./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_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/mix025_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/mix025_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix025_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 12:10:41,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:10:41,889 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:10:41,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:10:41,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:10:41,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:10:41,917 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:10:41,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:10:41,918 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:10:41,921 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:10:41,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:10:41,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:10:41,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:10:41,923 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:10:41,923 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:10:41,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:10:41,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:10:41,924 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:10:41,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:10:41,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:10:41,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:10:41,924 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:10:41,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:10:41,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:10:41,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:10:41,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:10:41,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:10:41,925 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:10:41,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:10:41,926 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:10:41,926 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:10:41,927 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:10:41,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:10:41,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:10:41,928 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:10:41,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:10:41,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:10:41,928 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:10:42,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:10:42,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:10:42,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:10:42,187 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:10:42,188 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:10:42,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix025_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:10:42,335 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:10:42,335 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:10:42,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-14 12:10:43,322 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:10:43,592 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:10:43,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-14 12:10:43,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc56942c7/f23dc68207544a69bdcee53f8ad92b2e/FLAGb834631c8 [2024-06-14 12:10:43,626 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc56942c7/f23dc68207544a69bdcee53f8ad92b2e [2024-06-14 12:10:43,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:10:43,627 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:10:43,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:10:43,642 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:10:43,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:10:43,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:10:42" (1/2) ... [2024-06-14 12:10:43,647 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736af959 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:10:43, skipping insertion in model container [2024-06-14 12:10:43,647 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:10:42" (1/2) ... [2024-06-14 12:10:43,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1990ac4d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:10:43, skipping insertion in model container [2024-06-14 12:10:43,648 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:10:43" (2/2) ... [2024-06-14 12:10:43,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736af959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:43, skipping insertion in model container [2024-06-14 12:10:43,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:10:43" (2/2) ... [2024-06-14 12:10:43,649 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:10:43,715 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:10:43,716 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 12:10:43,716 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 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 || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 12:10:43,716 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-14 12:10:43,716 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:10:43,717 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-14 12:10:43,750 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:10:43,954 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:10:43,967 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:10:44,069 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:10:44,100 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:10:44,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44 WrapperNode [2024-06-14 12:10:44,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:10:44,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:10:44,104 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:10:44,104 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:10:44,109 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,132 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,193 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-14 12:10:44,193 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:10:44,194 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:10:44,194 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:10:44,194 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:10:44,202 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,205 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,217 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 12:10:44,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:10:44,232 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:10:44,232 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:10:44,232 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:10:44,232 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (1/1) ... [2024-06-14 12:10:44,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:10:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:10:44,275 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 12:10:44,281 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 12:10:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:10:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:10:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:10:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:10:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:10:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:10:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:10:44,311 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:10:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:10:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:10:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:10:44,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:10:44,313 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 12:10:44,450 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:10:44,452 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:10:44,725 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:10:44,726 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:10:44,857 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:10:44,857 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:10:44,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:10:44 BoogieIcfgContainer [2024-06-14 12:10:44,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:10:44,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:10:44,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:10:44,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:10:44,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:10:42" (1/4) ... [2024-06-14 12:10:44,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24756500 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:10:44, skipping insertion in model container [2024-06-14 12:10:44,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:10:43" (2/4) ... [2024-06-14 12:10:44,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24756500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:10:44, skipping insertion in model container [2024-06-14 12:10:44,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:44" (3/4) ... [2024-06-14 12:10:44,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24756500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:10:44, skipping insertion in model container [2024-06-14 12:10:44,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:10:44" (4/4) ... [2024-06-14 12:10:44,865 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_pso.opt_rmo.opt.i [2024-06-14 12:10:44,879 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:10:44,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:10:44,879 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:10:44,940 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:10:44,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:10:45,001 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:10:45,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:10:45,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:10:45,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:10:45,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:10:45,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:10:45,019 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;@63136059, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:10:45,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:10:45,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:10:45,025 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:10:45,025 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:10:45,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:45,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:10:45,026 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 12:10:45,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:45,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1649445791, now seen corresponding path program 1 times [2024-06-14 12:10:45,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:45,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883469159] [2024-06-14 12:10:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:45,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:45,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883469159] [2024-06-14 12:10:45,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883469159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:45,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:45,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:10:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753352876] [2024-06-14 12:10:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:45,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:10:45,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:10:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:10:46,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-14 12:10:46,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:46,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:46,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-14 12:10:46,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:46,328 INFO L124 PetriNetUnfolderBase]: 1152/1853 cut-off events. [2024-06-14 12:10:46,328 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:10:46,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3672 conditions, 1853 events. 1152/1853 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9218 event pairs, 785 based on Foata normal form. 1/1779 useless extension candidates. Maximal degree in co-relation 3657. Up to 1732 conditions per place. [2024-06-14 12:10:46,340 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:10:46,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-14 12:10:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:10:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:10:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-14 12:10:46,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 12:10:46,351 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-14 12:10:46,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-14 12:10:46,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:46,361 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:10:46,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 12:10:46,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:10:46,365 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:10:46,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:46,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:46,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:46,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:10:46,366 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 12:10:46,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -274434560, now seen corresponding path program 1 times [2024-06-14 12:10:46,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:46,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394887913] [2024-06-14 12:10:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:46,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394887913] [2024-06-14 12:10:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394887913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:46,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:46,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:10:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281755450] [2024-06-14 12:10:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:10:46,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:10:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:10:47,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:10:47,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:47,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:47,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:10:47,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:47,310 INFO L124 PetriNetUnfolderBase]: 1347/2082 cut-off events. [2024-06-14 12:10:47,310 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-14 12:10:47,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4725 conditions, 2082 events. 1347/2082 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10031 event pairs, 649 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 4710. Up to 1981 conditions per place. [2024-06-14 12:10:47,322 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:10:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 248 flow [2024-06-14 12:10:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:10:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:10:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 12:10:47,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 12:10:47,326 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-14 12:10:47,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 248 flow [2024-06-14 12:10:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:47,329 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:10:47,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:10:47,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:10:47,330 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:10:47,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:47,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:47,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:47,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:10:47,333 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 12:10:47,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1939006827, now seen corresponding path program 1 times [2024-06-14 12:10:47,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:47,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482889032] [2024-06-14 12:10:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:48,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:48,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482889032] [2024-06-14 12:10:48,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482889032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:48,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:48,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:10:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990193024] [2024-06-14 12:10:48,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:48,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:10:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:48,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:10:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:10:48,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:10:48,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:48,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:48,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:10:48,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:48,810 INFO L124 PetriNetUnfolderBase]: 1338/2067 cut-off events. [2024-06-14 12:10:48,811 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-14 12:10:48,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5218 conditions, 2067 events. 1338/2067 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9932 event pairs, 485 based on Foata normal form. 6/2062 useless extension candidates. Maximal degree in co-relation 5201. Up to 1936 conditions per place. [2024-06-14 12:10:48,821 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-14 12:10:48,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 354 flow [2024-06-14 12:10:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 12:10:48,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 12:10:48,824 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 133 transitions. [2024-06-14 12:10:48,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 354 flow [2024-06-14 12:10:48,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 334 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 12:10:48,826 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-14 12:10:48,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-14 12:10:48,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-14 12:10:48,827 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-14 12:10:48,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:48,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:48,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:10:48,828 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 12:10:48,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1182824873, now seen corresponding path program 1 times [2024-06-14 12:10:48,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:48,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324755089] [2024-06-14 12:10:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:48,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:49,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324755089] [2024-06-14 12:10:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324755089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:49,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:10:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685401244] [2024-06-14 12:10:49,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:49,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:10:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:10:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:10:49,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:10:49,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 12:10:49,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:49,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:10:49,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:49,813 INFO L124 PetriNetUnfolderBase]: 1126/1833 cut-off events. [2024-06-14 12:10:49,814 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-14 12:10:49,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5002 conditions, 1833 events. 1126/1833 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9177 event pairs, 487 based on Foata normal form. 2/1804 useless extension candidates. Maximal degree in co-relation 4983. Up to 1683 conditions per place. [2024-06-14 12:10:49,841 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-14 12:10:49,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 325 flow [2024-06-14 12:10:49,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:10:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:10:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-14 12:10:49,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 12:10:49,845 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 100 transitions. [2024-06-14 12:10:49,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 325 flow [2024-06-14 12:10:49,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:49,849 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-14 12:10:49,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 12:10:49,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 12:10:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-14 12:10:49,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 12:10:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:49,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:10:49,852 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 12:10:49,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1961215675, now seen corresponding path program 1 times [2024-06-14 12:10:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:49,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130398450] [2024-06-14 12:10:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:50,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:50,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130398450] [2024-06-14 12:10:50,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130398450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:50,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:50,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:50,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015715015] [2024-06-14 12:10:50,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:50,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:50,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:50,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:50,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:50,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:50,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:50,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:50,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:50,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:50,938 INFO L124 PetriNetUnfolderBase]: 1335/2074 cut-off events. [2024-06-14 12:10:50,938 INFO L125 PetriNetUnfolderBase]: For 3047/3047 co-relation queries the response was YES. [2024-06-14 12:10:50,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 2074 events. 1335/2074 cut-off events. For 3047/3047 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10008 event pairs, 569 based on Foata normal form. 3/2076 useless extension candidates. Maximal degree in co-relation 6162. Up to 1955 conditions per place. [2024-06-14 12:10:50,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-14 12:10:50,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 444 flow [2024-06-14 12:10:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:10:50,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:10:50,951 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:10:50,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 444 flow [2024-06-14 12:10:50,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 424 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:50,954 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 299 flow [2024-06-14 12:10:50,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-14 12:10:50,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 12:10:50,955 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 299 flow [2024-06-14 12:10:50,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:50,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:50,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:50,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:10:50,956 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 12:10:50,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1477328120, now seen corresponding path program 1 times [2024-06-14 12:10:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:50,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586439061] [2024-06-14 12:10:50,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:51,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586439061] [2024-06-14 12:10:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586439061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:51,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:51,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637520978] [2024-06-14 12:10:51,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:51,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:51,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:51,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:51,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:51,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:51,943 INFO L124 PetriNetUnfolderBase]: 1409/2192 cut-off events. [2024-06-14 12:10:51,944 INFO L125 PetriNetUnfolderBase]: For 5223/5233 co-relation queries the response was YES. [2024-06-14 12:10:51,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7381 conditions, 2192 events. 1409/2192 cut-off events. For 5223/5233 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10615 event pairs, 568 based on Foata normal form. 4/2184 useless extension candidates. Maximal degree in co-relation 7357. Up to 2047 conditions per place. [2024-06-14 12:10:51,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-14 12:10:51,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 513 flow [2024-06-14 12:10:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:10:51,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:10:51,957 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 299 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:10:51,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 513 flow [2024-06-14 12:10:51,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 499 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:51,962 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 343 flow [2024-06-14 12:10:51,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 12:10:51,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-14 12:10:51,963 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 343 flow [2024-06-14 12:10:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:51,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:51,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:51,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:10:51,963 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 12:10:51,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1471614200, now seen corresponding path program 2 times [2024-06-14 12:10:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615869863] [2024-06-14 12:10:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:51,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:52,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615869863] [2024-06-14 12:10:52,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615869863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:52,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:52,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415193456] [2024-06-14 12:10:52,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:52,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:52,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:52,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:52,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:52,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:52,967 INFO L124 PetriNetUnfolderBase]: 1415/2208 cut-off events. [2024-06-14 12:10:52,967 INFO L125 PetriNetUnfolderBase]: For 7055/7071 co-relation queries the response was YES. [2024-06-14 12:10:52,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 2208 events. 1415/2208 cut-off events. For 7055/7071 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10705 event pairs, 575 based on Foata normal form. 8/2204 useless extension candidates. Maximal degree in co-relation 7935. Up to 2029 conditions per place. [2024-06-14 12:10:52,988 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-14 12:10:52,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 561 flow [2024-06-14 12:10:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:10:52,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:10:52,989 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 343 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:10:52,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 561 flow [2024-06-14 12:10:52,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 527 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:52,995 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 383 flow [2024-06-14 12:10:52,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-14 12:10:52,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 12:10:52,996 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 383 flow [2024-06-14 12:10:52,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:52,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:52,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:52,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:10:52,996 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 12:10:52,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:52,997 INFO L85 PathProgramCache]: Analyzing trace with hash -668142994, now seen corresponding path program 1 times [2024-06-14 12:10:52,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:52,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390516226] [2024-06-14 12:10:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:52,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:53,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:53,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390516226] [2024-06-14 12:10:53,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390516226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:53,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:53,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124137707] [2024-06-14 12:10:53,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:53,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:53,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:53,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 383 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 12:10:53,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:53,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:53,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:54,310 INFO L124 PetriNetUnfolderBase]: 1365/2149 cut-off events. [2024-06-14 12:10:54,311 INFO L125 PetriNetUnfolderBase]: For 8574/8574 co-relation queries the response was YES. [2024-06-14 12:10:54,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8204 conditions, 2149 events. 1365/2149 cut-off events. For 8574/8574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10485 event pairs, 533 based on Foata normal form. 3/2151 useless extension candidates. Maximal degree in co-relation 8176. Up to 1986 conditions per place. [2024-06-14 12:10:54,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-14 12:10:54,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 659 flow [2024-06-14 12:10:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:10:54,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 12:10:54,325 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 383 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:10:54,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 659 flow [2024-06-14 12:10:54,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 609 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:54,330 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 422 flow [2024-06-14 12:10:54,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-14 12:10:54,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-14 12:10:54,331 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 422 flow [2024-06-14 12:10:54,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 12:10:54,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:54,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:54,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:10:54,331 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 12:10:54,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1447349136, now seen corresponding path program 1 times [2024-06-14 12:10:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908632399] [2024-06-14 12:10:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:55,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908632399] [2024-06-14 12:10:55,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908632399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:55,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:55,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969441584] [2024-06-14 12:10:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:55,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:55,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:55,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 422 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 12:10:55,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:55,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:55,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:55,684 INFO L124 PetriNetUnfolderBase]: 1445/2234 cut-off events. [2024-06-14 12:10:55,684 INFO L125 PetriNetUnfolderBase]: For 11854/11873 co-relation queries the response was YES. [2024-06-14 12:10:55,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9188 conditions, 2234 events. 1445/2234 cut-off events. For 11854/11873 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10640 event pairs, 571 based on Foata normal form. 3/2230 useless extension candidates. Maximal degree in co-relation 9159. Up to 2071 conditions per place. [2024-06-14 12:10:55,697 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-14 12:10:55,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 694 flow [2024-06-14 12:10:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:10:55,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-14 12:10:55,699 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 422 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:10:55,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 694 flow [2024-06-14 12:10:55,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 635 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:55,706 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 441 flow [2024-06-14 12:10:55,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-14 12:10:55,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-14 12:10:55,707 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 441 flow [2024-06-14 12:10:55,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 12:10:55,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:55,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:10:55,708 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 12:10:55,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1447469292, now seen corresponding path program 1 times [2024-06-14 12:10:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:55,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235497774] [2024-06-14 12:10:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:56,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:56,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235497774] [2024-06-14 12:10:56,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235497774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:56,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:56,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516260424] [2024-06-14 12:10:56,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:56,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:56,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:56,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:56,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:56,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:56,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:56,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:56,934 INFO L124 PetriNetUnfolderBase]: 1635/2455 cut-off events. [2024-06-14 12:10:56,934 INFO L125 PetriNetUnfolderBase]: For 15036/15036 co-relation queries the response was YES. [2024-06-14 12:10:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10605 conditions, 2455 events. 1635/2455 cut-off events. For 15036/15036 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11464 event pairs, 592 based on Foata normal form. 6/2460 useless extension candidates. Maximal degree in co-relation 10575. Up to 2319 conditions per place. [2024-06-14 12:10:56,950 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 82 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-06-14 12:10:56,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 865 flow [2024-06-14 12:10:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:10:56,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 12:10:56,952 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 441 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:10:56,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 865 flow [2024-06-14 12:10:56,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 811 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:56,959 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 563 flow [2024-06-14 12:10:56,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2024-06-14 12:10:56,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-14 12:10:56,960 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 563 flow [2024-06-14 12:10:56,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:56,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:56,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:10:56,960 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 12:10:56,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 762158406, now seen corresponding path program 2 times [2024-06-14 12:10:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:56,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930360081] [2024-06-14 12:10:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:57,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:57,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930360081] [2024-06-14 12:10:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930360081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:57,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:57,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169748287] [2024-06-14 12:10:57,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:57,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:57,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:57,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 563 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:57,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:57,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:57,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:58,092 INFO L124 PetriNetUnfolderBase]: 1703/2564 cut-off events. [2024-06-14 12:10:58,092 INFO L125 PetriNetUnfolderBase]: For 20572/20576 co-relation queries the response was YES. [2024-06-14 12:10:58,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12233 conditions, 2564 events. 1703/2564 cut-off events. For 20572/20576 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12143 event pairs, 609 based on Foata normal form. 10/2573 useless extension candidates. Maximal degree in co-relation 12200. Up to 2270 conditions per place. [2024-06-14 12:10:58,108 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 78 selfloop transitions, 34 changer transitions 0/116 dead transitions. [2024-06-14 12:10:58,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 116 transitions, 1051 flow [2024-06-14 12:10:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:10:58,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-14 12:10:58,110 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 563 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:10:58,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 116 transitions, 1051 flow [2024-06-14 12:10:58,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 993 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 12:10:58,123 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 697 flow [2024-06-14 12:10:58,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=697, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2024-06-14 12:10:58,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-14 12:10:58,124 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 697 flow [2024-06-14 12:10:58,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:58,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:58,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:58,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:10:58,124 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 12:10:58,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1624837962, now seen corresponding path program 3 times [2024-06-14 12:10:58,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:58,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478330706] [2024-06-14 12:10:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:58,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:58,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478330706] [2024-06-14 12:10:58,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478330706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:58,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:58,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:58,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724566957] [2024-06-14 12:10:58,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:58,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:58,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:58,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:58,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:58,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 697 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:58,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:58,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:58,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:59,203 INFO L124 PetriNetUnfolderBase]: 1707/2568 cut-off events. [2024-06-14 12:10:59,203 INFO L125 PetriNetUnfolderBase]: For 24547/24551 co-relation queries the response was YES. [2024-06-14 12:10:59,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12968 conditions, 2568 events. 1707/2568 cut-off events. For 24547/24551 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12154 event pairs, 599 based on Foata normal form. 10/2577 useless extension candidates. Maximal degree in co-relation 12932. Up to 2279 conditions per place. [2024-06-14 12:10:59,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 71 selfloop transitions, 42 changer transitions 0/117 dead transitions. [2024-06-14 12:10:59,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 117 transitions, 1090 flow [2024-06-14 12:10:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:10:59,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 12:10:59,220 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 697 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:10:59,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 117 transitions, 1090 flow [2024-06-14 12:10:59,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 117 transitions, 977 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:59,235 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 738 flow [2024-06-14 12:10:59,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=738, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-06-14 12:10:59,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:10:59,236 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 738 flow [2024-06-14 12:10:59,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:59,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:59,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:59,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:10:59,238 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 12:10:59,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:59,238 INFO L85 PathProgramCache]: Analyzing trace with hash 762404484, now seen corresponding path program 1 times [2024-06-14 12:10:59,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:59,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019996604] [2024-06-14 12:10:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:59,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:00,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:00,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019996604] [2024-06-14 12:11:00,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019996604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:00,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:00,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57838788] [2024-06-14 12:11:00,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:00,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:00,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:00,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:00,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:00,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:00,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:00,707 INFO L124 PetriNetUnfolderBase]: 1503/2364 cut-off events. [2024-06-14 12:11:00,707 INFO L125 PetriNetUnfolderBase]: For 22245/22245 co-relation queries the response was YES. [2024-06-14 12:11:00,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11591 conditions, 2364 events. 1503/2364 cut-off events. For 22245/22245 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11604 event pairs, 506 based on Foata normal form. 6/2369 useless extension candidates. Maximal degree in co-relation 11554. Up to 2157 conditions per place. [2024-06-14 12:11:00,721 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 24 changer transitions 0/122 dead transitions. [2024-06-14 12:11:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 1128 flow [2024-06-14 12:11:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:11:00,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-14 12:11:00,723 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 738 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:11:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 1128 flow [2024-06-14 12:11:00,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 1041 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:00,738 INFO L231 Difference]: Finished difference. Result has 86 places, 96 transitions, 757 flow [2024-06-14 12:11:00,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=86, PETRI_TRANSITIONS=96} [2024-06-14 12:11:00,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 12:11:00,739 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 96 transitions, 757 flow [2024-06-14 12:11:00,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:00,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:00,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:00,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:11:00,740 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:00,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1354377716, now seen corresponding path program 1 times [2024-06-14 12:11:00,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:00,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493470952] [2024-06-14 12:11:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:01,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:01,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493470952] [2024-06-14 12:11:01,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493470952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:01,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:01,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:11:01,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699392799] [2024-06-14 12:11:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:01,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:11:01,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:11:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:11:01,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:01,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 96 transitions, 757 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:01,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:01,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:01,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:01,664 INFO L124 PetriNetUnfolderBase]: 1500/2359 cut-off events. [2024-06-14 12:11:01,664 INFO L125 PetriNetUnfolderBase]: For 24157/24157 co-relation queries the response was YES. [2024-06-14 12:11:01,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11784 conditions, 2359 events. 1500/2359 cut-off events. For 24157/24157 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11579 event pairs, 525 based on Foata normal form. 1/2359 useless extension candidates. Maximal degree in co-relation 11746. Up to 2226 conditions per place. [2024-06-14 12:11:01,677 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 91 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2024-06-14 12:11:01,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 104 transitions, 975 flow [2024-06-14 12:11:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:11:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:11:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 12:11:01,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 12:11:01,678 INFO L175 Difference]: Start difference. First operand has 86 places, 96 transitions, 757 flow. Second operand 5 states and 92 transitions. [2024-06-14 12:11:01,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 104 transitions, 975 flow [2024-06-14 12:11:01,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 104 transitions, 887 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:01,691 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 691 flow [2024-06-14 12:11:01,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=691, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-06-14 12:11:01,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-14 12:11:01,691 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 691 flow [2024-06-14 12:11:01,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:01,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:01,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:01,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:11:01,692 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 12:11:01,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1918151012, now seen corresponding path program 1 times [2024-06-14 12:11:01,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:01,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422193208] [2024-06-14 12:11:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422193208] [2024-06-14 12:11:02,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422193208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:02,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:02,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927014222] [2024-06-14 12:11:02,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:02,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:02,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:02,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:02,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 691 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:02,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:02,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:02,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:03,137 INFO L124 PetriNetUnfolderBase]: 1709/2573 cut-off events. [2024-06-14 12:11:03,137 INFO L125 PetriNetUnfolderBase]: For 30720/30720 co-relation queries the response was YES. [2024-06-14 12:11:03,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13077 conditions, 2573 events. 1709/2573 cut-off events. For 30720/30720 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12130 event pairs, 591 based on Foata normal form. 3/2575 useless extension candidates. Maximal degree in co-relation 13038. Up to 2450 conditions per place. [2024-06-14 12:11:03,149 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 27 changer transitions 0/139 dead transitions. [2024-06-14 12:11:03,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 139 transitions, 1259 flow [2024-06-14 12:11:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:11:03,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-14 12:11:03,150 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 691 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:11:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 139 transitions, 1259 flow [2024-06-14 12:11:03,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 139 transitions, 1237 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:03,165 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 895 flow [2024-06-14 12:11:03,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-14 12:11:03,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-14 12:11:03,166 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 895 flow [2024-06-14 12:11:03,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:03,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:03,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:03,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:11:03,167 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 12:11:03,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:03,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1769269935, now seen corresponding path program 1 times [2024-06-14 12:11:03,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:03,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55979377] [2024-06-14 12:11:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:03,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:04,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55979377] [2024-06-14 12:11:04,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55979377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:04,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:04,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582275929] [2024-06-14 12:11:04,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:04,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:04,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:04,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 895 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:04,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:04,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:04,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:04,714 INFO L124 PetriNetUnfolderBase]: 1855/2791 cut-off events. [2024-06-14 12:11:04,715 INFO L125 PetriNetUnfolderBase]: For 38308/38310 co-relation queries the response was YES. [2024-06-14 12:11:04,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15008 conditions, 2791 events. 1855/2791 cut-off events. For 38308/38310 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13204 event pairs, 602 based on Foata normal form. 8/2798 useless extension candidates. Maximal degree in co-relation 14967. Up to 2602 conditions per place. [2024-06-14 12:11:04,731 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 122 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-14 12:11:04,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 160 transitions, 1611 flow [2024-06-14 12:11:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:11:04,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:11:04,733 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 895 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:11:04,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 160 transitions, 1611 flow [2024-06-14 12:11:04,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 160 transitions, 1514 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:11:04,757 INFO L231 Difference]: Finished difference. Result has 101 places, 130 transitions, 1170 flow [2024-06-14 12:11:04,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1170, PETRI_PLACES=101, PETRI_TRANSITIONS=130} [2024-06-14 12:11:04,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 12:11:04,757 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 130 transitions, 1170 flow [2024-06-14 12:11:04,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:04,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:04,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:04,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:11:04,758 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 12:11:04,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:04,759 INFO L85 PathProgramCache]: Analyzing trace with hash 629644109, now seen corresponding path program 2 times [2024-06-14 12:11:04,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:04,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167473857] [2024-06-14 12:11:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:05,619 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 12:11:05,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:05,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167473857] [2024-06-14 12:11:05,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167473857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:05,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:05,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:05,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033739813] [2024-06-14 12:11:05,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:05,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:05,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:05,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:05,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 130 transitions, 1170 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:05,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:05,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:05,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:06,212 INFO L124 PetriNetUnfolderBase]: 2008/3010 cut-off events. [2024-06-14 12:11:06,212 INFO L125 PetriNetUnfolderBase]: For 45253/45253 co-relation queries the response was YES. [2024-06-14 12:11:06,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17463 conditions, 3010 events. 2008/3010 cut-off events. For 45253/45253 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14303 event pairs, 587 based on Foata normal form. 6/3015 useless extension candidates. Maximal degree in co-relation 17416. Up to 2736 conditions per place. [2024-06-14 12:11:06,230 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 132 selfloop transitions, 56 changer transitions 0/192 dead transitions. [2024-06-14 12:11:06,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 192 transitions, 2086 flow [2024-06-14 12:11:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:11:06,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-14 12:11:06,232 INFO L175 Difference]: Start difference. First operand has 101 places, 130 transitions, 1170 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:11:06,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 192 transitions, 2086 flow [2024-06-14 12:11:06,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 192 transitions, 1938 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-14 12:11:06,262 INFO L231 Difference]: Finished difference. Result has 111 places, 157 transitions, 1578 flow [2024-06-14 12:11:06,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1578, PETRI_PLACES=111, PETRI_TRANSITIONS=157} [2024-06-14 12:11:06,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-14 12:11:06,263 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 157 transitions, 1578 flow [2024-06-14 12:11:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:06,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:06,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:06,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:11:06,263 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 12:11:06,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1169363033, now seen corresponding path program 3 times [2024-06-14 12:11:06,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:06,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039694969] [2024-06-14 12:11:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:06,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:07,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039694969] [2024-06-14 12:11:07,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039694969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:07,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:07,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:07,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319240913] [2024-06-14 12:11:07,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:07,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:07,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:07,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:07,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:07,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:07,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 157 transitions, 1578 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:07,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:07,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:07,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:07,761 INFO L124 PetriNetUnfolderBase]: 2076/3111 cut-off events. [2024-06-14 12:11:07,761 INFO L125 PetriNetUnfolderBase]: For 52678/52678 co-relation queries the response was YES. [2024-06-14 12:11:07,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19184 conditions, 3111 events. 