 458 transitions, 7824 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:21,898 INFO L231 Difference]: Finished difference. Result has 235 places, 403 transitions, 6599 flow [2024-06-14 12:52:21,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6599, PETRI_PLACES=235, PETRI_TRANSITIONS=403} [2024-06-14 12:52:21,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 12:52:21,899 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 403 transitions, 6599 flow [2024-06-14 12:52:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:21,899 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 12:52:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:52:21,899 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -760039342, now seen corresponding path program 4 times [2024-06-14 12:52:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243159840] [2024-06-14 12:52:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:22,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:22,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243159840] [2024-06-14 12:52:22,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243159840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:22,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:22,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261534703] [2024-06-14 12:52:22,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:22,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:22,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:22,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 403 transitions, 6599 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:22,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:22,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:22,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:24,636 INFO L124 PetriNetUnfolderBase]: 6481/9924 cut-off events. [2024-06-14 12:52:24,636 INFO L125 PetriNetUnfolderBase]: For 605909/605922 co-relation queries the response was YES. [2024-06-14 12:52:24,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85960 conditions, 9924 events. 6481/9924 cut-off events. For 605909/605922 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 60030 event pairs, 1971 based on Foata normal form. 30/9949 useless extension candidates. Maximal degree in co-relation 85842. Up to 9170 conditions per place. [2024-06-14 12:52:24,754 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 92 changer transitions 0/442 dead transitions. [2024-06-14 12:52:24,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 442 transitions, 7710 flow [2024-06-14 12:52:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:52:24,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 12:52:24,755 INFO L175 Difference]: Start difference. First operand has 235 places, 403 transitions, 6599 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:52:24,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 442 transitions, 7710 flow [2024-06-14 12:52:25,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 442 transitions, 7379 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:25,923 INFO L231 Difference]: Finished difference. Result has 239 places, 405 transitions, 6541 flow [2024-06-14 12:52:25,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6268, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6541, PETRI_PLACES=239, PETRI_TRANSITIONS=405} [2024-06-14 12:52:25,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 12:52:25,923 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 405 transitions, 6541 flow [2024-06-14 12:52:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:25,924 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 12:52:25,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:52:25,924 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:25,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash -503531392, now seen corresponding path program 5 times [2024-06-14 12:52:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:25,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613808566] [2024-06-14 12:52:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:26,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:26,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613808566] [2024-06-14 12:52:26,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613808566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:26,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:26,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:26,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89040989] [2024-06-14 12:52:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:26,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:26,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:26,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:26,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:26,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:26,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 405 transitions, 6541 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:26,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:26,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:26,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:28,656 INFO L124 PetriNetUnfolderBase]: 6711/10306 cut-off events. [2024-06-14 12:52:28,656 INFO L125 PetriNetUnfolderBase]: For 641922/641935 co-relation queries the response was YES. [2024-06-14 12:52:28,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89321 conditions, 10306 events. 6711/10306 cut-off events. For 641922/641935 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63070 event pairs, 1916 based on Foata normal form. 22/10323 useless extension candidates. Maximal degree in co-relation 89201. Up to 9153 conditions per place. [2024-06-14 12:52:28,971 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 94 changer transitions 0/450 dead transitions. [2024-06-14 12:52:28,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 450 transitions, 7899 flow [2024-06-14 12:52:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:52:28,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 12:52:28,972 INFO L175 Difference]: Start difference. First operand has 239 places, 405 transitions, 6541 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:52:28,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 450 transitions, 7899 flow [2024-06-14 12:52:29,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 450 transitions, 7674 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:29,825 INFO L231 Difference]: Finished difference. Result has 243 places, 408 transitions, 6638 flow [2024-06-14 12:52:29,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6316, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6638, PETRI_PLACES=243, PETRI_TRANSITIONS=408} [2024-06-14 12:52:29,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 12:52:29,825 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 408 transitions, 6638 flow [2024-06-14 12:52:29,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:29,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:29,826 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 12:52:29,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:52:29,826 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:29,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash 759245308, now seen corresponding path program 7 times [2024-06-14 12:52:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:29,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572961310] [2024-06-14 12:52:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:29,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:30,798 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 12:52:30,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:30,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572961310] [2024-06-14 12:52:30,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572961310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:30,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:30,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:30,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700703266] [2024-06-14 12:52:30,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:30,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:30,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:30,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:30,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:30,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:30,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 408 transitions, 6638 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:30,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:30,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:30,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:33,245 INFO L124 PetriNetUnfolderBase]: 6796/10441 cut-off events. [2024-06-14 12:52:33,245 INFO L125 PetriNetUnfolderBase]: For 676354/676367 co-relation queries the response was YES. [2024-06-14 12:52:33,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91065 conditions, 10441 events. 6796/10441 cut-off events. For 676354/676367 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 64146 event pairs, 1924 based on Foata normal form. 24/10460 useless extension candidates. Maximal degree in co-relation 90942. Up to 9522 conditions per place. [2024-06-14 12:52:33,370 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 332 selfloop transitions, 127 changer transitions 0/462 dead transitions. [2024-06-14 12:52:33,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 462 transitions, 8108 flow [2024-06-14 12:52:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:52:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:52:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-14 12:52:33,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-14 12:52:33,377 INFO L175 Difference]: Start difference. First operand has 243 places, 408 transitions, 6638 flow. Second operand 11 states and 202 transitions. [2024-06-14 12:52:33,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 462 transitions, 8108 flow [2024-06-14 12:52:34,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 462 transitions, 7951 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:34,476 INFO L231 Difference]: Finished difference. Result has 249 places, 411 transitions, 6893 flow [2024-06-14 12:52:34,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6481, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6893, PETRI_PLACES=249, PETRI_TRANSITIONS=411} [2024-06-14 12:52:34,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 12:52:34,476 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 411 transitions, 6893 flow [2024-06-14 12:52:34,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:34,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:34,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:34,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:52:34,477 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:34,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:34,477 INFO L85 PathProgramCache]: Analyzing trace with hash -494334622, now seen corresponding path program 6 times [2024-06-14 12:52:34,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191882307] [2024-06-14 12:52:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:34,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:35,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191882307] [2024-06-14 12:52:35,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191882307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:35,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:35,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:35,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300815191] [2024-06-14 12:52:35,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:35,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:35,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:35,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:35,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:35,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:35,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 411 transitions, 6893 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:35,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:35,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:37,674 INFO L124 PetriNetUnfolderBase]: 6940/10681 cut-off events. [2024-06-14 12:52:37,675 INFO L125 PetriNetUnfolderBase]: For 723951/723964 co-relation queries the response was YES. [2024-06-14 12:52:37,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94704 conditions, 10681 events. 6940/10681 cut-off events. For 723951/723964 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 65254 event pairs, 1906 based on Foata normal form. 22/10698 useless extension candidates. Maximal degree in co-relation 94579. Up to 8430 conditions per place. [2024-06-14 12:52:37,807 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 350 selfloop transitions, 107 changer transitions 0/460 dead transitions. [2024-06-14 12:52:37,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 460 transitions, 8384 flow [2024-06-14 12:52:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:52:37,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:52:37,808 INFO L175 Difference]: Start difference. First operand has 249 places, 411 transitions, 6893 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:52:37,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 460 transitions, 8384 flow [2024-06-14 12:52:39,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 460 transitions, 7989 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-14 12:52:39,101 INFO L231 Difference]: Finished difference. Result has 249 places, 413 transitions, 6841 flow [2024-06-14 12:52:39,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6527, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6841, PETRI_PLACES=249, PETRI_TRANSITIONS=413} [2024-06-14 12:52:39,101 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 12:52:39,101 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 413 transitions, 6841 flow [2024-06-14 12:52:39,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:39,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:39,101 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 12:52:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:52:39,102 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:39,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:39,102 INFO L85 PathProgramCache]: Analyzing trace with hash 759241588, now seen corresponding path program 8 times [2024-06-14 12:52:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936675693] [2024-06-14 12:52:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:39,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:40,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:40,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936675693] [2024-06-14 12:52:40,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936675693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:40,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:40,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55417597] [2024-06-14 12:52:40,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:40,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:40,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:40,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:40,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:40,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:40,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 413 transitions, 6841 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:40,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:40,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:40,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:42,720 INFO L124 PetriNetUnfolderBase]: 7567/11658 cut-off events. [2024-06-14 12:52:42,720 INFO L125 PetriNetUnfolderBase]: For 883600/883613 co-relation queries the response was YES. [2024-06-14 12:52:42,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106102 conditions, 11658 events. 