2076/3111 cut-off events. For 52678/52678 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14908 event pairs, 553 based on Foata normal form. 6/3116 useless extension candidates. Maximal degree in co-relation 19132. Up to 2431 conditions per place. [2024-06-14 12:11:07,781 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 87 selfloop transitions, 110 changer transitions 0/201 dead transitions. [2024-06-14 12:11:07,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 201 transitions, 2388 flow [2024-06-14 12:11:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:11:07,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:11:07,782 INFO L175 Difference]: Start difference. First operand has 111 places, 157 transitions, 1578 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:11:07,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 201 transitions, 2388 flow [2024-06-14 12:11:07,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 201 transitions, 2223 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:07,814 INFO L231 Difference]: Finished difference. Result has 115 places, 167 transitions, 1854 flow [2024-06-14 12:11:07,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1854, PETRI_PLACES=115, PETRI_TRANSITIONS=167} [2024-06-14 12:11:07,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-14 12:11:07,815 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 167 transitions, 1854 flow [2024-06-14 12:11:07,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:07,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:07,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:11:07,816 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 12:11:07,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:07,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2142892403, now seen corresponding path program 4 times [2024-06-14 12:11:07,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:07,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650567934] [2024-06-14 12:11:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:08,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:08,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650567934] [2024-06-14 12:11:08,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650567934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:08,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:08,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:08,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707427429] [2024-06-14 12:11:08,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:08,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:08,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:08,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:08,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 167 transitions, 1854 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:08,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:08,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:08,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:09,302 INFO L124 PetriNetUnfolderBase]: 2088/3130 cut-off events. [2024-06-14 12:11:09,302 INFO L125 PetriNetUnfolderBase]: For 59094/59094 co-relation queries the response was YES. [2024-06-14 12:11:09,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20771 conditions, 3130 events. 2088/3130 cut-off events. For 59094/59094 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14952 event pairs, 581 based on Foata normal form. 6/3135 useless extension candidates. Maximal degree in co-relation 20717. Up to 2580 conditions per place. [2024-06-14 12:11:09,323 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 124 selfloop transitions, 72 changer transitions 0/200 dead transitions. [2024-06-14 12:11:09,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 200 transitions, 2554 flow [2024-06-14 12:11:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:11:09,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-14 12:11:09,324 INFO L175 Difference]: Start difference. First operand has 115 places, 167 transitions, 1854 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:11:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 200 transitions, 2554 flow [2024-06-14 12:11:09,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 200 transitions, 2346 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:09,362 INFO L231 Difference]: Finished difference. Result has 118 places, 171 transitions, 1896 flow [2024-06-14 12:11:09,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1896, PETRI_PLACES=118, PETRI_TRANSITIONS=171} [2024-06-14 12:11:09,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 12:11:09,363 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 171 transitions, 1896 flow [2024-06-14 12:11:09,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:09,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:09,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:09,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:11:09,363 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:09,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash -963961832, now seen corresponding path program 1 times [2024-06-14 12:11:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:09,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100865283] [2024-06-14 12:11:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:09,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:09,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:09,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100865283] [2024-06-14 12:11:09,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100865283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:09,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:09,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:09,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984241095] [2024-06-14 12:11:09,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:09,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:09,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:09,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:09,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 171 transitions, 1896 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:09,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:09,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:09,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:10,614 INFO L124 PetriNetUnfolderBase]: 1875/2909 cut-off events. [2024-06-14 12:11:10,614 INFO L125 PetriNetUnfolderBase]: For 52438/52438 co-relation queries the response was YES. [2024-06-14 12:11:10,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19258 conditions, 2909 events. 1875/2909 cut-off events. For 52438/52438 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14362 event pairs, 553 based on Foata normal form. 2/2910 useless extension candidates. Maximal degree in co-relation 19202. Up to 2756 conditions per place. [2024-06-14 12:11:10,633 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 166 selfloop transitions, 12 changer transitions 0/183 dead transitions. [2024-06-14 12:11:10,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 183 transitions, 2304 flow [2024-06-14 12:11:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:11:10,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-14 12:11:10,634 INFO L175 Difference]: Start difference. First operand has 118 places, 171 transitions, 1896 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:11:10,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 183 transitions, 2304 flow [2024-06-14 12:11:10,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 2104 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:10,670 INFO L231 Difference]: Finished difference. Result has 118 places, 174 transitions, 1760 flow [2024-06-14 12:11:10,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1760, PETRI_PLACES=118, PETRI_TRANSITIONS=174} [2024-06-14 12:11:10,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-14 12:11:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 174 transitions, 1760 flow [2024-06-14 12:11:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:10,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:10,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:11:10,671 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 12:11:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash -669721905, now seen corresponding path program 1 times [2024-06-14 12:11:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637828473] [2024-06-14 12:11:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637828473] [2024-06-14 12:11:11,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637828473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:11,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:11,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372652560] [2024-06-14 12:11:11,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:11,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:11,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:11,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:11,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:11,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 174 transitions, 1760 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:11,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:11,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:11,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:12,170 INFO L124 PetriNetUnfolderBase]: 2009/3057 cut-off events. [2024-06-14 12:11:12,170 INFO L125 PetriNetUnfolderBase]: For 63226/63228 co-relation queries the response was YES. [2024-06-14 12:11:12,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20472 conditions, 3057 events. 2009/3057 cut-off events. For 63226/63228 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15007 event pairs, 379 based on Foata normal form. 6/3062 useless extension candidates. Maximal degree in co-relation 20415. Up to 2691 conditions per place. [2024-06-14 12:11:12,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-06-14 12:11:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 2248 flow [2024-06-14 12:11:12,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:11:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:11:12,195 INFO L175 Difference]: Start difference. First operand has 118 places, 174 transitions, 1760 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:11:12,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 2248 flow [2024-06-14 12:11:12,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 205 transitions, 2206 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:12,235 INFO L231 Difference]: Finished difference. Result has 122 places, 176 transitions, 1825 flow [2024-06-14 12:11:12,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1825, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2024-06-14 12:11:12,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-14 12:11:12,236 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 1825 flow [2024-06-14 12:11:12,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:12,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:12,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:11:12,236 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 12:11:12,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash 868935303, now seen corresponding path program 2 times [2024-06-14 12:11:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565114577] [2024-06-14 12:11:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:13,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:13,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565114577] [2024-06-14 12:11:13,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565114577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:13,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:13,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:13,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093714056] [2024-06-14 12:11:13,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:13,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:13,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:13,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:13,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 1825 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:13,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:13,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:13,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:13,844 INFO L124 PetriNetUnfolderBase]: 2026/3084 cut-off events. [2024-06-14 12:11:13,844 INFO L125 PetriNetUnfolderBase]: For 69443/69445 co-relation queries the response was YES. [2024-06-14 12:11:13,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21061 conditions, 3084 events. 2026/3084 cut-off events. For 69443/69445 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15158 event pairs, 502 based on Foata normal form. 6/3089 useless extension candidates. Maximal degree in co-relation 21003. Up to 2744 conditions per place. [2024-06-14 12:11:13,867 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 22 changer transitions 0/206 dead transitions. [2024-06-14 12:11:13,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2317 flow [2024-06-14 12:11:13,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:11:13,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:11:13,869 INFO L175 Difference]: Start difference. First operand has 122 places, 176 transitions, 1825 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:11:13,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2317 flow [2024-06-14 12:11:13,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 2228 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:13,917 INFO L231 Difference]: Finished difference. Result has 124 places, 178 transitions, 1849 flow [2024-06-14 12:11:13,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1849, PETRI_PLACES=124, PETRI_TRANSITIONS=178} [2024-06-14 12:11:13,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 12:11:13,918 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 178 transitions, 1849 flow [2024-06-14 12:11:13,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:13,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:13,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:11:13,918 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 12:11:13,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash -551573775, now seen corresponding path program 3 times [2024-06-14 12:11:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192233961] [2024-06-14 12:11:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:14,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:14,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192233961] [2024-06-14 12:11:14,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192233961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:14,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:14,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:14,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268336607] [2024-06-14 12:11:14,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:14,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:14,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:14,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:14,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:14,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 178 transitions, 1849 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:14,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:14,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:14,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:15,536 INFO L124 PetriNetUnfolderBase]: 2043/3116 cut-off events. [2024-06-14 12:11:15,537 INFO L125 PetriNetUnfolderBase]: For 76810/76812 co-relation queries the response was YES. [2024-06-14 12:11:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21534 conditions, 3116 events. 2043/3116 cut-off events. For 76810/76812 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15414 event pairs, 465 based on Foata normal form. 6/3121 useless extension candidates. Maximal degree in co-relation 21475. Up to 2717 conditions per place. [2024-06-14 12:11:15,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2024-06-14 12:11:15,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 211 transitions, 2406 flow [2024-06-14 12:11:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:11:15,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:11:15,563 INFO L175 Difference]: Start difference. First operand has 124 places, 178 transitions, 1849 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:11:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 211 transitions, 2406 flow [2024-06-14 12:11:15,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2311 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:15,618 INFO L231 Difference]: Finished difference. Result has 127 places, 185 transitions, 1960 flow [2024-06-14 12:11:15,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1960, PETRI_PLACES=127, PETRI_TRANSITIONS=185} [2024-06-14 12:11:15,619 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-14 12:11:15,619 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 185 transitions, 1960 flow [2024-06-14 12:11:15,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:15,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:15,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:11:15,620 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:15,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -666859985, now seen corresponding path program 1 times [2024-06-14 12:11:15,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:15,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513815798] [2024-06-14 12:11:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:16,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513815798] [2024-06-14 12:11:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513815798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:16,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:16,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:16,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244313953] [2024-06-14 12:11:16,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:16,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:16,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 185 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:16,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:16,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:16,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:17,419 INFO L124 PetriNetUnfolderBase]: 2124/3191 cut-off events. [2024-06-14 12:11:17,420 INFO L125 PetriNetUnfolderBase]: For 82121/82121 co-relation queries the response was YES. [2024-06-14 12:11:17,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22465 conditions, 3191 events. 2124/3191 cut-off events. For 82121/82121 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15366 event pairs, 488 based on Foata normal form. 3/3193 useless extension candidates. Maximal degree in co-relation 22404. Up to 3009 conditions per place. [2024-06-14 12:11:17,443 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 172 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2024-06-14 12:11:17,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2628 flow [2024-06-14 12:11:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:11:17,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 12:11:17,445 INFO L175 Difference]: Start difference. First operand has 127 places, 185 transitions, 1960 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:11:17,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2628 flow [2024-06-14 12:11:17,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 219 transitions, 2489 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:17,521 INFO L231 Difference]: Finished difference. Result has 132 places, 185 transitions, 1916 flow [2024-06-14 12:11:17,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1916, PETRI_PLACES=132, PETRI_TRANSITIONS=185} [2024-06-14 12:11:17,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-14 12:11:17,522 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 185 transitions, 1916 flow [2024-06-14 12:11:17,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:17,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:17,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:11:17,522 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 12:11:17,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash -551389325, now seen corresponding path program 2 times [2024-06-14 12:11:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:17,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765248195] [2024-06-14 12:11:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:18,627 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 12:11:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765248195] [2024-06-14 12:11:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765248195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:18,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:18,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496041254] [2024-06-14 12:11:18,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:18,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:18,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:18,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 185 transitions, 1916 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:18,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:18,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:19,498 INFO L124 PetriNetUnfolderBase]: 2192/3319 cut-off events. [2024-06-14 12:11:19,498 INFO L125 PetriNetUnfolderBase]: For 86793/86793 co-relation queries the response was YES. [2024-06-14 12:11:19,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23210 conditions, 3319 events. 2192/3319 cut-off events. For 86793/86793 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 16333 event pairs, 489 based on Foata normal form. 3/3321 useless extension candidates. Maximal degree in co-relation 23148. Up to 2839 conditions per place. [2024-06-14 12:11:19,525 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 144 selfloop transitions, 89 changer transitions 0/237 dead transitions. [2024-06-14 12:11:19,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 237 transitions, 2823 flow [2024-06-14 12:11:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:11:19,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-14 12:11:19,572 INFO L175 Difference]: Start difference. First operand has 132 places, 185 transitions, 1916 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:11:19,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 237 transitions, 2823 flow [2024-06-14 12:11:19,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 237 transitions, 2675 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:19,625 INFO L231 Difference]: Finished difference. Result has 135 places, 202 transitions, 2220 flow [2024-06-14 12:11:19,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2220, PETRI_PLACES=135, PETRI_TRANSITIONS=202} [2024-06-14 12:11:19,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-14 12:11:19,626 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 202 transitions, 2220 flow [2024-06-14 12:11:19,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:19,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:19,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:19,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:11:19,626 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 12:11:19,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash -551389077, now seen corresponding path program 1 times [2024-06-14 12:11:19,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:19,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129348231] [2024-06-14 12:11:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:20,449 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 12:11:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129348231] [2024-06-14 12:11:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129348231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:20,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:20,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:20,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172668539] [2024-06-14 12:11:20,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:20,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:20,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:20,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:20,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 202 transitions, 2220 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:20,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:20,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:21,253 INFO L124 PetriNetUnfolderBase]: 2220/3363 cut-off events. [2024-06-14 12:11:21,254 INFO L125 PetriNetUnfolderBase]: For 98355/98355 co-relation queries the response was YES. [2024-06-14 12:11:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24601 conditions, 3363 events. 2220/3363 cut-off events. For 98355/98355 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16622 event pairs, 490 based on Foata normal form. 6/3368 useless extension candidates. Maximal degree in co-relation 24537. Up to 3068 conditions per place. [2024-06-14 12:11:21,280 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 197 selfloop transitions, 63 changer transitions 0/264 dead transitions. [2024-06-14 12:11:21,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 264 transitions, 3386 flow [2024-06-14 12:11:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:11:21,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:11:21,282 INFO L175 Difference]: Start difference. First operand has 135 places, 202 transitions, 2220 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:11:21,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 264 transitions, 3386 flow [2024-06-14 12:11:21,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 264 transitions, 3114 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:21,338 INFO L231 Difference]: Finished difference. Result has 141 places, 233 transitions, 2654 flow [2024-06-14 12:11:21,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2654, PETRI_PLACES=141, PETRI_TRANSITIONS=233} [2024-06-14 12:11:21,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 12:11:21,339 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 233 transitions, 2654 flow [2024-06-14 12:11:21,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:21,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:21,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:11:21,339 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:21,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash 682913845, now seen corresponding path program 1 times [2024-06-14 12:11:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:21,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13553104] [2024-06-14 12:11:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:21,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:21,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13553104] [2024-06-14 12:11:21,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13553104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:21,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:21,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574751944] [2024-06-14 12:11:21,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:21,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:21,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 233 transitions, 2654 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:21,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:21,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:21,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:22,596 INFO L124 PetriNetUnfolderBase]: 2224/3371 cut-off events. [2024-06-14 12:11:22,596 INFO L125 PetriNetUnfolderBase]: For 103024/103024 co-relation queries the response was YES. [2024-06-14 12:11:22,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24974 conditions, 3371 events. 2224/3371 cut-off events. For 103024/103024 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16665 event pairs, 496 based on Foata normal form. 4/3374 useless extension candidates. Maximal degree in co-relation 24906. Up to 3203 conditions per place. [2024-06-14 12:11:22,624 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 221 selfloop transitions, 29 changer transitions 0/254 dead transitions. [2024-06-14 12:11:22,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 254 transitions, 3332 flow [2024-06-14 12:11:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 12:11:22,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:11:22,625 INFO L175 Difference]: Start difference. First operand has 141 places, 233 transitions, 2654 flow. Second operand 6 states and 112 transitions. [2024-06-14 12:11:22,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 254 transitions, 3332 flow [2024-06-14 12:11:22,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 254 transitions, 3209 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 12:11:22,709 INFO L231 Difference]: Finished difference. Result has 144 places, 238 transitions, 2672 flow [2024-06-14 12:11:22,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2672, PETRI_PLACES=144, PETRI_TRANSITIONS=238} [2024-06-14 12:11:22,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 12:11:22,710 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 238 transitions, 2672 flow [2024-06-14 12:11:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:22,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:22,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:22,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:11:22,710 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 12:11:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2005338933, now seen corresponding path program 4 times [2024-06-14 12:11:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130306991] [2024-06-14 12:11:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130306991] [2024-06-14 12:11:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130306991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:23,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906673763] [2024-06-14 12:11:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:23,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:23,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:23,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:23,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 238 transitions, 2672 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:23,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:23,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:23,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:24,424 INFO L124 PetriNetUnfolderBase]: 2132/3274 cut-off events. [2024-06-14 12:11:24,425 INFO L125 PetriNetUnfolderBase]: For 105766/105768 co-relation queries the response was YES. [2024-06-14 12:11:24,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24169 conditions, 3274 events. 2132/3274 cut-off events. For 105766/105768 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16489 event pairs, 458 based on Foata normal form. 6/3279 useless extension candidates. Maximal degree in co-relation 24099. Up to 2812 conditions per place. [2024-06-14 12:11:24,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-14 12:11:24,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 267 transitions, 3285 flow [2024-06-14 12:11:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:11:24,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-14 12:11:24,452 INFO L175 Difference]: Start difference. First operand has 144 places, 238 transitions, 2672 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:11:24,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 267 transitions, 3285 flow [2024-06-14 12:11:24,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 267 transitions, 3223 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:11:24,539 INFO L231 Difference]: Finished difference. Result has 150 places, 243 transitions, 2800 flow [2024-06-14 12:11:24,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2800, PETRI_PLACES=150, PETRI_TRANSITIONS=243} [2024-06-14 12:11:24,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 12:11:24,539 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 243 transitions, 2800 flow [2024-06-14 12:11:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:24,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:24,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:11:24,540 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 12:11:24,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1768682205, now seen corresponding path program 2 times [2024-06-14 12:11:24,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971110891] [2024-06-14 12:11:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:25,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:25,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971110891] [2024-06-14 12:11:25,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971110891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:25,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:25,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:25,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922019031] [2024-06-14 12:11:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:25,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:25,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 243 transitions, 2800 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:25,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:25,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:25,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:26,179 INFO L124 PetriNetUnfolderBase]: 2257/3420 cut-off events. [2024-06-14 12:11:26,180 INFO L125 PetriNetUnfolderBase]: For 118894/118896 co-relation queries the response was YES. [2024-06-14 12:11:26,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 3420 events. 2257/3420 cut-off events. For 118894/118896 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16966 event pairs, 427 based on Foata normal form. 8/3427 useless extension candidates. Maximal degree in co-relation 25824. Up to 2894 conditions per place. [2024-06-14 12:11:26,207 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 102 changer transitions 0/298 dead transitions. [2024-06-14 12:11:26,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 298 transitions, 4023 flow [2024-06-14 12:11:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:11:26,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 12:11:26,208 INFO L175 Difference]: Start difference. First operand has 150 places, 243 transitions, 2800 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:11:26,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 298 transitions, 4023 flow [2024-06-14 12:11:26,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 298 transitions, 3874 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:26,308 INFO L231 Difference]: Finished difference. Result has 157 places, 266 transitions, 3324 flow [2024-06-14 12:11:26,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3324, PETRI_PLACES=157, PETRI_TRANSITIONS=266} [2024-06-14 12:11:26,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-14 12:11:26,309 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 266 transitions, 3324 flow [2024-06-14 12:11:26,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:26,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:26,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:26,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:11:26,309 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:26,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1768979123, now seen corresponding path program 3 times [2024-06-14 12:11:26,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:26,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278611571] [2024-06-14 12:11:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:26,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:27,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278611571] [2024-06-14 12:11:27,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278611571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:27,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:27,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:27,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510505782] [2024-06-14 12:11:27,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:27,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:27,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:27,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:27,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:27,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:27,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 266 transitions, 3324 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:27,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:27,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:27,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:28,003 INFO L124 PetriNetUnfolderBase]: 2301/3496 cut-off events. [2024-06-14 12:11:28,003 INFO L125 PetriNetUnfolderBase]: For 126871/126871 co-relation queries the response was YES. [2024-06-14 12:11:28,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27440 conditions, 3496 events. 2301/3496 cut-off events. For 126871/126871 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17480 event pairs, 470 based on Foata normal form. 3/3498 useless extension candidates. Maximal degree in co-relation 27364. Up to 2661 conditions per place. [2024-06-14 12:11:28,032 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 118 selfloop transitions, 187 changer transitions 0/309 dead transitions. [2024-06-14 12:11:28,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 309 transitions, 4498 flow [2024-06-14 12:11:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:28,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:11:28,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:11:28,033 INFO L175 Difference]: Start difference. First operand has 157 places, 266 transitions, 3324 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:11:28,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 309 transitions, 4498 flow [2024-06-14 12:11:28,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 309 transitions, 4346 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-14 12:11:28,166 INFO L231 Difference]: Finished difference. Result has 165 places, 278 transitions, 3818 flow [2024-06-14 12:11:28,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3172, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3818, PETRI_PLACES=165, PETRI_TRANSITIONS=278} [2024-06-14 12:11:28,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-14 12:11:28,167 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 278 transitions, 3818 flow [2024-06-14 12:11:28,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:28,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:28,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:28,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:11:28,168 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 12:11:28,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2005154235, now seen corresponding path program 3 times [2024-06-14 12:11:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:28,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894800302] [2024-06-14 12:11:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:29,131 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 12:11:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894800302] [2024-06-14 12:11:29,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894800302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:29,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:29,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:29,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790583996] [2024-06-14 12:11:29,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:29,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:29,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:29,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:29,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 278 transitions, 3818 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:29,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:29,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:29,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:29,995 INFO L124 PetriNetUnfolderBase]: 2453/3743 cut-off events. [2024-06-14 12:11:29,995 INFO L125 PetriNetUnfolderBase]: For 154602/154602 co-relation queries the response was YES. [2024-06-14 12:11:30,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30032 conditions, 3743 events. 2453/3743 cut-off events. For 154602/154602 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19189 event pairs, 486 based on Foata normal form. 36/3778 useless extension candidates. Maximal degree in co-relation 29953. Up to 2926 conditions per place. [2024-06-14 12:11:30,026 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 200 selfloop transitions, 115 changer transitions 0/319 dead transitions. [2024-06-14 12:11:30,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 319 transitions, 4929 flow [2024-06-14 12:11:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 12:11:30,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-14 12:11:30,027 INFO L175 Difference]: Start difference. First operand has 165 places, 278 transitions, 3818 flow. Second operand 9 states and 178 transitions. [2024-06-14 12:11:30,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 319 transitions, 4929 flow [2024-06-14 12:11:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 319 transitions, 4627 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:30,182 INFO L231 Difference]: Finished difference. Result has 170 places, 283 transitions, 3927 flow [2024-06-14 12:11:30,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3927, PETRI_PLACES=170, PETRI_TRANSITIONS=283} [2024-06-14 12:11:30,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 12:11:30,182 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 283 transitions, 3927 flow [2024-06-14 12:11:30,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:30,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:30,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:30,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:11:30,183 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 12:11:30,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1890514837, now seen corresponding path program 4 times [2024-06-14 12:11:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:30,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942340653] [2024-06-14 12:11:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:31,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:31,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942340653] [2024-06-14 12:11:31,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942340653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:31,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:31,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084746066] [2024-06-14 12:11:31,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:31,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:31,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:31,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:31,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:31,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:31,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 283 transitions, 3927 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:31,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:31,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:31,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:32,074 INFO L124 PetriNetUnfolderBase]: 2567/3934 cut-off events. [2024-06-14 12:11:32,074 INFO L125 PetriNetUnfolderBase]: For 165204/165204 co-relation queries the response was YES. [2024-06-14 12:11:32,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31589 conditions, 3934 events. 2567/3934 cut-off events. For 165204/165204 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20597 event pairs, 500 based on Foata normal form. 36/3969 useless extension candidates. Maximal degree in co-relation 31508. Up to 2951 conditions per place. [2024-06-14 12:11:32,111 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 134 selfloop transitions, 186 changer transitions 0/324 dead transitions. [2024-06-14 12:11:32,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 324 transitions, 4922 flow [2024-06-14 12:11:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:11:32,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:11:32,112 INFO L175 Difference]: Start difference. First operand has 170 places, 283 transitions, 3927 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:11:32,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 324 transitions, 4922 flow [2024-06-14 12:11:32,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 324 transitions, 4551 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:32,309 INFO L231 Difference]: Finished difference. Result has 173 places, 285 transitions, 4024 flow [2024-06-14 12:11:32,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4024, PETRI_PLACES=173, PETRI_TRANSITIONS=285} [2024-06-14 12:11:32,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 12:11:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 285 transitions, 4024 flow [2024-06-14 12:11:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:11:32,310 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 12:11:32,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2005154483, now seen corresponding path program 4 times [2024-06-14 12:11:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981025963] [2024-06-14 12:11:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981025963] [2024-06-14 12:11:33,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981025963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:33,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:33,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:33,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158541442] [2024-06-14 12:11:33,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:33,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:33,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:33,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:33,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:33,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 285 transitions, 4024 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:34,144 INFO L124 PetriNetUnfolderBase]: 2585/3968 cut-off events. [2024-06-14 12:11:34,145 INFO L125 PetriNetUnfolderBase]: For 150577/150577 co-relation queries the response was YES. [2024-06-14 12:11:34,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31882 conditions, 3968 events. 2585/3968 cut-off events. For 150577/150577 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20899 event pairs, 500 based on Foata normal form. 3/3970 useless extension candidates. Maximal degree in co-relation 31800. Up to 3333 conditions per place. [2024-06-14 12:11:34,182 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 202 selfloop transitions, 114 changer transitions 0/320 dead transitions. [2024-06-14 12:11:34,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 320 transitions, 5051 flow [2024-06-14 12:11:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:11:34,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:11:34,183 INFO L175 Difference]: Start difference. First operand has 173 places, 285 transitions, 4024 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:11:34,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 320 transitions, 5051 flow [2024-06-14 12:11:34,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 320 transitions, 4637 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:34,388 INFO L231 Difference]: Finished difference. Result has 174 places, 289 transitions, 3961 flow [2024-06-14 12:11:34,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3961, PETRI_PLACES=174, PETRI_TRANSITIONS=289} [2024-06-14 12:11:34,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 12:11:34,389 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 289 transitions, 3961 flow [2024-06-14 12:11:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:34,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:34,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:34,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:11:34,389 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 12:11:34,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:34,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1777253333, now seen corresponding path program 5 times [2024-06-14 12:11:34,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:34,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641409460] [2024-06-14 12:11:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:34,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:35,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641409460] [2024-06-14 12:11:35,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641409460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:35,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:35,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:35,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98721812] [2024-06-14 12:11:35,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:35,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:35,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:35,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:35,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 289 transitions, 3961 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:35,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:35,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:35,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:36,315 INFO L124 PetriNetUnfolderBase]: 2579/3960 cut-off events. [2024-06-14 12:11:36,316 INFO L125 PetriNetUnfolderBase]: For 149921/149921 co-relation queries the response was YES. [2024-06-14 12:11:36,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31206 conditions, 3960 events. 2579/3960 cut-off events. For 149921/149921 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20812 event pairs, 500 based on Foata normal form. 3/3962 useless extension candidates. Maximal degree in co-relation 31123. Up to 3325 conditions per place. [2024-06-14 12:11:36,350 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 174 selfloop transitions, 141 changer transitions 0/319 dead transitions. [2024-06-14 12:11:36,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 319 transitions, 4818 flow [2024-06-14 12:11:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:11:36,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-14 12:11:36,352 INFO L175 Difference]: Start difference. First operand has 174 places, 289 transitions, 3961 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:11:36,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 319 transitions, 4818 flow [2024-06-14 12:11:36,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 319 transitions, 4457 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:36,521 INFO L231 Difference]: Finished difference. Result has 176 places, 289 transitions, 3891 flow [2024-06-14 12:11:36,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3891, PETRI_PLACES=176, PETRI_TRANSITIONS=289} [2024-06-14 12:11:36,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 12:11:36,522 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 289 transitions, 3891 flow [2024-06-14 12:11:36,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:36,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:36,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:36,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:11:36,522 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:36,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:36,522 INFO L85 PathProgramCache]: Analyzing trace with hash 181942355, now seen corresponding path program 2 times [2024-06-14 12:11:36,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:36,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488678421] [2024-06-14 12:11:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488678421] [2024-06-14 12:11:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488678421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:37,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450089420] [2024-06-14 12:11:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:37,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:37,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 289 transitions, 3891 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:37,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:37,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:37,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:37,907 INFO L124 PetriNetUnfolderBase]: 2573/3952 cut-off events. [2024-06-14 12:11:37,907 INFO L125 PetriNetUnfolderBase]: For 153809/153809 co-relation queries the response was YES. [2024-06-14 12:11:37,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31137 conditions, 3952 events. 2573/3952 cut-off events. For 153809/153809 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20728 event pairs, 522 based on Foata normal form. 2/3953 useless extension candidates. Maximal degree in co-relation 31053. Up to 3768 conditions per place. [2024-06-14 12:11:37,940 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 267 selfloop transitions, 28 changer transitions 0/299 dead transitions. [2024-06-14 12:11:37,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 299 transitions, 4520 flow [2024-06-14 12:11:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:11:37,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:11:37,941 INFO L175 Difference]: Start difference. First operand has 176 places, 289 transitions, 3891 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:11:37,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 299 transitions, 4520 flow [2024-06-14 12:11:38,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 299 transitions, 3975 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-14 12:11:38,093 INFO L231 Difference]: Finished difference. Result has 172 places, 289 transitions, 3410 flow [2024-06-14 12:11:38,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3410, PETRI_PLACES=172, PETRI_TRANSITIONS=289} [2024-06-14 12:11:38,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-14 12:11:38,094 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 289 transitions, 3410 flow [2024-06-14 12:11:38,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:38,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:38,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:38,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:11:38,094 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:38,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1797815291, now seen corresponding path program 1 times [2024-06-14 12:11:38,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:38,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742883021] [2024-06-14 12:11:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:38,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742883021] [2024-06-14 12:11:38,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742883021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:38,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:38,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41740286] [2024-06-14 12:11:38,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:38,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:38,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:38,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:38,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 289 transitions, 3410 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:39,335 INFO L124 PetriNetUnfolderBase]: 2371/3738 cut-off events. [2024-06-14 12:11:39,335 INFO L125 PetriNetUnfolderBase]: For 134842/134842 co-relation queries the response was YES. [2024-06-14 12:11:39,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27643 conditions, 3738 events. 2371/3738 cut-off events. For 134842/134842 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20120 event pairs, 498 based on Foata normal form. 2/3739 useless extension candidates. Maximal degree in co-relation 27560. Up to 3514 conditions per place. [2024-06-14 12:11:39,371 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 279 selfloop transitions, 20 changer transitions 0/304 dead transitions. [2024-06-14 12:11:39,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 304 transitions, 4147 flow [2024-06-14 12:11:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:11:39,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:11:39,372 INFO L175 Difference]: Start difference. First operand has 172 places, 289 transitions, 3410 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:11:39,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 304 transitions, 4147 flow [2024-06-14 12:11:39,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 304 transitions, 4076 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:39,528 INFO L231 Difference]: Finished difference. Result has 173 places, 292 transitions, 3424 flow [2024-06-14 12:11:39,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3424, PETRI_PLACES=173, PETRI_TRANSITIONS=292} [2024-06-14 12:11:39,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 12:11:39,528 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 292 transitions, 3424 flow [2024-06-14 12:11:39,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:39,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:39,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:11:39,529 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash 182294267, now seen corresponding path program 2 times [2024-06-14 12:11:39,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:39,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046502164] [2024-06-14 12:11:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:40,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046502164] [2024-06-14 12:11:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046502164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:40,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:40,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:40,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796694747] [2024-06-14 12:11:40,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:40,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:40,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:40,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:40,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:11:40,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 292 transitions, 3424 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:40,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:40,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:11:40,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:40,828 INFO L124 PetriNetUnfolderBase]: 2328/3666 cut-off events. [2024-06-14 12:11:40,828 INFO L125 PetriNetUnfolderBase]: For 138172/138172 co-relation queries the response was YES. [2024-06-14 12:11:40,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27335 conditions, 3666 events. 