7567/11658 cut-off events. For 883600/883613 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 73233 event pairs, 2101 based on Foata normal form. 24/11677 useless extension candidates. Maximal degree in co-relation 105976. Up to 9684 conditions per place. [2024-06-14 12:52:42,875 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 347 selfloop transitions, 132 changer transitions 0/482 dead transitions. [2024-06-14 12:52:42,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 482 transitions, 8851 flow [2024-06-14 12:52:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:52:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:52:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-14 12:52:42,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:52:42,877 INFO L175 Difference]: Start difference. First operand has 249 places, 413 transitions, 6841 flow. Second operand 11 states and 209 transitions. [2024-06-14 12:52:42,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 482 transitions, 8851 flow [2024-06-14 12:52:44,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 482 transitions, 8689 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:44,411 INFO L231 Difference]: Finished difference. Result has 256 places, 421 transitions, 7314 flow [2024-06-14 12:52:44,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7314, PETRI_PLACES=256, PETRI_TRANSITIONS=421} [2024-06-14 12:52:44,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 12:52:44,412 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 421 transitions, 7314 flow [2024-06-14 12:52:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:44,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:44,412 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 12:52:44,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:52:44,412 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:44,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash 759395410, now seen corresponding path program 7 times [2024-06-14 12:52:44,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:44,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085442658] [2024-06-14 12:52:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:44,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:45,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085442658] [2024-06-14 12:52:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085442658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:45,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:45,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133587895] [2024-06-14 12:52:45,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:45,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:45,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:45,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 421 transitions, 7314 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:47,908 INFO L124 PetriNetUnfolderBase]: 7782/12023 cut-off events. [2024-06-14 12:52:47,908 INFO L125 PetriNetUnfolderBase]: For 963880/963893 co-relation queries the response was YES. [2024-06-14 12:52:48,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108762 conditions, 12023 events. 7782/12023 cut-off events. For 963880/963893 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 76172 event pairs, 2343 based on Foata normal form. 80/12098 useless extension candidates. Maximal degree in co-relation 108633. Up to 10698 conditions per place. [2024-06-14 12:52:48,070 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 345 selfloop transitions, 125 changer transitions 0/473 dead transitions. [2024-06-14 12:52:48,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 473 transitions, 8697 flow [2024-06-14 12:52:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-14 12:52:48,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-14 12:52:48,071 INFO L175 Difference]: Start difference. First operand has 256 places, 421 transitions, 7314 flow. Second operand 10 states and 183 transitions. [2024-06-14 12:52:48,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 473 transitions, 8697 flow [2024-06-14 12:52:50,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 473 transitions, 8342 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:50,143 INFO L231 Difference]: Finished difference. Result has 261 places, 428 transitions, 7412 flow [2024-06-14 12:52:50,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6963, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7412, PETRI_PLACES=261, PETRI_TRANSITIONS=428} [2024-06-14 12:52:50,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 12:52:50,143 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 428 transitions, 7412 flow [2024-06-14 12:52:50,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:50,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:50,144 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 12:52:50,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:52:50,144 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:50,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash 764959600, now seen corresponding path program 8 times [2024-06-14 12:52:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:50,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210699692] [2024-06-14 12:52:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:50,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210699692] [2024-06-14 12:52:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210699692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677476708] [2024-06-14 12:52:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:50,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:50,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:50,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:50,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:50,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 428 transitions, 7412 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:50,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:50,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:50,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:53,667 INFO L124 PetriNetUnfolderBase]: 7958/12331 cut-off events. [2024-06-14 12:52:53,668 INFO L125 PetriNetUnfolderBase]: For 966673/966686 co-relation queries the response was YES. [2024-06-14 12:52:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107897 conditions, 12331 events. 7958/12331 cut-off events. For 966673/966686 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 78716 event pairs, 2368 based on Foata normal form. 98/12424 useless extension candidates. Maximal degree in co-relation 107764. Up to 10906 conditions per place. [2024-06-14 12:52:53,824 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 341 selfloop transitions, 131 changer transitions 0/475 dead transitions. [2024-06-14 12:52:53,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 475 transitions, 8769 flow [2024-06-14 12:52:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 12:52:53,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:52:53,825 INFO L175 Difference]: Start difference. First operand has 261 places, 428 transitions, 7412 flow. Second operand 10 states and 185 transitions. [2024-06-14 12:52:53,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 475 transitions, 8769 flow [2024-06-14 12:52:55,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 475 transitions, 8473 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:55,845 INFO L231 Difference]: Finished difference. Result has 264 places, 430 transitions, 7494 flow [2024-06-14 12:52:55,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7116, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7494, PETRI_PLACES=264, PETRI_TRANSITIONS=430} [2024-06-14 12:52:55,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-14 12:52:55,846 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 430 transitions, 7494 flow [2024-06-14 12:52:55,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:55,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:55,846 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 12:52:55,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:52:55,846 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:55,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 764967040, now seen corresponding path program 9 times [2024-06-14 12:52:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:55,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149041099] [2024-06-14 12:52:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149041099] [2024-06-14 12:52:56,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149041099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:56,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:56,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094067144] [2024-06-14 12:52:56,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:56,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:52:56,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 430 transitions, 7494 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:56,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:56,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:52:56,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:00,121 INFO L124 PetriNetUnfolderBase]: 8411/13082 cut-off events. [2024-06-14 12:53:00,122 INFO L125 PetriNetUnfolderBase]: For 1029507/1029520 co-relation queries the response was YES. [2024-06-14 12:53:00,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114054 conditions, 13082 events. 8411/13082 cut-off events. For 1029507/1029520 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 84844 event pairs, 2424 based on Foata normal form. 78/13155 useless extension candidates. Maximal degree in co-relation 113921. Up to 9855 conditions per place. [2024-06-14 12:53:00,276 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 347 selfloop transitions, 138 changer transitions 0/488 dead transitions. [2024-06-14 12:53:00,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 488 transitions, 9288 flow [2024-06-14 12:53:00,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:53:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:53:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:53:00,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-14 12:53:00,278 INFO L175 Difference]: Start difference. First operand has 264 places, 430 transitions, 7494 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:53:00,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 488 transitions, 9288 flow [2024-06-14 12:53:02,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 488 transitions, 8941 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 12:53:02,253 INFO L231 Difference]: Finished difference. Result has 266 places, 434 transitions, 7655 flow [2024-06-14 12:53:02,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7147, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7655, PETRI_PLACES=266, PETRI_TRANSITIONS=434} [2024-06-14 12:53:02,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 12:53:02,254 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 434 transitions, 7655 flow [2024-06-14 12:53:02,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:02,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:02,254 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 12:53:02,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:53:02,254 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:02,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:02,255 INFO L85 PathProgramCache]: Analyzing trace with hash -760241152, now seen corresponding path program 10 times [2024-06-14 12:53:02,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:02,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058857613] [2024-06-14 12:53:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:02,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:03,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058857613] [2024-06-14 12:53:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058857613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:53:03,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155641468] [2024-06-14 12:53:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:03,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:53:03,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:53:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:53:03,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:03,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 434 transitions, 7655 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:03,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:03,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:03,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:06,191 INFO L124 PetriNetUnfolderBase]: 8375/13026 cut-off events. [2024-06-14 12:53:06,191 INFO L125 PetriNetUnfolderBase]: For 959396/959409 co-relation queries the response was YES. [2024-06-14 12:53:06,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112419 conditions, 13026 events. 8375/13026 cut-off events. For 959396/959409 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 84763 event pairs, 2814 based on Foata normal form. 26/13047 useless extension candidates. Maximal degree in co-relation 112285. Up to 12461 conditions per place. [2024-06-14 12:53:06,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 394 selfloop transitions, 74 changer transitions 0/471 dead transitions. [2024-06-14 12:53:06,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 471 transitions, 8748 flow [2024-06-14 12:53:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:06,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:53:06,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 12:53:06,350 INFO L175 Difference]: Start difference. First operand has 266 places, 434 transitions, 7655 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:53:06,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 471 transitions, 8748 flow [2024-06-14 12:53:08,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 471 transitions, 8298 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-14 12:53:08,238 INFO L231 Difference]: Finished difference. Result has 267 places, 434 transitions, 7363 flow [2024-06-14 