2328/3666 cut-off events. For 138172/138172 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19615 event pairs, 494 based on Foata normal form. 1/3666 useless extension candidates. Maximal degree in co-relation 27251. Up to 3476 conditions per place. [2024-06-14 12:11:40,861 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 12 changer transitions 0/300 dead transitions. [2024-06-14 12:11:40,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 300 transitions, 4036 flow [2024-06-14 12:11:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:11:40,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:11:40,864 INFO L175 Difference]: Start difference. First operand has 173 places, 292 transitions, 3424 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:11:40,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 300 transitions, 4036 flow [2024-06-14 12:11:41,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 300 transitions, 4005 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:11:41,023 INFO L231 Difference]: Finished difference. Result has 176 places, 292 transitions, 3423 flow [2024-06-14 12:11:41,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3423, PETRI_PLACES=176, PETRI_TRANSITIONS=292} [2024-06-14 12:11:41,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 12:11:41,024 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 292 transitions, 3423 flow [2024-06-14 12:11:41,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:41,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:41,024 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 12:11:41,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:11:41,024 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 12:11:41,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:41,025 INFO L85 PathProgramCache]: Analyzing trace with hash 713458181, now seen corresponding path program 1 times [2024-06-14 12:11:41,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:41,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595429578] [2024-06-14 12:11:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:41,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:41,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595429578] [2024-06-14 12:11:41,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595429578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:41,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:41,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211209311] [2024-06-14 12:11:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:41,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:41,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:41,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:41,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 292 transitions, 3423 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:41,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:41,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:41,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:42,739 INFO L124 PetriNetUnfolderBase]: 2586/3960 cut-off events. [2024-06-14 12:11:42,739 INFO L125 PetriNetUnfolderBase]: For 173243/173243 co-relation queries the response was YES. [2024-06-14 12:11:42,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30651 conditions, 3960 events. 2586/3960 cut-off events. For 173243/173243 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20696 event pairs, 338 based on Foata normal form. 6/3965 useless extension candidates. Maximal degree in co-relation 30566. Up to 3654 conditions per place. [2024-06-14 12:11:42,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 288 selfloop transitions, 44 changer transitions 0/336 dead transitions. [2024-06-14 12:11:42,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 336 transitions, 4535 flow [2024-06-14 12:11:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:11:42,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:11:42,780 INFO L175 Difference]: Start difference. First operand has 176 places, 292 transitions, 3423 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:11:42,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 336 transitions, 4535 flow [2024-06-14 12:11:42,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 336 transitions, 4486 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:42,955 INFO L231 Difference]: Finished difference. Result has 181 places, 300 transitions, 3690 flow [2024-06-14 12:11:42,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3690, PETRI_PLACES=181, PETRI_TRANSITIONS=300} [2024-06-14 12:11:42,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 12:11:42,956 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 300 transitions, 3690 flow [2024-06-14 12:11:42,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:42,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:42,956 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 12:11:42,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:11:42,956 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 12:11:42,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash 802023941, now seen corresponding path program 2 times [2024-06-14 12:11:42,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:42,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614298074] [2024-06-14 12:11:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:43,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:43,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614298074] [2024-06-14 12:11:43,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614298074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:43,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:43,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:43,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089687568] [2024-06-14 12:11:43,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:43,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:43,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:43,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:43,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 300 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:43,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:43,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:43,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:44,778 INFO L124 PetriNetUnfolderBase]: 2665/4081 cut-off events. [2024-06-14 12:11:44,778 INFO L125 PetriNetUnfolderBase]: For 192415/192415 co-relation queries the response was YES. [2024-06-14 12:11:44,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32726 conditions, 4081 events. 2665/4081 cut-off events. For 192415/192415 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21521 event pairs, 484 based on Foata normal form. 6/4086 useless extension candidates. Maximal degree in co-relation 32638. Up to 3758 conditions per place. [2024-06-14 12:11:44,820 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 48 changer transitions 0/343 dead transitions. [2024-06-14 12:11:44,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 343 transitions, 4908 flow [2024-06-14 12:11:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:11:44,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-14 12:11:44,821 INFO L175 Difference]: Start difference. First operand has 181 places, 300 transitions, 3690 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:11:44,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 343 transitions, 4908 flow [2024-06-14 12:11:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 343 transitions, 4739 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:45,054 INFO L231 Difference]: Finished difference. Result has 187 places, 306 transitions, 3806 flow [2024-06-14 12:11:45,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3806, PETRI_PLACES=187, PETRI_TRANSITIONS=306} [2024-06-14 12:11:45,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 12:11:45,055 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 306 transitions, 3806 flow [2024-06-14 12:11:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:45,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:45,055 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 12:11:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:11:45,055 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 12:11:45,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash -481547903, now seen corresponding path program 3 times [2024-06-14 12:11:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368118958] [2024-06-14 12:11:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368118958] [2024-06-14 12:11:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368118958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:46,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:46,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883928027] [2024-06-14 12:11:46,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:46,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:46,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:46,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:46,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 306 transitions, 3806 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:46,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:46,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:46,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:46,989 INFO L124 PetriNetUnfolderBase]: 2668/4086 cut-off events. [2024-06-14 12:11:46,989 INFO L125 PetriNetUnfolderBase]: For 201448/201448 co-relation queries the response was YES. [2024-06-14 12:11:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33034 conditions, 4086 events. 2668/4086 cut-off events. For 201448/201448 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21552 event pairs, 488 based on Foata normal form. 6/4091 useless extension candidates. Maximal degree in co-relation 32943. Up to 3850 conditions per place. [2024-06-14 12:11:47,034 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 47 changer transitions 0/342 dead transitions. [2024-06-14 12:11:47,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 342 transitions, 4762 flow [2024-06-14 12:11:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:11:47,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-14 12:11:47,035 INFO L175 Difference]: Start difference. First operand has 187 places, 306 transitions, 3806 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:11:47,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 342 transitions, 4762 flow [2024-06-14 12:11:47,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 342 transitions, 4575 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:47,269 INFO L231 Difference]: Finished difference. Result has 191 places, 309 transitions, 3831 flow [2024-06-14 12:11:47,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3635, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3831, PETRI_PLACES=191, PETRI_TRANSITIONS=309} [2024-06-14 12:11:47,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 12:11:47,270 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 309 transitions, 3831 flow [2024-06-14 12:11:47,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:47,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:47,271 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 12:11:47,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:11:47,271 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 12:11:47,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash -291452173, now seen corresponding path program 4 times [2024-06-14 12:11:47,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:47,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530880207] [2024-06-14 12:11:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:47,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:48,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530880207] [2024-06-14 12:11:48,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530880207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:48,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:48,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:48,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909189717] [2024-06-14 12:11:48,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:48,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:48,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:48,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:48,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:48,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 309 transitions, 3831 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:48,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:48,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:48,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:49,148 INFO L124 PetriNetUnfolderBase]: 2696/4130 cut-off events. [2024-06-14 12:11:49,148 INFO L125 PetriNetUnfolderBase]: For 211382/211382 co-relation queries the response was YES. [2024-06-14 12:11:49,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33387 conditions, 4130 events. 2696/4130 cut-off events. For 211382/211382 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21856 event pairs, 491 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 33294. Up to 3719 conditions per place. [2024-06-14 12:11:49,189 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 256 selfloop transitions, 83 changer transitions 0/343 dead transitions. [2024-06-14 12:11:49,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 343 transitions, 4863 flow [2024-06-14 12:11:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:11:49,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:11:49,190 INFO L175 Difference]: Start difference. First operand has 191 places, 309 transitions, 3831 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:11:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 343 transitions, 4863 flow [2024-06-14 12:11:49,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 343 transitions, 4697 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:49,417 INFO L231 Difference]: Finished difference. Result has 193 places, 312 transitions, 3951 flow [2024-06-14 12:11:49,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3951, PETRI_PLACES=193, PETRI_TRANSITIONS=312} [2024-06-14 12:11:49,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 12:11:49,418 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 312 transitions, 3951 flow [2024-06-14 12:11:49,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:49,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:49,418 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 12:11:49,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:11:49,418 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 12:11:49,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash -291455893, now seen corresponding path program 5 times [2024-06-14 12:11:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:49,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648359795] [2024-06-14 12:11:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:49,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:50,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:50,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648359795] [2024-06-14 12:11:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648359795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:50,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520281860] [2024-06-14 12:11:50,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:50,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:50,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:50,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 312 transitions, 3951 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:50,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:50,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:50,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:51,317 INFO L124 PetriNetUnfolderBase]: 2775/4251 cut-off events. [2024-06-14 12:11:51,317 INFO L125 PetriNetUnfolderBase]: For 229546/229546 co-relation queries the response was YES. [2024-06-14 12:11:51,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35363 conditions, 4251 events. 2775/4251 cut-off events. For 229546/229546 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22627 event pairs, 501 based on Foata normal form. 6/4256 useless extension candidates. Maximal degree in co-relation 35269. Up to 3689 conditions per place. [2024-06-14 12:11:51,365 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 80 changer transitions 0/353 dead transitions. [2024-06-14 12:11:51,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 353 transitions, 5311 flow [2024-06-14 12:11:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:11:51,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-14 12:11:51,366 INFO L175 Difference]: Start difference. First operand has 193 places, 312 transitions, 3951 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:11:51,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 353 transitions, 5311 flow [2024-06-14 12:11:51,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 353 transitions, 4990 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:51,593 INFO L231 Difference]: Finished difference. Result has 195 places, 318 transitions, 4014 flow [2024-06-14 12:11:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4014, PETRI_PLACES=195, PETRI_TRANSITIONS=318} [2024-06-14 12:11:51,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-14 12:11:51,594 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 318 transitions, 4014 flow [2024-06-14 12:11:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:51,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:51,594 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 12:11:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:11:51,595 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 12:11:51,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 538452407, now seen corresponding path program 6 times [2024-06-14 12:11:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:51,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619188508] [2024-06-14 12:11:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:52,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:52,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619188508] [2024-06-14 12:11:52,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619188508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:52,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:52,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802250049] [2024-06-14 12:11:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:52,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:52,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:52,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 318 transitions, 4014 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:52,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:52,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:53,475 INFO L124 PetriNetUnfolderBase]: 2778/4256 cut-off events. [2024-06-14 12:11:53,475 INFO L125 PetriNetUnfolderBase]: For 239825/239825 co-relation queries the response was YES. [2024-06-14 12:11:53,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35475 conditions, 4256 events. 2778/4256 cut-off events. For 239825/239825 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22685 event pairs, 507 based on Foata normal form. 6/4261 useless extension candidates. Maximal degree in co-relation 35381. Up to 3845 conditions per place. [2024-06-14 12:11:53,522 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 254 selfloop transitions, 93 changer transitions 0/351 dead transitions. [2024-06-14 12:11:53,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 351 transitions, 4998 flow [2024-06-14 12:11:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:11:53,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:11:53,523 INFO L175 Difference]: Start difference. First operand has 195 places, 318 transitions, 4014 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:11:53,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 351 transitions, 4998 flow [2024-06-14 12:11:53,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 351 transitions, 4757 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:53,757 INFO L231 Difference]: Finished difference. Result has 199 places, 321 transitions, 4093 flow [2024-06-14 12:11:53,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4093, PETRI_PLACES=199, PETRI_TRANSITIONS=321} [2024-06-14 12:11:53,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 12:11:53,758 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 321 transitions, 4093 flow [2024-06-14 12:11:53,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:53,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:53,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:53,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:11:53,759 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 12:11:53,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -481541951, now seen corresponding path program 1 times [2024-06-14 12:11:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:53,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373205836] [2024-06-14 12:11:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:53,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:54,999 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 12:11:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373205836] [2024-06-14 12:11:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373205836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116066496] [2024-06-14 12:11:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:55,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:55,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 321 transitions, 4093 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:55,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:55,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:55,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:56,063 INFO L124 PetriNetUnfolderBase]: 2874/4416 cut-off events. [2024-06-14 12:11:56,063 INFO L125 PetriNetUnfolderBase]: For 271470/271470 co-relation queries the response was YES. [2024-06-14 12:11:56,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37046 conditions, 4416 events. 2874/4416 cut-off events. For 271470/271470 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23880 event pairs, 527 based on Foata normal form. 24/4439 useless extension candidates. Maximal degree in co-relation 36950. Up to 4015 conditions per place. [2024-06-14 12:11:56,112 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 307 selfloop transitions, 52 changer transitions 0/363 dead transitions. [2024-06-14 12:11:56,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 363 transitions, 5145 flow [2024-06-14 12:11:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:11:56,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:11:56,113 INFO L175 Difference]: Start difference. First operand has 199 places, 321 transitions, 4093 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:11:56,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 363 transitions, 5145 flow [2024-06-14 12:11:56,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 363 transitions, 4879 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:56,351 INFO L231 Difference]: Finished difference. Result has 202 places, 323 transitions, 4048 flow [2024-06-14 12:11:56,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3827, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4048, PETRI_PLACES=202, PETRI_TRANSITIONS=323} [2024-06-14 12:11:56,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-14 12:11:56,352 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 323 transitions, 4048 flow [2024-06-14 12:11:56,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:56,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:56,352 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 12:11:56,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:11:56,352 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 12:11:56,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash 533095979, now seen corresponding path program 2 times [2024-06-14 12:11:56,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:56,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894685838] [2024-06-14 12:11:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:57,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894685838] [2024-06-14 12:11:57,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894685838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:57,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:57,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89993889] [2024-06-14 12:11:57,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:57,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:57,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:57,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 323 transitions, 4048 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:58,656 INFO L124 PetriNetUnfolderBase]: 3020/4648 cut-off events. [2024-06-14 12:11:58,657 INFO L125 PetriNetUnfolderBase]: For 291071/291071 co-relation queries the response was YES. [2024-06-14 12:11:58,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39000 conditions, 4648 events. 3020/4648 cut-off events. For 291071/291071 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25491 event pairs, 543 based on Foata normal form. 24/4671 useless extension candidates. Maximal degree in co-relation 38903. Up to 4022 conditions per place. [2024-06-14 12:11:58,708 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 275 selfloop transitions, 96 changer transitions 0/375 dead transitions. [2024-06-14 12:11:58,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 375 transitions, 5324 flow [2024-06-14 12:11:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:11:58,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:11:58,712 INFO L175 Difference]: Start difference. First operand has 202 places, 323 transitions, 4048 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:11:58,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 375 transitions, 5324 flow [2024-06-14 12:11:58,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 375 transitions, 5161 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:58,991 INFO L231 Difference]: Finished difference. Result has 205 places, 337 transitions, 4357 flow [2024-06-14 12:11:58,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4357, PETRI_PLACES=205, PETRI_TRANSITIONS=337} [2024-06-14 12:11:58,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 12:11:58,991 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 337 transitions, 4357 flow [2024-06-14 12:11:58,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:58,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:58,992 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 12:11:58,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:11:58,992 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 12:11:58,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 538660169, now seen corresponding path program 3 times [2024-06-14 12:11:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:58,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327224607] [2024-06-14 12:11:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327224607] [2024-06-14 12:12:00,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327224607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:00,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:00,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076348825] [2024-06-14 12:12:00,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:00,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:00,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:00,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:00,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 337 transitions, 4357 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:00,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:00,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:00,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:01,424 INFO L124 PetriNetUnfolderBase]: 3116/4818 cut-off events. [2024-06-14 12:12:01,424 INFO L125 PetriNetUnfolderBase]: For 307097/307097 co-relation queries the response was YES. [2024-06-14 12:12:01,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40768 conditions, 4818 events. 3116/4818 cut-off events. For 307097/307097 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26773 event pairs, 564 based on Foata normal form. 24/4841 useless extension candidates. Maximal degree in co-relation 40669. Up to 4129 conditions per place. [2024-06-14 12:12:01,475 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 241 selfloop transitions, 135 changer transitions 0/380 dead transitions. [2024-06-14 12:12:01,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 380 transitions, 5457 flow [2024-06-14 12:12:01,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-14 12:12:01,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 12:12:01,477 INFO L175 Difference]: Start difference. First operand has 205 places, 337 transitions, 4357 flow. Second operand 11 states and 207 transitions. [2024-06-14 12:12:01,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 380 transitions, 5457 flow [2024-06-14 12:12:01,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 380 transitions, 5211 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:01,817 INFO L231 Difference]: Finished difference. Result has 209 places, 339 transitions, 4509 flow [2024-06-14 12:12:01,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4509, PETRI_PLACES=209, PETRI_TRANSITIONS=339} [2024-06-14 12:12:01,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-14 12:12:01,818 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 339 transitions, 4509 flow [2024-06-14 12:12:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:01,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:01,818 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 12:12:01,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:12:01,818 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 12:12:01,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash 538667609, now seen corresponding path program 4 times [2024-06-14 12:12:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:01,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336431763] [2024-06-14 12:12:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:01,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336431763] [2024-06-14 12:12:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336431763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:02,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918513391] [2024-06-14 12:12:02,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:02,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:02,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 339 transitions, 4509 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:02,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:02,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:02,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:04,064 INFO L124 PetriNetUnfolderBase]: 3452/5394 cut-off events. [2024-06-14 12:12:04,064 INFO L125 PetriNetUnfolderBase]: For 352960/352960 co-relation queries the response was YES. [2024-06-14 12:12:04,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46361 conditions, 5394 events. 3452/5394 cut-off events. For 352960/352960 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30995 event pairs, 632 based on Foata normal form. 18/5411 useless extension candidates. Maximal degree in co-relation 46261. Up to 3996 conditions per place. [2024-06-14 12:12:04,123 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 232 selfloop transitions, 154 changer transitions 0/390 dead transitions. [2024-06-14 12:12:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 390 transitions, 6033 flow [2024-06-14 12:12:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 12:12:04,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-14 12:12:04,124 INFO L175 Difference]: Start difference. First operand has 209 places, 339 transitions, 4509 flow. Second operand 10 states and 194 transitions. [2024-06-14 12:12:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 390 transitions, 6033 flow [2024-06-14 12:12:04,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 390 transitions, 5703 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:04,510 INFO L231 Difference]: Finished difference. Result has 211 places, 347 transitions, 4854 flow [2024-06-14 12:12:04,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4854, PETRI_PLACES=211, PETRI_TRANSITIONS=347} [2024-06-14 12:12:04,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-14 12:12:04,511 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 347 transitions, 4854 flow [2024-06-14 12:12:04,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:04,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:04,511 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 12:12:04,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:12:04,512 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 12:12:04,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 86599117, now seen corresponding path program 5 times [2024-06-14 12:12:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:04,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132978149] [2024-06-14 12:12:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:04,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:05,565 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 12:12:05,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:05,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132978149] [2024-06-14 12:12:05,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132978149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:05,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:05,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:05,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37526714] [2024-06-14 12:12:05,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:05,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:05,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:05,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:05,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:05,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:05,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 347 transitions, 4854 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:05,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:05,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:05,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:06,820 INFO L124 PetriNetUnfolderBase]: 3416/5342 cut-off events. [2024-06-14 12:12:06,820 INFO L125 PetriNetUnfolderBase]: For 337722/337722 co-relation queries the response was YES. [2024-06-14 12:12:06,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45010 conditions, 5342 events. 3416/5342 cut-off events. For 337722/337722 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30683 event pairs, 646 based on Foata normal form. 24/5365 useless extension candidates. Maximal degree in co-relation 44908. Up to 4746 conditions per place. [2024-06-14 12:12:06,882 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 276 selfloop transitions, 104 changer transitions 0/384 dead transitions. [2024-06-14 12:12:06,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 384 transitions, 5844 flow [2024-06-14 12:12:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 12:12:06,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-14 12:12:06,883 INFO L175 Difference]: Start difference. First operand has 211 places, 347 transitions, 4854 flow. Second operand 10 states and 188 transitions. [2024-06-14 12:12:06,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 384 transitions, 5844 flow [2024-06-14 12:12:07,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 384 transitions, 5501 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:07,344 INFO L231 Difference]: Finished difference. Result has 215 places, 347 transitions, 4731 flow [2024-06-14 12:12:07,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4731, PETRI_PLACES=215, PETRI_TRANSITIONS=347} [2024-06-14 12:12:07,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 12:12:07,345 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 347 transitions, 4731 flow [2024-06-14 12:12:07,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:07,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:07,345 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 12:12:07,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:12:07,345 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:07,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:07,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2110262021, now seen corresponding path program 1 times [2024-06-14 12:12:07,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:07,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290059713] [2024-06-14 12:12:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290059713] [2024-06-14 12:12:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290059713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:07,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:07,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:07,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910474536] [2024-06-14 12:12:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:07,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:08,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:08,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 347 transitions, 4731 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:08,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:08,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:08,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:09,120 INFO L124 PetriNetUnfolderBase]: 3426/5358 cut-off events. [2024-06-14 12:12:09,120 INFO L125 PetriNetUnfolderBase]: For 306406/306406 co-relation queries the response was YES. [2024-06-14 12:12:09,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44412 conditions, 5358 events. 3426/5358 cut-off events. For 306406/306406 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30805 event pairs, 646 based on Foata normal form. 2/5359 useless extension candidates. Maximal degree in co-relation 44308. Up to 5126 conditions per place. [2024-06-14 12:12:09,179 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 35 changer transitions 0/375 dead transitions. [2024-06-14 12:12:09,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 375 transitions, 5761 flow [2024-06-14 12:12:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:12:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:12:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:12:09,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-14 12:12:09,180 INFO L175 Difference]: Start difference. First operand has 215 places, 347 transitions, 4731 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:12:09,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 375 transitions, 5761 flow [2024-06-14 12:12:09,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 375 transitions, 5482 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:09,557 INFO L231 Difference]: Finished difference. Result has 214 places, 356 transitions, 4646 flow [2024-06-14 12:12:09,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4454, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4646, PETRI_PLACES=214, PETRI_TRANSITIONS=356} [2024-06-14 12:12:09,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-14 12:12:09,557 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 356 transitions, 4646 flow [2024-06-14 12:12:09,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:09,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:09,558 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 12:12:09,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:12:09,558 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 12:12:09,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2035964023, now seen corresponding path program 7 times [2024-06-14 12:12:09,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:09,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850742833] [2024-06-14 12:12:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:10,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:10,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850742833] [2024-06-14 12:12:10,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850742833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:10,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:10,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:10,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820714763] [2024-06-14 12:12:10,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:10,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:10,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:10,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:10,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:10,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 356 transitions, 4646 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:10,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:10,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:10,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:11,671 INFO L124 PetriNetUnfolderBase]: 3429/5361 cut-off events. [2024-06-14 12:12:11,671 INFO L125 PetriNetUnfolderBase]: For 316323/316323 co-relation queries the response was YES. [2024-06-14 12:12:11,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44196 conditions, 5361 events. 3429/5361 cut-off events. For 316323/316323 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30774 event pairs, 650 based on Foata normal form. 6/5366 useless extension candidates. Maximal degree in co-relation 44092. Up to 4616 conditions per place. [2024-06-14 12:12:11,732 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 285 selfloop transitions, 110 changer transitions 0/399 dead transitions. [2024-06-14 12:12:11,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 399 transitions, 6240 flow [2024-06-14 12:12:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:12:11,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:12:11,733 INFO L175 Difference]: Start difference. First operand has 214 places, 356 transitions, 4646 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:12:11,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 399 transitions, 6240 flow [2024-06-14 12:12:12,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 399 transitions, 6182 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:12:12,086 INFO L231 Difference]: Finished difference. Result has 221 places, 364 transitions, 5110 flow [2024-06-14 12:12:12,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5110, PETRI_PLACES=221, PETRI_TRANSITIONS=364} [2024-06-14 12:12:12,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 12:12:12,087 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 364 transitions, 5110 flow [2024-06-14 12:12:12,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:12,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:12,087 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 12:12:12,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:12:12,088 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 12:12:12,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2030238571, now seen corresponding path program 6 times [2024-06-14 12:12:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22474727] [2024-06-14 12:12:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:12,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:13,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:13,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22474727] [2024-06-14 12:12:13,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22474727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:13,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:13,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:13,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174176503] [2024-06-14 12:12:13,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:13,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:13,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 364 transitions, 5110 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:13,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:13,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:13,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:14,671 INFO L124 PetriNetUnfolderBase]: 3629/5697 cut-off events. [2024-06-14 12:12:14,671 INFO L125 PetriNetUnfolderBase]: For 398618/398618 co-relation queries the response was YES. [2024-06-14 12:12:14,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49740 conditions, 5697 events. 3629/5697 cut-off events. For 398618/398618 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33349 event pairs, 684 based on Foata normal form. 18/5714 useless extension candidates. Maximal degree in co-relation 49633. Up to 4557 conditions per place. [2024-06-14 12:12:14,728 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 283 selfloop transitions, 125 changer transitions 0/412 dead transitions. [2024-06-14 12:12:14,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 412 transitions, 6756 flow [2024-06-14 12:12:14,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 12:12:14,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-14 12:12:14,729 INFO L175 Difference]: Start difference. First operand has 221 places, 364 transitions, 5110 flow. Second operand 10 states and 197 transitions. [2024-06-14 12:12:14,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 412 transitions, 6756 flow [2024-06-14 12:12:15,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 412 transitions, 6418 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:15,262 INFO L231 Difference]: Finished difference. Result has 227 places, 368 transitions, 5293 flow [2024-06-14 12:12:15,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5293, PETRI_PLACES=227, PETRI_TRANSITIONS=368} [2024-06-14 12:12:15,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-14 12:12:15,262 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 368 transitions, 5293 flow [2024-06-14 12:12:15,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:15,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:15,262 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 12:12:15,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:12:15,262 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 12:12:15,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2030246011, now seen corresponding path program 7 times [2024-06-14 12:12:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:15,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569567841] [2024-06-14 12:12:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:16,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569567841] [2024-06-14 12:12:16,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569567841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:16,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:16,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652180345] [2024-06-14 12:12:16,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:16,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:16,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:16,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:16,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 368 transitions, 5293 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:16,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:16,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:16,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:17,954 INFO L124 PetriNetUnfolderBase]: 3639/5733 cut-off events. [2024-06-14 12:12:17,954 INFO L125 PetriNetUnfolderBase]: For 389062/389062 co-relation queries the response was YES. [2024-06-14 12:12:17,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48530 conditions, 5733 events. 3639/5733 cut-off events. For 389062/389062 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33794 event pairs, 707 based on Foata normal form. 24/5756 useless extension candidates. Maximal degree in co-relation 48422. Up to 4884 conditions per place. [2024-06-14 12:12:18,017 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 287 selfloop transitions, 126 changer transitions 0/417 dead transitions. [2024-06-14 12:12:18,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 417 transitions, 6584 flow [2024-06-14 12:12:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 12:12:18,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:12:18,018 INFO L175 Difference]: Start difference. First operand has 227 places, 368 transitions, 5293 flow. Second operand 11 states and 210 transitions. [2024-06-14 12:12:18,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 417 transitions, 6584 flow [2024-06-14 12:12:18,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 417 transitions, 6272 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:18,595 INFO L231 Difference]: Finished difference. Result has 233 places, 376 transitions, 5376 flow [2024-06-14 12:12:18,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5376, PETRI_PLACES=233, PETRI_TRANSITIONS=376} [2024-06-14 12:12:18,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 12:12:18,596 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 376 transitions, 5376 flow [2024-06-14 12:12:18,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:18,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:18,596 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 12:12:18,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:12:18,596 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 12:12:18,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1005427063, now seen corresponding path program 8 times [2024-06-14 12:12:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:18,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145780346] [2024-06-14 12:12:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:19,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:19,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145780346] [2024-06-14 12:12:19,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145780346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:19,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:19,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:19,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968918179] [2024-06-14 12:12:19,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:19,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:19,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 376 transitions, 5376 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:19,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:19,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:19,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:21,161 INFO L124 PetriNetUnfolderBase]: 3936/6232 cut-off events. [2024-06-14 12:12:21,161 INFO L125 PetriNetUnfolderBase]: For 420069/420069 co-relation queries the response was YES. [2024-06-14 12:12:21,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53212 conditions, 6232 events. 3936/6232 cut-off events. For 420069/420069 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37433 event pairs, 714 based on Foata normal form. 18/6249 useless extension candidates. Maximal degree in co-relation 53101. Up to 3673 conditions per place. [2024-06-14 12:12:21,222 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 241 changer transitions 0/426 dead transitions. [2024-06-14 12:12:21,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 426 transitions, 7038 flow [2024-06-14 12:12:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:12:21,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:12:21,223 INFO L175 Difference]: Start difference. First operand has 233 places, 376 transitions, 5376 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:12:21,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 426 transitions, 7038 flow [2024-06-14 12:12:21,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 426 transitions, 6757 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:21,693 INFO L231 Difference]: Finished difference. Result has 235 places, 384 transitions, 6008 flow [2024-06-14 12:12:21,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6008, PETRI_PLACES=235, PETRI_TRANSITIONS=384} [2024-06-14 12:12:21,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-14 12:12:21,694 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 384 transitions, 6008 flow [2024-06-14 12:12:21,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:21,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:21,694 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 12:12:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:12:21,694 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 12:12:21,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash 996222853, now seen corresponding path program 9 times [2024-06-14 12:12:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:21,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041704886] [2024-06-14 12:12:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:21,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:22,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:22,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041704886] [2024-06-14 12:12:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041704886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:22,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:22,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:22,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918354741] [2024-06-14 12:12:22,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:22,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:22,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 384 transitions, 6008 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:22,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:22,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:22,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:24,265 INFO L124 PetriNetUnfolderBase]: 4022/6388 cut-off events. [2024-06-14 12:12:24,265 INFO L125 PetriNetUnfolderBase]: For 459433/459433 co-relation queries the response was YES. [2024-06-14 12:12:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56217 conditions, 6388 events. 4022/6388 cut-off events. For 459433/459433 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38979 event pairs, 817 based on Foata normal form. 24/6411 useless extension candidates. Maximal degree in co-relation 56104. Up to 5342 conditions per place. [2024-06-14 12:12:24,340 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 207 selfloop transitions, 211 changer transitions 0/422 dead transitions. [2024-06-14 12:12:24,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 422 transitions, 7218 flow [2024-06-14 12:12:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:12:24,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-14 12:12:24,341 INFO L175 Difference]: Start difference. First operand has 235 places, 384 transitions, 6008 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:12:24,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 422 transitions, 7218 flow [2024-06-14 12:12:25,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 422 transitions, 6817 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:25,085 INFO L231 Difference]: Finished difference. Result has 239 places, 386 transitions, 6173 flow [2024-06-14 12:12:25,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5617, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6173, PETRI_PLACES=239, PETRI_TRANSITIONS=386} [2024-06-14 12:12:25,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-14 12:12:25,086 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 386 transitions, 6173 flow [2024-06-14 12:12:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:25,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:25,086 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 12:12:25,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:12:25,086 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:25,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1701138679, now seen corresponding path program 10 times [2024-06-14 12:12:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929231191] [2024-06-14 12:12:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:25,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929231191] [2024-06-14 12:12:26,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929231191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:26,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:26,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:26,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136808289] [2024-06-14 12:12:26,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:26,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:26,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:26,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:26,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:26,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 386 transitions, 6173 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:26,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:26,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:26,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:27,642 INFO L124 PetriNetUnfolderBase]: 4108/6544 cut-off events. [2024-06-14 12:12:27,642 INFO L125 PetriNetUnfolderBase]: For 460201/460201 co-relation queries the response was YES. [2024-06-14 12:12:27,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57581 conditions, 6544 events. 4108/6544 cut-off events. For 460201/460201 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40272 event pairs, 817 based on Foata normal form. 18/6561 useless extension candidates. Maximal degree in co-relation 57466. Up to 5367 conditions per place. [2024-06-14 12:12:27,835 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 211 selfloop transitions, 215 changer transitions 0/430 dead transitions. [2024-06-14 12:12:27,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 430 transitions, 7447 flow [2024-06-14 12:12:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 12:12:27,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-14 12:12:27,836 INFO L175 Difference]: Start difference. First operand has 239 places, 386 transitions, 6173 flow. Second operand 10 states and 194 transitions. [2024-06-14 12:12:27,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 430 transitions, 7447 flow [2024-06-14 12:12:28,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 430 transitions, 6949 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:28,595 INFO L231 Difference]: Finished difference. Result has 242 places, 391 transitions, 6280 flow [2024-06-14 12:12:28,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6280, PETRI_PLACES=242, PETRI_TRANSITIONS=391} [2024-06-14 12:12:28,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 12:12:28,596 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 391 transitions, 6280 flow [2024-06-14 12:12:28,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:28,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:28,596 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 12:12:28,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:12:28,596 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:28,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash 739729783, now seen corresponding path program 11 times [2024-06-14 12:12:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:28,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229532645] [2024-06-14 12:12:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:28,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:29,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:29,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229532645] [2024-06-14 12:12:29,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229532645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:29,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:29,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:29,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427654068] [2024-06-14 12:12:29,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:29,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:29,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:29,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 391 transitions, 6280 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:29,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:29,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:29,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:31,250 INFO L124 PetriNetUnfolderBase]: 4169/6647 cut-off events. [2024-06-14 12:12:31,251 INFO L125 PetriNetUnfolderBase]: For 474181/474181 co-relation queries the response was YES. [2024-06-14 12:12:31,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58524 conditions, 6647 events. 4169/6647 cut-off events. For 474181/474181 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41188 event pairs, 831 based on Foata normal form. 18/6664 useless extension candidates. Maximal degree in co-relation 58407. Up to 5403 conditions per place. [2024-06-14 12:12:31,326 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 273 selfloop transitions, 158 changer transitions 0/435 dead transitions. [2024-06-14 12:12:31,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 435 transitions, 7765 flow [2024-06-14 12:12:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 12:12:31,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-14 12:12:31,328 INFO L175 Difference]: Start difference. First operand has 242 places, 391 transitions, 6280 flow. Second operand 10 states and 196 transitions. [2024-06-14 12:12:31,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 435 transitions, 7765 flow [2024-06-14 12:12:32,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 435 transitions, 7258 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:32,171 INFO L231 Difference]: Finished difference. Result has 245 places, 393 transitions, 6226 flow [2024-06-14 12:12:32,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5773, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6226, PETRI_PLACES=245, PETRI_TRANSITIONS=393} [2024-06-14 12:12:32,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 12:12:32,172 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 393 transitions, 6226 flow [2024-06-14 12:12:32,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:32,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:32,172 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 12:12:32,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:12:32,172 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 739722343, now seen corresponding path program 12 times [2024-06-14 12:12:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:32,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146117186] [2024-06-14 12:12:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:33,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146117186] [2024-06-14 12:12:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146117186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:33,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770367667] [2024-06-14 12:12:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:33,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:33,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:33,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 393 transitions, 6226 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:33,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:33,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:33,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:35,083 INFO L124 PetriNetUnfolderBase]: 4123/6577 cut-off events. [2024-06-14 12:12:35,083 INFO L125 PetriNetUnfolderBase]: For 456364/456364 co-relation queries the response was YES. [2024-06-14 12:12:35,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56026 conditions, 6577 events. 