12:53:08,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7205, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7363, PETRI_PLACES=267, PETRI_TRANSITIONS=434} [2024-06-14 12:53:08,239 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 12:53:08,239 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 434 transitions, 7363 flow [2024-06-14 12:53:08,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:08,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:08,239 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 12:53:08,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:53:08,239 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 12:53:08,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 825083980, now seen corresponding path program 1 times [2024-06-14 12:53:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:08,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639361277] [2024-06-14 12:53:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:08,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:08,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:08,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639361277] [2024-06-14 12:53:08,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639361277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:08,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604073708] [2024-06-14 12:53:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:08,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:08,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 434 transitions, 7363 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:08,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:08,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:08,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:11,929 INFO L124 PetriNetUnfolderBase]: 8369/13015 cut-off events. [2024-06-14 12:53:11,929 INFO L125 PetriNetUnfolderBase]: For 941567/941580 co-relation queries the response was YES. [2024-06-14 12:53:12,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110971 conditions, 13015 events. 8369/13015 cut-off events. For 941567/941580 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 84758 event pairs, 2981 based on Foata normal form. 12/13023 useless extension candidates. Maximal degree in co-relation 110837. Up to 12941 conditions per place. [2024-06-14 12:53:12,095 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 421 selfloop transitions, 25 changer transitions 0/449 dead transitions. [2024-06-14 12:53:12,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 449 transitions, 8361 flow [2024-06-14 12:53:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:53:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:53:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-14 12:53:12,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 12:53:12,096 INFO L175 Difference]: Start difference. First operand has 267 places, 434 transitions, 7363 flow. Second operand 6 states and 94 transitions. [2024-06-14 12:53:12,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 449 transitions, 8361 flow [2024-06-14 12:53:13,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 449 transitions, 8211 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:13,922 INFO L231 Difference]: Finished difference. Result has 266 places, 437 transitions, 7334 flow [2024-06-14 12:53:13,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7213, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7334, PETRI_PLACES=266, PETRI_TRANSITIONS=437} [2024-06-14 12:53:13,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 12:53:13,923 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 437 transitions, 7334 flow [2024-06-14 12:53:13,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:13,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:13,923 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 12:53:13,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:53:13,923 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 12:53:13,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1924265316, now seen corresponding path program 1 times [2024-06-14 12:53:13,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:13,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548537205] [2024-06-14 12:53:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:14,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:14,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548537205] [2024-06-14 12:53:14,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548537205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:14,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:14,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:14,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865782679] [2024-06-14 12:53:14,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:14,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:14,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:14,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:14,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 437 transitions, 7334 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:14,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:14,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:14,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:17,640 INFO L124 PetriNetUnfolderBase]: 8390/13046 cut-off events. [2024-06-14 12:53:17,640 INFO L125 PetriNetUnfolderBase]: For 972680/972680 co-relation queries the response was YES. [2024-06-14 12:53:17,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112324 conditions, 13046 events. 8390/13046 cut-off events. For 972680/972680 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 85006 event pairs, 3088 based on Foata normal form. 1/13045 useless extension candidates. Maximal degree in co-relation 112189. Up to 12918 conditions per place. [2024-06-14 12:53:17,786 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 439 selfloop transitions, 37 changer transitions 0/479 dead transitions. [2024-06-14 12:53:17,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 479 transitions, 9120 flow [2024-06-14 12:53:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:53:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:53:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:53:17,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:53:17,787 INFO L175 Difference]: Start difference. First operand has 266 places, 437 transitions, 7334 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:53:17,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 479 transitions, 9120 flow [2024-06-14 12:53:19,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 479 transitions, 9025 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:53:19,709 INFO L231 Difference]: Finished difference. Result has 272 places, 458 transitions, 7932 flow [2024-06-14 12:53:19,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7241, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7932, PETRI_PLACES=272, PETRI_TRANSITIONS=458} [2024-06-14 12:53:19,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 12:53:19,710 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 458 transitions, 7932 flow [2024-06-14 12:53:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:19,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:19,710 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 12:53:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:53:19,710 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 12:53:19,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1924145346, now seen corresponding path program 2 times [2024-06-14 