4123/6577 cut-off events. For 456364/456364 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40657 event pairs, 821 based on Foata normal form. 24/6600 useless extension candidates. Maximal degree in co-relation 55908. Up to 5721 conditions per place. [2024-06-14 12:12:35,166 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 153 changer transitions 0/435 dead transitions. [2024-06-14 12:12:35,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 435 transitions, 7385 flow [2024-06-14 12:12:35,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-14 12:12:35,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-14 12:12:35,167 INFO L175 Difference]: Start difference. First operand has 245 places, 393 transitions, 6226 flow. Second operand 11 states and 208 transitions. [2024-06-14 12:12:35,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 435 transitions, 7385 flow [2024-06-14 12:12:35,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 435 transitions, 6815 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:35,941 INFO L231 Difference]: Finished difference. Result has 247 places, 395 transitions, 6015 flow [2024-06-14 12:12:35,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6015, PETRI_PLACES=247, PETRI_TRANSITIONS=395} [2024-06-14 12:12:35,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 12:12:35,942 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 395 transitions, 6015 flow [2024-06-14 12:12:35,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:35,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:35,942 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 12:12:35,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:12:35,942 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 12:12:35,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:35,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1345663351, now seen corresponding path program 2 times [2024-06-14 12:12:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:35,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298861740] [2024-06-14 12:12:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298861740] [2024-06-14 12:12:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298861740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:36,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:36,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441424171] [2024-06-14 12:12:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:36,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:36,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:36,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 395 transitions, 6015 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:36,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:36,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:36,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:38,143 INFO L124 PetriNetUnfolderBase]: 4133/6591 cut-off events. [2024-06-14 12:12:38,143 INFO L125 PetriNetUnfolderBase]: For 411354/411354 co-relation queries the response was YES. [2024-06-14 12:12:38,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54660 conditions, 6591 events. 4133/6591 cut-off events. For 411354/411354 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40790 event pairs, 824 based on Foata normal form. 2/6592 useless extension candidates. Maximal degree in co-relation 54543. Up to 6299 conditions per place. [2024-06-14 12:12:38,236 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 368 selfloop transitions, 39 changer transitions 0/411 dead transitions. [2024-06-14 12:12:38,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 411 transitions, 7053 flow [2024-06-14 12:12:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:12:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:12:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:12:38,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 12:12:38,238 INFO L175 Difference]: Start difference. First operand has 247 places, 395 transitions, 6015 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:12:38,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 411 transitions, 7053 flow [2024-06-14 12:12:38,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 411 transitions, 6725 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:38,829 INFO L231 Difference]: Finished difference. Result has 245 places, 398 transitions, 5815 flow [2024-06-14 12:12:38,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5687, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5815, PETRI_PLACES=245, PETRI_TRANSITIONS=398} [2024-06-14 12:12:38,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 12:12:38,830 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 398 transitions, 5815 flow [2024-06-14 12:12:38,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:38,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:38,830 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 12:12:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:12:38,831 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 12:12:38,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1755998981, now seen corresponding path program 3 times [2024-06-14 12:12:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:38,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194463606] [2024-06-14 12:12:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:39,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:39,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194463606] [2024-06-14 12:12:39,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194463606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:39,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:39,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:39,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946686279] [2024-06-14 12:12:39,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:39,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:39,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:39,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:39,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:39,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 398 transitions, 5815 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:39,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:39,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:39,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:40,830 INFO L124 PetriNetUnfolderBase]: 4127/6585 cut-off events. [2024-06-14 12:12:40,831 INFO L125 PetriNetUnfolderBase]: For 417418/417418 co-relation queries the response was YES. [2024-06-14 12:12:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54043 conditions, 6585 events. 4127/6585 cut-off events. For 417418/417418 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40718 event pairs, 824 based on Foata normal form. 2/6586 useless extension candidates. Maximal degree in co-relation 53926. Up to 6294 conditions per place. [2024-06-14 12:12:40,912 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 373 selfloop transitions, 35 changer transitions 0/412 dead transitions. [2024-06-14 12:12:40,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 412 transitions, 6726 flow [2024-06-14 12:12:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:12:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:12:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:12:40,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-14 12:12:40,913 INFO L175 Difference]: Start difference. First operand has 245 places, 398 transitions, 5815 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:12:40,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 412 transitions, 6726 flow [2024-06-14 12:12:41,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 412 transitions, 6600 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:41,737 INFO L231 Difference]: Finished difference. Result has 247 places, 398 transitions, 5767 flow [2024-06-14 12:12:41,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5767, PETRI_PLACES=247, PETRI_TRANSITIONS=398} [2024-06-14 12:12:41,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-14 12:12:41,738 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 398 transitions, 5767 flow [2024-06-14 12:12:41,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:41,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:41,738 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 12:12:41,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:12:41,738 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:41,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1932945989, now seen corresponding path program 1 times [2024-06-14 12:12:41,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:41,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032250321] [2024-06-14 12:12:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:42,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:42,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032250321] [2024-06-14 12:12:42,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032250321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:42,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:42,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:42,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076504288] [2024-06-14 12:12:42,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:42,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:42,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:42,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:42,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:12:42,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 398 transitions, 5767 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:42,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:42,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:12:42,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:43,665 INFO L124 PetriNetUnfolderBase]: 4012/6477 cut-off events. [2024-06-14 12:12:43,665 INFO L125 PetriNetUnfolderBase]: For 384974/384974 co-relation queries the response was YES. [2024-06-14 12:12:43,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52134 conditions, 6477 events. 4012/6477 cut-off events. For 384974/384974 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40818 event pairs, 817 based on Foata normal form. 4/6475 useless extension candidates. Maximal degree in co-relation 52017. Up to 6130 conditions per place. [2024-06-14 12:12:43,737 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 29 changer transitions 0/424 dead transitions. [2024-06-14 12:12:43,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 424 transitions, 6909 flow [2024-06-14 12:12:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:12:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:12:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:12:43,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:12:43,739 INFO L175 Difference]: Start difference. First operand has 247 places, 398 transitions, 5767 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:12:43,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 424 transitions, 6909 flow [2024-06-14 12:12:44,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 424 transitions, 6840 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:44,390 INFO L231 Difference]: Finished difference. Result has 250 places, 408 transitions, 5908 flow [2024-06-14 12:12:44,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5908, PETRI_PLACES=250, PETRI_TRANSITIONS=408} [2024-06-14 12:12:44,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 12:12:44,391 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 408 transitions, 5908 flow [2024-06-14 12:12:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:44,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:44,391 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 12:12:44,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:12:44,391 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:44,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1345432153, now seen corresponding path program 2 times [2024-06-14 12:12:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:44,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582035798] [2024-06-14 12:12:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:44,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:45,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:45,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582035798] [2024-06-14 12:12:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582035798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:45,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:45,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:45,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544585035] [2024-06-14 12:12:45,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:45,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:45,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:45,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:45,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:12:45,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 408 transitions, 5908 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:45,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:12:45,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:46,428 INFO L124 PetriNetUnfolderBase]: 4022/6493 cut-off events. [2024-06-14 12:12:46,428 INFO L125 PetriNetUnfolderBase]: For 393605/393605 co-relation queries the response was YES. [2024-06-14 12:12:46,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52890 conditions, 6493 events. 4022/6493 cut-off events. For 393605/393605 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40904 event pairs, 818 based on Foata normal form. 2/6489 useless extension candidates. Maximal degree in co-relation 52771. Up to 6200 conditions per place. [2024-06-14 12:12:46,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 394 selfloop transitions, 23 changer transitions 0/426 dead transitions. [2024-06-14 12:12:46,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 426 transitions, 7012 flow [2024-06-14 12:12:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:12:46,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:12:46,495 INFO L175 Difference]: Start difference. First operand has 250 places, 408 transitions, 5908 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:12:46,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 426 transitions, 7012 flow [2024-06-14 12:12:47,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 426 transitions, 6930 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 12:12:47,134 INFO L231 Difference]: Finished difference. Result has 256 places, 414 transitions, 6000 flow [2024-06-14 12:12:47,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6000, PETRI_PLACES=256, PETRI_TRANSITIONS=414} [2024-06-14 12:12:47,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-14 12:12:47,135 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 414 transitions, 6000 flow [2024-06-14 12:12:47,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:47,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:47,135 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 12:12:47,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:12:47,135 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:47,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:47,135 INFO L85 PathProgramCache]: Analyzing trace with hash 819262333, now seen corresponding path program 3 times [2024-06-14 12:12:47,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:47,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158618551] [2024-06-14 12:12:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:47,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158618551] [2024-06-14 12:12:47,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158618551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:47,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:47,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397825784] [2024-06-14 12:12:47,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:47,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:47,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:12:47,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 414 transitions, 6000 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:47,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:47,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:12:47,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:49,028 INFO L124 PetriNetUnfolderBase]: 4016/6485 cut-off events. [2024-06-14 12:12:49,028 INFO L125 PetriNetUnfolderBase]: For 401507/401507 co-relation queries the response was YES. [2024-06-14 12:12:49,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52835 conditions, 6485 events. 4016/6485 cut-off events. For 401507/401507 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40869 event pairs, 817 based on Foata normal form. 2/6481 useless extension candidates. Maximal degree in co-relation 52713. Up to 6204 conditions per place. [2024-06-14 12:12:49,113 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 398 selfloop transitions, 17 changer transitions 0/424 dead transitions. [2024-06-14 12:12:49,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 424 transitions, 6858 flow [2024-06-14 12:12:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:12:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:12:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:12:49,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 12:12:49,114 INFO L175 Difference]: Start difference. First operand has 256 places, 414 transitions, 6000 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:12:49,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 424 transitions, 6858 flow [2024-06-14 12:12:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 424 transitions, 6732 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:49,876 INFO L231 Difference]: Finished difference. Result has 259 places, 414 transitions, 5915 flow [2024-06-14 12:12:49,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5915, PETRI_PLACES=259, PETRI_TRANSITIONS=414} [2024-06-14 12:12:49,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 12:12:49,876 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 414 transitions, 5915 flow [2024-06-14 12:12:49,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:49,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:49,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:12:49,877 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:49,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:49,877 INFO L85 PathProgramCache]: Analyzing trace with hash 642367918, now seen corresponding path program 1 times [2024-06-14 12:12:49,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:49,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670859836] [2024-06-14 12:12:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:49,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:50,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:50,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670859836] [2024-06-14 12:12:50,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670859836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:50,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:50,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996172752] [2024-06-14 12:12:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:50,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:50,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:51,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:51,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 414 transitions, 5915 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:51,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:51,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:51,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:52,616 INFO L124 PetriNetUnfolderBase]: 4247/6772 cut-off events. [2024-06-14 12:12:52,616 INFO L125 PetriNetUnfolderBase]: For 504288/504288 co-relation queries the response was YES. [2024-06-14 12:12:52,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56610 conditions, 6772 events. 4247/6772 cut-off events. For 504288/504288 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41809 event pairs, 647 based on Foata normal form. 18/6789 useless extension candidates. Maximal degree in co-relation 56488. Up to 6280 conditions per place. [2024-06-14 12:12:52,698 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 409 selfloop transitions, 46 changer transitions 0/459 dead transitions. [2024-06-14 12:12:52,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 459 transitions, 7331 flow [2024-06-14 12:12:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:12:52,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:12:52,699 INFO L175 Difference]: Start difference. First operand has 259 places, 414 transitions, 5915 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:12:52,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 459 transitions, 7331 flow [2024-06-14 12:12:53,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 459 transitions, 7287 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:53,569 INFO L231 Difference]: Finished difference. Result has 263 places, 416 transitions, 6100 flow [2024-06-14 12:12:53,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6100, PETRI_PLACES=263, PETRI_TRANSITIONS=416} [2024-06-14 12:12:53,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 12:12:53,570 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 416 transitions, 6100 flow [2024-06-14 12:12:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:53,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:53,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:53,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:12:53,570 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:53,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash 700460368, now seen corresponding path program 2 times [2024-06-14 12:12:53,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:53,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540766397] [2024-06-14 12:12:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:53,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:54,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:54,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540766397] [2024-06-14 12:12:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540766397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:54,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:54,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426812448] [2024-06-14 12:12:54,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:54,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:54,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:54,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:54,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 416 transitions, 6100 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:54,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:54,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:54,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:56,408 INFO L124 PetriNetUnfolderBase]: 4315/6888 cut-off events. [2024-06-14 12:12:56,409 INFO L125 PetriNetUnfolderBase]: For 528500/528500 co-relation queries the response was YES. [2024-06-14 12:12:56,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58292 conditions, 6888 events. 4315/6888 cut-off events. For 528500/528500 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 42987 event pairs, 817 based on Foata normal form. 18/6905 useless extension candidates. Maximal degree in co-relation 58169. Up to 6382 conditions per place. [2024-06-14 12:12:56,484 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 52 changer transitions 0/460 dead transitions. [2024-06-14 12:12:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 460 transitions, 7524 flow [2024-06-14 12:12:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:12:56,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:12:56,485 INFO L175 Difference]: Start difference. First operand has 263 places, 416 transitions, 6100 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:12:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 460 transitions, 7524 flow [2024-06-14 12:12:57,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 460 transitions, 7333 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:57,293 INFO L231 Difference]: Finished difference. Result has 265 places, 418 transitions, 6154 flow [2024-06-14 12:12:57,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6154, PETRI_PLACES=265, PETRI_TRANSITIONS=418} [2024-06-14 12:12:57,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-14 12:12:57,294 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 418 transitions, 6154 flow [2024-06-14 12:12:57,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:57,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:57,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:57,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:12:57,294 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:57,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:57,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1781396144, now seen corresponding path program 3 times [2024-06-14 12:12:57,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:57,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926203906] [2024-06-14 12:12:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:58,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:58,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926203906] [2024-06-14 12:12:58,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926203906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:58,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:58,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729712194] [2024-06-14 12:12:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:58,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:12:58,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 418 transitions, 6154 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:58,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:58,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:12:58,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:00,226 INFO L124 PetriNetUnfolderBase]: 4383/7004 cut-off events. [2024-06-14 12:13:00,226 INFO L125 PetriNetUnfolderBase]: For 555352/555352 co-relation queries the response was YES. [2024-06-14 12:13:00,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59188 conditions, 7004 events. 4383/7004 cut-off events. For 555352/555352 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43970 event pairs, 818 based on Foata normal form. 18/7021 useless extension candidates. Maximal degree in co-relation 59064. Up to 6189 conditions per place. [2024-06-14 12:13:00,305 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 365 selfloop transitions, 92 changer transitions 0/461 dead transitions. [2024-06-14 12:13:00,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 461 transitions, 7712 flow [2024-06-14 12:13:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:13:00,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-14 12:13:00,306 INFO L175 Difference]: Start difference. First operand has 265 places, 418 transitions, 6154 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:13:00,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 461 transitions, 7712 flow [2024-06-14 12:13:01,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 461 transitions, 7505 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:01,239 INFO L231 Difference]: Finished difference. Result has 267 places, 420 transitions, 6276 flow [2024-06-14 12:13:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6276, PETRI_PLACES=267, PETRI_TRANSITIONS=420} [2024-06-14 12:13:01,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 12:13:01,240 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 420 transitions, 6276 flow [2024-06-14 12:13:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:01,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:01,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:01,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:13:01,240 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:01,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1610578394, now seen corresponding path program 4 times [2024-06-14 12:13:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:01,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598061983] [2024-06-14 12:13:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:01,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:02,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:02,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598061983] [2024-06-14 12:13:02,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598061983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:02,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:02,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255704390] [2024-06-14 12:13:02,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:02,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:02,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:02,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:02,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 420 transitions, 6276 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:02,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:02,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:02,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:03,999 INFO L124 PetriNetUnfolderBase]: 4451/7120 cut-off events. [2024-06-14 12:13:03,999 INFO L125 PetriNetUnfolderBase]: For 571857/571857 co-relation queries the response was YES. [2024-06-14 12:13:04,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60317 conditions, 7120 events. 4451/7120 cut-off events. For 571857/571857 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44813 event pairs, 871 based on Foata normal form. 18/7137 useless extension candidates. Maximal degree in co-relation 60192. Up to 6523 conditions per place. [2024-06-14 12:13:04,081 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 95 changer transitions 0/459 dead transitions. [2024-06-14 12:13:04,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 459 transitions, 7570 flow [2024-06-14 12:13:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:13:04,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-14 12:13:04,083 INFO L175 Difference]: Start difference. First operand has 267 places, 420 transitions, 6276 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:13:04,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 459 transitions, 7570 flow [2024-06-14 12:13:04,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 459 transitions, 7279 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:04,938 INFO L231 Difference]: Finished difference. Result has 269 places, 422 transitions, 6324 flow [2024-06-14 12:13:04,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5985, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6324, PETRI_PLACES=269, PETRI_TRANSITIONS=422} [2024-06-14 12:13:04,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 12:13:04,938 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 422 transitions, 6324 flow [2024-06-14 12:13:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:04,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:04,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:04,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:13:04,939 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:04,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:04,939 INFO L85 PathProgramCache]: Analyzing trace with hash -999333104, now seen corresponding path program 1 times [2024-06-14 12:13:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:04,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180606449] [2024-06-14 12:13:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:05,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180606449] [2024-06-14 12:13:05,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180606449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:05,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:05,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97137100] [2024-06-14 12:13:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:05,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:05,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:05,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:05,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 422 transitions, 6324 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:05,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:05,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:05,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:06,972 INFO L124 PetriNetUnfolderBase]: 4463/7144 cut-off events. [2024-06-14 12:13:06,972 INFO L125 PetriNetUnfolderBase]: For 551794/551794 co-relation queries the response was YES. [2024-06-14 12:13:07,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59619 conditions, 7144 events. 4463/7144 cut-off events. For 551794/551794 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45042 event pairs, 908 based on Foata normal form. 12/7155 useless extension candidates. Maximal degree in co-relation 59493. Up to 6668 conditions per place. [2024-06-14 12:13:07,062 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 358 selfloop transitions, 94 changer transitions 0/456 dead transitions. [2024-06-14 12:13:07,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 456 transitions, 7788 flow [2024-06-14 12:13:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:13:07,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-14 12:13:07,063 INFO L175 Difference]: Start difference. First operand has 269 places, 422 transitions, 6324 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:13:07,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 456 transitions, 7788 flow [2024-06-14 12:13:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 456 transitions, 7457 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:08,079 INFO L231 Difference]: Finished difference. Result has 268 places, 437 transitions, 6588 flow [2024-06-14 12:13:08,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6023, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6588, PETRI_PLACES=268, PETRI_TRANSITIONS=437} [2024-06-14 12:13:08,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 12:13:08,080 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 437 transitions, 6588 flow [2024-06-14 12:13:08,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:08,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:08,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:08,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:13:08,080 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:08,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash -993619184, now seen corresponding path program 2 times [2024-06-14 12:13:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:08,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048315546] [2024-06-14 12:13:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:08,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:08,762 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 12:13:08,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:08,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048315546] [2024-06-14 12:13:08,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048315546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:08,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:08,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:08,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683056425] [2024-06-14 12:13:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:08,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:08,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:08,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 437 transitions, 6588 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:08,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:08,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:08,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:10,235 INFO L124 PetriNetUnfolderBase]: 4455/7135 cut-off events. [2024-06-14 12:13:10,235 INFO L125 PetriNetUnfolderBase]: For 528271/528271 co-relation queries the response was YES. [2024-06-14 12:13:10,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58738 conditions, 7135 events. 4455/7135 cut-off events. For 528271/528271 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 44980 event pairs, 907 based on Foata normal form. 4/7138 useless extension candidates. Maximal degree in co-relation 58611. Up to 6890 conditions per place. [2024-06-14 12:13:10,327 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 39 changer transitions 0/457 dead transitions. [2024-06-14 12:13:10,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 457 transitions, 7684 flow [2024-06-14 12:13:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:13:10,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:13:10,328 INFO L175 Difference]: Start difference. First operand has 268 places, 437 transitions, 6588 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:13:10,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 457 transitions, 7684 flow [2024-06-14 12:13:11,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 457 transitions, 7499 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:11,354 INFO L231 Difference]: Finished difference. Result has 273 places, 444 transitions, 6658 flow [2024-06-14 12:13:11,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6658, PETRI_PLACES=273, PETRI_TRANSITIONS=444} [2024-06-14 12:13:11,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 12:13:11,354 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 444 transitions, 6658 flow [2024-06-14 12:13:11,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:11,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:11,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:11,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:13:11,355 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:11,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash -993611248, now seen corresponding path program 1 times [2024-06-14 12:13:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207556198] [2024-06-14 12:13:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:11,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:12,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207556198] [2024-06-14 12:13:12,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207556198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:12,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:12,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:12,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824382281] [2024-06-14 12:13:12,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:12,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:12,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:12,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 444 transitions, 6658 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:12,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:12,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:12,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:13,692 INFO L124 PetriNetUnfolderBase]: 4475/7163 cut-off events. [2024-06-14 12:13:13,692 INFO L125 PetriNetUnfolderBase]: For 541504/541504 co-relation queries the response was YES. [2024-06-14 12:13:13,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58902 conditions, 7163 events. 4475/7163 cut-off events. For 541504/541504 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45153 event pairs, 912 based on Foata normal form. 4/7166 useless extension candidates. Maximal degree in co-relation 58773. Up to 6811 conditions per place. [2024-06-14 12:13:13,782 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 47 changer transitions 0/472 dead transitions. [2024-06-14 12:13:13,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 472 transitions, 7932 flow [2024-06-14 12:13:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:13:13,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:13:13,783 INFO L175 Difference]: Start difference. First operand has 273 places, 444 transitions, 6658 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:13:13,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 472 transitions, 7932 flow [2024-06-14 12:13:14,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 472 transitions, 7800 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:14,762 INFO L231 Difference]: Finished difference. Result has 276 places, 450 transitions, 6724 flow [2024-06-14 12:13:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6724, PETRI_PLACES=276, PETRI_TRANSITIONS=450} [2024-06-14 12:13:14,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 12:13:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 450 transitions, 6724 flow [2024-06-14 12:13:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:14,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:13:14,763 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:14,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash 477683024, now seen corresponding path program 5 times [2024-06-14 12:13:14,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:14,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589782797] [2024-06-14 12:13:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:15,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:15,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589782797] [2024-06-14 12:13:15,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589782797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:15,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:15,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259821192] [2024-06-14 12:13:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:16,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:16,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 450 transitions, 6724 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:16,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:16,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:16,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:17,719 INFO L124 PetriNetUnfolderBase]: 4482/7175 cut-off events. [2024-06-14 12:13:17,720 INFO L125 PetriNetUnfolderBase]: For 569234/569234 co-relation queries the response was YES. [2024-06-14 12:13:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59068 conditions, 7175 events. 4482/7175 cut-off events. For 569234/569234 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45198 event pairs, 864 based on Foata normal form. 18/7192 useless extension candidates. Maximal degree in co-relation 58938. Up to 6208 conditions per place. [2024-06-14 12:13:17,810 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 131 changer transitions 0/491 dead transitions. [2024-06-14 12:13:17,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 491 transitions, 8347 flow [2024-06-14 12:13:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:13:17,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-14 12:13:17,811 INFO L175 Difference]: Start difference. First operand has 276 places, 450 transitions, 6724 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:13:17,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 491 transitions, 8347 flow [2024-06-14 12:13:18,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 491 transitions, 8275 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:18,762 INFO L231 Difference]: Finished difference. Result has 281 places, 450 transitions, 6867 flow [2024-06-14 12:13:18,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6867, PETRI_PLACES=281, PETRI_TRANSITIONS=450} [2024-06-14 12:13:18,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 12:13:18,763 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 450 transitions, 6867 flow [2024-06-14 12:13:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:18,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:18,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:13:18,763 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:18,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1734996860, now seen corresponding path program 3 times [2024-06-14 12:13:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:18,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677283258] [2024-06-14 12:13:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:19,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:19,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677283258] [2024-06-14 12:13:19,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677283258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:19,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:19,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:19,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313485643] [2024-06-14 12:13:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:19,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:19,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:19,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:19,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 450 transitions, 6867 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:19,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:19,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:19,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:20,768 INFO L124 PetriNetUnfolderBase]: 4502/7210 cut-off events. [2024-06-14 12:13:20,769 INFO L125 PetriNetUnfolderBase]: For 557012/557016 co-relation queries the response was YES. [2024-06-14 12:13:20,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60123 conditions, 7210 events. 4502/7210 cut-off events. For 557012/557016 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45476 event pairs, 915 based on Foata normal form. 8/7217 useless extension candidates. Maximal degree in co-relation 59991. Up to 6564 conditions per place. [2024-06-14 12:13:20,866 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 120 changer transitions 0/475 dead transitions. [2024-06-14 12:13:20,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 475 transitions, 8278 flow [2024-06-14 12:13:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:13:20,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-14 12:13:20,867 INFO L175 Difference]: Start difference. First operand has 281 places, 450 transitions, 6867 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:13:20,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 475 transitions, 8278 flow [2024-06-14 12:13:21,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 475 transitions, 7889 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:21,920 INFO L231 Difference]: Finished difference. Result has 280 places, 457 transitions, 6864 flow [2024-06-14 12:13:21,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6490, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6864, PETRI_PLACES=280, PETRI_TRANSITIONS=457} [2024-06-14 12:13:21,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-14 12:13:21,921 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 457 transitions, 6864 flow [2024-06-14 12:13:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:21,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:21,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:21,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:13:21,921 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:21,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1123689626, now seen corresponding path program 4 times [2024-06-14 12:13:21,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:21,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568865028] [2024-06-14 12:13:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:21,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:22,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:22,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568865028] [2024-06-14 12:13:22,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568865028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:22,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:22,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:22,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419817319] [2024-06-14 12:13:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:22,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:22,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:22,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 457 transitions, 6864 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:22,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:22,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:22,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:24,010 INFO L124 PetriNetUnfolderBase]: 4506/7216 cut-off events. [2024-06-14 12:13:24,010 INFO L125 PetriNetUnfolderBase]: For 548735/548739 co-relation queries the response was YES. [2024-06-14 12:13:24,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59234 conditions, 7216 events. 4506/7216 cut-off events. For 548735/548739 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45472 event pairs, 914 based on Foata normal form. 8/7223 useless extension candidates. Maximal degree in co-relation 59101. Up to 6565 conditions per place. [2024-06-14 12:13:24,112 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 142 changer transitions 0/478 dead transitions. [2024-06-14 12:13:24,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 478 transitions, 8132 flow [2024-06-14 12:13:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:13:24,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-14 12:13:24,113 INFO L175 Difference]: Start difference. First operand has 280 places, 457 transitions, 6864 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:13:24,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 478 transitions, 8132 flow [2024-06-14 12:13:25,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 478 transitions, 7907 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:25,129 INFO L231 Difference]: Finished difference. Result has 283 places, 462 transitions, 7034 flow [2024-06-14 12:13:25,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7034, PETRI_PLACES=283, PETRI_TRANSITIONS=462} [2024-06-14 12:13:25,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-14 12:13:25,130 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 462 transitions, 7034 flow [2024-06-14 12:13:25,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:25,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:25,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:25,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:13:25,131 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:25,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1247002062, now seen corresponding path program 5 times [2024-06-14 12:13:25,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:25,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441656526] [2024-06-14 12:13:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:25,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:25,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441656526] [2024-06-14 12:13:25,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441656526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:25,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:25,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:25,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810308442] [2024-06-14 12:13:25,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:25,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:25,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:25,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:25,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 462 transitions, 7034 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:25,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:25,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:27,159 INFO L124 PetriNetUnfolderBase]: 4488/7189 cut-off events. [2024-06-14 12:13:27,159 INFO L125 PetriNetUnfolderBase]: For 551821/551825 co-relation queries the response was YES. [2024-06-14 12:13:27,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59053 conditions, 7189 events. 4488/7189 cut-off events. For 551821/551825 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45309 event pairs, 904 based on Foata normal form. 6/7194 useless extension candidates. Maximal degree in co-relation 58919. Up to 6945 conditions per place. [2024-06-14 12:13:27,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 435 selfloop transitions, 33 changer transitions 0/472 dead transitions. [2024-06-14 12:13:27,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 472 transitions, 8009 flow [2024-06-14 12:13:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:13:27,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-14 12:13:27,254 INFO L175 Difference]: Start difference. First operand has 283 places, 462 transitions, 7034 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:13:27,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 472 transitions, 8009 flow [2024-06-14 12:13:28,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 472 transitions, 7778 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:28,288 INFO L231 Difference]: Finished difference. Result has 286 places, 462 transitions, 6877 flow [2024-06-14 12:13:28,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6877, PETRI_PLACES=286, PETRI_TRANSITIONS=462} [2024-06-14 12:13:28,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 12:13:28,289 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 462 transitions, 6877 flow [2024-06-14 12:13:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:28,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:28,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:28,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:13:28,289 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:28,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1267580156, now seen corresponding path program 6 times [2024-06-14 12:13:28,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:28,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389082459] [2024-06-14 12:13:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:28,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:28,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389082459] [2024-06-14 12:13:28,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389082459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:28,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:28,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898616257] [2024-06-14 12:13:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:28,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:28,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:28,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:28,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 462 transitions, 6877 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:28,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:28,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:28,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:30,494 INFO L124 PetriNetUnfolderBase]: 4427/7084 cut-off events. [2024-06-14 12:13:30,494 INFO L125 PetriNetUnfolderBase]: For 557300/557304 co-relation queries the response was YES. [2024-06-14 12:13:30,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57827 conditions, 7084 events. 4427/7084 cut-off events. For 557300/557304 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 44496 event pairs, 897 based on Foata normal form. 6/7089 useless extension candidates. Maximal degree in co-relation 57692. Up to 6812 conditions per place. [2024-06-14 12:13:30,574 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 57 changer transitions 0/474 dead transitions. [2024-06-14 12:13:30,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 474 transitions, 8019 flow [2024-06-14 12:13:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:13:30,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:13:30,575 INFO L175 Difference]: Start difference. First operand has 286 places, 462 transitions, 6877 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:13:30,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 474 transitions, 8019 flow [2024-06-14 12:13:31,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 474 transitions, 7899 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:31,504 INFO L231 Difference]: Finished difference. Result has 290 places, 462 transitions, 6885 flow [2024-06-14 12:13:31,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6763, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6885, PETRI_PLACES=290, PETRI_TRANSITIONS=462} [2024-06-14 12:13:31,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-14 12:13:31,505 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 462 transitions, 6885 flow [2024-06-14 12:13:31,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:31,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:31,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:31,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:13:31,506 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:31,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash -372854002, now seen corresponding path program 2 times [2024-06-14 12:13:31,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:31,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005950974] [2024-06-14 12:13:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:32,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:32,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005950974] [2024-06-14 12:13:32,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005950974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:32,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:32,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955913657] [2024-06-14 12:13:32,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:32,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:32,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:32,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:32,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 462 transitions, 6885 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:32,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:32,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:32,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:33,859 INFO L124 PetriNetUnfolderBase]: 4479/7153 cut-off events. [2024-06-14 12:13:33,859 INFO L125 PetriNetUnfolderBase]: For 587965/587965 co-relation queries the response was YES. [2024-06-14 12:13:33,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58766 conditions, 7153 events. 4479/7153 cut-off events. For 587965/587965 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 44912 event pairs, 903 based on Foata normal form. 4/7156 useless extension candidates. Maximal degree in co-relation 58631. Up to 6769 conditions per place. [2024-06-14 12:13:33,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 54 changer transitions 0/487 dead transitions. [2024-06-14 12:13:33,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 487 transitions, 8343 flow [2024-06-14 12:13:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:13:33,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:13:33,957 INFO L175 Difference]: Start difference. First operand has 290 places, 462 transitions, 6885 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:13:33,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 487 transitions, 8343 flow [2024-06-14 12:13:35,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 487 transitions, 7991 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:35,064 INFO L231 Difference]: Finished difference. Result has 290 places, 468 transitions, 6743 flow [2024-06-14 12:13:35,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6533, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6743, PETRI_PLACES=290, PETRI_TRANSITIONS=468} [2024-06-14 12:13:35,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-14 12:13:35,065 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 468 transitions, 6743 flow [2024-06-14 12:13:35,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:35,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:35,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:35,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:13:35,065 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:35,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash -372840982, now seen corresponding path program 3 times [2024-06-14 12:13:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:35,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765070380] [2024-06-14 12:13:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:35,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765070380] [2024-06-14 12:13:35,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765070380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:35,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:35,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:35,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753168842] [2024-06-14 12:13:35,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:35,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:35,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:35,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:35,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 468 transitions, 6743 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:35,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:35,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:35,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:37,378 INFO L124 PetriNetUnfolderBase]: 4467/7138 cut-off events. [2024-06-14 12:13:37,378 INFO L125 PetriNetUnfolderBase]: For 588595/588595 co-relation queries the response was YES. [2024-06-14 12:13:37,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58456 conditions, 7138 events. 4467/7138 cut-off events. For 588595/588595 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44827 event pairs, 962 based on Foata normal form. 4/7141 useless extension candidates. Maximal degree in co-relation 58320. Up to 6913 conditions per place. [2024-06-14 12:13:37,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 456 selfloop transitions, 20 changer transitions 0/480 dead transitions. [2024-06-14 12:13:37,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 480 transitions, 7743 flow [2024-06-14 12:13:37,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:13:37,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:13:37,481 INFO L175 Difference]: Start difference. First operand has 290 places, 468 transitions, 6743 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:13:37,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 480 transitions, 7743 flow [2024-06-14 12:13:38,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 480 transitions, 7610 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:38,575 INFO L231 Difference]: Finished difference. Result has 294 places, 468 transitions, 6657 flow [2024-06-14 12:13:38,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6657, PETRI_PLACES=294, PETRI_TRANSITIONS=468} [2024-06-14 12:13:38,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 12:13:38,576 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 468 transitions, 6657 flow [2024-06-14 12:13:38,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:38,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:38,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:38,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:13:38,576 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:38,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:38,576 INFO L85 PathProgramCache]: Analyzing trace with hash -385741012, now seen corresponding path program 4 times [2024-06-14 12:13:38,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:38,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27200284] [2024-06-14 12:13:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:39,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:39,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27200284] [2024-06-14 12:13:39,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27200284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:39,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:39,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723931277] [2024-06-14 12:13:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:39,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:39,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 468 transitions, 6657 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:39,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:39,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:40,986 INFO L124 PetriNetUnfolderBase]: 4455/7124 cut-off events. [2024-06-14 12:13:40,987 INFO L125 PetriNetUnfolderBase]: For 589325/589325 co-relation queries the response was YES. [2024-06-14 12:13:41,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57982 conditions, 7124 events. 4455/7124 cut-off events. For 589325/589325 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44725 event pairs, 897 based on Foata normal form. 4/7127 useless extension candidates. Maximal degree in co-relation 57845. Up to 6753 conditions per place. [2024-06-14 12:13:41,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 50 changer transitions 0/486 dead transitions. [2024-06-14 12:13:41,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 486 transitions, 7735 flow [2024-06-14 12:13:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:13:41,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:13:41,081 INFO L175 Difference]: Start difference. First operand has 294 places, 468 transitions, 6657 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:13:41,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 486 transitions, 7735 flow [2024-06-14 12:13:42,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 486 transitions, 7614 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 12:13:42,092 INFO L231 Difference]: Finished difference. Result has 292 places, 468 transitions, 6642 flow [2024-06-14 12:13:42,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6642, PETRI_PLACES=292, PETRI_TRANSITIONS=468} [2024-06-14 12:13:42,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 12:13:42,092 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 468 transitions, 6642 flow [2024-06-14 12:13:42,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:42,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:42,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:42,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:13:42,093 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:42,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash -755045682, now seen corresponding path program 7 times [2024-06-14 12:13:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544128312] [2024-06-14 12:13:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:42,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544128312] [2024-06-14 12:13:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544128312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:42,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:42,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345495438] [2024-06-14 12:13:42,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:42,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:42,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:13:42,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 468 transitions, 6642 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:42,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:42,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:13:42,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:44,129 INFO L124 PetriNetUnfolderBase]: 4375/6981 cut-off events. [2024-06-14 12:13:44,129 INFO L125 PetriNetUnfolderBase]: For 588334/588334 co-relation queries the response was YES. [2024-06-14 12:13:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56890 conditions, 6981 events. 4375/6981 cut-off events. For 588334/588334 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43636 event pairs, 871 based on Foata normal form. 2/6982 useless extension candidates. Maximal degree in co-relation 56754. Up to 6739 conditions per place. [2024-06-14 12:13:44,220 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 443 selfloop transitions, 41 changer transitions 0/488 dead transitions. [2024-06-14 12:13:44,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 488 transitions, 7691 flow [2024-06-14 12:13:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:13:44,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:13:44,221 INFO L175 Difference]: Start difference. First operand has 292 places, 468 transitions, 6642 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:13:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 488 transitions, 7691 flow [2024-06-14 12:13:45,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 488 transitions, 7490 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:45,304 INFO L231 Difference]: Finished difference. Result has 293 places, 469 transitions, 6567 flow [2024-06-14 12:13:45,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6567, PETRI_PLACES=293, PETRI_TRANSITIONS=469} [2024-06-14 12:13:45,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-14 12:13:45,305 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 469 transitions, 6567 flow [2024-06-14 12:13:45,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:45,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:45,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:13:45,314 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:45,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1119888282, now seen corresponding path program 1 times [2024-06-14 12:13:45,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:45,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118510798] [2024-06-14 12:13:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:45,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:46,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118510798] [2024-06-14 12:13:46,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118510798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:46,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:46,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:46,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694079720] [2024-06-14 12:13:46,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:46,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:46,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:46,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:13:46,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 469 transitions, 6567 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:46,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:46,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:13:46,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:47,381 INFO L124 PetriNetUnfolderBase]: 4205/6797 cut-off events. [2024-06-14 12:13:47,381 INFO L125 PetriNetUnfolderBase]: For 515572/515580 co-relation queries the response was YES. [2024-06-14 12:13:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53807 conditions, 6797 events. 4205/6797 cut-off events. For 515572/515580 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43331 event pairs, 881 based on Foata normal form. 1/6782 useless extension candidates. Maximal degree in co-relation 53669. Up to 6472 conditions per place. [2024-06-14 12:13:47,475 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 455 selfloop transitions, 27 changer transitions 0/491 dead transitions. [2024-06-14 12:13:47,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 491 transitions, 7905 flow [2024-06-14 12:13:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:13:47,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 12:13:47,476 INFO L175 Difference]: Start difference. First operand has 293 places, 469 transitions, 6567 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:13:47,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 491 transitions, 7905 flow [2024-06-14 12:13:48,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 491 transitions, 7732 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:48,453 INFO L231 Difference]: Finished difference. Result has 292 places, 475 transitions, 6632 flow [2024-06-14 12:13:48,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6632, PETRI_PLACES=292, PETRI_TRANSITIONS=475} [2024-06-14 12:13:48,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 12:13:48,454 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 475 transitions, 6632 flow [2024-06-14 12:13:48,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:48,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:48,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:48,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:13:48,454 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:48,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:48,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1119978492, now seen corresponding path program 2 times [2024-06-14 12:13:48,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:48,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332398277] [2024-06-14 12:13:48,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:48,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:49,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332398277] [2024-06-14 12:13:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332398277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:49,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:49,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495414443] [2024-06-14 12:13:49,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:49,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:49,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:13:49,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 475 transitions, 6632 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:49,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:49,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:13:49,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:50,719 INFO L124 PetriNetUnfolderBase]: 4229/6831 cut-off events. [2024-06-14 12:13:50,719 INFO L125 PetriNetUnfolderBase]: For 529188/529192 co-relation queries the response was YES. [2024-06-14 12:13:50,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54579 conditions, 6831 events. 4229/6831 cut-off events. For 529188/529192 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43489 event pairs, 884 based on Foata normal form. 1/6820 useless extension candidates. Maximal degree in co-relation 54440. Up to 6525 conditions per place. [2024-06-14 12:13:50,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 23 changer transitions 0/487 dead transitions. [2024-06-14 12:13:50,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 487 transitions, 7622 flow [2024-06-14 12:13:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:13:50,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:13:50,811 INFO L175 Difference]: Start difference. First operand has 292 places, 475 transitions, 6632 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:13:50,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 487 transitions, 7622 flow [2024-06-14 12:13:52,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 487 transitions, 7456 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:52,153 INFO L231 Difference]: Finished difference. Result has 296 places, 475 transitions, 6518 flow [2024-06-14 12:13:52,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6518, PETRI_PLACES=296, PETRI_TRANSITIONS=475} [2024-06-14 12:13:52,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-14 12:13:52,153 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 475 transitions, 6518 flow [2024-06-14 12:13:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:52,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:52,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:13:52,154 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:52,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1123703297, now seen corresponding path program 1 times [2024-06-14 12:13:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:52,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182225904] [2024-06-14 12:13:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:52,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:52,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182225904] [2024-06-14 12:13:52,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182225904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:52,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:52,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:52,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229974334] [2024-06-14 12:13:52,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:52,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:52,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:52,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:13:52,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 475 transitions, 6518 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:52,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:52,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:13:52,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:54,429 INFO L124 PetriNetUnfolderBase]: 4212/6805 cut-off events. [2024-06-14 12:13:54,429 INFO L125 PetriNetUnfolderBase]: For 538771/538775 co-relation queries the response was YES. [2024-06-14 12:13:54,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54385 conditions, 6805 events. 4212/6805 cut-off events. For 538771/538775 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43309 event pairs, 880 based on Foata normal form. 2/6795 useless extension candidates. Maximal degree in co-relation 54244. Up to 6444 conditions per place. [2024-06-14 12:13:54,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 450 selfloop transitions, 36 changer transitions 0/495 dead transitions. [2024-06-14 12:13:54,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 495 transitions, 7738 flow [2024-06-14 12:13:54,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:13:54,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:13:54,508 INFO L175 Difference]: Start difference. First operand has 296 places, 475 transitions, 6518 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:13:54,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 495 transitions, 7738 flow [2024-06-14 12:13:55,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 495 transitions, 7673 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:55,493 INFO L231 Difference]: Finished difference. Result has 298 places, 478 transitions, 6569 flow [2024-06-14 12:13:55,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=298, PETRI_TRANSITIONS=478} [2024-06-14 12:13:55,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-14 12:13:55,494 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 478 transitions, 6569 flow [2024-06-14 12:13:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:55,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:55,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:13:55,494 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:55,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 208212651, now seen corresponding path program 2 times [2024-06-14 12:13:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:55,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036422486] [2024-06-14 12:13:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:55,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:56,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:56,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036422486] [2024-06-14 12:13:56,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036422486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:56,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:56,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:56,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105101336] [2024-06-14 12:13:56,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:56,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:56,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:13:56,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 478 transitions, 6569 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:56,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:56,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:13:56,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:57,484 INFO L124 PetriNetUnfolderBase]: 4217/6816 cut-off events. [2024-06-14 12:13:57,484 INFO L125 PetriNetUnfolderBase]: For 550837/550841 co-relation queries the response was YES. [2024-06-14 12:13:57,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54658 conditions, 6816 events. 4217/6816 cut-off events. For 550837/550841 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43432 event pairs, 877 based on Foata normal form. 2/6806 useless extension candidates. Maximal degree in co-relation 54516. Up to 6452 conditions per place. [2024-06-14 12:13:57,573 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 42 changer transitions 0/500 dead transitions. [2024-06-14 12:13:57,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 500 transitions, 7815 flow [2024-06-14 12:13:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:13:57,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-14 12:13:57,574 INFO L175 Difference]: Start difference. First operand has 298 places, 478 transitions, 6569 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:13:57,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 500 transitions, 7815 flow [2024-06-14 12:13:58,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 500 transitions, 7711 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:58,769 INFO L231 Difference]: Finished difference. Result has 299 places, 481 transitions, 6599 flow [2024-06-14 12:13:58,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6599, PETRI_PLACES=299, PETRI_TRANSITIONS=481} [2024-06-14 12:13:58,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 12:13:58,770 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 481 transitions, 6599 flow [2024-06-14 12:13:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:58,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:58,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:58,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:13:58,771 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:13:58,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash 73873153, now seen corresponding path program 3 times [2024-06-14 12:13:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510064283] [2024-06-14 12:13:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:58,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:59,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:59,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510064283] [2024-06-14 12:13:59,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510064283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:59,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:59,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295430357] [2024-06-14 12:13:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:59,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:59,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:59,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:59,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:59,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:13:59,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 481 transitions, 6599 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:59,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:59,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:13:59,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:00,965 INFO L124 PetriNetUnfolderBase]: 4227/6828 cut-off events. [2024-06-14 12:14:00,965 INFO L125 PetriNetUnfolderBase]: For 564391/564395 co-relation queries the response was YES. [2024-06-14 12:14:01,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54876 conditions, 6828 events. 4227/6828 cut-off events. For 564391/564395 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43517 event pairs, 880 based on Foata normal form. 2/6818 useless extension candidates. Maximal degree in co-relation 54733. Up to 6528 conditions per place. [2024-06-14 12:14:01,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 25 changer transitions 0/497 dead transitions. [2024-06-14 12:14:01,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 497 transitions, 7657 flow [2024-06-14 12:14:01,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 12:14:01,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-14 12:14:01,061 INFO L175 Difference]: Start difference. First operand has 299 places, 481 transitions, 6599 flow. Second operand 8 states and 138 transitions. [2024-06-14 12:14:01,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 497 transitions, 7657 flow [2024-06-14 12:14:02,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 497 transitions, 7556 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:02,014 INFO L231 Difference]: Finished difference. Result has 303 places, 484 transitions, 6604 flow [2024-06-14 12:14:02,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6604, PETRI_PLACES=303, PETRI_TRANSITIONS=484} [2024-06-14 12:14:02,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 12:14:02,015 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 484 transitions, 6604 flow [2024-06-14 12:14:02,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:02,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:02,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:02,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:14:02,015 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:02,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash -372669707, now seen corresponding path program 4 times [2024-06-14 12:14:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:02,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361017210] [2024-06-14 12:14:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361017210] [2024-06-14 12:14:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361017210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:02,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:02,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776083631] [2024-06-14 12:14:02,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:02,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:02,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 484 transitions, 6604 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:02,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:02,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:02,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:04,228 INFO L124 PetriNetUnfolderBase]: 4221/6820 cut-off events. [2024-06-14 12:14:04,228 INFO L125 PetriNetUnfolderBase]: For 567523/567527 co-relation queries the response was YES. [2024-06-14 12:14:04,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54709 conditions, 6820 events. 4221/6820 cut-off events. For 567523/567527 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43402 event pairs, 881 based on Foata normal form. 2/6810 useless extension candidates. Maximal degree in co-relation 54565. Up to 6529 conditions per place. [2024-06-14 12:14:04,313 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 467 selfloop transitions, 20 changer transitions 0/496 dead transitions. [2024-06-14 12:14:04,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 496 transitions, 7612 flow [2024-06-14 12:14:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:14:04,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:14:04,314 INFO L175 Difference]: Start difference. First operand has 303 places, 484 transitions, 6604 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:14:04,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 496 transitions, 7612 flow [2024-06-14 12:14:05,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 496 transitions, 7530 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:05,728 INFO L231 Difference]: Finished difference. Result has 305 places, 484 transitions, 6568 flow [2024-06-14 12:14:05,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=305, PETRI_TRANSITIONS=484} [2024-06-14 12:14:05,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-14 12:14:05,729 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 484 transitions, 6568 flow [2024-06-14 12:14:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:05,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:05,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:05,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:14:05,730 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:05,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash -372392660, now seen corresponding path program 1 times [2024-06-14 12:14:05,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:05,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766501781] [2024-06-14 12:14:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:05,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:06,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:06,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766501781] [2024-06-14 12:14:06,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766501781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:06,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:06,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:06,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427539762] [2024-06-14 12:14:06,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:06,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:06,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:06,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:06,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 484 transitions, 6568 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:06,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:06,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:06,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:08,327 INFO L124 PetriNetUnfolderBase]: 4408/7028 cut-off events. [2024-06-14 12:14:08,327 INFO L125 PetriNetUnfolderBase]: For 666054/666054 co-relation queries the response was YES. [2024-06-14 12:14:08,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57945 conditions, 7028 events. 4408/7028 cut-off events. For 666054/666054 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 43866 event pairs, 950 based on Foata normal form. 2/7029 useless extension candidates. Maximal degree in co-relation 57800. Up to 6817 conditions per place. [2024-06-14 12:14:08,429 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 474 selfloop transitions, 19 changer transitions 0/497 dead transitions. [2024-06-14 12:14:08,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 497 transitions, 7618 flow [2024-06-14 12:14:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:14:08,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:14:08,429 INFO L175 Difference]: Start difference. First operand has 305 places, 484 transitions, 6568 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:14:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 497 transitions, 7618 flow [2024-06-14 12:14:09,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 497 transitions, 7525 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:09,830 INFO L231 Difference]: Finished difference. Result has 305 places, 486 transitions, 6558 flow [2024-06-14 12:14:09,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6558, PETRI_PLACES=305, PETRI_TRANSITIONS=486} [2024-06-14 12:14:09,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-14 12:14:09,831 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 486 transitions, 6558 flow [2024-06-14 12:14:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:09,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:09,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:09,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:14:09,831 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:09,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1768444914, now seen corresponding path program 1 times [2024-06-14 12:14:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:09,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056800875] [2024-06-14 12:14:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:10,699 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 12:14:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:10,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056800875] [2024-06-14 12:14:10,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056800875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:10,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:10,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:10,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696382363] [2024-06-14 12:14:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:10,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:10,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 486 transitions, 6558 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:10,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:10,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:10,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:12,346 INFO L124 PetriNetUnfolderBase]: 4410/7031 cut-off events. [2024-06-14 12:14:12,346 INFO L125 PetriNetUnfolderBase]: For 675246/675246 co-relation queries the response was YES. [2024-06-14 12:14:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58094 conditions, 7031 events. 4410/7031 cut-off events. For 675246/675246 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 43858 event pairs, 879 based on Foata normal form. 2/7032 useless extension candidates. Maximal degree in co-relation 57948. Up to 6729 conditions per place. [2024-06-14 12:14:12,443 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 463 selfloop transitions, 47 changer transitions 0/514 dead transitions. [2024-06-14 12:14:12,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 514 transitions, 7869 flow [2024-06-14 12:14:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:14:12,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:14:12,444 INFO L175 Difference]: Start difference. First operand has 305 places, 486 transitions, 6558 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:14:12,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 514 transitions, 7869 flow [2024-06-14 12:14:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 514 transitions, 7802 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:13,846 INFO L231 Difference]: Finished difference. Result has 307 places, 489 transitions, 6642 flow [2024-06-14 12:14:13,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6491, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6642, PETRI_PLACES=307, PETRI_TRANSITIONS=489} [2024-06-14 12:14:13,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 12:14:13,847 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 489 transitions, 6642 flow [2024-06-14 12:14:13,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:13,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:13,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:14:13,847 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:13,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1024429372, now seen corresponding path program 2 times [2024-06-14 12:14:13,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:13,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753825786] [2024-06-14 12:14:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:14,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:14,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753825786] [2024-06-14 12:14:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753825786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:14,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:14,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:14,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508990879] [2024-06-14 12:14:14,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:14,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:14,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:14,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 489 transitions, 6642 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:14,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:14,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:14,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:16,210 INFO L124 PetriNetUnfolderBase]: 4420/7049 cut-off events. [2024-06-14 12:14:16,210 INFO L125 PetriNetUnfolderBase]: For 685754/685754 co-relation queries the response was YES. [2024-06-14 12:14:16,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58459 conditions, 7049 events. 4420/7049 cut-off events. For 685754/685754 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43989 event pairs, 881 based on Foata normal form. 1/7049 useless extension candidates. Maximal degree in co-relation 58312. Up to 6775 conditions per place. [2024-06-14 12:14:16,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 42 changer transitions 0/516 dead transitions. [2024-06-14 12:14:16,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 516 transitions, 7826 flow [2024-06-14 12:14:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:14:16,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:14:16,309 INFO L175 Difference]: Start difference. First operand has 307 places, 489 transitions, 6642 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:14:16,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 516 transitions, 7826 flow [2024-06-14 12:14:17,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 516 transitions, 7723 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:17,629 INFO L231 Difference]: Finished difference. Result has 310 places, 495 transitions, 6733 flow [2024-06-14 12:14:17,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6733, PETRI_PLACES=310, PETRI_TRANSITIONS=495} [2024-06-14 12:14:17,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-14 12:14:17,630 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 495 transitions, 6733 flow [2024-06-14 12:14:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:17,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:17,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:17,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:14:17,630 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:17,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash -914553220, now seen corresponding path program 1 times [2024-06-14 12:14:17,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:17,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133814961] [2024-06-14 12:14:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:17,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:18,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:18,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133814961] [2024-06-14 12:14:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133814961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:18,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:18,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941809730] [2024-06-14 12:14:18,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:18,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:18,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:18,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:18,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:18,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:18,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 495 transitions, 6733 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:18,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:18,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:18,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:19,838 INFO L124 PetriNetUnfolderBase]: 4472/7123 cut-off events. [2024-06-14 12:14:19,838 INFO L125 PetriNetUnfolderBase]: For 728175/728175 co-relation queries the response was YES. [2024-06-14 12:14:19,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59570 conditions, 7123 events. 4472/7123 cut-off events. For 728175/728175 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44469 event pairs, 872 based on Foata normal form. 4/7126 useless extension candidates. Maximal degree in co-relation 59422. Up to 6539 conditions per place. [2024-06-14 12:14:19,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 93 changer transitions 0/532 dead transitions. [2024-06-14 12:14:19,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 532 transitions, 8301 flow [2024-06-14 12:14:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:14:19,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:14:19,938 INFO L175 Difference]: Start difference. First operand has 310 places, 495 transitions, 6733 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:14:19,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 532 transitions, 8301 flow [2024-06-14 12:14:21,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 532 transitions, 8201 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:21,196 INFO L231 Difference]: Finished difference. Result has 314 places, 509 transitions, 7080 flow [2024-06-14 12:14:21,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7080, PETRI_PLACES=314, PETRI_TRANSITIONS=509} [2024-06-14 12:14:21,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 12:14:21,197 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 509 transitions, 7080 flow [2024-06-14 12:14:21,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:21,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:21,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:21,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:14:21,197 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:21,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:21,197 INFO L85 PathProgramCache]: Analyzing trace with hash -572171678, now seen corresponding path program 3 times [2024-06-14 12:14:21,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:21,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399799895] [2024-06-14 12:14:21,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:21,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399799895] [2024-06-14 12:14:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399799895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:21,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885701460] [2024-06-14 12:14:21,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:21,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:22,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:22,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 509 transitions, 7080 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:22,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:22,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:22,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:23,631 INFO L124 PetriNetUnfolderBase]: 4477/7132 cut-off events. [2024-06-14 12:14:23,632 INFO L125 PetriNetUnfolderBase]: For 737154/737154 co-relation queries the response was YES. [2024-06-14 12:14:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60762 conditions, 7132 events. 4477/7132 cut-off events. For 737154/737154 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44574 event pairs, 872 based on Foata normal form. 1/7132 useless extension candidates. Maximal degree in co-relation 60612. Up to 6854 conditions per place. [2024-06-14 12:14:23,722 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 40 changer transitions 0/528 dead transitions. [2024-06-14 12:14:23,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 528 transitions, 8231 flow [2024-06-14 12:14:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:14:23,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:14:23,723 INFO L175 Difference]: Start difference. First operand has 314 places, 509 transitions, 7080 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:14:23,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 528 transitions, 8231 flow [2024-06-14 12:14:25,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 528 transitions, 8082 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:25,401 INFO L231 Difference]: Finished difference. Result has 319 places, 512 transitions, 7080 flow [2024-06-14 12:14:25,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7080, PETRI_PLACES=319, PETRI_TRANSITIONS=512} [2024-06-14 12:14:25,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-14 12:14:25,401 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 512 transitions, 7080 flow [2024-06-14 12:14:25,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:25,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:25,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:25,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:14:25,402 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:25,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash -737184550, now seen corresponding path program 2 times [2024-06-14 12:14:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:25,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034535096] [2024-06-14 12:14:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:26,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:26,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034535096] [2024-06-14 12:14:26,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034535096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:26,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:26,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:26,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10411930] [2024-06-14 12:14:26,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:26,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:26,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:26,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:26,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:26,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:26,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 512 transitions, 7080 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:26,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:26,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:26,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:27,720 INFO L124 PetriNetUnfolderBase]: 4487/7146 cut-off events. [2024-06-14 12:14:27,721 INFO L125 PetriNetUnfolderBase]: For 757193/757193 co-relation queries the response was YES. [2024-06-14 12:14:27,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60914 conditions, 7146 events. 4487/7146 cut-off events. For 757193/757193 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 44672 event pairs, 870 based on Foata normal form. 2/7147 useless extension candidates. Maximal degree in co-relation 60762. Up to 6886 conditions per place. [2024-06-14 12:14:27,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 486 selfloop transitions, 42 changer transitions 0/532 dead transitions. [2024-06-14 12:14:27,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 532 transitions, 8273 flow [2024-06-14 12:14:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:14:27,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 12:14:27,828 INFO L175 Difference]: Start difference. First operand has 319 places, 512 transitions, 7080 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:14:27,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 532 transitions, 8273 flow [2024-06-14 12:14:29,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 532 transitions, 8147 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:29,974 INFO L231 Difference]: Finished difference. Result has 321 places, 516 transitions, 7125 flow [2024-06-14 12:14:29,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6954, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7125, PETRI_PLACES=321, PETRI_TRANSITIONS=516} [2024-06-14 12:14:29,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-14 12:14:29,975 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 516 transitions, 7125 flow [2024-06-14 12:14:29,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:29,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:29,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:29,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:14:29,975 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:29,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:29,975 INFO L85 PathProgramCache]: Analyzing trace with hash -737421700, now seen corresponding path program 3 times [2024-06-14 12:14:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:29,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293067234] [2024-06-14 12:14:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:30,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:30,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293067234] [2024-06-14 12:14:30,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293067234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:30,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:30,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:30,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065903675] [2024-06-14 12:14:30,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:30,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:30,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:30,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:30,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:30,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:30,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 516 transitions, 7125 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:30,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:30,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:30,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:32,276 INFO L124 PetriNetUnfolderBase]: 4497/7160 cut-off events. [2024-06-14 12:14:32,276 INFO L125 PetriNetUnfolderBase]: For 774470/774470 co-relation queries the response was YES. [2024-06-14 12:14:32,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61316 conditions, 7160 events. 4497/7160 cut-off events. For 774470/774470 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44732 event pairs, 871 based on Foata normal form. 2/7161 useless extension candidates. Maximal degree in co-relation 61163. Up to 6866 conditions per place. [2024-06-14 12:14:32,388 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 57 changer transitions 0/537 dead transitions. [2024-06-14 12:14:32,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 537 transitions, 8354 flow [2024-06-14 12:14:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:14:32,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:14:32,389 INFO L175 Difference]: Start difference. First operand has 321 places, 516 transitions, 7125 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:14:32,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 537 transitions, 8354 flow [2024-06-14 12:14:34,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 537 transitions, 8216 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:34,132 INFO L231 Difference]: Finished difference. Result has 324 places, 519 transitions, 7190 flow [2024-06-14 12:14:34,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7190, PETRI_PLACES=324, PETRI_TRANSITIONS=519} [2024-06-14 12:14:34,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-14 12:14:34,133 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 519 transitions, 7190 flow [2024-06-14 12:14:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:34,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:14:34,133 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:34,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:34,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1033003228, now seen corresponding path program 1 times [2024-06-14 12:14:34,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142196446] [2024-06-14 12:14:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:34,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:34,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142196446] [2024-06-14 12:14:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142196446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:34,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:34,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:34,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194156017] [2024-06-14 12:14:34,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:35,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:35,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 519 transitions, 7190 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:35,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:35,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:35,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:36,654 INFO L124 PetriNetUnfolderBase]: 4505/7170 cut-off events. [2024-06-14 12:14:36,654 INFO L125 PetriNetUnfolderBase]: For 790879/790879 co-relation queries the response was YES. [2024-06-14 12:14:36,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61624 conditions, 7170 events. 4505/7170 cut-off events. For 790879/790879 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44631 event pairs, 725 based on Foata normal form. 2/7171 useless extension candidates. Maximal degree in co-relation 61470. Up to 6846 conditions per place. [2024-06-14 12:14:36,759 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 500 selfloop transitions, 44 changer transitions 0/548 dead transitions. [2024-06-14 12:14:36,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 548 transitions, 8573 flow [2024-06-14 12:14:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:14:36,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 12:14:36,760 INFO L175 Difference]: Start difference. First operand has 324 places, 519 transitions, 7190 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:14:36,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 548 transitions, 8573 flow [2024-06-14 12:14:38,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 548 transitions, 8408 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:38,380 INFO L231 Difference]: Finished difference. Result has 326 places, 521 transitions, 7153 flow [2024-06-14 12:14:38,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7025, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7153, PETRI_PLACES=326, PETRI_TRANSITIONS=521} [2024-06-14 12:14:38,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-14 12:14:38,381 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 521 transitions, 7153 flow [2024-06-14 12:14:38,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:38,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:38,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:14:38,381 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:38,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1024432348, now seen corresponding path program 2 times [2024-06-14 12:14:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916648268] [2024-06-14 12:14:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916648268] [2024-06-14 12:14:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916648268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:39,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:39,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157498480] [2024-06-14 12:14:39,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:39,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:39,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:39,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:39,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 521 transitions, 7153 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:39,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:39,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:39,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:41,049 INFO L124 PetriNetUnfolderBase]: 4513/7186 cut-off events. [2024-06-14 12:14:41,049 INFO L125 PetriNetUnfolderBase]: For 805700/805700 co-relation queries the response was YES. [2024-06-14 12:14:41,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61810 conditions, 7186 events. 4513/7186 cut-off events. For 805700/805700 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44930 event pairs, 870 based on Foata normal form. 2/7187 useless extension candidates. Maximal degree in co-relation 61655. Up to 6903 conditions per place. [2024-06-14 12:14:41,160 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 500 selfloop transitions, 41 changer transitions 0/545 dead transitions. [2024-06-14 12:14:41,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 545 transitions, 8338 flow [2024-06-14 12:14:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:41,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:14:41,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:14:41,161 INFO L175 Difference]: Start difference. First operand has 326 places, 521 transitions, 7153 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:14:41,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 545 transitions, 8338 flow [2024-06-14 12:14:42,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 545 transitions, 8224 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:42,934 INFO L231 Difference]: Finished difference. Result has 328 places, 523 transitions, 7169 flow [2024-06-14 12:14:42,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7169, PETRI_PLACES=328, PETRI_TRANSITIONS=523} [2024-06-14 12:14:42,935 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-14 12:14:42,935 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 523 transitions, 7169 flow [2024-06-14 12:14:42,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:42,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:42,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:42,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:14:42,935 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:42,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -737545018, now seen corresponding path program 3 times [2024-06-14 12:14:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:42,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590080221] [2024-06-14 12:14:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:43,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:43,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590080221] [2024-06-14 12:14:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590080221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:43,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:43,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302175011] [2024-06-14 12:14:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:43,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:43,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:43,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:43,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:43,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:43,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 523 transitions, 7169 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:43,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:43,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:43,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:45,552 INFO L124 PetriNetUnfolderBase]: 4521/7198 cut-off events. [2024-06-14 12:14:45,552 INFO L125 PetriNetUnfolderBase]: For 822898/822898 co-relation queries the response was YES. [2024-06-14 12:14:45,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62023 conditions, 7198 events. 4521/7198 cut-off events. For 822898/822898 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45002 event pairs, 868 based on Foata normal form. 2/7199 useless extension candidates. Maximal degree in co-relation 61867. Up to 6915 conditions per place. [2024-06-14 12:14:45,655 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 499 selfloop transitions, 39 changer transitions 0/542 dead transitions. [2024-06-14 12:14:45,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 542 transitions, 8332 flow [2024-06-14 12:14:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:14:45,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:14:45,656 INFO L175 Difference]: Start difference. First operand has 328 places, 523 transitions, 7169 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:14:45,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 542 transitions, 8332 flow [2024-06-14 12:14:47,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 542 transitions, 8229 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:47,068 INFO L231 Difference]: Finished difference. Result has 330 places, 525 transitions, 7192 flow [2024-06-14 12:14:47,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7066, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7192, PETRI_PLACES=330, PETRI_TRANSITIONS=525} [2024-06-14 12:14:47,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-14 12:14:47,069 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 525 transitions, 7192 flow [2024-06-14 12:14:47,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:47,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:47,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:47,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:14:47,069 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:47,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1805112956, now seen corresponding path program 4 times [2024-06-14 12:14:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:47,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889508997] [2024-06-14 12:14:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:47,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889508997] [2024-06-14 12:14:47,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889508997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:47,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:47,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:47,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237247714] [2024-06-14 12:14:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:47,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:47,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:47,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:47,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 525 transitions, 7192 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:47,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:47,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:47,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:49,465 INFO L124 PetriNetUnfolderBase]: 4557/7250 cut-off events. [2024-06-14 12:14:49,465 INFO L125 PetriNetUnfolderBase]: For 858745/858747 co-relation queries the response was YES. [2024-06-14 12:14:49,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62858 conditions, 7250 events. 4557/7250 cut-off events. For 858745/858747 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45343 event pairs, 873 based on Foata normal form. 6/7255 useless extension candidates. Maximal degree in co-relation 62701. Up to 6384 conditions per place. [2024-06-14 12:14:49,557 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 443 selfloop transitions, 125 changer transitions 0/572 dead transitions. [2024-06-14 12:14:49,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 572 transitions, 9155 flow [2024-06-14 12:14:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:14:49,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:14:49,558 INFO L175 Difference]: Start difference. First operand has 330 places, 525 transitions, 7192 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:14:49,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 572 transitions, 9155 flow [2024-06-14 12:14:51,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 572 transitions, 9052 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:51,772 INFO L231 Difference]: Finished difference. Result has 334 places, 545 transitions, 7676 flow [2024-06-14 12:14:51,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7089, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7676, PETRI_PLACES=334, PETRI_TRANSITIONS=545} [2024-06-14 12:14:51,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 12:14:51,772 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 545 transitions, 7676 flow [2024-06-14 12:14:51,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:51,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:51,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:51,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:14:51,773 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:51,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash 474641970, now seen corresponding path program 5 times [2024-06-14 12:14:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330196509] [2024-06-14 12:14:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330196509] [2024-06-14 12:14:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330196509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:52,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:52,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:52,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809048222] [2024-06-14 12:14:52,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:52,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:52,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:52,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 545 transitions, 7676 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:52,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:52,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:52,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:54,159 INFO L124 PetriNetUnfolderBase]: 4609/7326 cut-off events. [2024-06-14 12:14:54,159 INFO L125 PetriNetUnfolderBase]: For 902321/902323 co-relation queries the response was YES. [2024-06-14 12:14:54,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65348 conditions, 7326 events. 4609/7326 cut-off events. For 902321/902323 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45845 event pairs, 877 based on Foata normal form. 6/7331 useless extension candidates. Maximal degree in co-relation 65189. Up to 6424 conditions per place. [2024-06-14 12:14:54,266 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 427 selfloop transitions, 149 changer transitions 0/580 dead transitions. [2024-06-14 12:14:54,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 580 transitions, 9646 flow [2024-06-14 12:14:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:14:54,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:14:54,267 INFO L175 Difference]: Start difference. First operand has 334 places, 545 transitions, 7676 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:14:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 580 transitions, 9646 flow [2024-06-14 12:14:56,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 580 transitions, 9450 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:56,717 INFO L231 Difference]: Finished difference. Result has 342 places, 555 transitions, 8091 flow [2024-06-14 12:14:56,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8091, PETRI_PLACES=342, PETRI_TRANSITIONS=555} [2024-06-14 12:14:56,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-14 12:14:56,718 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 555 transitions, 8091 flow [2024-06-14 12:14:56,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:56,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:56,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:56,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:14:56,719 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:56,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2135175590, now seen corresponding path program 6 times [2024-06-14 12:14:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:56,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261841169] [2024-06-14 12:14:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:56,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:57,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:57,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261841169] [2024-06-14 12:14:57,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261841169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:57,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:57,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:57,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428984442] [2024-06-14 12:14:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:57,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:57,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:57,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 555 transitions, 8091 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:57,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:57,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:57,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:59,078 INFO L124 PetriNetUnfolderBase]: 4597/7312 cut-off events. [2024-06-14 12:14:59,078 INFO L125 PetriNetUnfolderBase]: For 900303/900305 co-relation queries the response was YES. [2024-06-14 12:14:59,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65032 conditions, 7312 events. 4597/7312 cut-off events. For 900303/900305 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 45800 event pairs, 874 based on Foata normal form. 6/7317 useless extension candidates. Maximal degree in co-relation 64869. Up to 6416 conditions per place. [2024-06-14 12:14:59,184 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 418 selfloop transitions, 155 changer transitions 0/577 dead transitions. [2024-06-14 12:14:59,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 577 transitions, 9609 flow [2024-06-14 12:14:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:14:59,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 12:14:59,185 INFO L175 Difference]: Start difference. First operand has 342 places, 555 transitions, 8091 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:14:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 577 transitions, 9609 flow [2024-06-14 12:15:01,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 577 transitions, 9364 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:01,843 INFO L231 Difference]: Finished difference. Result has 346 places, 555 transitions, 8163 flow [2024-06-14 12:15:01,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8163, PETRI_PLACES=346, PETRI_TRANSITIONS=555} [2024-06-14 12:15:01,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-14 12:15:01,844 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 555 transitions, 8163 flow [2024-06-14 12:15:01,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:01,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:15:01,844 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:01,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:01,845 INFO L85 PathProgramCache]: Analyzing trace with hash 175190904, now seen corresponding path program 7 times [2024-06-14 12:15:01,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:01,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596506202] [2024-06-14 12:15:01,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:01,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:02,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596506202] [2024-06-14 12:15:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596506202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:02,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:02,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:02,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766941168] [2024-06-14 12:15:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:02,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:02,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:02,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:02,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 555 transitions, 8163 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:02,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:02,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:02,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:04,258 INFO L124 PetriNetUnfolderBase]: 4639/7376 cut-off events. [2024-06-14 12:15:04,258 INFO L125 PetriNetUnfolderBase]: For 930753/930755 co-relation queries the response was YES. [2024-06-14 12:15:04,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66283 conditions, 7376 events. 4639/7376 cut-off events. For 930753/930755 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 46268 event pairs, 865 based on Foata normal form. 4/7379 useless extension candidates. Maximal degree in co-relation 66119. Up to 6997 conditions per place. [2024-06-14 12:15:04,374 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 501 selfloop transitions, 84 changer transitions 0/589 dead transitions. [2024-06-14 12:15:04,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 589 transitions, 10201 flow [2024-06-14 12:15:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:04,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:15:04,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 12:15:04,375 INFO L175 Difference]: Start difference. First operand has 346 places, 555 transitions, 8163 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:15:04,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 589 transitions, 10201 flow [2024-06-14 12:15:06,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 589 transitions, 9876 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:06,769 INFO L231 Difference]: Finished difference. Result has 350 places, 572 transitions, 8468 flow [2024-06-14 12:15:06,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8468, PETRI_PLACES=350, PETRI_TRANSITIONS=572} [2024-06-14 12:15:06,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-14 12:15:06,769 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 572 transitions, 8468 flow [2024-06-14 12:15:06,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:06,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:06,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:15:06,770 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1144068308, now seen corresponding path program 8 times [2024-06-14 12:15:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:06,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050294400] [2024-06-14 12:15:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050294400] [2024-06-14 12:15:07,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050294400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:07,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:07,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403802162] [2024-06-14 12:15:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:07,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:07,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 572 transitions, 8468 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:07,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:07,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:07,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:09,167 INFO L124 PetriNetUnfolderBase]: 4633/7370 cut-off events. [2024-06-14 12:15:09,168 INFO L125 PetriNetUnfolderBase]: For 938745/938747 co-relation queries the response was YES. [2024-06-14 12:15:09,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66073 conditions, 7370 events. 4633/7370 cut-off events. For 938745/938747 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 46208 event pairs, 867 based on Foata normal form. 4/7373 useless extension candidates. Maximal degree in co-relation 65906. Up to 6992 conditions per place. [2024-06-14 12:15:09,282 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 79 changer transitions 0/591 dead transitions. [2024-06-14 12:15:09,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 591 transitions, 10248 flow [2024-06-14 12:15:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:09,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:15:09,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-14 12:15:09,283 INFO L175 Difference]: Start difference. First operand has 350 places, 572 transitions, 8468 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:15:09,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 591 transitions, 10248 flow [2024-06-14 12:15:12,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 591 transitions, 10075 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:12,303 INFO L231 Difference]: Finished difference. Result has 355 places, 574 transitions, 8566 flow [2024-06-14 12:15:12,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8325, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8566, PETRI_PLACES=355, PETRI_TRANSITIONS=574} [2024-06-14 12:15:12,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 12:15:12,304 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 574 transitions, 8566 flow [2024-06-14 12:15:12,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:12,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:12,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:12,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:15:12,304 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:12,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:12,304 INFO L85 PathProgramCache]: Analyzing trace with hash 618101462, now seen corresponding path program 9 times [2024-06-14 12:15:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:12,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235188669] [2024-06-14 12:15:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:12,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:12,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:12,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235188669] [2024-06-14 12:15:12,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235188669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:12,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:12,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:12,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775295699] [2024-06-14 12:15:12,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:13,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:13,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 574 transitions, 8566 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:13,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:13,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:13,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:14,723 INFO L124 PetriNetUnfolderBase]: 4627/7362 cut-off events. [2024-06-14 12:15:14,723 INFO L125 PetriNetUnfolderBase]: For 942537/942539 co-relation queries the response was YES. [2024-06-14 12:15:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65905 conditions, 7362 events. 4627/7362 cut-off events. For 942537/942539 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 46146 event pairs, 867 based on Foata normal form. 4/7365 useless extension candidates. Maximal degree in co-relation 65736. Up to 7065 conditions per place. [2024-06-14 12:15:14,841 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 538 selfloop transitions, 46 changer transitions 0/588 dead transitions. [2024-06-14 12:15:14,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 588 transitions, 10009 flow [2024-06-14 12:15:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:15:14,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:15:14,844 INFO L175 Difference]: Start difference. First operand has 355 places, 574 transitions, 8566 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:15:14,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 588 transitions, 10009 flow [2024-06-14 12:15:17,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 588 transitions, 9823 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:17,608 INFO L231 Difference]: Finished difference. Result has 359 places, 574 transitions, 8479 flow [2024-06-14 12:15:17,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8380, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8479, PETRI_PLACES=359, PETRI_TRANSITIONS=574} [2024-06-14 12:15:17,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-14 12:15:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 574 transitions, 8479 flow [2024-06-14 12:15:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:15:17,609 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:17,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 926923582, now seen corresponding path program 10 times [2024-06-14 12:15:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709115458] [2024-06-14 12:15:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:18,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:18,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709115458] [2024-06-14 12:15:18,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709115458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:18,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:18,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:18,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657750626] [2024-06-14 12:15:18,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:18,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:18,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:18,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:18,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:18,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:18,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 574 transitions, 8479 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:18,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:18,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:18,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:20,160 INFO L124 PetriNetUnfolderBase]: 4637/7380 cut-off events. [2024-06-14 12:15:20,161 INFO L125 PetriNetUnfolderBase]: For 959206/959208 co-relation queries the response was YES. [2024-06-14 12:15:20,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66061 conditions, 7380 events. 4637/7380 cut-off events. For 959206/959208 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 46346 event pairs, 869 based on Foata normal form. 4/7383 useless extension candidates. Maximal degree in co-relation 65891. Up to 7098 conditions per place. [2024-06-14 12:15:20,271 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 543 selfloop transitions, 42 changer transitions 0/589 dead transitions. [2024-06-14 12:15:20,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 589 transitions, 9805 flow [2024-06-14 12:15:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:15:20,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:15:20,272 INFO L175 Difference]: Start difference. First operand has 359 places, 574 transitions, 8479 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:15:20,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 589 transitions, 9805 flow [2024-06-14 12:15:23,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 589 transitions, 9672 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:23,112 INFO L231 Difference]: Finished difference. Result has 362 places, 578 transitions, 8552 flow [2024-06-14 12:15:23,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8356, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8552, PETRI_PLACES=362, PETRI_TRANSITIONS=578} [2024-06-14 12:15:23,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 12:15:23,113 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 578 transitions, 8552 flow [2024-06-14 12:15:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:23,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:23,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:15:23,113 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:23,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:23,113 INFO L85 PathProgramCache]: Analyzing trace with hash 406823014, now seen corresponding path program 4 times [2024-06-14 12:15:23,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:23,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531066715] [2024-06-14 12:15:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:23,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:23,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:23,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531066715] [2024-06-14 12:15:23,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531066715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:23,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:23,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:23,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622540240] [2024-06-14 12:15:23,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:23,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:23,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:24,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:24,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 578 transitions, 8552 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:24,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:24,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:24,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:25,780 INFO L124 PetriNetUnfolderBase]: 4610/7332 cut-off events. [2024-06-14 12:15:25,780 INFO L125 PetriNetUnfolderBase]: For 965407/965407 co-relation queries the response was YES. [2024-06-14 12:15:25,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65712 conditions, 7332 events. 4610/7332 cut-off events. For 965407/965407 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45912 event pairs, 870 based on Foata normal form. 1/7332 useless extension candidates. Maximal degree in co-relation 65541. Up to 7034 conditions per place. [2024-06-14 12:15:25,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 548 selfloop transitions, 37 changer transitions 0/589 dead transitions. [2024-06-14 12:15:25,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 589 transitions, 9752 flow [2024-06-14 12:15:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:15:25,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:15:25,884 INFO L175 Difference]: Start difference. First operand has 362 places, 578 transitions, 8552 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:15:25,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 589 transitions, 9752 flow [2024-06-14 12:15:28,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 589 transitions, 9600 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:28,857 INFO L231 Difference]: Finished difference. Result has 364 places, 578 transitions, 8480 flow [2024-06-14 12:15:28,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8400, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8480, PETRI_PLACES=364, PETRI_TRANSITIONS=578} [2024-06-14 12:15:28,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-14 12:15:28,857 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 578 transitions, 8480 flow [2024-06-14 12:15:28,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:28,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:28,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:28,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:15:28,858 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:28,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1332134812, now seen corresponding path program 11 times [2024-06-14 12:15:28,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:28,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50606586] [2024-06-14 12:15:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:28,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:29,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50606586] [2024-06-14 12:15:29,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50606586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:29,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:29,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:29,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27690997] [2024-06-14 12:15:29,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:29,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:29,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:29,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:29,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:29,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:29,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 578 transitions, 8480 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:29,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:29,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:29,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:31,362 INFO L124 PetriNetUnfolderBase]: 4604/7322 cut-off events. [2024-06-14 12:15:31,362 INFO L125 PetriNetUnfolderBase]: For 976526/976528 co-relation queries the response was YES. [2024-06-14 12:15:31,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65493 conditions, 7322 events. 4604/7322 cut-off events. For 976526/976528 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45871 event pairs, 861 based on Foata normal form. 4/7325 useless extension candidates. Maximal degree in co-relation 65321. Up to 7020 conditions per place. [2024-06-14 12:15:31,467 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 533 selfloop transitions, 54 changer transitions 0/591 dead transitions. [2024-06-14 12:15:31,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 591 transitions, 9926 flow [2024-06-14 12:15:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:15:31,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:15:31,467 INFO L175 Difference]: Start difference. First operand has 364 places, 578 transitions, 8480 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:15:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 591 transitions, 9926 flow [2024-06-14 12:15:34,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 591 transitions, 9742 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-14 12:15:34,159 INFO L231 Difference]: Finished difference. Result has 363 places, 578 transitions, 8410 flow [2024-06-14 12:15:34,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8296, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8410, PETRI_PLACES=363, PETRI_TRANSITIONS=578} [2024-06-14 12:15:34,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-14 12:15:34,160 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 578 transitions, 8410 flow [2024-06-14 12:15:34,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:34,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:34,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:34,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:15:34,160 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:34,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:34,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1326420892, now seen corresponding path program 12 times [2024-06-14 12:15:34,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:34,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43461865] [2024-06-14 12:15:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:34,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:34,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:34,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43461865] [2024-06-14 12:15:34,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43461865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:34,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:34,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:34,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678783601] [2024-06-14 12:15:34,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:34,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:34,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:34,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:34,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:34,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:34,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 578 transitions, 8410 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:34,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:34,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:34,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:36,709 INFO L124 PetriNetUnfolderBase]: 4598/7320 cut-off events. [2024-06-14 12:15:36,709 INFO L125 PetriNetUnfolderBase]: For 982727/982729 co-relation queries the response was YES. [2024-06-14 12:15:36,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65296 conditions, 7320 events. 4598/7320 cut-off events. For 982727/982729 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 45994 event pairs, 860 based on Foata normal form. 4/7323 useless extension candidates. Maximal degree in co-relation 65123. Up to 7036 conditions per place. [2024-06-14 12:15:36,804 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 542 selfloop transitions, 43 changer transitions 0/589 dead transitions. [2024-06-14 12:15:36,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 589 transitions, 9626 flow [2024-06-14 12:15:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:15:36,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:15:36,805 INFO L175 Difference]: Start difference. First operand has 363 places, 578 transitions, 8410 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:15:36,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 589 transitions, 9626 flow [2024-06-14 12:15:40,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 589 transitions, 9426 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:40,088 INFO L231 Difference]: Finished difference. Result has 365 places, 578 transitions, 8302 flow [2024-06-14 12:15:40,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8210, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8302, PETRI_PLACES=365, PETRI_TRANSITIONS=578} [2024-06-14 12:15:40,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-14 12:15:40,089 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 578 transitions, 8302 flow [2024-06-14 12:15:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:40,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:40,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:40,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:15:40,089 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:40,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash 406820038, now seen corresponding path program 4 times [2024-06-14 12:15:40,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:40,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171451546] [2024-06-14 12:15:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:40,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:40,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171451546] [2024-06-14 12:15:40,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171451546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:40,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:40,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041168493] [2024-06-14 12:15:40,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:40,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:40,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:40,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:15:40,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 578 transitions, 8302 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:40,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:40,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:15:40,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:42,953 INFO L124 PetriNetUnfolderBase]: 4593/7309 cut-off events. [2024-06-14 12:15:42,953 INFO L125 PetriNetUnfolderBase]: For 988142/988142 co-relation queries the response was YES. [2024-06-14 12:15:43,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65072 conditions, 7309 events. 4593/7309 cut-off events. For 988142/988142 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45795 event pairs, 867 based on Foata normal form. 2/7310 useless extension candidates. Maximal degree in co-relation 64898. Up to 7008 conditions per place. [2024-06-14 12:15:43,058 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 550 selfloop transitions, 36 changer transitions 0/590 dead transitions. [2024-06-14 12:15:43,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 590 transitions, 9506 flow [2024-06-14 12:15:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:15:43,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-14 12:15:43,059 INFO L175 Difference]: Start difference. First operand has 365 places, 578 transitions, 8302 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:15:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 590 transitions, 9506 flow [2024-06-14 12:15:46,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 590 transitions, 9360 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:15:46,392 INFO L231 Difference]: Finished difference. Result has 365 places, 578 transitions, 8233 flow [2024-06-14 12:15:46,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8156, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8233, PETRI_PLACES=365, PETRI_TRANSITIONS=578} [2024-06-14 12:15:46,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-14 12:15:46,393 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 578 transitions, 8233 flow [2024-06-14 12:15:46,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:46,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:46,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:46,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:15:46,393 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2041473758, now seen corresponding path program 1 times [2024-06-14 12:15:46,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:46,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002508180] [2024-06-14 12:15:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:46,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:47,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002508180] [2024-06-14 12:15:47,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002508180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:47,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:47,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:47,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108452283] [2024-06-14 12:15:47,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:47,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:47,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:47,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:15:47,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 578 transitions, 8233 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:47,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:47,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:15:47,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:49,068 INFO L124 PetriNetUnfolderBase]: 4461/7175 cut-off events. [2024-06-14 12:15:49,068 INFO L125 PetriNetUnfolderBase]: For 877242/877252 co-relation queries the response was YES. [2024-06-14 12:15:49,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62030 conditions, 7175 events. 4461/7175 cut-off events. For 877242/877252 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45732 event pairs, 828 based on Foata normal form. 2/7168 useless extension candidates. Maximal degree in co-relation 61855. Up to 6725 conditions per place. [2024-06-14 12:15:49,163 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 541 selfloop transitions, 33 changer transitions 0/604 dead transitions. [2024-06-14 12:15:49,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 604 transitions, 9813 flow [2024-06-14 12:15:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:15:49,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:15:49,164 INFO L175 Difference]: Start difference. First operand has 365 places, 578 transitions, 8233 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:15:49,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 604 transitions, 9813 flow [2024-06-14 12:15:52,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 604 transitions, 9722 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:52,225 INFO L231 Difference]: Finished difference. Result has 366 places, 582 transitions, 8377 flow [2024-06-14 12:15:52,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8142, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8377, PETRI_PLACES=366, PETRI_TRANSITIONS=582} [2024-06-14 12:15:52,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-14 12:15:52,226 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 582 transitions, 8377 flow [2024-06-14 12:15:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:52,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:52,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:15:52,226 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:52,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 356800182, now seen corresponding path program 2 times [2024-06-14 12:15:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876769364] [2024-06-14 12:15:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876769364] [2024-06-14 12:15:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876769364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:53,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13083305] [2024-06-14 12:15:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:53,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:15:53,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 582 transitions, 8377 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:53,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:53,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:15:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:54,954 INFO L124 PetriNetUnfolderBase]: 4468/7187 cut-off events. [2024-06-14 12:15:54,954 INFO L125 PetriNetUnfolderBase]: For 894997/895007 co-relation queries the response was YES. [2024-06-14 12:15:55,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62457 conditions, 7187 events. 4468/7187 cut-off events. For 894997/895007 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 45870 event pairs, 868 based on Foata normal form. 2/7180 useless extension candidates. Maximal degree in co-relation 62281. Up to 6773 conditions per place. [2024-06-14 12:15:55,049 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 542 selfloop transitions, 29 changer transitions 0/601 dead transitions. [2024-06-14 12:15:55,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 601 transitions, 9651 flow [2024-06-14 12:15:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:15:55,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:15:55,050 INFO L175 Difference]: Start difference. First operand has 366 places, 582 transitions, 8377 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:15:55,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 601 transitions, 9651 flow [2024-06-14 12:15:57,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 601 transitions, 9492 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:57,851 INFO L231 Difference]: Finished difference. Result has 370 places, 584 transitions, 8369 flow [2024-06-14 12:15:57,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8244, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8369, PETRI_PLACES=370, PETRI_TRANSITIONS=584} [2024-06-14 12:15:57,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-14 12:15:57,851 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 584 transitions, 8369 flow [2024-06-14 12:15:57,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:57,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:57,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:15:57,852 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:57,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:57,852 INFO L85 PathProgramCache]: Analyzing trace with hash 889837060, now seen corresponding path program 1 times [2024-06-14 12:15:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:57,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470614126] [2024-06-14 12:15:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:58,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:58,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470614126] [2024-06-14 12:15:58,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470614126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:58,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:58,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:58,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608127520] [2024-06-14 12:15:58,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:58,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:58,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:58,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:58,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:58,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:15:58,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 584 transitions, 8369 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:58,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:58,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:15:58,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:00,397 INFO L124 PetriNetUnfolderBase]: 4488/7216 cut-off events. [2024-06-14 12:16:00,397 INFO L125 PetriNetUnfolderBase]: For 918500/918510 co-relation queries the response was YES. [2024-06-14 12:16:00,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62726 conditions, 7216 events. 4488/7216 cut-off events. For 918500/918510 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46105 event pairs, 868 based on Foata normal form. 2/7209 useless extension candidates. Maximal degree in co-relation 62548. Up to 6676 conditions per place. [2024-06-14 12:16:00,697 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 517 selfloop transitions, 68 changer transitions 0/615 dead transitions. [2024-06-14 12:16:00,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 615 transitions, 10221 flow [2024-06-14 12:16:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:00,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:16:00,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:16:00,698 INFO L175 Difference]: Start difference. First operand has 370 places, 584 transitions, 8369 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:16:00,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 615 transitions, 10221 flow [2024-06-14 12:16:03,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 615 transitions, 10116 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:03,052 INFO L231 Difference]: Finished difference. Result has 373 places, 593 transitions, 8599 flow [2024-06-14 12:16:03,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8264, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8599, PETRI_PLACES=373, PETRI_TRANSITIONS=593} [2024-06-14 12:16:03,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-14 12:16:03,052 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 593 transitions, 8599 flow [2024-06-14 12:16:03,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:03,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:03,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:03,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:16:03,052 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:03,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash 359601466, now seen corresponding path program 2 times [2024-06-14 12:16:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392695858] [2024-06-14 12:16:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:03,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392695858] [2024-06-14 12:16:03,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392695858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:03,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:03,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:03,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031718411] [2024-06-14 12:16:03,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:03,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:03,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 593 transitions, 8599 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:03,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:03,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:03,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:05,689 INFO L124 PetriNetUnfolderBase]: 4493/7224 cut-off events. [2024-06-14 12:16:05,689 INFO L125 PetriNetUnfolderBase]: For 936617/936627 co-relation queries the response was YES. [2024-06-14 12:16:05,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63513 conditions, 7224 events. 4493/7224 cut-off events. For 936617/936627 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 46140 event pairs, 866 based on Foata normal form. 3/7218 useless extension candidates. Maximal degree in co-relation 63333. Up to 6753 conditions per place. [2024-06-14 12:16:05,808 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 524 selfloop transitions, 58 changer transitions 0/612 dead transitions. [2024-06-14 12:16:05,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 612 transitions, 9861 flow [2024-06-14 12:16:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:16:05,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 12:16:05,812 INFO L175 Difference]: Start difference. First operand has 373 places, 593 transitions, 8599 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:16:05,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 612 transitions, 9861 flow [2024-06-14 12:16:08,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 612 transitions, 9778 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:08,418 INFO L231 Difference]: Finished difference. Result has 378 places, 596 transitions, 8695 flow [2024-06-14 12:16:08,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8524, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8695, PETRI_PLACES=378, PETRI_TRANSITIONS=596} [2024-06-14 12:16:08,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 12:16:08,419 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 596 transitions, 8695 flow [2024-06-14 12:16:08,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:08,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:08,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:08,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:16:08,419 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:08,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2044330842, now seen corresponding path program 3 times [2024-06-14 12:16:08,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:08,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946783791] [2024-06-14 12:16:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:08,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:09,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:09,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946783791] [2024-06-14 12:16:09,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946783791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:09,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:09,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803659086] [2024-06-14 12:16:09,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:09,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:09,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 596 transitions, 8695 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:09,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:09,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:09,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:11,005 INFO L124 PetriNetUnfolderBase]: 4503/7240 cut-off events. [2024-06-14 12:16:11,005 INFO L125 PetriNetUnfolderBase]: For 946699/946709 co-relation queries the response was YES. [2024-06-14 12:16:11,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63856 conditions, 7240 events. 4503/7240 cut-off events. For 946699/946709 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46236 event pairs, 865 based on Foata normal form. 2/7233 useless extension candidates. Maximal degree in co-relation 63674. Up to 6746 conditions per place. [2024-06-14 12:16:11,122 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 520 selfloop transitions, 68 changer transitions 0/618 dead transitions. [2024-06-14 12:16:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 618 transitions, 10243 flow [2024-06-14 12:16:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:16:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 12:16:11,123 INFO L175 Difference]: Start difference. First operand has 378 places, 596 transitions, 8695 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:16:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 618 transitions, 10243 flow [2024-06-14 12:16:14,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 618 transitions, 10102 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:14,561 INFO L231 Difference]: Finished difference. Result has 380 places, 599 transitions, 8750 flow [2024-06-14 12:16:14,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8554, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8750, PETRI_PLACES=380, PETRI_TRANSITIONS=599} [2024-06-14 12:16:14,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-14 12:16:14,561 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 599 transitions, 8750 flow [2024-06-14 12:16:14,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:14,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:14,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:16:14,562 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:14,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2044330718, now seen corresponding path program 3 times [2024-06-14 12:16:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:14,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374645217] [2024-06-14 12:16:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:15,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:15,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374645217] [2024-06-14 12:16:15,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374645217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:15,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:15,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:15,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020634006] [2024-06-14 12:16:15,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:15,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:15,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 599 transitions, 8750 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:15,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:15,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:15,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:17,176 INFO L124 PetriNetUnfolderBase]: 4498/7233 cut-off events. [2024-06-14 12:16:17,176 INFO L125 PetriNetUnfolderBase]: For 950218/950228 co-relation queries the response was YES. [2024-06-14 12:16:17,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63685 conditions, 7233 events. 4498/7233 cut-off events. For 950218/950228 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46191 event pairs, 868 based on Foata normal form. 2/7226 useless extension candidates. Maximal degree in co-relation 63502. Up to 6828 conditions per place. [2024-06-14 12:16:17,291 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 558 selfloop transitions, 25 changer transitions 0/613 dead transitions. [2024-06-14 12:16:17,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 613 transitions, 9954 flow [2024-06-14 12:16:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:16:17,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:16:17,292 INFO L175 Difference]: Start difference. First operand has 380 places, 599 transitions, 8750 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:16:17,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 613 transitions, 9954 flow [2024-06-14 12:16:20,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 613 transitions, 9742 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:20,236 INFO L231 Difference]: Finished difference. Result has 382 places, 599 transitions, 8593 flow [2024-06-14 12:16:20,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8538, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8593, PETRI_PLACES=382, PETRI_TRANSITIONS=599} [2024-06-14 12:16:20,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-14 12:16:20,237 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 599 transitions, 8593 flow [2024-06-14 12:16:20,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:20,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:20,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:20,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:16:20,237 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:20,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:20,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2135345284, now seen corresponding path program 4 times [2024-06-14 12:16:20,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:20,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66489329] [2024-06-14 12:16:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:20,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:21,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66489329] [2024-06-14 12:16:21,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66489329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:21,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:21,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:21,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096996501] [2024-06-14 12:16:21,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:21,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:21,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:21,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:21,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 599 transitions, 8593 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:21,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:21,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:21,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:23,044 INFO L124 PetriNetUnfolderBase]: 4525/7272 cut-off events. [2024-06-14 12:16:23,044 INFO L125 PetriNetUnfolderBase]: For 977060/977070 co-relation queries the response was YES. [2024-06-14 12:16:23,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64107 conditions, 7272 events. 4525/7272 cut-off events. For 977060/977070 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46504 event pairs, 865 based on Foata normal form. 2/7265 useless extension candidates. Maximal degree in co-relation 63923. Up to 6758 conditions per place. [2024-06-14 12:16:23,149 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 70 changer transitions 0/631 dead transitions. [2024-06-14 12:16:23,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 631 transitions, 10205 flow [2024-06-14 12:16:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:23,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:16:23,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:16:23,150 INFO L175 Difference]: Start difference. First operand has 382 places, 599 transitions, 8593 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:16:23,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 631 transitions, 10205 flow [2024-06-14 12:16:26,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 631 transitions, 10136 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:26,478 INFO L231 Difference]: Finished difference. Result has 384 places, 605 transitions, 8786 flow [2024-06-14 12:16:26,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8524, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8786, PETRI_PLACES=384, PETRI_TRANSITIONS=605} [2024-06-14 12:16:26,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-14 12:16:26,478 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 605 transitions, 8786 flow [2024-06-14 12:16:26,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:26,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:26,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:26,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:16:26,478 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:26,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash 475065616, now seen corresponding path program 5 times [2024-06-14 12:16:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:26,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342087555] [2024-06-14 12:16:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:27,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:27,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342087555] [2024-06-14 12:16:27,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342087555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:27,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:27,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:27,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935440008] [2024-06-14 12:16:27,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:27,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:27,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:27,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:27,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:27,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:27,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 605 transitions, 8786 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:27,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:27,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:27,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:29,310 INFO L124 PetriNetUnfolderBase]: 4542/7295 cut-off events. [2024-06-14 12:16:29,310 INFO L125 PetriNetUnfolderBase]: For 999946/999956 co-relation queries the response was YES. [2024-06-14 12:16:29,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64584 conditions, 7295 events. 4542/7295 cut-off events. For 999946/999956 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 46576 event pairs, 866 based on Foata normal form. 3/7289 useless extension candidates. Maximal degree in co-relation 64399. Up to 6805 conditions per place. [2024-06-14 12:16:29,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 535 selfloop transitions, 63 changer transitions 0/628 dead transitions. [2024-06-14 12:16:29,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 628 transitions, 10374 flow [2024-06-14 12:16:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:16:29,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:16:29,416 INFO L175 Difference]: Start difference. First operand has 384 places, 605 transitions, 8786 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:16:29,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 628 transitions, 10374 flow [2024-06-14 12:16:32,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 628 transitions, 10256 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:32,498 INFO L231 Difference]: Finished difference. Result has 388 places, 608 transitions, 8867 flow [2024-06-14 12:16:32,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8668, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8867, PETRI_PLACES=388, PETRI_TRANSITIONS=608} [2024-06-14 12:16:32,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-14 12:16:32,499 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 608 transitions, 8867 flow [2024-06-14 12:16:32,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:32,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:32,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:16:32,499 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:32,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1891758608, now seen corresponding path program 6 times [2024-06-14 12:16:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:32,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210896856] [2024-06-14 12:16:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:33,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210896856] [2024-06-14 12:16:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210896856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:33,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902080044] [2024-06-14 12:16:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:33,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:33,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:33,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 608 transitions, 8867 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:33,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:33,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:33,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:35,623 INFO L124 PetriNetUnfolderBase]: 4555/7314 cut-off events. [2024-06-14 12:16:35,623 INFO L125 PetriNetUnfolderBase]: For 1016668/1016678 co-relation queries the response was YES. [2024-06-14 12:16:35,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65040 conditions, 7314 events. 4555/7314 cut-off events. For 1016668/1016678 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46705 event pairs, 870 based on Foata normal form. 3/7308 useless extension candidates. Maximal degree in co-relation 64853. Up to 6903 conditions per place. [2024-06-14 12:16:35,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 562 selfloop transitions, 34 changer transitions 0/626 dead transitions. [2024-06-14 12:16:35,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 626 transitions, 10169 flow [2024-06-14 12:16:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:16:35,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:16:35,738 INFO L175 Difference]: Start difference. First operand has 388 places, 608 transitions, 8867 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:16:35,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 626 transitions, 10169 flow [2024-06-14 12:16:39,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 626 transitions, 9999 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:39,115 INFO L231 Difference]: Finished difference. Result has 390 places, 611 transitions, 8844 flow [2024-06-14 12:16:39,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8697, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8844, PETRI_PLACES=390, PETRI_TRANSITIONS=611} [2024-06-14 12:16:39,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 12:16:39,115 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 611 transitions, 8844 flow [2024-06-14 12:16:39,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:39,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:39,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:16:39,116 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:39,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1137388552, now seen corresponding path program 7 times [2024-06-14 12:16:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:39,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101673674] [2024-06-14 12:16:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:40,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:40,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101673674] [2024-06-14 12:16:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101673674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:40,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:40,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224807581] [2024-06-14 12:16:40,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:40,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:40,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:16:40,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 611 transitions, 8844 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:40,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:40,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:16:40,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:41,972 INFO L124 PetriNetUnfolderBase]: 4545/7299 cut-off events. [2024-06-14 12:16:41,972 INFO L125 PetriNetUnfolderBase]: For 1012753/1012763 co-relation queries the response was YES. [2024-06-14 12:16:42,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64518 conditions, 7299 events. 4545/7299 cut-off events. For 1012753/1012763 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46610 event pairs, 867 based on Foata normal form. 3/7293 useless extension candidates. Maximal degree in co-relation 64330. Up to 6896 conditions per place. [2024-06-14 12:16:42,088 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 568 selfloop transitions, 27 changer transitions 0/625 dead transitions. [2024-06-14 12:16:42,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 625 transitions, 10074 flow [2024-06-14 12:16:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:16:42,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:16:42,089 INFO L175 Difference]: Start difference. First operand has 390 places, 611 transitions, 8844 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:16:42,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 625 transitions, 10074 flow [2024-06-14 12:16:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 625 transitions, 9933 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:45,333 INFO L231 Difference]: Finished difference. Result has 392 places, 611 transitions, 8764 flow [2024-06-14 12:16:45,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8764, PETRI_PLACES=392, PETRI_TRANSITIONS=611} [2024-06-14 12:16:45,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-14 12:16:45,333 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 611 transitions, 8764 flow [2024-06-14 12:16:45,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:45,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:45,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:45,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:16:45,333 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:45,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1340720572, now seen corresponding path program 1 times [2024-06-14 12:16:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:45,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572366166] [2024-06-14 12:16:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:46,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:46,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572366166] [2024-06-14 12:16:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572366166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:46,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601195477] [2024-06-14 12:16:46,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:46,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:46,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 611 transitions, 8764 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:46,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:46,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:48,075 INFO L124 PetriNetUnfolderBase]: 4700/7459 cut-off events. [2024-06-14 12:16:48,075 INFO L125 PetriNetUnfolderBase]: For 1155318/1155318 co-relation queries the response was YES. [2024-06-14 12:16:48,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67834 conditions, 7459 events. 4700/7459 cut-off events. For 1155318/1155318 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 46749 event pairs, 930 based on Foata normal form. 1/7459 useless extension candidates. Maximal degree in co-relation 67645. Up to 7219 conditions per place. [2024-06-14 12:16:48,187 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 601 selfloop transitions, 23 changer transitions 0/628 dead transitions. [2024-06-14 12:16:48,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 628 transitions, 10165 flow [2024-06-14 12:16:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:16:48,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:16:48,188 INFO L175 Difference]: Start difference. First operand has 392 places, 611 transitions, 8764 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:16:48,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 628 transitions, 10165 flow [2024-06-14 12:16:52,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 628 transitions, 10066 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:52,091 INFO L231 Difference]: Finished difference. Result has 392 places, 617 transitions, 8856 flow [2024-06-14 12:16:52,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8671, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8856, PETRI_PLACES=392, PETRI_TRANSITIONS=617} [2024-06-14 12:16:52,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-14 12:16:52,092 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 617 transitions, 8856 flow [2024-06-14 12:16:52,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:52,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:52,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:52,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:16:52,092 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:52,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:52,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1869669048, now seen corresponding path program 1 times [2024-06-14 12:16:52,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:52,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806154436] [2024-06-14 12:16:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:53,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:53,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806154436] [2024-06-14 12:16:53,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806154436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:53,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:53,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:53,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035244310] [2024-06-14 12:16:53,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:53,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:53,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:53,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:16:53,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 617 transitions, 8856 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:53,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:53,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:16:53,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:55,071 INFO L124 PetriNetUnfolderBase]: 4710/7475 cut-off events. [2024-06-14 12:16:55,071 INFO L125 PetriNetUnfolderBase]: For 1180524/1180524 co-relation queries the response was YES. [2024-06-14 12:16:55,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68143 conditions, 7475 events. 4710/7475 cut-off events. For 1180524/1180524 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 46872 event pairs, 858 based on Foata normal form. 2/7476 useless extension candidates. Maximal degree in co-relation 67953. Up to 7078 conditions per place. [2024-06-14 12:16:55,191 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 577 selfloop transitions, 70 changer transitions 0/651 dead transitions. [2024-06-14 12:16:55,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 651 transitions, 10682 flow [2024-06-14 12:16:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:16:55,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:16:55,192 INFO L175 Difference]: Start difference. First operand has 392 places, 617 transitions, 8856 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:16:55,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 651 transitions, 10682 flow [2024-06-14 12:16:59,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 651 transitions, 10572 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:59,160 INFO L231 Difference]: Finished difference. Result has 395 places, 624 transitions, 9071 flow [2024-06-14 12:16:59,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9071, PETRI_PLACES=395, PETRI_TRANSITIONS=624} [2024-06-14 12:16:59,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-14 12:16:59,161 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 624 transitions, 9071 flow [2024-06-14 12:16:59,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:59,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:59,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:59,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:16:59,161 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:59,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1692537528, now seen corresponding path program 2 times [2024-06-14 12:16:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286448334] [2024-06-14 12:16:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:00,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:00,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286448334] [2024-06-14 12:17:00,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286448334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:00,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:00,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:00,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604434371] [2024-06-14 12:17:00,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:00,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:00,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:00,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:00,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:00,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:00,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 624 transitions, 9071 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:00,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:00,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:00,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:02,048 INFO L124 PetriNetUnfolderBase]: 4728/7502 cut-off events. [2024-06-14 12:17:02,048 INFO L125 PetriNetUnfolderBase]: For 1207545/1207545 co-relation queries the response was YES. [2024-06-14 12:17:02,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69285 conditions, 7502 events. 4728/7502 cut-off events. For 1207545/1207545 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 47044 event pairs, 858 based on Foata normal form. 1/7502 useless extension candidates. Maximal degree in co-relation 69094. Up to 7163 conditions per place. [2024-06-14 12:17:02,166 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 588 selfloop transitions, 64 changer transitions 0/656 dead transitions. [2024-06-14 12:17:02,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 656 transitions, 10892 flow [2024-06-14 12:17:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:17:02,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:17:02,167 INFO L175 Difference]: Start difference. First operand has 395 places, 624 transitions, 9071 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:17:02,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 656 transitions, 10892 flow [2024-06-14 12:17:05,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 656 transitions, 10677 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:05,995 INFO L231 Difference]: Finished difference. Result has 400 places, 633 transitions, 9213 flow [2024-06-14 12:17:05,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8884, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9213, PETRI_PLACES=400, PETRI_TRANSITIONS=633} [2024-06-14 12:17:05,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 12:17:05,995 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 633 transitions, 9213 flow [2024-06-14 12:17:05,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:05,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:05,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:05,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:17:05,995 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:05,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:05,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1692300378, now seen corresponding path program 3 times [2024-06-14 12:17:05,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:05,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095943364] [2024-06-14 12:17:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:06,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:06,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095943364] [2024-06-14 12:17:06,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095943364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:06,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:06,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:06,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888069286] [2024-06-14 12:17:06,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:06,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:06,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:07,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:07,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 633 transitions, 9213 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:07,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:07,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:07,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:09,052 INFO L124 PetriNetUnfolderBase]: 4770/7568 cut-off events. [2024-06-14 12:17:09,052 INFO L125 PetriNetUnfolderBase]: For 1226237/1226237 co-relation queries the response was YES. [2024-06-14 12:17:09,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69994 conditions, 7568 events. 4770/7568 cut-off events. For 1226237/1226237 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 47535 event pairs, 865 based on Foata normal form. 1/7568 useless extension candidates. Maximal degree in co-relation 69801. Up to 7212 conditions per place. [2024-06-14 12:17:09,189 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 597 selfloop transitions, 73 changer transitions 0/674 dead transitions. [2024-06-14 12:17:09,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 674 transitions, 10958 flow [2024-06-14 12:17:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:17:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:17:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 12:17:09,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-14 12:17:09,190 INFO L175 Difference]: Start difference. First operand has 400 places, 633 transitions, 9213 flow. Second operand 10 states and 167 transitions. [2024-06-14 12:17:09,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 674 transitions, 10958 flow [2024-06-14 12:17:13,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 674 transitions, 10759 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:13,633 INFO L231 Difference]: Finished difference. Result has 410 places, 655 transitions, 9575 flow [2024-06-14 12:17:13,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9051, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9575, PETRI_PLACES=410, PETRI_TRANSITIONS=655} [2024-06-14 12:17:13,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 12:17:13,634 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 655 transitions, 9575 flow [2024-06-14 12:17:13,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:13,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:13,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:13,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:17:13,634 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:13,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:13,634 INFO L85 PathProgramCache]: Analyzing trace with hash 585171473, now seen corresponding path program 1 times [2024-06-14 12:17:13,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:13,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847039775] [2024-06-14 12:17:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:13,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847039775] [2024-06-14 12:17:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847039775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:14,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:14,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011359799] [2024-06-14 12:17:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:14,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:14,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:14,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 655 transitions, 9575 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:14,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:14,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:14,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:16,512 INFO L124 PetriNetUnfolderBase]: 4780/7582 cut-off events. [2024-06-14 12:17:16,512 INFO L125 PetriNetUnfolderBase]: For 1252280/1252280 co-relation queries the response was YES. [2024-06-14 12:17:16,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70510 conditions, 7582 events. 4780/7582 cut-off events. For 1252280/1252280 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 47576 event pairs, 859 based on Foata normal form. 2/7583 useless extension candidates. Maximal degree in co-relation 70311. Up to 6952 conditions per place. [2024-06-14 12:17:16,646 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 540 selfloop transitions, 138 changer transitions 0/682 dead transitions. [2024-06-14 12:17:16,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 682 transitions, 11132 flow [2024-06-14 12:17:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:17:16,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:17:16,647 INFO L175 Difference]: Start difference. First operand has 410 places, 655 transitions, 9575 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:17:16,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 682 transitions, 11132 flow [2024-06-14 12:17:20,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 682 transitions, 11021 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 12:17:20,936 INFO L231 Difference]: Finished difference. Result has 417 places, 659 transitions, 9897 flow [2024-06-14 12:17:20,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9464, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9897, PETRI_PLACES=417, PETRI_TRANSITIONS=659} [2024-06-14 12:17:20,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 12:17:20,937 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 659 transitions, 9897 flow [2024-06-14 12:17:20,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:20,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:20,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:20,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:17:20,937 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:20,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1713617418, now seen corresponding path program 1 times [2024-06-14 12:17:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:20,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948707753] [2024-06-14 12:17:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:20,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:21,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:21,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948707753] [2024-06-14 12:17:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948707753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:21,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:21,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:17:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085364634] [2024-06-14 12:17:21,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:17:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:21,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:17:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:17:21,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:21,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 659 transitions, 9897 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:21,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:21,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:21,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:23,683 INFO L124 PetriNetUnfolderBase]: 4790/7600 cut-off events. [2024-06-14 12:17:23,683 INFO L125 PetriNetUnfolderBase]: For 1279789/1279789 co-relation queries the response was YES. [2024-06-14 12:17:23,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71902 conditions, 7600 events. 4790/7600 cut-off events. For 1279789/1279789 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47685 event pairs, 863 based on Foata normal form. 2/7601 useless extension candidates. Maximal degree in co-relation 71701. Up to 6948 conditions per place. [2024-06-14 12:17:23,826 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 552 selfloop transitions, 131 changer transitions 0/687 dead transitions. [2024-06-14 12:17:23,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 687 transitions, 11695 flow [2024-06-14 12:17:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:17:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:17:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:17:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-14 12:17:23,827 INFO L175 Difference]: Start difference. First operand has 417 places, 659 transitions, 9897 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:17:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 687 transitions, 11695 flow [2024-06-14 12:17:28,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 687 transitions, 11318 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:28,425 INFO L231 Difference]: Finished difference. Result has 418 places, 662 transitions, 9858 flow [2024-06-14 12:17:28,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9520, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9858, PETRI_PLACES=418, PETRI_TRANSITIONS=662} [2024-06-14 12:17:28,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 12:17:28,426 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 662 transitions, 9858 flow [2024-06-14 12:17:28,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:28,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:28,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:28,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:17:28,426 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:28,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1749830093, now seen corresponding path program 1 times [2024-06-14 12:17:28,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:28,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959469366] [2024-06-14 12:17:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:28,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959469366] [2024-06-14 12:17:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959469366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:29,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:29,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954232075] [2024-06-14 12:17:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:29,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:29,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:29,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:29,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 662 transitions, 9858 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:29,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:29,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:29,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:31,325 INFO L124 PetriNetUnfolderBase]: 4894/7732 cut-off events. [2024-06-14 12:17:31,325 INFO L125 PetriNetUnfolderBase]: For 1410131/1410131 co-relation queries the response was YES. [2024-06-14 12:17:31,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74499 conditions, 7732 events. 4894/7732 cut-off events. For 1410131/1410131 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 48327 event pairs, 864 based on Foata normal form. 8/7739 useless extension candidates. Maximal degree in co-relation 74297. Up to 6945 conditions per place. [2024-06-14 12:17:31,458 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 583 selfloop transitions, 115 changer transitions 0/702 dead transitions. [2024-06-14 12:17:31,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 702 transitions, 11941 flow [2024-06-14 12:17:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:17:31,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:17:31,459 INFO L175 Difference]: Start difference. First operand has 418 places, 662 transitions, 9858 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:17:31,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 702 transitions, 11941 flow [2024-06-14 12:17:36,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 702 transitions, 11648 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:36,706 INFO L231 Difference]: Finished difference. Result has 422 places, 675 transitions, 10104 flow [2024-06-14 12:17:36,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9565, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10104, PETRI_PLACES=422, PETRI_TRANSITIONS=675} [2024-06-14 12:17:36,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-14 12:17:36,707 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 675 transitions, 10104 flow [2024-06-14 12:17:36,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:36,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:36,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:17:36,707 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:36,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1749830310, now seen corresponding path program 2 times [2024-06-14 12:17:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685283908] [2024-06-14 12:17:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:37,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685283908] [2024-06-14 12:17:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685283908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:37,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775932213] [2024-06-14 12:17:37,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:37,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:37,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:37,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:37,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:37,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 675 transitions, 10104 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:37,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:37,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:39,680 INFO L124 PetriNetUnfolderBase]: 4904/7748 cut-off events. [2024-06-14 12:17:39,680 INFO L125 PetriNetUnfolderBase]: For 1393885/1393885 co-relation queries the response was YES. [2024-06-14 12:17:39,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75727 conditions, 7748 events. 4904/7748 cut-off events. For 1393885/1393885 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 48469 event pairs, 865 based on Foata normal form. 2/7749 useless extension candidates. Maximal degree in co-relation 75523. Up to 7102 conditions per place. [2024-06-14 12:17:39,821 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 584 selfloop transitions, 114 changer transitions 0/702 dead transitions. [2024-06-14 12:17:39,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 702 transitions, 11943 flow [2024-06-14 12:17:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:17:39,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:17:39,822 INFO L175 Difference]: Start difference. First operand has 422 places, 675 transitions, 10104 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:17:39,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 702 transitions, 11943 flow [2024-06-14 12:17:44,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 702 transitions, 11724 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-14 12:17:44,354 INFO L231 Difference]: Finished difference. Result has 427 places, 678 transitions, 10187 flow [2024-06-14 12:17:44,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9891, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10187, PETRI_PLACES=427, PETRI_TRANSITIONS=678} [2024-06-14 12:17:44,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 12:17:44,354 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 678 transitions, 10187 flow [2024-06-14 12:17:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:44,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:44,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:44,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:17:44,355 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:44,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1378002980, now seen corresponding path program 4 times [2024-06-14 12:17:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017420280] [2024-06-14 12:17:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:44,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:45,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:45,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017420280] [2024-06-14 12:17:45,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017420280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:45,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:45,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767804120] [2024-06-14 12:17:45,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:45,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:45,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:45,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 678 transitions, 10187 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:45,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:45,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:45,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:47,389 INFO L124 PetriNetUnfolderBase]: 4919/7769 cut-off events. [2024-06-14 12:17:47,389 INFO L125 PetriNetUnfolderBase]: For 1402773/1402773 co-relation queries the response was YES. [2024-06-14 12:17:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75598 conditions, 7769 events. 4919/7769 cut-off events. For 1402773/1402773 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 48604 event pairs, 861 based on Foata normal form. 1/7769 useless extension candidates. Maximal degree in co-relation 75392. Up to 7415 conditions per place. [2024-06-14 12:17:47,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 619 selfloop transitions, 80 changer transitions 0/703 dead transitions. [2024-06-14 12:17:47,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 703 transitions, 11784 flow [2024-06-14 12:17:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:17:47,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:17:47,529 INFO L175 Difference]: Start difference. First operand has 427 places, 678 transitions, 10187 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:17:47,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 703 transitions, 11784 flow [2024-06-14 12:17:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 703 transitions, 11596 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:51,437 INFO L231 Difference]: Finished difference. Result has 430 places, 687 transitions, 10327 flow [2024-06-14 12:17:51,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9999, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10327, PETRI_PLACES=430, PETRI_TRANSITIONS=687} [2024-06-14 12:17:51,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 12:17:51,438 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 687 transitions, 10327 flow [2024-06-14 12:17:51,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:51,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:51,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:51,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:17:51,439 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:51,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1377882607, now seen corresponding path program 2 times [2024-06-14 12:17:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876537064] [2024-06-14 12:17:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:52,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876537064] [2024-06-14 12:17:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876537064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:52,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:52,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521632992] [2024-06-14 12:17:52,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:52,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:17:52,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 687 transitions, 10327 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:52,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:52,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:17:52,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:54,309 INFO L124 PetriNetUnfolderBase]: 4971/7839 cut-off events. [2024-06-14 12:17:54,309 INFO L125 PetriNetUnfolderBase]: For 1486925/1486925 co-relation queries the response was YES. [2024-06-14 12:17:54,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77166 conditions, 7839 events. 4971/7839 cut-off events. For 1486925/1486925 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 49025 event pairs, 866 based on Foata normal form. 4/7842 useless extension candidates. Maximal degree in co-relation 76959. Up to 7501 conditions per place. [2024-06-14 12:17:54,455 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 654 selfloop transitions, 58 changer transitions 0/716 dead transitions. [2024-06-14 12:17:54,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 716 transitions, 12305 flow [2024-06-14 12:17:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:17:54,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-14 12:17:54,456 INFO L175 Difference]: Start difference. First operand has 430 places, 687 transitions, 10327 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:17:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 716 transitions, 12305 flow [2024-06-14 12:17:59,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 716 transitions, 12074 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:59,282 INFO L231 Difference]: Finished difference. Result has 433 places, 695 transitions, 10428 flow [2024-06-14 12:17:59,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10096, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10428, PETRI_PLACES=433, PETRI_TRANSITIONS=695} [2024-06-14 12:17:59,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-14 12:17:59,283 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 695 transitions, 10428 flow [2024-06-14 12:17:59,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:59,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:59,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:17:59,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:17:59,283 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:59,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:59,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1385234257, now seen corresponding path program 3 times [2024-06-14 12:17:59,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:59,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128221905] [2024-06-14 12:17:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:59,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:00,023 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 12:18:00,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:00,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128221905] [2024-06-14 12:18:00,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128221905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:00,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:00,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:00,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598502913] [2024-06-14 12:18:00,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:00,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 695 transitions, 10428 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:00,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:00,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:00,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:02,200 INFO L124 PetriNetUnfolderBase]: 4991/7867 cut-off events. [2024-06-14 12:18:02,201 INFO L125 PetriNetUnfolderBase]: For 1514874/1514874 co-relation queries the response was YES. [2024-06-14 12:18:02,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77790 conditions, 7867 events. 4991/7867 cut-off events. For 1514874/1514874 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 49186 event pairs, 870 based on Foata normal form. 4/7870 useless extension candidates. Maximal degree in co-relation 77582. Up to 7479 conditions per place. [2024-06-14 12:18:02,338 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 642 selfloop transitions, 75 changer transitions 0/721 dead transitions. [2024-06-14 12:18:02,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 721 transitions, 12345 flow [2024-06-14 12:18:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:18:02,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:18:02,339 INFO L175 Difference]: Start difference. First operand has 433 places, 695 transitions, 10428 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:18:02,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 721 transitions, 12345 flow [2024-06-14 12:18:06,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 721 transitions, 12174 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:06,977 INFO L231 Difference]: Finished difference. Result has 438 places, 698 transitions, 10519 flow [2024-06-14 12:18:06,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10257, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10519, PETRI_PLACES=438, PETRI_TRANSITIONS=698} [2024-06-14 12:18:06,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-14 12:18:06,978 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 698 transitions, 10519 flow [2024-06-14 12:18:06,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:06,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:06,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:18:06,978 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:06,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1385234474, now seen corresponding path program 3 times [2024-06-14 12:18:06,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:06,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385878819] [2024-06-14 12:18:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:06,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:07,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385878819] [2024-06-14 12:18:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385878819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:07,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922148093] [2024-06-14 12:18:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:07,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:07,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 698 transitions, 10519 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:07,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:07,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:07,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:10,022 INFO L124 PetriNetUnfolderBase]: 5001/7889 cut-off events. [2024-06-14 12:18:10,022 INFO L125 PetriNetUnfolderBase]: For 1516531/1516531 co-relation queries the response was YES. [2024-06-14 12:18:10,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77995 conditions, 7889 events. 5001/7889 cut-off events. For 1516531/1516531 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 49393 event pairs, 868 based on Foata normal form. 2/7890 useless extension candidates. Maximal degree in co-relation 77785. Up to 7556 conditions per place. [2024-06-14 12:18:10,172 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 653 selfloop transitions, 64 changer transitions 0/721 dead transitions. [2024-06-14 12:18:10,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 721 transitions, 12137 flow [2024-06-14 12:18:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:18:10,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:18:10,173 INFO L175 Difference]: Start difference. First operand has 438 places, 698 transitions, 10519 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:18:10,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 721 transitions, 12137 flow [2024-06-14 12:18:14,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 721 transitions, 11907 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:14,646 INFO L231 Difference]: Finished difference. Result has 440 places, 701 transitions, 10494 flow [2024-06-14 12:18:14,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10289, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10494, PETRI_PLACES=440, PETRI_TRANSITIONS=701} [2024-06-14 12:18:14,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-14 12:18:14,647 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 701 transitions, 10494 flow [2024-06-14 12:18:14,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:14,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:14,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:14,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:18:14,647 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:14,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:14,648 INFO L85 PathProgramCache]: Analyzing trace with hash -546368836, now seen corresponding path program 4 times [2024-06-14 12:18:14,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:14,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203050384] [2024-06-14 12:18:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:15,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:15,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203050384] [2024-06-14 12:18:15,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203050384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:15,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:15,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313001205] [2024-06-14 12:18:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:15,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:15,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:15,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 701 transitions, 10494 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:15,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:15,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:15,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:17,782 INFO L124 PetriNetUnfolderBase]: 5011/7899 cut-off events. [2024-06-14 12:18:17,782 INFO L125 PetriNetUnfolderBase]: For 1535054/1535054 co-relation queries the response was YES. [2024-06-14 12:18:17,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77982 conditions, 7899 events. 5011/7899 cut-off events. For 1535054/1535054 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 49417 event pairs, 867 based on Foata normal form. 2/7900 useless extension candidates. Maximal degree in co-relation 77771. Up to 7604 conditions per place. [2024-06-14 12:18:17,915 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 669 selfloop transitions, 49 changer transitions 0/722 dead transitions. [2024-06-14 12:18:17,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 722 transitions, 12089 flow [2024-06-14 12:18:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:18:17,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:18:17,916 INFO L175 Difference]: Start difference. First operand has 440 places, 701 transitions, 10494 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:18:17,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 722 transitions, 12089 flow [2024-06-14 12:18:22,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 722 transitions, 11935 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:22,796 INFO L231 Difference]: Finished difference. Result has 442 places, 704 transitions, 10521 flow [2024-06-14 12:18:22,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10340, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10521, PETRI_PLACES=442, PETRI_TRANSITIONS=704} [2024-06-14 12:18:22,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 12:18:22,796 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 704 transitions, 10521 flow [2024-06-14 12:18:22,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:22,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:22,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:18:22,797 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:22,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash 918468309, now seen corresponding path program 4 times [2024-06-14 12:18:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:22,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601951314] [2024-06-14 12:18:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:23,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:23,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601951314] [2024-06-14 12:18:23,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601951314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:23,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:23,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:23,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042467470] [2024-06-14 12:18:23,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:23,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:23,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:23,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:23,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:23,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 704 transitions, 10521 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:23,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:23,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:23,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:25,801 INFO L124 PetriNetUnfolderBase]: 5036/7935 cut-off events. [2024-06-14 12:18:25,801 INFO L125 PetriNetUnfolderBase]: For 1575071/1575073 co-relation queries the response was YES. [2024-06-14 12:18:25,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78470 conditions, 7935 events. 5036/7935 cut-off events. For 1575071/1575073 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 49665 event pairs, 884 based on Foata normal form. 6/7940 useless extension candidates. Maximal degree in co-relation 78258. Up to 7623 conditions per place. [2024-06-14 12:18:25,953 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 667 selfloop transitions, 55 changer transitions 0/726 dead transitions. [2024-06-14 12:18:25,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 726 transitions, 12128 flow [2024-06-14 12:18:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:18:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:18:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:18:25,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-14 12:18:25,954 INFO L175 Difference]: Start difference. First operand has 442 places, 704 transitions, 10521 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:18:25,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 726 transitions, 12128 flow [2024-06-14 12:18:30,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 726 transitions, 11998 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:30,261 INFO L231 Difference]: Finished difference. Result has 445 places, 710 transitions, 10610 flow [2024-06-14 12:18:30,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10391, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10610, PETRI_PLACES=445, PETRI_TRANSITIONS=710} [2024-06-14 12:18:30,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 12:18:30,261 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 710 transitions, 10610 flow [2024-06-14 12:18:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:30,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:30,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:30,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:18:30,262 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:30,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1325030954, now seen corresponding path program 5 times [2024-06-14 12:18:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:30,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734970058] [2024-06-14 12:18:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:31,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:31,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734970058] [2024-06-14 12:18:31,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734970058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:31,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:31,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:31,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386599042] [2024-06-14 12:18:31,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:31,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:31,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:31,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:31,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:31,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:31,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 710 transitions, 10610 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:31,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:31,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:31,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:33,376 INFO L124 PetriNetUnfolderBase]: 5063/7989 cut-off events. [2024-06-14 12:18:33,376 INFO L125 PetriNetUnfolderBase]: For 1574596/1574596 co-relation queries the response was YES. [2024-06-14 12:18:33,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79058 conditions, 7989 events. 5063/7989 cut-off events. For 1574596/1574596 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 50099 event pairs, 885 based on Foata normal form. 1/7989 useless extension candidates. Maximal degree in co-relation 78845. Up to 7623 conditions per place. [2024-06-14 12:18:33,522 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 659 selfloop transitions, 75 changer transitions 0/738 dead transitions. [2024-06-14 12:18:33,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 738 transitions, 12357 flow [2024-06-14 12:18:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:18:33,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:18:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:18:33,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-14 12:18:33,523 INFO L175 Difference]: Start difference. First operand has 445 places, 710 transitions, 10610 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:18:33,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 738 transitions, 12357 flow [2024-06-14 12:18:38,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 738 transitions, 12175 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:38,675 INFO L231 Difference]: Finished difference. Result has 450 places, 721 transitions, 10855 flow [2024-06-14 12:18:38,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10428, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10855, PETRI_PLACES=450, PETRI_TRANSITIONS=721} [2024-06-14 12:18:38,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 12:18:38,676 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 721 transitions, 10855 flow [2024-06-14 12:18:38,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:38,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:38,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:38,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:18:38,676 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:38,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -528501504, now seen corresponding path program 6 times [2024-06-14 12:18:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335243294] [2024-06-14 12:18:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:38,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:39,555 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 12:18:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:39,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335243294] [2024-06-14 12:18:39,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335243294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:39,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:39,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:39,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857140052] [2024-06-14 12:18:39,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:39,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:39,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:39,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 721 transitions, 10855 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:39,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:39,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:39,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:41,759 INFO L124 PetriNetUnfolderBase]: 5076/7998 cut-off events. [2024-06-14 12:18:41,759 INFO L125 PetriNetUnfolderBase]: For 1603626/1603626 co-relation queries the response was YES. [2024-06-14 12:18:41,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79633 conditions, 7998 events. 5076/7998 cut-off events. For 1603626/1603626 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 50035 event pairs, 875 based on Foata normal form. 1/7998 useless extension candidates. Maximal degree in co-relation 79418. Up to 7609 conditions per place. [2024-06-14 12:18:41,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 644 selfloop transitions, 96 changer transitions 0/744 dead transitions. [2024-06-14 12:18:41,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 744 transitions, 12853 flow [2024-06-14 12:18:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:18:41,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-14 12:18:41,907 INFO L175 Difference]: Start difference. First operand has 450 places, 721 transitions, 10855 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:18:41,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 744 transitions, 12853 flow [2024-06-14 12:18:48,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 744 transitions, 12681 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:18:48,412 INFO L231 Difference]: Finished difference. Result has 455 places, 727 transitions, 11099 flow [2024-06-14 12:18:48,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10683, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11099, PETRI_PLACES=455, PETRI_TRANSITIONS=727} [2024-06-14 12:18:48,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-14 12:18:48,413 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 727 transitions, 11099 flow [2024-06-14 12:18:48,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:48,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:48,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:48,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:18:48,414 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:48,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:48,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1126813076, now seen corresponding path program 1 times [2024-06-14 12:18:48,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:48,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834567518] [2024-06-14 12:18:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:48,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:49,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:49,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834567518] [2024-06-14 12:18:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834567518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:49,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822785363] [2024-06-14 12:18:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:49,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:49,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:49,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 727 transitions, 11099 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:49,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:49,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:49,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:51,897 INFO L124 PetriNetUnfolderBase]: 5084/8013 cut-off events. [2024-06-14 12:18:51,897 INFO L125 PetriNetUnfolderBase]: For 1639022/1639024 co-relation queries the response was YES. [2024-06-14 12:18:51,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79966 conditions, 8013 events. 5084/8013 cut-off events. For 1639022/1639024 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 49994 event pairs, 750 based on Foata normal form. 4/8016 useless extension candidates. Maximal degree in co-relation 79750. Up to 7522 conditions per place. [2024-06-14 12:18:52,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 661 selfloop transitions, 94 changer transitions 0/759 dead transitions. [2024-06-14 12:18:52,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 759 transitions, 13005 flow [2024-06-14 12:18:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:18:52,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:18:52,033 INFO L175 Difference]: Start difference. First operand has 455 places, 727 transitions, 11099 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:18:52,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 759 transitions, 13005 flow [2024-06-14 12:18:57,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 759 transitions, 12761 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:58,000 INFO L231 Difference]: Finished difference. Result has 459 places, 731 transitions, 11108 flow [2024-06-14 12:18:58,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11108, PETRI_PLACES=459, PETRI_TRANSITIONS=731} [2024-06-14 12:18:58,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-14 12:18:58,001 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 731 transitions, 11108 flow [2024-06-14 12:18:58,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:58,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:58,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:18:58,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:18:58,001 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:58,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash -861115796, now seen corresponding path program 2 times [2024-06-14 12:18:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:58,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408473762] [2024-06-14 12:18:58,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:58,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:58,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408473762] [2024-06-14 12:18:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408473762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:58,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:58,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:58,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511561703] [2024-06-14 12:18:58,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:58,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:59,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:18:59,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 731 transitions, 11108 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:59,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:59,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:18:59,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:01,333 INFO L124 PetriNetUnfolderBase]: 5105/8044 cut-off events. [2024-06-14 12:19:01,333 INFO L125 PetriNetUnfolderBase]: For 1676366/1676368 co-relation queries the response was YES. [2024-06-14 12:19:01,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80787 conditions, 8044 events. 5105/8044 cut-off events. For 1676366/1676368 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 50344 event pairs, 872 based on Foata normal form. 4/8047 useless extension candidates. Maximal degree in co-relation 80569. Up to 7641 conditions per place. [2024-06-14 12:19:01,481 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 664 selfloop transitions, 91 changer transitions 0/759 dead transitions. [2024-06-14 12:19:01,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 759 transitions, 13012 flow [2024-06-14 12:19:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:19:01,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:19:01,482 INFO L175 Difference]: Start difference. First operand has 459 places, 731 transitions, 11108 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:19:01,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 759 transitions, 13012 flow [2024-06-14 12:19:07,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 759 transitions, 12847 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:07,490 INFO L231 Difference]: Finished difference. Result has 463 places, 735 transitions, 11198 flow [2024-06-14 12:19:07,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10967, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11198, PETRI_PLACES=463, PETRI_TRANSITIONS=735} [2024-06-14 12:19:07,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-14 12:19:07,490 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 735 transitions, 11198 flow [2024-06-14 12:19:07,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:07,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:07,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:07,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:19:07,491 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:07,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1692303354, now seen corresponding path program 3 times [2024-06-14 12:19:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:07,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911357637] [2024-06-14 12:19:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:08,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:08,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911357637] [2024-06-14 12:19:08,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911357637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:08,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:08,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026559607] [2024-06-14 12:19:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:08,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:19:08,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 735 transitions, 11198 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:08,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:08,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:19:08,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:10,774 INFO L124 PetriNetUnfolderBase]: 5100/8039 cut-off events. [2024-06-14 12:19:10,774 INFO L125 PetriNetUnfolderBase]: For 1680460/1680462 co-relation queries the response was YES. [2024-06-14 12:19:10,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80700 conditions, 8039 events. 5100/8039 cut-off events. For 1680460/1680462 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 50340 event pairs, 880 based on Foata normal form. 4/8042 useless extension candidates. Maximal degree in co-relation 80480. Up to 7655 conditions per place. [2024-06-14 12:19:10,925 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 664 selfloop transitions, 89 changer transitions 0/757 dead transitions. [2024-06-14 12:19:10,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 757 transitions, 12766 flow [2024-06-14 12:19:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:19:10,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:19:10,926 INFO L175 Difference]: Start difference. First operand has 463 places, 735 transitions, 11198 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:19:10,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 757 transitions, 12766 flow [2024-06-14 12:19:17,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 757 transitions, 12640 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:19:17,026 INFO L231 Difference]: Finished difference. Result has 467 places, 735 transitions, 11257 flow [2024-06-14 12:19:17,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11072, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11257, PETRI_PLACES=467, PETRI_TRANSITIONS=735} [2024-06-14 12:19:17,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-14 12:19:17,026 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 735 transitions, 11257 flow [2024-06-14 12:19:17,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:17,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:17,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:17,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:19:17,026 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:17,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1388730716, now seen corresponding path program 4 times [2024-06-14 12:19:17,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:17,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511242310] [2024-06-14 12:19:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:17,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511242310] [2024-06-14 12:19:18,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511242310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:18,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:18,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937986457] [2024-06-14 12:19:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:18,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:18,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:18,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:18,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:18,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:19:18,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 735 transitions, 11257 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:18,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:18,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:19:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:20,664 INFO L124 PetriNetUnfolderBase]: 5108/8044 cut-off events. [2024-06-14 12:19:20,664 INFO L125 PetriNetUnfolderBase]: For 1704813/1704813 co-relation queries the response was YES. [2024-06-14 12:19:20,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81074 conditions, 8044 events. 5108/8044 cut-off events. For 1704813/1704813 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 50331 event pairs, 875 based on Foata normal form. 2/8045 useless extension candidates. Maximal degree in co-relation 80852. Up to 7669 conditions per place. [2024-06-14 12:19:20,799 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 665 selfloop transitions, 85 changer transitions 0/754 dead transitions. [2024-06-14 12:19:20,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 754 transitions, 12827 flow [2024-06-14 12:19:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:19:20,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:19:20,800 INFO L175 Difference]: Start difference. First operand has 467 places, 735 transitions, 11257 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:19:20,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 754 transitions, 12827 flow [2024-06-14 12:19:27,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 754 transitions, 12636 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:27,067 INFO L231 Difference]: Finished difference. Result has 468 places, 737 transitions, 11270 flow [2024-06-14 12:19:27,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11066, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11270, PETRI_PLACES=468, PETRI_TRANSITIONS=737} [2024-06-14 12:19:27,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-14 12:19:27,067 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 737 transitions, 11270 flow [2024-06-14 12:19:27,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:27,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:27,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:19:27,067 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:27,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -521117490, now seen corresponding path program 5 times [2024-06-14 12:19:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:27,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170672828] [2024-06-14 12:19:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:27,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:27,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170672828] [2024-06-14 12:19:27,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170672828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:27,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:27,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:27,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382567791] [2024-06-14 12:19:27,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:27,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:27,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:27,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:28,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:19:28,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 737 transitions, 11270 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:28,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:28,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:19:28,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:30,521 INFO L124 PetriNetUnfolderBase]: 5116/8058 cut-off events. [2024-06-14 12:19:30,521 INFO L125 PetriNetUnfolderBase]: For 1728217/1728217 co-relation queries the response was YES. [2024-06-14 12:19:30,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81316 conditions, 8058 events. 5116/8058 cut-off events. For 1728217/1728217 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 50408 event pairs, 877 based on Foata normal form. 2/8059 useless extension candidates. Maximal degree in co-relation 81093. Up to 7681 conditions per place. [2024-06-14 12:19:30,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 665 selfloop transitions, 87 changer transitions 0/756 dead transitions. [2024-06-14 12:19:30,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 756 transitions, 12848 flow [2024-06-14 12:19:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:19:30,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:19:30,678 INFO L175 Difference]: Start difference. First operand has 468 places, 737 transitions, 11270 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:19:30,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 756 transitions, 12848 flow [2024-06-14 12:19:37,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 756 transitions, 12625 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:37,075 INFO L231 Difference]: Finished difference. Result has 469 places, 739 transitions, 11259 flow [2024-06-14 12:19:37,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11047, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11259, PETRI_PLACES=469, PETRI_TRANSITIONS=739} [2024-06-14 12:19:37,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 12:19:37,076 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 739 transitions, 11259 flow [2024-06-14 12:19:37,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:37,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:37,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:37,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:19:37,077 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:37,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1118709296, now seen corresponding path program 6 times [2024-06-14 12:19:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:37,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384663770] [2024-06-14 12:19:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:37,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384663770] [2024-06-14 12:19:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384663770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:38,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:38,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107964903] [2024-06-14 12:19:38,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:38,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:38,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:19:38,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 739 transitions, 11259 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:38,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:38,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:19:38,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:40,493 INFO L124 PetriNetUnfolderBase]: 5124/8070 cut-off events. [2024-06-14 12:19:40,493 INFO L125 PetriNetUnfolderBase]: For 1752182/1752182 co-relation queries the response was YES. [2024-06-14 12:19:40,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81549 conditions, 8070 events. 5124/8070 cut-off events. For 1752182/1752182 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 50510 event pairs, 875 based on Foata normal form. 2/8071 useless extension candidates. Maximal degree in co-relation 81325. Up to 7669 conditions per place. [2024-06-14 12:19:40,648 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 666 selfloop transitions, 89 changer transitions 0/759 dead transitions. [2024-06-14 12:19:40,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 759 transitions, 12849 flow [2024-06-14 12:19:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:19:40,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-14 12:19:40,649 INFO L175 Difference]: Start difference. First operand has 469 places, 739 transitions, 11259 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:19:40,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 759 transitions, 12849 flow [2024-06-14 12:19:47,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 759 transitions, 12659 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:47,450 INFO L231 Difference]: Finished difference. Result has 471 places, 741 transitions, 11288 flow [2024-06-14 12:19:47,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11069, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11288, PETRI_PLACES=471, PETRI_TRANSITIONS=741} [2024-06-14 12:19:47,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-14 12:19:47,451 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 741 transitions, 11288 flow [2024-06-14 12:19:47,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:47,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:47,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:19:47,451 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:47,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash -520717311, now seen corresponding path program 1 times [2024-06-14 12:19:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:47,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868445095] [2024-06-14 12:19:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:48,366 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 12:19:48,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:48,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868445095] [2024-06-14 12:19:48,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868445095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:48,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896176745] [2024-06-14 12:19:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:48,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:48,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:48,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:19:48,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 741 transitions, 11288 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:48,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:48,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:19:48,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:51,159 INFO L124 PetriNetUnfolderBase]: 5168/8138 cut-off events. [2024-06-14 12:19:51,159 INFO L125 PetriNetUnfolderBase]: For 1871331/1871331 co-relation queries the response was YES. [2024-06-14 12:19:51,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82208 conditions, 8138 events. 5168/8138 cut-off events. For 1871331/1871331 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51000 event pairs, 883 based on Foata normal form. 12/8149 useless extension candidates. Maximal degree in co-relation 81983. Up to 7628 conditions per place. [2024-06-14 12:19:51,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 663 selfloop transitions, 101 changer transitions 0/768 dead transitions. [2024-06-14 12:19:51,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 768 transitions, 13014 flow [2024-06-14 12:19:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:19:51,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:19:51,305 INFO L175 Difference]: Start difference. First operand has 471 places, 741 transitions, 11288 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:19:51,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 768 transitions, 13014 flow [2024-06-14 12:19:58,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 768 transitions, 12815 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:58,286 INFO L231 Difference]: Finished difference. Result has 473 places, 742 transitions, 11318 flow [2024-06-14 12:19:58,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11089, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11318, PETRI_PLACES=473, PETRI_TRANSITIONS=742} [2024-06-14 12:19:58,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-14 12:19:58,287 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 742 transitions, 11318 flow [2024-06-14 12:19:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:58,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:58,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:19:58,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:19:58,288 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:58,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1824490277, now seen corresponding path program 2 times [2024-06-14 12:19:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208506890] [2024-06-14 12:19:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:19:59,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208506890] [2024-06-14 12:19:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208506890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:59,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:59,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:19:59,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016465482] [2024-06-14 12:19:59,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:59,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:19:59,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:19:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:19:59,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:19:59,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 742 transitions, 11318 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:59,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:59,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:19:59,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:01,465 INFO L124 PetriNetUnfolderBase]: 5181/8161 cut-off events. [2024-06-14 12:20:01,465 INFO L125 PetriNetUnfolderBase]: For 1804830/1804836 co-relation queries the response was YES. [2024-06-14 12:20:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82889 conditions, 8161 events. 5181/8161 cut-off events. For 1804830/1804836 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 51193 event pairs, 890 based on Foata normal form. 7/8167 useless extension candidates. Maximal degree in co-relation 82663. Up to 7590 conditions per place. [2024-06-14 12:20:01,672 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 669 selfloop transitions, 101 changer transitions 0/774 dead transitions. [2024-06-14 12:20:01,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 774 transitions, 13790 flow [2024-06-14 12:20:01,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:20:01,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-14 12:20:01,673 INFO L175 Difference]: Start difference. First operand has 473 places, 742 transitions, 11318 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:20:01,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 774 transitions, 13790 flow [2024-06-14 12:20:08,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 774 transitions, 13583 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:08,652 INFO L231 Difference]: Finished difference. Result has 475 places, 753 transitions, 11691 flow [2024-06-14 12:20:08,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11111, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11691, PETRI_PLACES=475, PETRI_TRANSITIONS=753} [2024-06-14 12:20:08,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 12:20:08,653 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 753 transitions, 11691 flow [2024-06-14 12:20:08,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:08,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:08,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:08,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:20:08,653 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:08,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1824104327, now seen corresponding path program 3 times [2024-06-14 12:20:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989413159] [2024-06-14 12:20:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:09,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:09,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989413159] [2024-06-14 12:20:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989413159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:09,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665591684] [2024-06-14 12:20:09,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:09,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:09,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:09,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 753 transitions, 11691 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:09,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:09,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:11,894 INFO L124 PetriNetUnfolderBase]: 5199/8189 cut-off events. [2024-06-14 12:20:11,894 INFO L125 PetriNetUnfolderBase]: For 1843806/1843812 co-relation queries the response was YES. [2024-06-14 12:20:12,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84238 conditions, 8189 events. 5199/8189 cut-off events. For 1843806/1843812 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 51406 event pairs, 897 based on Foata normal form. 7/8195 useless extension candidates. Maximal degree in co-relation 84010. Up to 7611 conditions per place. [2024-06-14 12:20:12,058 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 662 selfloop transitions, 114 changer transitions 0/780 dead transitions. [2024-06-14 12:20:12,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 780 transitions, 14093 flow [2024-06-14 12:20:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:20:12,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:20:12,059 INFO L175 Difference]: Start difference. First operand has 475 places, 753 transitions, 11691 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:20:12,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 780 transitions, 14093 flow [2024-06-14 12:20:19,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 780 transitions, 13812 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:19,428 INFO L231 Difference]: Finished difference. Result has 480 places, 762 transitions, 11888 flow [2024-06-14 12:20:19,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11466, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11888, PETRI_PLACES=480, PETRI_TRANSITIONS=762} [2024-06-14 12:20:19,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 12:20:19,428 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 762 transitions, 11888 flow [2024-06-14 12:20:19,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:19,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:19,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:19,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:20:19,429 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:19,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:19,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2092032677, now seen corresponding path program 4 times [2024-06-14 12:20:19,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:19,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127898473] [2024-06-14 12:20:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:19,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:20,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:20,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127898473] [2024-06-14 12:20:20,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127898473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:20,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:20,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355273829] [2024-06-14 12:20:20,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:20,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:20,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 762 transitions, 11888 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:20,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:20,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:20,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:22,639 INFO L124 PetriNetUnfolderBase]: 5214/8210 cut-off events. [2024-06-14 12:20:22,639 INFO L125 PetriNetUnfolderBase]: For 1888291/1888297 co-relation queries the response was YES. [2024-06-14 12:20:22,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84941 conditions, 8210 events. 5214/8210 cut-off events. For 1888291/1888297 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 51548 event pairs, 895 based on Foata normal form. 9/8218 useless extension candidates. Maximal degree in co-relation 84711. Up to 7461 conditions per place. [2024-06-14 12:20:22,803 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 635 selfloop transitions, 154 changer transitions 0/793 dead transitions. [2024-06-14 12:20:22,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 793 transitions, 14155 flow [2024-06-14 12:20:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:20:22,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:20:22,804 INFO L175 Difference]: Start difference. First operand has 480 places, 762 transitions, 11888 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:20:22,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 793 transitions, 14155 flow [2024-06-14 12:20:30,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 793 transitions, 13869 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:30,228 INFO L231 Difference]: Finished difference. Result has 485 places, 771 transitions, 12272 flow [2024-06-14 12:20:30,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11607, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12272, PETRI_PLACES=485, PETRI_TRANSITIONS=771} [2024-06-14 12:20:30,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-14 12:20:30,228 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 771 transitions, 12272 flow [2024-06-14 12:20:30,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:30,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:30,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:30,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:20:30,229 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:30,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1737679427, now seen corresponding path program 5 times [2024-06-14 12:20:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085327145] [2024-06-14 12:20:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:31,232 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 12:20:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085327145] [2024-06-14 12:20:31,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085327145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:31,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:31,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:31,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409944665] [2024-06-14 12:20:31,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:31,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:31,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:31,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:31,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:31,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:31,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 771 transitions, 12272 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:31,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:31,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:33,981 INFO L124 PetriNetUnfolderBase]: 5208/8206 cut-off events. [2024-06-14 12:20:33,981 INFO L125 PetriNetUnfolderBase]: For 1891870/1891876 co-relation queries the response was YES. [2024-06-14 12:20:34,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85439 conditions, 8206 events. 5208/8206 cut-off events. For 1891870/1891876 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 51566 event pairs, 899 based on Foata normal form. 8/8213 useless extension candidates. Maximal degree in co-relation 85208. Up to 7525 conditions per place. [2024-06-14 12:20:34,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 635 selfloop transitions, 148 changer transitions 0/787 dead transitions. [2024-06-14 12:20:34,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 787 transitions, 13904 flow [2024-06-14 12:20:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:20:34,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:20:34,122 INFO L175 Difference]: Start difference. First operand has 485 places, 771 transitions, 12272 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:20:34,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 787 transitions, 13904 flow [2024-06-14 12:20:41,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 787 transitions, 13400 flow, removed 179 selfloop flow, removed 5 redundant places. [2024-06-14 12:20:41,134 INFO L231 Difference]: Finished difference. Result has 488 places, 771 transitions, 12074 flow [2024-06-14 12:20:41,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11768, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12074, PETRI_PLACES=488, PETRI_TRANSITIONS=771} [2024-06-14 12:20:41,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-14 12:20:41,134 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 771 transitions, 12074 flow [2024-06-14 12:20:41,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:41,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:41,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:41,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:20:41,135 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1472212695, now seen corresponding path program 6 times [2024-06-14 12:20:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:41,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545865263] [2024-06-14 12:20:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:41,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545865263] [2024-06-14 12:20:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545865263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:41,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:41,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:41,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021788965] [2024-06-14 12:20:41,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:41,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:42,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:42,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 771 transitions, 12074 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:42,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:42,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:42,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:44,715 INFO L124 PetriNetUnfolderBase]: 5215/8212 cut-off events. [2024-06-14 12:20:44,716 INFO L125 PetriNetUnfolderBase]: For 1893064/1893070 co-relation queries the response was YES. [2024-06-14 12:20:44,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85545 conditions, 8212 events. 5215/8212 cut-off events. For 1893064/1893070 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 51487 event pairs, 895 based on Foata normal form. 7/8218 useless extension candidates. Maximal degree in co-relation 85312. Up to 7509 conditions per place. [2024-06-14 12:20:44,859 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 624 selfloop transitions, 166 changer transitions 0/794 dead transitions. [2024-06-14 12:20:44,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 794 transitions, 13757 flow [2024-06-14 12:20:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:20:44,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:20:44,860 INFO L175 Difference]: Start difference. First operand has 488 places, 771 transitions, 12074 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:20:44,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 794 transitions, 13757 flow [2024-06-14 12:20:52,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 794 transitions, 13360 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:20:52,383 INFO L231 Difference]: Finished difference. Result has 491 places, 777 transitions, 12094 flow [2024-06-14 12:20:52,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11677, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12094, PETRI_PLACES=491, PETRI_TRANSITIONS=777} [2024-06-14 12:20:52,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-14 12:20:52,383 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 777 transitions, 12094 flow [2024-06-14 12:20:52,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:52,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:52,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:20:52,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:20:52,383 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:52,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 123922954, now seen corresponding path program 5 times [2024-06-14 12:20:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:52,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221733982] [2024-06-14 12:20:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:20:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:53,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221733982] [2024-06-14 12:20:53,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221733982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:53,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:53,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:20:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221780980] [2024-06-14 12:20:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:20:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:20:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:20:53,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:20:53,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 777 transitions, 12094 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:53,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:53,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:20:53,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:55,899 INFO L124 PetriNetUnfolderBase]: 5241/8244 cut-off events. [2024-06-14 12:20:55,899 INFO L125 PetriNetUnfolderBase]: For 1949312/1949318 co-relation queries the response was YES. [2024-06-14 12:20:56,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86227 conditions, 8244 events. 5241/8244 cut-off events. For 1949312/1949318 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 51658 event pairs, 889 based on Foata normal form. 8/8251 useless extension candidates. Maximal degree in co-relation 85992. Up to 7271 conditions per place. [2024-06-14 12:20:56,047 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 631 selfloop transitions, 174 changer transitions 0/809 dead transitions. [2024-06-14 12:20:56,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 809 transitions, 14806 flow [2024-06-14 12:20:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:20:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:20:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 12:20:56,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 12:20:56,048 INFO L175 Difference]: Start difference. First operand has 491 places, 777 transitions, 12094 flow. Second operand 8 states and 154 transitions. [2024-06-14 12:20:56,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 809 transitions, 14806 flow [2024-06-14 12:21:03,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 809 transitions, 14482 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:03,119 INFO L231 Difference]: Finished difference. Result has 492 places, 783 transitions, 12218 flow [2024-06-14 12:21:03,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11776, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12218, PETRI_PLACES=492, PETRI_TRANSITIONS=783} [2024-06-14 12:21:03,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-14 12:21:03,120 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 783 transitions, 12218 flow [2024-06-14 12:21:03,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:03,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:03,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:03,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:21:03,121 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:03,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:03,121 INFO L85 PathProgramCache]: Analyzing trace with hash 123928751, now seen corresponding path program 5 times [2024-06-14 12:21:03,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:03,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819109654] [2024-06-14 12:21:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:03,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:03,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:03,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819109654] [2024-06-14 12:21:03,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819109654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:03,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:03,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602068035] [2024-06-14 12:21:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:03,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:03,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:03,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:21:03,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 783 transitions, 12218 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:03,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:03,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:21:03,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:06,664 INFO L124 PetriNetUnfolderBase]: 5329/8368 cut-off events. [2024-06-14 12:21:06,664 INFO L125 PetriNetUnfolderBase]: For 2085330/2085336 co-relation queries the response was YES. [2024-06-14 12:21:06,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88887 conditions, 8368 events. 5329/8368 cut-off events. For 2085330/2085336 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 52493 event pairs, 904 based on Foata normal form. 14/8381 useless extension candidates. Maximal degree in co-relation 88652. Up to 6897 conditions per place. [2024-06-14 12:21:06,822 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 622 selfloop transitions, 193 changer transitions 0/819 dead transitions. [2024-06-14 12:21:06,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 819 transitions, 14958 flow [2024-06-14 12:21:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:21:06,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:21:06,823 INFO L175 Difference]: Start difference. First operand has 492 places, 783 transitions, 12218 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:21:06,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 819 transitions, 14958 flow [2024-06-14 12:21:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 819 transitions, 14673 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:14,432 INFO L231 Difference]: Finished difference. Result has 497 places, 790 transitions, 12556 flow [2024-06-14 12:21:14,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11933, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12556, PETRI_PLACES=497, PETRI_TRANSITIONS=790} [2024-06-14 12:21:14,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 12:21:14,432 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 790 transitions, 12556 flow [2024-06-14 12:21:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:14,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:14,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:14,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:21:14,433 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:14,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 123928534, now seen corresponding path program 6 times [2024-06-14 12:21:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178794375] [2024-06-14 12:21:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:15,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178794375] [2024-06-14 12:21:15,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178794375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:15,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:15,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:15,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547672704] [2024-06-14 12:21:15,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:15,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:15,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:15,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:21:15,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 790 transitions, 12556 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:15,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:15,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:21:15,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:18,165 INFO L124 PetriNetUnfolderBase]: 5339/8376 cut-off events. [2024-06-14 12:21:18,165 INFO L125 PetriNetUnfolderBase]: For 2060403/2060409 co-relation queries the response was YES. [2024-06-14 12:21:18,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89869 conditions, 8376 events. 5339/8376 cut-off events. For 2060403/2060409 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 52431 event pairs, 895 based on Foata normal form. 8/8383 useless extension candidates. Maximal degree in co-relation 89633. Up to 7403 conditions per place. [2024-06-14 12:21:18,327 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 644 selfloop transitions, 169 changer transitions 0/817 dead transitions. [2024-06-14 12:21:18,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 817 transitions, 14962 flow [2024-06-14 12:21:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:21:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:21:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:21:18,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 12:21:18,328 INFO L175 Difference]: Start difference. First operand has 497 places, 790 transitions, 12556 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:21:18,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 817 transitions, 14962 flow [2024-06-14 12:21:25,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 817 transitions, 14519 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:25,823 INFO L231 Difference]: Finished difference. Result has 500 places, 793 transitions, 12503 flow [2024-06-14 12:21:25,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12113, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12503, PETRI_PLACES=500, PETRI_TRANSITIONS=793} [2024-06-14 12:21:25,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-14 12:21:25,824 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 793 transitions, 12503 flow [2024-06-14 12:21:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:21:25,824 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:25,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1771473044, now seen corresponding path program 7 times [2024-06-14 12:21:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:25,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115263164] [2024-06-14 12:21:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:26,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:26,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115263164] [2024-06-14 12:21:26,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115263164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:26,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:26,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218373018] [2024-06-14 12:21:26,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:26,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:26,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:26,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:26,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:26,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:21:26,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 793 transitions, 12503 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:26,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:26,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:21:26,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:29,329 INFO L124 PetriNetUnfolderBase]: 5349/8406 cut-off events. [2024-06-14 12:21:29,329 INFO L125 PetriNetUnfolderBase]: For 2070898/2070904 co-relation queries the response was YES. [2024-06-14 12:21:29,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89221 conditions, 8406 events. 5349/8406 cut-off events. For 2070898/2070904 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 52817 event pairs, 904 based on Foata normal form. 8/8413 useless extension candidates. Maximal degree in co-relation 88984. Up to 7413 conditions per place. [2024-06-14 12:21:29,478 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 600 selfloop transitions, 217 changer transitions 0/821 dead transitions. [2024-06-14 12:21:29,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 821 transitions, 14929 flow [2024-06-14 12:21:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:21:29,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:21:29,486 INFO L175 Difference]: Start difference. First operand has 500 places, 793 transitions, 12503 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:21:29,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 821 transitions, 14929 flow [2024-06-14 12:21:36,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 821 transitions, 14565 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:21:36,415 INFO L231 Difference]: Finished difference. Result has 501 places, 796 transitions, 12636 flow [2024-06-14 12:21:36,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12145, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12636, PETRI_PLACES=501, PETRI_TRANSITIONS=796} [2024-06-14 12:21:36,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-14 12:21:36,416 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 796 transitions, 12636 flow [2024-06-14 12:21:36,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:36,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:36,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:36,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:21:36,416 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:36,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:36,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1771057334, now seen corresponding path program 8 times [2024-06-14 12:21:36,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:36,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318499700] [2024-06-14 12:21:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:36,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:37,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:37,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318499700] [2024-06-14 12:21:37,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318499700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:37,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:37,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:21:37,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669425260] [2024-06-14 12:21:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:37,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:21:37,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:21:37,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:21:37,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:21:37,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 796 transitions, 12636 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:37,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:37,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:21:37,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:39,946 INFO L124 PetriNetUnfolderBase]: 5359/8412 cut-off events. [2024-06-14 12:21:39,947 INFO L125 PetriNetUnfolderBase]: For 2099259/2099265 co-relation queries the response was YES. [2024-06-14 12:21:40,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89617 conditions, 8412 events. 5359/8412 cut-off events. For 2099259/2099265 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 52785 event pairs, 892 based on Foata normal form. 8/8419 useless extension candidates. Maximal degree in co-relation 89379. Up to 7423 conditions per place. [2024-06-14 12:21:40,100 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 587 selfloop transitions, 230 changer transitions 0/821 dead transitions. [2024-06-14 12:21:40,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 821 transitions, 14774 flow [2024-06-14 12:21:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:21:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:21:40,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:21:40,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:21:40,101 INFO L175 Difference]: Start difference. First operand has 501 places, 796 transitions, 12636 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:21:40,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 821 transitions, 14774 flow [2024-06-14 12:21:47,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 821 transitions, 14231 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:21:47,145 INFO L231 Difference]: Finished difference. Result has 503 places, 800 transitions, 12627 flow [2024-06-14 12:21:47,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12627, PETRI_PLACES=503, PETRI_TRANSITIONS=800} [2024-06-14 12:21:47,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-14 12:21:47,146 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 800 transitions, 12627 flow [2024-06-14 12:21:47,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:47,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:47,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:21:47,146 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1765932104, now seen corresponding path program 9 times [2024-06-14 12:21:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964724100] [2024-06-14 12:21:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964724100] [2024-06-14 12:21:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964724100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:47,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:47,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377143871] [2024-06-14 12:21:47,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:47,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:47,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:47,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:48,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:21:48,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 800 transitions, 12627 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:48,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:48,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:21:48,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:21:50,920 INFO L124 PetriNetUnfolderBase]: 5401/8478 cut-off events. [2024-06-14 12:21:50,920 INFO L125 PetriNetUnfolderBase]: For 2166823/2166829 co-relation queries the response was YES. [2024-06-14 12:21:51,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90833 conditions, 8478 events. 5401/8478 cut-off events. For 2166823/2166829 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 53281 event pairs, 900 based on Foata normal form. 8/8485 useless extension candidates. Maximal degree in co-relation 90594. Up to 7463 conditions per place. [2024-06-14 12:21:51,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 621 selfloop transitions, 212 changer transitions 0/837 dead transitions. [2024-06-14 12:21:51,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 837 transitions, 15550 flow [2024-06-14 12:21:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:21:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:21:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 12:21:51,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-14 12:21:51,221 INFO L175 Difference]: Start difference. First operand has 503 places, 800 transitions, 12627 flow. Second operand 11 states and 191 transitions. [2024-06-14 12:21:51,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 837 transitions, 15550 flow [2024-06-14 12:21:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 837 transitions, 15216 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:21:58,205 INFO L231 Difference]: Finished difference. Result has 510 places, 810 transitions, 12886 flow [2024-06-14 12:21:58,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12303, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12886, PETRI_PLACES=510, PETRI_TRANSITIONS=810} [2024-06-14 12:21:58,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-14 12:21:58,205 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 810 transitions, 12886 flow [2024-06-14 12:21:58,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:58,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:21:58,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:21:58,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:21:58,206 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:21:58,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:21:58,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1765918867, now seen corresponding path program 6 times [2024-06-14 12:21:58,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:21:58,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849829150] [2024-06-14 12:21:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:21:58,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:21:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:21:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:21:59,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:21:59,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849829150] [2024-06-14 12:21:59,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849829150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:21:59,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:21:59,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:21:59,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950475560] [2024-06-14 12:21:59,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:21:59,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:21:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:21:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:21:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:21:59,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:21:59,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 810 transitions, 12886 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:21:59,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:21:59,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:21:59,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:02,122 INFO L124 PetriNetUnfolderBase]: 5441/8528 cut-off events. [2024-06-14 12:22:02,122 INFO L125 PetriNetUnfolderBase]: For 2267251/2267251 co-relation queries the response was YES. [2024-06-14 12:22:02,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91763 conditions, 8528 events. 5441/8528 cut-off events. For 2267251/2267251 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 53491 event pairs, 985 based on Foata normal form. 8/8535 useless extension candidates. Maximal degree in co-relation 91523. Up to 8119 conditions per place. [2024-06-14 12:22:02,282 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 766 selfloop transitions, 62 changer transitions 0/832 dead transitions. [2024-06-14 12:22:02,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 832 transitions, 14740 flow [2024-06-14 12:22:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:22:02,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:22:02,283 INFO L175 Difference]: Start difference. First operand has 510 places, 810 transitions, 12886 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:22:02,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 832 transitions, 14740 flow [2024-06-14 12:22:09,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 832 transitions, 14432 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:22:09,051 INFO L231 Difference]: Finished difference. Result has 513 places, 814 transitions, 12835 flow [2024-06-14 12:22:09,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12578, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12835, PETRI_PLACES=513, PETRI_TRANSITIONS=814} [2024-06-14 12:22:09,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-14 12:22:09,052 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 814 transitions, 12835 flow [2024-06-14 12:22:09,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:09,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:22:09,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:22:09,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:22:09,052 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:22:09,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:22:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1765931887, now seen corresponding path program 7 times [2024-06-14 12:22:09,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:22:09,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129691995] [2024-06-14 12:22:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:22:09,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:22:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:22:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:22:09,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:22:09,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129691995] [2024-06-14 12:22:09,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129691995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:22:09,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:22:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:22:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344320613] [2024-06-14 12:22:09,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:22:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:22:09,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:22:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:22:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:22:09,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:22:09,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 814 transitions, 12835 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:22:09,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:22:09,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:22:09,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:22:12,744 INFO L124 PetriNetUnfolderBase]: 5545/8681 cut-off events. [2024-06-14 12:22:12,744 INFO L125 PetriNetUnfolderBase]: For 2401590/2401596 co-relation queries the response was YES. [2024-06-14 12:22:12,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94506 conditions, 8681 events. 5545/8681 cut-off events. For 2401590/2401596 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 54495 event pairs, 907 based on Foata normal form. 14/8694 useless extension candidates. Maximal degree in co-relation 94265. Up to 7023 conditions per place. [2024-06-14 12:22:12,894 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 608 selfloop transitions, 237 changer transitions 0/849 dead transitions. [2024-06-14 12:22:12,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 849 transitions, 15629 flow [2024-06-14 12:22:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:22:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:22:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:22:12,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-14 12:22:12,895 INFO L175 Difference]: Start difference. First operand has 513 places, 814 transitions, 12835 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:22:12,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 849 transitions, 15629 flow