12:53:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095923812] [2024-06-14 12:53:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095923812] [2024-06-14 12:53:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095923812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:20,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:20,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557490479] [2024-06-14 12:53:20,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:20,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:20,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:20,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:20,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 458 transitions, 7932 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:20,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:20,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:20,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:23,529 INFO L124 PetriNetUnfolderBase]: 8508/13209 cut-off events. [2024-06-14 12:53:23,529 INFO L125 PetriNetUnfolderBase]: For 1034511/1034524 co-relation queries the response was YES. [2024-06-14 12:53:23,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116098 conditions, 13209 events. 8508/13209 cut-off events. For 1034511/1034524 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 85976 event pairs, 3023 based on Foata normal form. 16/13221 useless extension candidates. Maximal degree in co-relation 115959. Up to 13007 conditions per place. [2024-06-14 12:53:23,823 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 436 selfloop transitions, 61 changer transitions 0/500 dead transitions. [2024-06-14 12:53:23,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 500 transitions, 9644 flow [2024-06-14 12:53:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:53:23,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:53:23,825 INFO L175 Difference]: Start difference. First operand has 272 places, 458 transitions, 7932 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:53:23,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 500 transitions, 9644 flow [2024-06-14 12:53:25,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 500 transitions, 9354 flow, removed 144 selfloop flow, removed 1 redundant places. [2024-06-14 12:53:25,617 INFO L231 Difference]: Finished difference. Result has 280 places, 481 transitions, 8369 flow [2024-06-14 12:53:25,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7658, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8369, PETRI_PLACES=280, PETRI_TRANSITIONS=481} [2024-06-14 12:53:25,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-14 12:53:25,618 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 481 transitions, 8369 flow [2024-06-14 12:53:25,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:25,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:25,618 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 12:53:25,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:53:25,618 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 12:53:25,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -846854048, now seen corresponding path program 1 times [2024-06-14 12:53:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110363244] [2024-06-14 12:53:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:26,344 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 12:53:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110363244] [2024-06-14 12:53:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110363244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:26,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:26,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685729852] [2024-06-14 12:53:26,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:26,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:26,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:26,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 481 transitions, 8369 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:26,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:26,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:26,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:29,494 INFO L124 PetriNetUnfolderBase]: 8460/13143 cut-off events. [2024-06-14 12:53:29,494 INFO L125 PetriNetUnfolderBase]: For 1061753/1061766 co-relation queries the response was YES. [2024-06-14 12:53:29,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116101 conditions, 13143 events. 8460/13143 cut-off events. For 1061753/1061766 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 85496 event pairs, 2971 based on Foata normal form. 22/13161 useless extension candidates. Maximal degree in co-relation 115958. Up to 12968 conditions per place. [2024-06-14 12:53:29,651 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 435 selfloop transitions, 61 changer transitions 0/499 dead transitions. [2024-06-14 12:53:29,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 499 transitions, 9433 flow [2024-06-14 12:53:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:53:29,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 12:53:29,652 INFO L175 Difference]: Start difference. First operand has 280 places, 481 transitions, 8369 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:53:29,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 499 transitions, 9433 flow [2024-06-14 12:53:31,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 499 transitions, 9055 flow, removed 181 selfloop flow, removed 2 redundant places. [2024-06-14 12:53:31,620 INFO L231 Difference]: Finished difference. Result has 286 places, 481 transitions, 8132 flow [2024-06-14 12:53:31,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8132, PETRI_PLACES=286, PETRI_TRANSITIONS=481} [2024-06-14 12:53:31,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-14 12:53:31,621 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 481 transitions, 8132 flow [2024-06-14 12:53:31,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:31,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:31,621 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 12:53:31,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:53:31,622 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 12:53:31,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:31,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2044137652, now seen corresponding path program 2 times [2024-06-14 12:53:31,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:31,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960165008] [2024-06-14 12:53:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:31,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960165008] [2024-06-14 12:53:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960165008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:32,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:32,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028997385] [2024-06-14 12:53:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:32,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:32,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:32,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:32,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:32,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:53:32,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 481 transitions, 8132 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:32,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:32,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:53:32,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand