./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038.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/mix038.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix038.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix038.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-bcb38a6-m [2024-06-04 15:12:24,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:12:24,183 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:12:24,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:12:24,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:12:24,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:12:24,205 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:12:24,205 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:12:24,205 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:12:24,206 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:12:24,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:12:24,207 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:12:24,207 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:12:24,208 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:12:24,208 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:12:24,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:12:24,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:12:24,209 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:12:24,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:12:24,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:12:24,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:12:24,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:12:24,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:12:24,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:12:24,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:12:24,213 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:12:24,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:12:24,213 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:12:24,214 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:12:24,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:12:24,215 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:12:24,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:12:24,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:12:24,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:12:24,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:12:24,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:12:24,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:12:24,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:12:24,218 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:12:24,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:12:24,218 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:12:24,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:12:24,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:12:24,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:12:24,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:12:24,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:12:24,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:12:24,471 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:12:24,471 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:12:24,472 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-04 15:12:25,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:12:25,851 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:12:25,851 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-04 15:12:25,866 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954e3defe/c687bd025a0e4a5c86c4af154673d3ef/FLAGca3aa9444 [2024-06-04 15:12:25,878 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/954e3defe/c687bd025a0e4a5c86c4af154673d3ef [2024-06-04 15:12:25,880 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:12:25,885 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:12:25,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix038.opt.yml/witness.yml [2024-06-04 15:12:26,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:12:26,042 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:12:26,043 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:12:26,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:12:26,047 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:12:26,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:12:25" (1/2) ... [2024-06-04 15:12:26,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a61dbd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:12:26, skipping insertion in model container [2024-06-04 15:12:26,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:12:25" (1/2) ... [2024-06-04 15:12:26,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25c0a694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:12:26, skipping insertion in model container [2024-06-04 15:12:26,050 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:12:26" (2/2) ... [2024-06-04 15:12:26,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a61dbd7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26, skipping insertion in model container [2024-06-04 15:12:26,051 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:12:26" (2/2) ... [2024-06-04 15:12:26,051 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:12:26,137 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:12:26,138 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-04 15:12:26,139 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-04 15:12:26,139 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) [2024-06-04 15:12:26,139 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:12:26,139 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-04 15:12:26,185 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:12:26,466 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:12:26,484 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:12:26,602 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:12:26,658 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:12:26,659 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26 WrapperNode [2024-06-04 15:12:26,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:12:26,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:12:26,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:12:26,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:12:26,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,738 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 133 [2024-06-04 15:12:26,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:12:26,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:12:26,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:12:26,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:12:26,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,754 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,768 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]. [2024-06-04 15:12:26,768 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,768 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,782 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:12:26,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:12:26,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:12:26,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:12:26,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (1/1) ... [2024-06-04 15:12:26,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:12:26,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:12:26,832 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) [2024-06-04 15:12:26,865 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 [2024-06-04 15:12:26,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:12:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:12:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:12:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:12:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:12:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:12:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:12:26,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:12:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:12:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:12:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:12:26,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:12:26,891 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:12:27,059 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:12:27,061 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:12:27,372 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:12:27,372 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:12:27,564 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:12:27,564 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:12:27,565 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:12:27 BoogieIcfgContainer [2024-06-04 15:12:27,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:12:27,570 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:12:27,570 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:12:27,573 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:12:27,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:12:25" (1/4) ... [2024-06-04 15:12:27,574 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24002d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:12:27, skipping insertion in model container [2024-06-04 15:12:27,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:12:26" (2/4) ... [2024-06-04 15:12:27,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24002d5c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:12:27, skipping insertion in model container [2024-06-04 15:12:27,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:12:26" (3/4) ... [2024-06-04 15:12:27,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24002d5c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:12:27, skipping insertion in model container [2024-06-04 15:12:27,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:12:27" (4/4) ... [2024-06-04 15:12:27,576 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038.opt.i [2024-06-04 15:12:27,593 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:12:27,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 15:12:27,593 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:12:27,649 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:12:27,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 15:12:27,725 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-04 15:12:27,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:12:27,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:12:27,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-04 15:12:27,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-04 15:12:27,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:12:27,752 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;@3aab5d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:12:27,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 15:12:27,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:12:27,758 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:12:27,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:12:27,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:27,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:12:27,760 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)] === [2024-06-04 15:12:27,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:27,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1743886950, now seen corresponding path program 1 times [2024-06-04 15:12:27,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:27,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980354305] [2024-06-04 15:12:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:28,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:28,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980354305] [2024-06-04 15:12:28,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980354305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:28,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:28,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:12:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240165892] [2024-06-04 15:12:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:28,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:12:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:12:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:12:28,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-04 15:12:28,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:28,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:28,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-04 15:12:28,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:29,342 INFO L124 PetriNetUnfolderBase]: 1116/1802 cut-off events. [2024-06-04 15:12:29,343 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 15:12:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3555 conditions, 1802 events. 1116/1802 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9051 event pairs, 765 based on Foata normal form. 1/1733 useless extension candidates. Maximal degree in co-relation 3540. Up to 1676 conditions per place. [2024-06-04 15:12:29,363 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-04 15:12:29,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-04 15:12:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:12:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:12:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-04 15:12:29,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-04 15:12:29,377 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-04 15:12:29,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-04 15:12:29,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:29,384 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-04 15:12:29,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-04 15:12:29,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-04 15:12:29,390 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-04 15:12:29,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:29,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:29,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:29,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:12:29,391 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)] === [2024-06-04 15:12:29,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:29,392 INFO L85 PathProgramCache]: Analyzing trace with hash -838079111, now seen corresponding path program 1 times [2024-06-04 15:12:29,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:29,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662227964] [2024-06-04 15:12:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:30,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662227964] [2024-06-04 15:12:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662227964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:30,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:30,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:12:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764591083] [2024-06-04 15:12:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:30,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:12:30,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:30,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:12:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:12:30,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:30,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:30,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:30,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:30,562 INFO L124 PetriNetUnfolderBase]: 1280/1998 cut-off events. [2024-06-04 15:12:30,562 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-04 15:12:30,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 1998 events. 1280/1998 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9816 event pairs, 750 based on Foata normal form. 3/1965 useless extension candidates. Maximal degree in co-relation 4506. Up to 1897 conditions per place. [2024-06-04 15:12:30,576 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-04 15:12:30,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-04 15:12:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:12:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:12:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-04 15:12:30,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-04 15:12:30,578 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-04 15:12:30,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-04 15:12:30,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:12:30,581 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-04 15:12:30,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-04 15:12:30,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-04 15:12:30,582 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-04 15:12:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:30,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:30,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:30,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:12:30,583 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)] === [2024-06-04 15:12:30,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash -210647529, now seen corresponding path program 1 times [2024-06-04 15:12:30,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:30,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759019031] [2024-06-04 15:12:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:30,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759019031] [2024-06-04 15:12:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759019031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:12:31,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609433831] [2024-06-04 15:12:31,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:31,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:12:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:12:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:12:31,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:31,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:31,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:31,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:31,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:31,824 INFO L124 PetriNetUnfolderBase]: 1302/2077 cut-off events. [2024-06-04 15:12:31,825 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-04 15:12:31,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 2077 events. 1302/2077 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10516 event pairs, 470 based on Foata normal form. 7/2073 useless extension candidates. Maximal degree in co-relation 5149. Up to 1800 conditions per place. [2024-06-04 15:12:31,838 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-04 15:12:31,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 412 flow [2024-06-04 15:12:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:12:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:12:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 15:12:31,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-06-04 15:12:31,841 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 132 transitions. [2024-06-04 15:12:31,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 412 flow [2024-06-04 15:12:31,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 398 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 15:12:31,844 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-04 15:12:31,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-04 15:12:31,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-04 15:12:31,845 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-04 15:12:31,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:31,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:31,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:31,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:12:31,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:31,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash -568775082, now seen corresponding path program 1 times [2024-06-04 15:12:31,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:31,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009553927] [2024-06-04 15:12:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:32,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009553927] [2024-06-04 15:12:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009553927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:32,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:12:32,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133622108] [2024-06-04 15:12:32,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:32,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:12:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:12:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:12:32,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:32,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-04 15:12:32,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:32,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:33,164 INFO L124 PetriNetUnfolderBase]: 1384/2221 cut-off events. [2024-06-04 15:12:33,165 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-04 15:12:33,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 2221 events. 1384/2221 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11486 event pairs, 321 based on Foata normal form. 26/2234 useless extension candidates. Maximal degree in co-relation 6562. Up to 1764 conditions per place. [2024-06-04 15:12:33,183 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2024-06-04 15:12:33,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 529 flow [2024-06-04 15:12:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 15:12:33,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-06-04 15:12:33,188 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 154 transitions. [2024-06-04 15:12:33,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 529 flow [2024-06-04 15:12:33,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 521 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 15:12:33,197 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 287 flow [2024-06-04 15:12:33,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-04 15:12:33,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-04 15:12:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 287 flow [2024-06-04 15:12:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-04 15:12:33,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:33,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:33,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:12:33,199 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)] === [2024-06-04 15:12:33,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1208652322, now seen corresponding path program 1 times [2024-06-04 15:12:33,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:33,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934529269] [2024-06-04 15:12:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934529269] [2024-06-04 15:12:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934529269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:12:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785108148] [2024-06-04 15:12:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:33,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:12:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:12:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:12:34,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:34,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:34,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:34,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:34,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:34,567 INFO L124 PetriNetUnfolderBase]: 1204/2038 cut-off events. [2024-06-04 15:12:34,567 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2024-06-04 15:12:34,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6372 conditions, 2038 events. 1204/2038 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11049 event pairs, 447 based on Foata normal form. 4/2034 useless extension candidates. Maximal degree in co-relation 6349. Up to 1814 conditions per place. [2024-06-04 15:12:34,586 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-04 15:12:34,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 431 flow [2024-06-04 15:12:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:12:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:12:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-04 15:12:34,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-04 15:12:34,588 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 287 flow. Second operand 5 states and 106 transitions. [2024-06-04 15:12:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 431 flow [2024-06-04 15:12:34,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 387 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:34,596 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 267 flow [2024-06-04 15:12:34,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-06-04 15:12:34,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-04 15:12:34,599 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 267 flow [2024-06-04 15:12:34,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:34,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:34,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:34,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:12:34,604 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)] === [2024-06-04 15:12:34,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1880161743, now seen corresponding path program 1 times [2024-06-04 15:12:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721855799] [2024-06-04 15:12:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:35,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:35,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721855799] [2024-06-04 15:12:35,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721855799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:35,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:35,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826640747] [2024-06-04 15:12:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:35,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:35,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:35,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:35,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:35,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:35,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:35,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:36,182 INFO L124 PetriNetUnfolderBase]: 1386/2223 cut-off events. [2024-06-04 15:12:36,183 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2024-06-04 15:12:36,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2223 events. 1386/2223 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11474 event pairs, 459 based on Foata normal form. 8/2217 useless extension candidates. Maximal degree in co-relation 7054. Up to 1943 conditions per place. [2024-06-04 15:12:36,200 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2024-06-04 15:12:36,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 509 flow [2024-06-04 15:12:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-04 15:12:36,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077519379844961 [2024-06-04 15:12:36,202 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 267 flow. Second operand 6 states and 131 transitions. [2024-06-04 15:12:36,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 509 flow [2024-06-04 15:12:36,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 487 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:36,209 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 317 flow [2024-06-04 15:12:36,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=317, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-04 15:12:36,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-04 15:12:36,212 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 317 flow [2024-06-04 15:12:36,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:36,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:36,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:36,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:12:36,213 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)] === [2024-06-04 15:12:36,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1873611753, now seen corresponding path program 2 times [2024-06-04 15:12:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008847877] [2024-06-04 15:12:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008847877] [2024-06-04 15:12:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008847877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:37,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:37,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:37,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871556661] [2024-06-04 15:12:37,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:37,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:37,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:37,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:37,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:37,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 317 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:37,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:37,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:37,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:37,744 INFO L124 PetriNetUnfolderBase]: 1354/2152 cut-off events. [2024-06-04 15:12:37,745 INFO L125 PetriNetUnfolderBase]: For 5808/5808 co-relation queries the response was YES. [2024-06-04 15:12:37,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7154 conditions, 2152 events. 1354/2152 cut-off events. For 5808/5808 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10870 event pairs, 469 based on Foata normal form. 4/2141 useless extension candidates. Maximal degree in co-relation 7129. Up to 1895 conditions per place. [2024-06-04 15:12:37,773 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 47 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-04 15:12:37,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 495 flow [2024-06-04 15:12:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-04 15:12:37,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49224806201550386 [2024-06-04 15:12:37,775 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 317 flow. Second operand 6 states and 127 transitions. [2024-06-04 15:12:37,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 495 flow [2024-06-04 15:12:37,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 466 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:37,783 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 336 flow [2024-06-04 15:12:37,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-06-04 15:12:37,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-04 15:12:37,784 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 336 flow [2024-06-04 15:12:37,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:37,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:37,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:37,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:12:37,785 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)] === [2024-06-04 15:12:37,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1666816423, now seen corresponding path program 1 times [2024-06-04 15:12:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:37,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925292391] [2024-06-04 15:12:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:39,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:39,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925292391] [2024-06-04 15:12:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925292391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:39,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:39,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:12:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216395812] [2024-06-04 15:12:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:39,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:12:39,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:39,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:12:39,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:12:39,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:39,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 336 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-04 15:12:39,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:39,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:39,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:39,908 INFO L124 PetriNetUnfolderBase]: 1176/1973 cut-off events. [2024-06-04 15:12:39,909 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-06-04 15:12:39,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6562 conditions, 1973 events. 1176/1973 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10414 event pairs, 406 based on Foata normal form. 4/1963 useless extension candidates. Maximal degree in co-relation 6536. Up to 1742 conditions per place. [2024-06-04 15:12:39,922 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-04 15:12:39,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 569 flow [2024-06-04 15:12:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:12:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:12:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-04 15:12:39,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-04 15:12:39,927 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 336 flow. Second operand 7 states and 143 transitions. [2024-06-04 15:12:39,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 569 flow [2024-06-04 15:12:39,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 499 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:12:39,934 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 346 flow [2024-06-04 15:12:39,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-04 15:12:39,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-04 15:12:39,936 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 346 flow [2024-06-04 15:12:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-04 15:12:39,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:39,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:39,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:12:39,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:39,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1850510522, now seen corresponding path program 1 times [2024-06-04 15:12:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:39,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32635496] [2024-06-04 15:12:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:40,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:40,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32635496] [2024-06-04 15:12:40,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32635496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:40,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:40,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:12:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355694574] [2024-06-04 15:12:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:40,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:12:40,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:12:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:12:40,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:40,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:40,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:40,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:40,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:41,332 INFO L124 PetriNetUnfolderBase]: 1173/1969 cut-off events. [2024-06-04 15:12:41,332 INFO L125 PetriNetUnfolderBase]: For 6996/6996 co-relation queries the response was YES. [2024-06-04 15:12:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 1969 events. 1173/1969 cut-off events. For 6996/6996 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10372 event pairs, 420 based on Foata normal form. 1/1956 useless extension candidates. Maximal degree in co-relation 6782. Up to 1771 conditions per place. [2024-06-04 15:12:41,345 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 56 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-04 15:12:41,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 514 flow [2024-06-04 15:12:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:12:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:12:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-04 15:12:41,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-04 15:12:41,347 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 346 flow. Second operand 5 states and 101 transitions. [2024-06-04 15:12:41,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 514 flow [2024-06-04 15:12:41,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 481 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:41,357 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 361 flow [2024-06-04 15:12:41,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-04 15:12:41,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-04 15:12:41,359 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 361 flow [2024-06-04 15:12:41,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:41,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:41,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:41,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:12:41,359 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:41,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1564318406, now seen corresponding path program 1 times [2024-06-04 15:12:41,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:41,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23145428] [2024-06-04 15:12:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:41,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:42,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23145428] [2024-06-04 15:12:42,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23145428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:42,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:42,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:42,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506985875] [2024-06-04 15:12:42,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:42,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:42,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:42,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:42,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:42,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:42,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:42,762 INFO L124 PetriNetUnfolderBase]: 1340/2155 cut-off events. [2024-06-04 15:12:42,762 INFO L125 PetriNetUnfolderBase]: For 9912/9912 co-relation queries the response was YES. [2024-06-04 15:12:42,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 2155 events. 1340/2155 cut-off events. For 9912/9912 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10986 event pairs, 492 based on Foata normal form. 1/2155 useless extension candidates. Maximal degree in co-relation 7926. Up to 2009 conditions per place. [2024-06-04 15:12:42,776 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 58 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-04 15:12:42,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 75 transitions, 545 flow [2024-06-04 15:12:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-04 15:12:42,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:12:42,778 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 361 flow. Second operand 6 states and 112 transitions. [2024-06-04 15:12:42,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 75 transitions, 545 flow [2024-06-04 15:12:42,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 519 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:42,787 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 393 flow [2024-06-04 15:12:42,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-04 15:12:42,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-04 15:12:42,790 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 393 flow [2024-06-04 15:12:42,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:42,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:42,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:12:42,791 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)] === [2024-06-04 15:12:42,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1432728446, now seen corresponding path program 1 times [2024-06-04 15:12:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745397248] [2024-06-04 15:12:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:42,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:43,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745397248] [2024-06-04 15:12:43,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745397248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:43,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:43,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:12:43,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917458445] [2024-06-04 15:12:43,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:43,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:12:43,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:43,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:12:43,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:12:43,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:43,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:43,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:43,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:44,365 INFO L124 PetriNetUnfolderBase]: 1543/2447 cut-off events. [2024-06-04 15:12:44,366 INFO L125 PetriNetUnfolderBase]: For 16170/16172 co-relation queries the response was YES. [2024-06-04 15:12:44,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9793 conditions, 2447 events. 1543/2447 cut-off events. For 16170/16172 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12646 event pairs, 357 based on Foata normal form. 16/2457 useless extension candidates. Maximal degree in co-relation 9763. Up to 1728 conditions per place. [2024-06-04 15:12:44,381 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-04 15:12:44,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 743 flow [2024-06-04 15:12:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:12:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:12:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 15:12:44,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-04 15:12:44,384 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-04 15:12:44,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 743 flow [2024-06-04 15:12:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 103 transitions, 707 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:44,395 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 433 flow [2024-06-04 15:12:44,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-06-04 15:12:44,395 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-04 15:12:44,396 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 433 flow [2024-06-04 15:12:44,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:44,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:44,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:12:44,396 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)] === [2024-06-04 15:12:44,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1435585406, now seen corresponding path program 2 times [2024-06-04 15:12:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711411318] [2024-06-04 15:12:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711411318] [2024-06-04 15:12:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711411318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:12:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145432577] [2024-06-04 15:12:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:12:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:12:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:12:45,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:45,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:45,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:45,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:45,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:46,047 INFO L124 PetriNetUnfolderBase]: 1581/2535 cut-off events. [2024-06-04 15:12:46,048 INFO L125 PetriNetUnfolderBase]: For 19100/19102 co-relation queries the response was YES. [2024-06-04 15:12:46,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10383 conditions, 2535 events. 1581/2535 cut-off events. For 19100/19102 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13379 event pairs, 510 based on Foata normal form. 24/2557 useless extension candidates. Maximal degree in co-relation 10352. Up to 2107 conditions per place. [2024-06-04 15:12:46,067 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-04 15:12:46,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 717 flow [2024-06-04 15:12:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:12:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:12:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-04 15:12:46,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-04 15:12:46,069 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 433 flow. Second operand 7 states and 151 transitions. [2024-06-04 15:12:46,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 717 flow [2024-06-04 15:12:46,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 687 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:46,085 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 481 flow [2024-06-04 15:12:46,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-06-04 15:12:46,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-04 15:12:46,086 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 481 flow [2024-06-04 15:12:46,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:46,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:46,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:46,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:12:46,087 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:46,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:46,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1260671089, now seen corresponding path program 1 times [2024-06-04 15:12:46,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:46,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665596201] [2024-06-04 15:12:46,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:46,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665596201] [2024-06-04 15:12:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665596201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:46,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:46,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761685252] [2024-06-04 15:12:46,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:46,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:47,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:47,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 481 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:47,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:47,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:47,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:47,527 INFO L124 PetriNetUnfolderBase]: 1616/2587 cut-off events. [2024-06-04 15:12:47,527 INFO L125 PetriNetUnfolderBase]: For 20350/20350 co-relation queries the response was YES. [2024-06-04 15:12:47,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10974 conditions, 2587 events. 1616/2587 cut-off events. For 20350/20350 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13591 event pairs, 587 based on Foata normal form. 1/2587 useless extension candidates. Maximal degree in co-relation 10941. Up to 2404 conditions per place. [2024-06-04 15:12:47,545 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 70 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-04 15:12:47,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 707 flow [2024-06-04 15:12:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-04 15:12:47,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-04 15:12:47,547 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 481 flow. Second operand 6 states and 118 transitions. [2024-06-04 15:12:47,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 707 flow [2024-06-04 15:12:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 653 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 15:12:47,569 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 487 flow [2024-06-04 15:12:47,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-06-04 15:12:47,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-04 15:12:47,571 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 487 flow [2024-06-04 15:12:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:47,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:47,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:47,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:12:47,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:47,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1165069012, now seen corresponding path program 1 times [2024-06-04 15:12:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:47,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461656923] [2024-06-04 15:12:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:47,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461656923] [2024-06-04 15:12:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461656923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:48,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:48,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:48,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102579534] [2024-06-04 15:12:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:48,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:48,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:48,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:48,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 487 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:48,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:48,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:48,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:49,648 INFO L124 PetriNetUnfolderBase]: 1644/2613 cut-off events. [2024-06-04 15:12:49,649 INFO L125 PetriNetUnfolderBase]: For 23360/23360 co-relation queries the response was YES. [2024-06-04 15:12:49,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11439 conditions, 2613 events. 1644/2613 cut-off events. For 23360/23360 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13661 event pairs, 546 based on Foata normal form. 4/2613 useless extension candidates. Maximal degree in co-relation 11405. Up to 2298 conditions per place. [2024-06-04 15:12:49,669 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 28 changer transitions 0/105 dead transitions. [2024-06-04 15:12:49,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 802 flow [2024-06-04 15:12:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-04 15:12:49,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-04 15:12:49,702 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 487 flow. Second operand 8 states and 163 transitions. [2024-06-04 15:12:49,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 802 flow [2024-06-04 15:12:49,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 764 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:49,718 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 575 flow [2024-06-04 15:12:49,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=575, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-06-04 15:12:49,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-04 15:12:49,719 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 575 flow [2024-06-04 15:12:49,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:49,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:49,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:49,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:12:49,720 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)] === [2024-06-04 15:12:49,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash 211935514, now seen corresponding path program 2 times [2024-06-04 15:12:49,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:49,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454765909] [2024-06-04 15:12:49,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:49,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454765909] [2024-06-04 15:12:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454765909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:51,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:51,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:51,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126197956] [2024-06-04 15:12:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:51,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:51,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:51,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:51,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 575 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:51,913 INFO L124 PetriNetUnfolderBase]: 1636/2604 cut-off events. [2024-06-04 15:12:51,913 INFO L125 PetriNetUnfolderBase]: For 26832/26832 co-relation queries the response was YES. [2024-06-04 15:12:51,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11965 conditions, 2604 events. 1636/2604 cut-off events. For 26832/26832 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13585 event pairs, 544 based on Foata normal form. 4/2604 useless extension candidates. Maximal degree in co-relation 11929. Up to 2286 conditions per place. [2024-06-04 15:12:51,933 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-04 15:12:51,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 112 transitions, 936 flow [2024-06-04 15:12:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-04 15:12:51,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-04 15:12:51,937 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 575 flow. Second operand 8 states and 163 transitions. [2024-06-04 15:12:51,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 112 transitions, 936 flow [2024-06-04 15:12:51,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 853 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 15:12:51,965 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 670 flow [2024-06-04 15:12:51,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=670, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-04 15:12:51,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-04 15:12:51,967 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 670 flow [2024-06-04 15:12:51,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:51,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:51,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:51,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:12:51,967 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)] === [2024-06-04 15:12:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1723195528, now seen corresponding path program 3 times [2024-06-04 15:12:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112459501] [2024-06-04 15:12:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:53,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:53,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112459501] [2024-06-04 15:12:53,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112459501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:53,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:53,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:12:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212344765] [2024-06-04 15:12:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:12:53,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:12:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:12:53,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:53,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 670 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:53,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:53,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:53,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:54,083 INFO L124 PetriNetUnfolderBase]: 1669/2670 cut-off events. [2024-06-04 15:12:54,084 INFO L125 PetriNetUnfolderBase]: For 30141/30141 co-relation queries the response was YES. [2024-06-04 15:12:54,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12526 conditions, 2670 events. 1669/2670 cut-off events. For 30141/30141 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14076 event pairs, 449 based on Foata normal form. 4/2670 useless extension candidates. Maximal degree in co-relation 12488. Up to 2176 conditions per place. [2024-06-04 15:12:54,103 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 41 changer transitions 0/119 dead transitions. [2024-06-04 15:12:54,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1010 flow [2024-06-04 15:12:54,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:12:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:12:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 15:12:54,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-04 15:12:54,108 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 670 flow. Second operand 8 states and 167 transitions. [2024-06-04 15:12:54,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1010 flow [2024-06-04 15:12:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 946 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 15:12:54,147 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 752 flow [2024-06-04 15:12:54,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=752, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-04 15:12:54,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-04 15:12:54,148 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 752 flow [2024-06-04 15:12:54,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:54,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:54,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:12:54,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:54,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -227985551, now seen corresponding path program 2 times [2024-06-04 15:12:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:54,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432137123] [2024-06-04 15:12:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432137123] [2024-06-04 15:12:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432137123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:54,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:54,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:54,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291112882] [2024-06-04 15:12:54,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:54,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:54,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:54,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:55,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:55,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 752 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:55,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:55,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:55,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:55,485 INFO L124 PetriNetUnfolderBase]: 1666/2685 cut-off events. [2024-06-04 15:12:55,485 INFO L125 PetriNetUnfolderBase]: For 33150/33158 co-relation queries the response was YES. [2024-06-04 15:12:55,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12823 conditions, 2685 events. 1666/2685 cut-off events. For 33150/33158 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14292 event pairs, 548 based on Foata normal form. 7/2690 useless extension candidates. Maximal degree in co-relation 12783. Up to 2484 conditions per place. [2024-06-04 15:12:55,500 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 79 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-06-04 15:12:55,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 1002 flow [2024-06-04 15:12:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-04 15:12:55,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:12:55,501 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 752 flow. Second operand 6 states and 114 transitions. [2024-06-04 15:12:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 1002 flow [2024-06-04 15:12:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 102 transitions, 912 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 15:12:55,530 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 744 flow [2024-06-04 15:12:55,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=744, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-06-04 15:12:55,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-04 15:12:55,531 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 744 flow [2024-06-04 15:12:55,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:12:55,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:55,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:55,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:12:55,532 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:55,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1254951217, now seen corresponding path program 1 times [2024-06-04 15:12:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:55,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323777465] [2024-06-04 15:12:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:56,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:56,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323777465] [2024-06-04 15:12:56,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323777465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:56,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:56,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:56,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854429992] [2024-06-04 15:12:56,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:56,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:56,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:56,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:56,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-04 15:12:56,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:56,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:56,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:56,754 INFO L124 PetriNetUnfolderBase]: 1506/2504 cut-off events. [2024-06-04 15:12:56,754 INFO L125 PetriNetUnfolderBase]: For 31762/31762 co-relation queries the response was YES. [2024-06-04 15:12:56,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11861 conditions, 2504 events. 1506/2504 cut-off events. For 31762/31762 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13700 event pairs, 473 based on Foata normal form. 2/2505 useless extension candidates. Maximal degree in co-relation 11820. Up to 2262 conditions per place. [2024-06-04 15:12:56,766 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 90 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2024-06-04 15:12:56,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 1006 flow [2024-06-04 15:12:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-04 15:12:56,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-04 15:12:56,769 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 744 flow. Second operand 6 states and 121 transitions. [2024-06-04 15:12:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 1006 flow [2024-06-04 15:12:56,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 946 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:56,793 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 742 flow [2024-06-04 15:12:56,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2024-06-04 15:12:56,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-04 15:12:56,794 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 742 flow [2024-06-04 15:12:56,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-04 15:12:56,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:56,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:12:56,794 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:56,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash -224128987, now seen corresponding path program 2 times [2024-06-04 15:12:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:56,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846906508] [2024-06-04 15:12:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:56,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:57,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:57,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846906508] [2024-06-04 15:12:57,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846906508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:57,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:57,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:12:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058694709] [2024-06-04 15:12:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:57,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:12:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:12:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:12:57,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:12:57,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-04 15:12:57,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:57,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:12:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:58,088 INFO L124 PetriNetUnfolderBase]: 1508/2510 cut-off events. [2024-06-04 15:12:58,088 INFO L125 PetriNetUnfolderBase]: For 34798/34800 co-relation queries the response was YES. [2024-06-04 15:12:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12274 conditions, 2510 events. 1508/2510 cut-off events. For 34798/34800 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13784 event pairs, 477 based on Foata normal form. 4/2513 useless extension candidates. Maximal degree in co-relation 12232. Up to 2256 conditions per place. [2024-06-04 15:12:58,101 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 86 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-04 15:12:58,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 1010 flow [2024-06-04 15:12:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:12:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:12:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-04 15:12:58,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-04 15:12:58,102 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 742 flow. Second operand 6 states and 121 transitions. [2024-06-04 15:12:58,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 1010 flow [2024-06-04 15:12:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 974 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:58,133 INFO L231 Difference]: Finished difference. Result has 97 places, 99 transitions, 780 flow [2024-06-04 15:12:58,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=97, PETRI_TRANSITIONS=99} [2024-06-04 15:12:58,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-04 15:12:58,134 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 99 transitions, 780 flow [2024-06-04 15:12:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-04 15:12:58,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:58,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:12:58,134 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)] === [2024-06-04 15:12:58,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash -224121051, now seen corresponding path program 1 times [2024-06-04 15:12:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899320182] [2024-06-04 15:12:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:58,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:12:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:12:59,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:12:59,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899320182] [2024-06-04 15:12:59,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899320182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:12:59,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:12:59,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:12:59,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909532023] [2024-06-04 15:12:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:12:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:12:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:12:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:12:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:12:59,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:12:59,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 99 transitions, 780 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:12:59,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:12:59,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:12:59,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:12:59,623 INFO L124 PetriNetUnfolderBase]: 1590/2590 cut-off events. [2024-06-04 15:12:59,623 INFO L125 PetriNetUnfolderBase]: For 37624/37624 co-relation queries the response was YES. [2024-06-04 15:12:59,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2590 events. 1590/2590 cut-off events. For 37624/37624 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13862 event pairs, 500 based on Foata normal form. 1/2590 useless extension candidates. Maximal degree in co-relation 12987. Up to 2426 conditions per place. [2024-06-04 15:12:59,635 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 92 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-04 15:12:59,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 112 transitions, 1052 flow [2024-06-04 15:12:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:12:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:12:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:12:59,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-04 15:12:59,637 INFO L175 Difference]: Start difference. First operand has 97 places, 99 transitions, 780 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:12:59,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 112 transitions, 1052 flow [2024-06-04 15:12:59,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 112 transitions, 1000 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:12:59,664 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 804 flow [2024-06-04 15:12:59,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=804, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2024-06-04 15:12:59,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-04 15:12:59,665 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 804 flow [2024-06-04 15:12:59,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:12:59,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:12:59,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:12:59,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:12:59,665 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:12:59,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:12:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1629777369, now seen corresponding path program 1 times [2024-06-04 15:12:59,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:12:59,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818675960] [2024-06-04 15:12:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:12:59,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:12:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:00,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818675960] [2024-06-04 15:13:00,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818675960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:00,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:00,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:00,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401775162] [2024-06-04 15:13:00,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:00,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:00,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:00,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:00,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:00,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 804 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:00,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:00,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:00,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:01,044 INFO L124 PetriNetUnfolderBase]: 1687/2722 cut-off events. [2024-06-04 15:13:01,044 INFO L125 PetriNetUnfolderBase]: For 48380/48382 co-relation queries the response was YES. [2024-06-04 15:13:01,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14456 conditions, 2722 events. 1687/2722 cut-off events. For 48380/48382 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14549 event pairs, 536 based on Foata normal form. 5/2726 useless extension candidates. Maximal degree in co-relation 14412. Up to 2449 conditions per place. [2024-06-04 15:13:01,060 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-06-04 15:13:01,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 132 transitions, 1180 flow [2024-06-04 15:13:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-04 15:13:01,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-04 15:13:01,061 INFO L175 Difference]: Start difference. First operand has 100 places, 102 transitions, 804 flow. Second operand 7 states and 145 transitions. [2024-06-04 15:13:01,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 132 transitions, 1180 flow [2024-06-04 15:13:01,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 132 transitions, 1126 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:01,095 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 890 flow [2024-06-04 15:13:01,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-06-04 15:13:01,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-04 15:13:01,096 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 890 flow [2024-06-04 15:13:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:01,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:01,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:01,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:13:01,097 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)] === [2024-06-04 15:13:01,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash 838259714, now seen corresponding path program 1 times [2024-06-04 15:13:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:01,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104172599] [2024-06-04 15:13:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:02,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:02,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104172599] [2024-06-04 15:13:02,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104172599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:02,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:02,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:02,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257552564] [2024-06-04 15:13:02,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:02,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:02,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:02,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:02,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:02,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 890 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:02,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:02,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:02,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:02,953 INFO L124 PetriNetUnfolderBase]: 1797/2921 cut-off events. [2024-06-04 15:13:02,954 INFO L125 PetriNetUnfolderBase]: For 55294/55296 co-relation queries the response was YES. [2024-06-04 15:13:02,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15970 conditions, 2921 events. 1797/2921 cut-off events. For 55294/55296 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16069 event pairs, 546 based on Foata normal form. 12/2931 useless extension candidates. Maximal degree in co-relation 15924. Up to 2271 conditions per place. [2024-06-04 15:13:02,969 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 37 changer transitions 0/147 dead transitions. [2024-06-04 15:13:02,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 147 transitions, 1320 flow [2024-06-04 15:13:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:02,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:02,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 15:13:02,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 15:13:02,971 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 890 flow. Second operand 8 states and 168 transitions. [2024-06-04 15:13:02,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 147 transitions, 1320 flow [2024-06-04 15:13:03,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1250 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:03,005 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 969 flow [2024-06-04 15:13:03,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-06-04 15:13:03,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-04 15:13:03,006 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 969 flow [2024-06-04 15:13:03,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:03,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:03,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:03,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:13:03,007 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:03,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:03,007 INFO L85 PathProgramCache]: Analyzing trace with hash -426097157, now seen corresponding path program 1 times [2024-06-04 15:13:03,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:03,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162908125] [2024-06-04 15:13:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:03,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:03,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162908125] [2024-06-04 15:13:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162908125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:03,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:03,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:03,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831187521] [2024-06-04 15:13:03,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:03,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:03,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:03,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:03,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 969 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) [2024-06-04 15:13:03,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:03,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:03,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:04,410 INFO L124 PetriNetUnfolderBase]: 1887/3013 cut-off events. [2024-06-04 15:13:04,410 INFO L125 PetriNetUnfolderBase]: For 58345/58345 co-relation queries the response was YES. [2024-06-04 15:13:04,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16789 conditions, 3013 events. 1887/3013 cut-off events. For 58345/58345 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16241 event pairs, 584 based on Foata normal form. 1/3013 useless extension candidates. Maximal degree in co-relation 16742. Up to 2868 conditions per place. [2024-06-04 15:13:04,427 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 114 selfloop transitions, 14 changer transitions 0/133 dead transitions. [2024-06-04 15:13:04,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 133 transitions, 1309 flow [2024-06-04 15:13:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:04,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 15:13:04,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-04 15:13:04,428 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 969 flow. Second operand 7 states and 127 transitions. [2024-06-04 15:13:04,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 133 transitions, 1309 flow [2024-06-04 15:13:04,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 133 transitions, 1258 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:04,463 INFO L231 Difference]: Finished difference. Result has 112 places, 117 transitions, 1002 flow [2024-06-04 15:13:04,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=112, PETRI_TRANSITIONS=117} [2024-06-04 15:13:04,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-04 15:13:04,464 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 117 transitions, 1002 flow [2024-06-04 15:13:04,464 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) [2024-06-04 15:13:04,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:04,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:04,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:13:04,464 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:04,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash -83798939, now seen corresponding path program 2 times [2024-06-04 15:13:04,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:04,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143075698] [2024-06-04 15:13:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:04,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:05,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:05,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143075698] [2024-06-04 15:13:05,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143075698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:05,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:05,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:05,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768047322] [2024-06-04 15:13:05,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:05,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:05,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:05,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:05,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:05,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 117 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:05,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:05,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:05,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:05,862 INFO L124 PetriNetUnfolderBase]: 1863/3024 cut-off events. [2024-06-04 15:13:05,863 INFO L125 PetriNetUnfolderBase]: For 65028/65030 co-relation queries the response was YES. [2024-06-04 15:13:05,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17292 conditions, 3024 events. 1863/3024 cut-off events. For 65028/65030 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16749 event pairs, 561 based on Foata normal form. 5/3028 useless extension candidates. Maximal degree in co-relation 17244. Up to 2677 conditions per place. [2024-06-04 15:13:05,892 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2024-06-04 15:13:05,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1482 flow [2024-06-04 15:13:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-04 15:13:05,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-04 15:13:05,894 INFO L175 Difference]: Start difference. First operand has 112 places, 117 transitions, 1002 flow. Second operand 7 states and 142 transitions. [2024-06-04 15:13:05,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1482 flow [2024-06-04 15:13:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 144 transitions, 1420 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:05,962 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1134 flow [2024-06-04 15:13:05,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-04 15:13:05,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-04 15:13:05,963 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1134 flow [2024-06-04 15:13:05,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:05,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:05,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:05,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:13:05,964 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)] === [2024-06-04 15:13:05,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash 26860728, now seen corresponding path program 2 times [2024-06-04 15:13:05,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:05,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060636131] [2024-06-04 15:13:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:05,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:07,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060636131] [2024-06-04 15:13:07,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060636131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:07,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:07,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:07,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197040857] [2024-06-04 15:13:07,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:07,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:07,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:07,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:07,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:07,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:07,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1134 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:07,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:07,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:07,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:07,823 INFO L124 PetriNetUnfolderBase]: 1843/2991 cut-off events. [2024-06-04 15:13:07,823 INFO L125 PetriNetUnfolderBase]: For 72190/72192 co-relation queries the response was YES. [2024-06-04 15:13:07,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17812 conditions, 2991 events. 1843/2991 cut-off events. For 72190/72192 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16497 event pairs, 347 based on Foata normal form. 12/3001 useless extension candidates. Maximal degree in co-relation 17762. Up to 1909 conditions per place. [2024-06-04 15:13:07,842 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 107 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-04 15:13:07,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 1528 flow [2024-06-04 15:13:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-04 15:13:07,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016611295681063 [2024-06-04 15:13:07,844 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1134 flow. Second operand 7 states and 151 transitions. [2024-06-04 15:13:07,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 1528 flow [2024-06-04 15:13:07,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 1451 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:07,902 INFO L231 Difference]: Finished difference. Result has 119 places, 125 transitions, 1146 flow [2024-06-04 15:13:07,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=119, PETRI_TRANSITIONS=125} [2024-06-04 15:13:07,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-04 15:13:07,903 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 125 transitions, 1146 flow [2024-06-04 15:13:07,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:07,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:07,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:07,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:13:07,904 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)] === [2024-06-04 15:13:07,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1540079290, now seen corresponding path program 3 times [2024-06-04 15:13:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:07,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540064460] [2024-06-04 15:13:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540064460] [2024-06-04 15:13:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540064460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:08,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:08,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:08,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989426121] [2024-06-04 15:13:08,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:08,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:08,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:08,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:09,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:09,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 125 transitions, 1146 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:09,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:09,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:09,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:09,527 INFO L124 PetriNetUnfolderBase]: 1823/2960 cut-off events. [2024-06-04 15:13:09,527 INFO L125 PetriNetUnfolderBase]: For 74636/74638 co-relation queries the response was YES. [2024-06-04 15:13:09,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17771 conditions, 2960 events. 1823/2960 cut-off events. For 74636/74638 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16364 event pairs, 310 based on Foata normal form. 12/2967 useless extension candidates. Maximal degree in co-relation 17719. Up to 1767 conditions per place. [2024-06-04 15:13:09,548 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 102 selfloop transitions, 39 changer transitions 0/149 dead transitions. [2024-06-04 15:13:09,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1482 flow [2024-06-04 15:13:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-04 15:13:09,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-04 15:13:09,549 INFO L175 Difference]: Start difference. First operand has 119 places, 125 transitions, 1146 flow. Second operand 7 states and 143 transitions. [2024-06-04 15:13:09,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1482 flow [2024-06-04 15:13:09,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 149 transitions, 1378 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:09,607 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1092 flow [2024-06-04 15:13:09,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-06-04 15:13:09,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-04 15:13:09,608 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1092 flow [2024-06-04 15:13:09,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:09,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:09,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:09,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:13:09,609 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)] === [2024-06-04 15:13:09,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash -71834117, now seen corresponding path program 2 times [2024-06-04 15:13:09,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:09,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237013481] [2024-06-04 15:13:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:09,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237013481] [2024-06-04 15:13:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237013481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290253575] [2024-06-04 15:13:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:10,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:10,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:10,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:10,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:10,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1092 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) [2024-06-04 15:13:10,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:10,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:10,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:10,861 INFO L124 PetriNetUnfolderBase]: 1903/3043 cut-off events. [2024-06-04 15:13:10,861 INFO L125 PetriNetUnfolderBase]: For 71231/71241 co-relation queries the response was YES. [2024-06-04 15:13:10,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 3043 events. 1903/3043 cut-off events. For 71231/71241 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16510 event pairs, 569 based on Foata normal form. 9/3050 useless extension candidates. Maximal degree in co-relation 18041. Up to 2866 conditions per place. [2024-06-04 15:13:10,880 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 110 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-04 15:13:10,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 141 transitions, 1548 flow [2024-06-04 15:13:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-04 15:13:10,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-04 15:13:10,881 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1092 flow. Second operand 7 states and 125 transitions. [2024-06-04 15:13:10,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 141 transitions, 1548 flow [2024-06-04 15:13:10,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 1437 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:10,920 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 1153 flow [2024-06-04 15:13:10,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1153, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-06-04 15:13:10,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-04 15:13:10,921 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 1153 flow [2024-06-04 15:13:10,921 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) [2024-06-04 15:13:10,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:10,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:10,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:13:10,921 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:10,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:10,921 INFO L85 PathProgramCache]: Analyzing trace with hash -71834489, now seen corresponding path program 3 times [2024-06-04 15:13:10,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:10,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662516349] [2024-06-04 15:13:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:10,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662516349] [2024-06-04 15:13:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662516349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:11,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:11,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676743428] [2024-06-04 15:13:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:11,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:11,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 1153 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:11,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:11,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:11,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:12,220 INFO L124 PetriNetUnfolderBase]: 1855/3012 cut-off events. [2024-06-04 15:13:12,220 INFO L125 PetriNetUnfolderBase]: For 78024/78026 co-relation queries the response was YES. [2024-06-04 15:13:12,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18053 conditions, 3012 events. 1855/3012 cut-off events. For 78024/78026 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16674 event pairs, 566 based on Foata normal form. 5/3013 useless extension candidates. Maximal degree in co-relation 18000. Up to 2598 conditions per place. [2024-06-04 15:13:12,238 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 101 selfloop transitions, 42 changer transitions 0/153 dead transitions. [2024-06-04 15:13:12,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 153 transitions, 1719 flow [2024-06-04 15:13:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-04 15:13:12,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-04 15:13:12,239 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 1153 flow. Second operand 7 states and 140 transitions. [2024-06-04 15:13:12,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 153 transitions, 1719 flow [2024-06-04 15:13:12,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1647 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:12,292 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 1317 flow [2024-06-04 15:13:12,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-04 15:13:12,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-04 15:13:12,293 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 1317 flow [2024-06-04 15:13:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:12,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:13:12,294 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:12,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -71418407, now seen corresponding path program 3 times [2024-06-04 15:13:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295013936] [2024-06-04 15:13:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:13,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295013936] [2024-06-04 15:13:13,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295013936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:13,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:13,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:13,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999943698] [2024-06-04 15:13:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:13,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:13,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:13,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:13,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 1317 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) [2024-06-04 15:13:13,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:13,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:13,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:13,616 INFO L124 PetriNetUnfolderBase]: 1927/3083 cut-off events. [2024-06-04 15:13:13,616 INFO L125 PetriNetUnfolderBase]: For 84629/84639 co-relation queries the response was YES. [2024-06-04 15:13:13,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19253 conditions, 3083 events. 1927/3083 cut-off events. For 84629/84639 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16732 event pairs, 575 based on Foata normal form. 9/3090 useless extension candidates. Maximal degree in co-relation 19197. Up to 2901 conditions per place. [2024-06-04 15:13:13,639 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 116 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-04 15:13:13,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 148 transitions, 1627 flow [2024-06-04 15:13:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 15:13:13,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-04 15:13:13,641 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 1317 flow. Second operand 7 states and 123 transitions. [2024-06-04 15:13:13,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 148 transitions, 1627 flow [2024-06-04 15:13:13,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 148 transitions, 1453 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:13,711 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1203 flow [2024-06-04 15:13:13,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1203, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-04 15:13:13,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-04 15:13:13,713 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1203 flow [2024-06-04 15:13:13,713 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) [2024-06-04 15:13:13,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:13,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:13,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:13:13,714 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:13,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:13,714 INFO L85 PathProgramCache]: Analyzing trace with hash -248901281, now seen corresponding path program 1 times [2024-06-04 15:13:13,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:13,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260901365] [2024-06-04 15:13:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:13,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260901365] [2024-06-04 15:13:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260901365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:14,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:14,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:14,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957670083] [2024-06-04 15:13:14,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:14,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:14,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:13:14,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1203 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:14,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:14,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:13:14,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:15,319 INFO L124 PetriNetUnfolderBase]: 1663/2810 cut-off events. [2024-06-04 15:13:15,319 INFO L125 PetriNetUnfolderBase]: For 75216/75216 co-relation queries the response was YES. [2024-06-04 15:13:15,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16626 conditions, 2810 events. 1663/2810 cut-off events. For 75216/75216 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16100 event pairs, 459 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 16569. Up to 2500 conditions per place. [2024-06-04 15:13:15,335 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 132 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-06-04 15:13:15,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 157 transitions, 1581 flow [2024-06-04 15:13:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:13:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-04 15:13:15,336 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1203 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:13:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 157 transitions, 1581 flow [2024-06-04 15:13:15,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 157 transitions, 1519 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:15,385 INFO L231 Difference]: Finished difference. Result has 129 places, 141 transitions, 1227 flow [2024-06-04 15:13:15,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1227, PETRI_PLACES=129, PETRI_TRANSITIONS=141} [2024-06-04 15:13:15,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-04 15:13:15,386 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 141 transitions, 1227 flow [2024-06-04 15:13:15,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:15,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:15,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:15,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:13:15,387 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:15,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash -248781125, now seen corresponding path program 1 times [2024-06-04 15:13:15,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:15,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276541445] [2024-06-04 15:13:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:15,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:16,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:16,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276541445] [2024-06-04 15:13:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276541445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:16,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:16,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121657020] [2024-06-04 15:13:16,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:16,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:16,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:16,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:16,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:16,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 141 transitions, 1227 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:16,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:16,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:16,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:16,807 INFO L124 PetriNetUnfolderBase]: 1767/2920 cut-off events. [2024-06-04 15:13:16,807 INFO L125 PetriNetUnfolderBase]: For 80379/80379 co-relation queries the response was YES. [2024-06-04 15:13:16,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17530 conditions, 2920 events. 1767/2920 cut-off events. For 80379/80379 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16381 event pairs, 498 based on Foata normal form. 2/2921 useless extension candidates. Maximal degree in co-relation 17472. Up to 2683 conditions per place. [2024-06-04 15:13:16,826 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 14 changer transitions 0/159 dead transitions. [2024-06-04 15:13:16,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 159 transitions, 1623 flow [2024-06-04 15:13:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 15:13:16,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-04 15:13:16,828 INFO L175 Difference]: Start difference. First operand has 129 places, 141 transitions, 1227 flow. Second operand 7 states and 131 transitions. [2024-06-04 15:13:16,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 159 transitions, 1623 flow [2024-06-04 15:13:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 159 transitions, 1559 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:16,879 INFO L231 Difference]: Finished difference. Result has 131 places, 144 transitions, 1245 flow [2024-06-04 15:13:16,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=131, PETRI_TRANSITIONS=144} [2024-06-04 15:13:16,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-04 15:13:16,880 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 144 transitions, 1245 flow [2024-06-04 15:13:16,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:16,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:16,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:16,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:13:16,881 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1641936933, now seen corresponding path program 2 times [2024-06-04 15:13:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331588315] [2024-06-04 15:13:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:17,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:17,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331588315] [2024-06-04 15:13:17,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331588315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:17,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:17,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937947633] [2024-06-04 15:13:17,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:17,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:17,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:17,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:17,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:17,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:17,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 144 transitions, 1245 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:17,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:17,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:17,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:18,169 INFO L124 PetriNetUnfolderBase]: 1785/2930 cut-off events. [2024-06-04 15:13:18,170 INFO L125 PetriNetUnfolderBase]: For 83861/83863 co-relation queries the response was YES. [2024-06-04 15:13:18,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18138 conditions, 2930 events. 1785/2930 cut-off events. For 83861/83863 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16288 event pairs, 505 based on Foata normal form. 4/2933 useless extension candidates. Maximal degree in co-relation 18079. Up to 2679 conditions per place. [2024-06-04 15:13:18,190 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 26 changer transitions 0/164 dead transitions. [2024-06-04 15:13:18,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 164 transitions, 1767 flow [2024-06-04 15:13:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 15:13:18,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-04 15:13:18,191 INFO L175 Difference]: Start difference. First operand has 131 places, 144 transitions, 1245 flow. Second operand 7 states and 134 transitions. [2024-06-04 15:13:18,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 164 transitions, 1767 flow [2024-06-04 15:13:18,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 164 transitions, 1707 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:18,255 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1345 flow [2024-06-04 15:13:18,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-04 15:13:18,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-04 15:13:18,255 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1345 flow [2024-06-04 15:13:18,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:18,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:18,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:18,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:13:18,256 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:18,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:18,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1642174083, now seen corresponding path program 3 times [2024-06-04 15:13:18,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:18,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124128511] [2024-06-04 15:13:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:19,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:19,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124128511] [2024-06-04 15:13:19,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124128511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:19,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:19,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:19,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201560445] [2024-06-04 15:13:19,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:19,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:19,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:19,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1345 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:19,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:19,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:19,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:19,492 INFO L124 PetriNetUnfolderBase]: 1779/2922 cut-off events. [2024-06-04 15:13:19,492 INFO L125 PetriNetUnfolderBase]: For 88858/88860 co-relation queries the response was YES. [2024-06-04 15:13:19,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18432 conditions, 2922 events. 1779/2922 cut-off events. For 88858/88860 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16280 event pairs, 502 based on Foata normal form. 4/2925 useless extension candidates. Maximal degree in co-relation 18372. Up to 2674 conditions per place. [2024-06-04 15:13:19,562 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-04 15:13:19,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 163 transitions, 1707 flow [2024-06-04 15:13:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 15:13:19,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-04 15:13:19,563 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1345 flow. Second operand 7 states and 132 transitions. [2024-06-04 15:13:19,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 163 transitions, 1707 flow [2024-06-04 15:13:19,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 163 transitions, 1609 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:19,621 INFO L231 Difference]: Finished difference. Result has 137 places, 150 transitions, 1307 flow [2024-06-04 15:13:19,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=137, PETRI_TRANSITIONS=150} [2024-06-04 15:13:19,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-04 15:13:19,621 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 150 transitions, 1307 flow [2024-06-04 15:13:19,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:19,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:19,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:19,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:13:19,622 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:19,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash -333375003, now seen corresponding path program 1 times [2024-06-04 15:13:19,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:19,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318752653] [2024-06-04 15:13:19,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:20,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318752653] [2024-06-04 15:13:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318752653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:20,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715733793] [2024-06-04 15:13:20,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:20,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:20,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:20,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 150 transitions, 1307 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) [2024-06-04 15:13:20,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:20,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:20,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:21,106 INFO L124 PetriNetUnfolderBase]: 1961/3134 cut-off events. [2024-06-04 15:13:21,106 INFO L125 PetriNetUnfolderBase]: For 111140/111142 co-relation queries the response was YES. [2024-06-04 15:13:21,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20571 conditions, 3134 events. 1961/3134 cut-off events. For 111140/111142 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17104 event pairs, 573 based on Foata normal form. 5/3138 useless extension candidates. Maximal degree in co-relation 20509. Up to 2885 conditions per place. [2024-06-04 15:13:21,129 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 28 changer transitions 0/179 dead transitions. [2024-06-04 15:13:21,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 179 transitions, 1797 flow [2024-06-04 15:13:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:13:21,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:13:21,131 INFO L175 Difference]: Start difference. First operand has 137 places, 150 transitions, 1307 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:13:21,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 179 transitions, 1797 flow [2024-06-04 15:13:21,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 179 transitions, 1733 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:21,199 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1382 flow [2024-06-04 15:13:21,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1382, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2024-06-04 15:13:21,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-04 15:13:21,199 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1382 flow [2024-06-04 15:13:21,200 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) [2024-06-04 15:13:21,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:21,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:21,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:13:21,200 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)] === [2024-06-04 15:13:21,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash -329830866, now seen corresponding path program 1 times [2024-06-04 15:13:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:21,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086034441] [2024-06-04 15:13:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:21,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086034441] [2024-06-04 15:13:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086034441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:22,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901123505] [2024-06-04 15:13:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:22,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:22,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:22,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1382 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:22,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:22,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:22,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:22,658 INFO L124 PetriNetUnfolderBase]: 1924/3109 cut-off events. [2024-06-04 15:13:22,658 INFO L125 PetriNetUnfolderBase]: For 120771/120773 co-relation queries the response was YES. [2024-06-04 15:13:22,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21225 conditions, 3109 events. 1924/3109 cut-off events. For 120771/120773 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17251 event pairs, 547 based on Foata normal form. 6/3114 useless extension candidates. Maximal degree in co-relation 21162. Up to 2774 conditions per place. [2024-06-04 15:13:22,683 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 23 changer transitions 0/178 dead transitions. [2024-06-04 15:13:22,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 178 transitions, 1823 flow [2024-06-04 15:13:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-04 15:13:22,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-04 15:13:22,684 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1382 flow. Second operand 7 states and 141 transitions. [2024-06-04 15:13:22,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 178 transitions, 1823 flow [2024-06-04 15:13:22,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 178 transitions, 1712 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:22,768 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1389 flow [2024-06-04 15:13:22,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-04 15:13:22,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-04 15:13:22,768 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1389 flow [2024-06-04 15:13:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:22,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:22,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:22,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:13:22,769 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)] === [2024-06-04 15:13:22,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash -324116946, now seen corresponding path program 2 times [2024-06-04 15:13:22,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:22,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738128175] [2024-06-04 15:13:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:22,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738128175] [2024-06-04 15:13:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738128175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113211011] [2024-06-04 15:13:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:23,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:23,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1389 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:23,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:23,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:23,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:24,171 INFO L124 PetriNetUnfolderBase]: 1926/3117 cut-off events. [2024-06-04 15:13:24,171 INFO L125 PetriNetUnfolderBase]: For 125710/125712 co-relation queries the response was YES. [2024-06-04 15:13:24,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3117 events. 1926/3117 cut-off events. For 125710/125712 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17375 event pairs, 546 based on Foata normal form. 6/3122 useless extension candidates. Maximal degree in co-relation 21284. Up to 2723 conditions per place. [2024-06-04 15:13:24,193 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 131 selfloop transitions, 35 changer transitions 0/180 dead transitions. [2024-06-04 15:13:24,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 180 transitions, 1903 flow [2024-06-04 15:13:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-04 15:13:24,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-04 15:13:24,194 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1389 flow. Second operand 7 states and 141 transitions. [2024-06-04 15:13:24,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 180 transitions, 1903 flow [2024-06-04 15:13:24,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 180 transitions, 1841 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:24,284 INFO L231 Difference]: Finished difference. Result has 144 places, 161 transitions, 1464 flow [2024-06-04 15:13:24,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1464, PETRI_PLACES=144, PETRI_TRANSITIONS=161} [2024-06-04 15:13:24,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-04 15:13:24,285 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 161 transitions, 1464 flow [2024-06-04 15:13:24,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:24,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:24,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:24,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:13:24,286 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)] === [2024-06-04 15:13:24,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:24,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2079825596, now seen corresponding path program 1 times [2024-06-04 15:13:24,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:24,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643887204] [2024-06-04 15:13:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:24,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:25,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:25,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643887204] [2024-06-04 15:13:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643887204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:25,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:25,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:25,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870536791] [2024-06-04 15:13:25,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:25,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:25,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:25,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 161 transitions, 1464 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) [2024-06-04 15:13:25,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:25,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:25,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:25,722 INFO L124 PetriNetUnfolderBase]: 1990/3180 cut-off events. [2024-06-04 15:13:25,722 INFO L125 PetriNetUnfolderBase]: For 129180/129180 co-relation queries the response was YES. [2024-06-04 15:13:25,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21828 conditions, 3180 events. 1990/3180 cut-off events. For 129180/129180 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17398 event pairs, 567 based on Foata normal form. 1/3180 useless extension candidates. Maximal degree in co-relation 21763. Up to 3002 conditions per place. [2024-06-04 15:13:25,747 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-06-04 15:13:25,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 181 transitions, 1918 flow [2024-06-04 15:13:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:13:25,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-04 15:13:25,748 INFO L175 Difference]: Start difference. First operand has 144 places, 161 transitions, 1464 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:13:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 181 transitions, 1918 flow [2024-06-04 15:13:25,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 181 transitions, 1831 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:25,842 INFO L231 Difference]: Finished difference. Result has 148 places, 164 transitions, 1483 flow [2024-06-04 15:13:25,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=148, PETRI_TRANSITIONS=164} [2024-06-04 15:13:25,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-04 15:13:25,843 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 164 transitions, 1483 flow [2024-06-04 15:13:25,843 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) [2024-06-04 15:13:25,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:25,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:25,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:13:25,844 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:25,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:25,844 INFO L85 PathProgramCache]: Analyzing trace with hash -324109413, now seen corresponding path program 2 times [2024-06-04 15:13:25,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:25,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821074863] [2024-06-04 15:13:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821074863] [2024-06-04 15:13:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821074863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:26,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012547712] [2024-06-04 15:13:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:26,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:26,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 164 transitions, 1483 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) [2024-06-04 15:13:26,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:26,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:26,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:27,292 INFO L124 PetriNetUnfolderBase]: 2049/3269 cut-off events. [2024-06-04 15:13:27,292 INFO L125 PetriNetUnfolderBase]: For 138018/138020 co-relation queries the response was YES. [2024-06-04 15:13:27,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 3269 events. 2049/3269 cut-off events. For 138018/138020 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17916 event pairs, 561 based on Foata normal form. 5/3273 useless extension candidates. Maximal degree in co-relation 22811. Up to 2876 conditions per place. [2024-06-04 15:13:27,373 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2024-06-04 15:13:27,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 195 transitions, 2261 flow [2024-06-04 15:13:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:13:27,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-04 15:13:27,374 INFO L175 Difference]: Start difference. First operand has 148 places, 164 transitions, 1483 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:13:27,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 195 transitions, 2261 flow [2024-06-04 15:13:27,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 195 transitions, 2177 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:27,472 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 1671 flow [2024-06-04 15:13:27,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1671, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-06-04 15:13:27,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-04 15:13:27,472 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 1671 flow [2024-06-04 15:13:27,472 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) [2024-06-04 15:13:27,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:27,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:27,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:13:27,473 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:27,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:27,473 INFO L85 PathProgramCache]: Analyzing trace with hash -324120573, now seen corresponding path program 3 times [2024-06-04 15:13:27,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:27,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542588736] [2024-06-04 15:13:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:27,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:28,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542588736] [2024-06-04 15:13:28,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542588736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:28,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:28,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989810545] [2024-06-04 15:13:28,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:28,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:28,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 1671 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) [2024-06-04 15:13:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:29,117 INFO L124 PetriNetUnfolderBase]: 2060/3287 cut-off events. [2024-06-04 15:13:29,117 INFO L125 PetriNetUnfolderBase]: For 148932/148934 co-relation queries the response was YES. [2024-06-04 15:13:29,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23903 conditions, 3287 events. 2060/3287 cut-off events. For 148932/148934 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18091 event pairs, 566 based on Foata normal form. 5/3291 useless extension candidates. Maximal degree in co-relation 23835. Up to 2889 conditions per place. [2024-06-04 15:13:29,160 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 144 selfloop transitions, 48 changer transitions 0/197 dead transitions. [2024-06-04 15:13:29,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 197 transitions, 2286 flow [2024-06-04 15:13:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:13:29,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-04 15:13:29,168 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 1671 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:13:29,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 197 transitions, 2286 flow [2024-06-04 15:13:29,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 197 transitions, 2148 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:29,283 INFO L231 Difference]: Finished difference. Result has 155 places, 176 transitions, 1727 flow [2024-06-04 15:13:29,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1727, PETRI_PLACES=155, PETRI_TRANSITIONS=176} [2024-06-04 15:13:29,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-04 15:13:29,284 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 176 transitions, 1727 flow [2024-06-04 15:13:29,284 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) [2024-06-04 15:13:29,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:29,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 15:13:29,285 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:29,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2090526246, now seen corresponding path program 3 times [2024-06-04 15:13:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:29,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769919645] [2024-06-04 15:13:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:29,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:29,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:29,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769919645] [2024-06-04 15:13:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769919645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:29,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718574484] [2024-06-04 15:13:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:29,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:29,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:29,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:30,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:30,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 176 transitions, 1727 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:30,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:30,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:30,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:30,601 INFO L124 PetriNetUnfolderBase]: 1988/3200 cut-off events. [2024-06-04 15:13:30,601 INFO L125 PetriNetUnfolderBase]: For 154540/154540 co-relation queries the response was YES. [2024-06-04 15:13:30,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23638 conditions, 3200 events. 1988/3200 cut-off events. For 154540/154540 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17718 event pairs, 572 based on Foata normal form. 2/3198 useless extension candidates. Maximal degree in co-relation 23568. Up to 2844 conditions per place. [2024-06-04 15:13:30,628 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-06-04 15:13:30,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 193 transitions, 2127 flow [2024-06-04 15:13:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:13:30,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-04 15:13:30,629 INFO L175 Difference]: Start difference. First operand has 155 places, 176 transitions, 1727 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:13:30,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 193 transitions, 2127 flow [2024-06-04 15:13:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 193 transitions, 1977 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:30,748 INFO L231 Difference]: Finished difference. Result has 157 places, 176 transitions, 1629 flow [2024-06-04 15:13:30,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1629, PETRI_PLACES=157, PETRI_TRANSITIONS=176} [2024-06-04 15:13:30,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-04 15:13:30,749 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 176 transitions, 1629 flow [2024-06-04 15:13:30,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:30,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:30,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 15:13:30,749 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1525577038, now seen corresponding path program 4 times [2024-06-04 15:13:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:30,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116064309] [2024-06-04 15:13:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116064309] [2024-06-04 15:13:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116064309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:31,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086127993] [2024-06-04 15:13:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:31,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:31,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:31,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 176 transitions, 1629 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:31,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:31,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:31,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:32,052 INFO L124 PetriNetUnfolderBase]: 2013/3237 cut-off events. [2024-06-04 15:13:32,053 INFO L125 PetriNetUnfolderBase]: For 163458/163474 co-relation queries the response was YES. [2024-06-04 15:13:32,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23969 conditions, 3237 events. 2013/3237 cut-off events. For 163458/163474 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18088 event pairs, 558 based on Foata normal form. 2/3220 useless extension candidates. Maximal degree in co-relation 23898. Up to 2853 conditions per place. [2024-06-04 15:13:32,080 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 145 selfloop transitions, 32 changer transitions 0/194 dead transitions. [2024-06-04 15:13:32,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 194 transitions, 2083 flow [2024-06-04 15:13:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-04 15:13:32,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-04 15:13:32,081 INFO L175 Difference]: Start difference. First operand has 157 places, 176 transitions, 1629 flow. Second operand 7 states and 138 transitions. [2024-06-04 15:13:32,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 194 transitions, 2083 flow [2024-06-04 15:13:32,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 194 transitions, 1945 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 15:13:32,170 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1619 flow [2024-06-04 15:13:32,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1619, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2024-06-04 15:13:32,171 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-04 15:13:32,171 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1619 flow [2024-06-04 15:13:32,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:32,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:32,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:32,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 15:13:32,171 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:32,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2068102702, now seen corresponding path program 5 times [2024-06-04 15:13:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069519879] [2024-06-04 15:13:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:32,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:32,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069519879] [2024-06-04 15:13:32,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069519879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:32,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:32,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:32,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802113547] [2024-06-04 15:13:32,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:32,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:33,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:33,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 1619 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:33,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:33,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:33,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:33,559 INFO L124 PetriNetUnfolderBase]: 2011/3249 cut-off events. [2024-06-04 15:13:33,559 INFO L125 PetriNetUnfolderBase]: For 170314/170332 co-relation queries the response was YES. [2024-06-04 15:13:33,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24092 conditions, 3249 events. 2011/3249 cut-off events. For 170314/170332 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18305 event pairs, 567 based on Foata normal form. 6/3236 useless extension candidates. Maximal degree in co-relation 24020. Up to 2757 conditions per place. [2024-06-04 15:13:33,587 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 51 changer transitions 0/196 dead transitions. [2024-06-04 15:13:33,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 2165 flow [2024-06-04 15:13:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 15:13:33,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-04 15:13:33,588 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1619 flow. Second operand 7 states and 139 transitions. [2024-06-04 15:13:33,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 2165 flow [2024-06-04 15:13:33,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 196 transitions, 2069 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:33,708 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 1693 flow [2024-06-04 15:13:33,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-06-04 15:13:33,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-04 15:13:33,709 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 1693 flow [2024-06-04 15:13:33,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:33,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:33,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:33,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 15:13:33,714 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:33,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash -639575548, now seen corresponding path program 6 times [2024-06-04 15:13:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:33,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038612356] [2024-06-04 15:13:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:33,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:33,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:34,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:34,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038612356] [2024-06-04 15:13:34,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038612356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:34,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:34,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64700723] [2024-06-04 15:13:34,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:34,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:34,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:34,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:34,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:34,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:34,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:34,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:35,087 INFO L124 PetriNetUnfolderBase]: 2001/3237 cut-off events. [2024-06-04 15:13:35,088 INFO L125 PetriNetUnfolderBase]: For 173787/173805 co-relation queries the response was YES. [2024-06-04 15:13:35,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24124 conditions, 3237 events. 2001/3237 cut-off events. For 173787/173805 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18239 event pairs, 572 based on Foata normal form. 4/3222 useless extension candidates. Maximal degree in co-relation 24051. Up to 2749 conditions per place. [2024-06-04 15:13:35,115 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 123 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-04 15:13:35,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 195 transitions, 2097 flow [2024-06-04 15:13:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 15:13:35,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-04 15:13:35,116 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 1693 flow. Second operand 7 states and 137 transitions. [2024-06-04 15:13:35,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 195 transitions, 2097 flow [2024-06-04 15:13:35,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 195 transitions, 1941 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:35,259 INFO L231 Difference]: Finished difference. Result has 159 places, 182 transitions, 1653 flow [2024-06-04 15:13:35,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1653, PETRI_PLACES=159, PETRI_TRANSITIONS=182} [2024-06-04 15:13:35,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-04 15:13:35,259 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 182 transitions, 1653 flow [2024-06-04 15:13:35,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-04 15:13:35,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:35,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:35,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 15:13:35,260 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:35,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash -632394925, now seen corresponding path program 4 times [2024-06-04 15:13:35,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:35,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431117064] [2024-06-04 15:13:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:35,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:36,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:36,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431117064] [2024-06-04 15:13:36,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431117064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:36,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:36,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245112246] [2024-06-04 15:13:36,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:36,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:36,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:36,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 182 transitions, 1653 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) [2024-06-04 15:13:36,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:36,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:36,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:36,659 INFO L124 PetriNetUnfolderBase]: 2117/3373 cut-off events. [2024-06-04 15:13:36,659 INFO L125 PetriNetUnfolderBase]: For 182554/182556 co-relation queries the response was YES. [2024-06-04 15:13:36,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25233 conditions, 3373 events. 2117/3373 cut-off events. For 182554/182556 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18589 event pairs, 591 based on Foata normal form. 5/3374 useless extension candidates. Maximal degree in co-relation 25159. Up to 2788 conditions per place. [2024-06-04 15:13:36,689 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 124 selfloop transitions, 83 changer transitions 0/212 dead transitions. [2024-06-04 15:13:36,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2583 flow [2024-06-04 15:13:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:13:36,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:13:36,690 INFO L175 Difference]: Start difference. First operand has 159 places, 182 transitions, 1653 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:13:36,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2583 flow [2024-06-04 15:13:36,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 2433 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 15:13:36,829 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 1916 flow [2024-06-04 15:13:36,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1916, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-04 15:13:36,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-04 15:13:36,830 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 1916 flow [2024-06-04 15:13:36,830 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) [2024-06-04 15:13:36,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:36,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:36,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 15:13:36,830 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:36,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:36,831 INFO L85 PathProgramCache]: Analyzing trace with hash -632394522, now seen corresponding path program 2 times [2024-06-04 15:13:36,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:36,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524320129] [2024-06-04 15:13:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:37,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524320129] [2024-06-04 15:13:37,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524320129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:37,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:37,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993538595] [2024-06-04 15:13:37,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:37,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:37,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:37,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:37,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:37,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 1916 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) [2024-06-04 15:13:37,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:37,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:37,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:38,257 INFO L124 PetriNetUnfolderBase]: 2130/3393 cut-off events. [2024-06-04 15:13:38,257 INFO L125 PetriNetUnfolderBase]: For 195383/195393 co-relation queries the response was YES. [2024-06-04 15:13:38,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26382 conditions, 3393 events. 2130/3393 cut-off events. For 195383/195393 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18733 event pairs, 595 based on Foata normal form. 9/3400 useless extension candidates. Maximal degree in co-relation 26306. Up to 3168 conditions per place. [2024-06-04 15:13:38,286 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 38 changer transitions 0/217 dead transitions. [2024-06-04 15:13:38,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2778 flow [2024-06-04 15:13:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-04 15:13:38,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-04 15:13:38,288 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 1916 flow. Second operand 8 states and 141 transitions. [2024-06-04 15:13:38,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2778 flow [2024-06-04 15:13:38,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 217 transitions, 2606 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:38,448 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 2089 flow [2024-06-04 15:13:38,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2089, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2024-06-04 15:13:38,449 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-04 15:13:38,449 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 2089 flow [2024-06-04 15:13:38,449 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) [2024-06-04 15:13:38,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:38,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:38,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 15:13:38,450 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:38,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash -631949052, now seen corresponding path program 3 times [2024-06-04 15:13:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:38,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212694394] [2024-06-04 15:13:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:38,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:39,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:39,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212694394] [2024-06-04 15:13:39,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212694394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:39,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:39,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:39,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012429403] [2024-06-04 15:13:39,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:39,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:39,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:39,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:39,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 2089 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) [2024-06-04 15:13:39,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:39,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:39,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:39,864 INFO L124 PetriNetUnfolderBase]: 2127/3389 cut-off events. [2024-06-04 15:13:39,864 INFO L125 PetriNetUnfolderBase]: For 200548/200558 co-relation queries the response was YES. [2024-06-04 15:13:39,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3389 events. 2127/3389 cut-off events. For 200548/200558 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18706 event pairs, 595 based on Foata normal form. 9/3396 useless extension candidates. Maximal degree in co-relation 26111. Up to 3165 conditions per place. [2024-06-04 15:13:39,895 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 171 selfloop transitions, 40 changer transitions 0/216 dead transitions. [2024-06-04 15:13:39,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2627 flow [2024-06-04 15:13:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:39,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 15:13:39,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-04 15:13:39,896 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 2089 flow. Second operand 8 states and 139 transitions. [2024-06-04 15:13:39,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2627 flow [2024-06-04 15:13:40,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 216 transitions, 2467 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:40,103 INFO L231 Difference]: Finished difference. Result has 172 places, 204 transitions, 2015 flow [2024-06-04 15:13:40,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2015, PETRI_PLACES=172, PETRI_TRANSITIONS=204} [2024-06-04 15:13:40,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-04 15:13:40,104 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 204 transitions, 2015 flow [2024-06-04 15:13:40,104 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) [2024-06-04 15:13:40,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:40,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:40,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 15:13:40,104 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:40,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:40,104 INFO L85 PathProgramCache]: Analyzing trace with hash -645281935, now seen corresponding path program 5 times [2024-06-04 15:13:40,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:40,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474501654] [2024-06-04 15:13:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:40,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474501654] [2024-06-04 15:13:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474501654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:40,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:40,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088165838] [2024-06-04 15:13:40,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:40,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:40,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:40,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 204 transitions, 2015 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) [2024-06-04 15:13:40,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:40,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:40,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:41,601 INFO L124 PetriNetUnfolderBase]: 2146/3422 cut-off events. [2024-06-04 15:13:41,601 INFO L125 PetriNetUnfolderBase]: For 209092/209094 co-relation queries the response was YES. [2024-06-04 15:13:41,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26546 conditions, 3422 events. 2146/3422 cut-off events. For 209092/209094 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18970 event pairs, 602 based on Foata normal form. 5/3423 useless extension candidates. Maximal degree in co-relation 26465. Up to 2821 conditions per place. [2024-06-04 15:13:41,631 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 143 selfloop transitions, 80 changer transitions 0/228 dead transitions. [2024-06-04 15:13:41,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 228 transitions, 2961 flow [2024-06-04 15:13:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:13:41,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:13:41,632 INFO L175 Difference]: Start difference. First operand has 172 places, 204 transitions, 2015 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:13:41,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 228 transitions, 2961 flow [2024-06-04 15:13:41,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 228 transitions, 2880 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:41,816 INFO L231 Difference]: Finished difference. Result has 175 places, 209 transitions, 2242 flow [2024-06-04 15:13:41,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2242, PETRI_PLACES=175, PETRI_TRANSITIONS=209} [2024-06-04 15:13:41,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-04 15:13:41,816 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 209 transitions, 2242 flow [2024-06-04 15:13:41,816 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) [2024-06-04 15:13:41,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:41,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 15:13:41,817 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:41,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash -50763931, now seen corresponding path program 6 times [2024-06-04 15:13:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282932960] [2024-06-04 15:13:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282932960] [2024-06-04 15:13:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282932960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:42,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:42,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358129907] [2024-06-04 15:13:42,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:42,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:42,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 209 transitions, 2242 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) [2024-06-04 15:13:42,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:42,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:42,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:43,369 INFO L124 PetriNetUnfolderBase]: 2153/3432 cut-off events. [2024-06-04 15:13:43,369 INFO L125 PetriNetUnfolderBase]: For 219897/219899 co-relation queries the response was YES. [2024-06-04 15:13:43,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 3432 events. 2153/3432 cut-off events. For 219897/219899 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18976 event pairs, 605 based on Foata normal form. 5/3433 useless extension candidates. Maximal degree in co-relation 27161. Up to 2829 conditions per place. [2024-06-04 15:13:43,397 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 137 selfloop transitions, 88 changer transitions 0/230 dead transitions. [2024-06-04 15:13:43,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 230 transitions, 3039 flow [2024-06-04 15:13:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:13:43,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-04 15:13:43,398 INFO L175 Difference]: Start difference. First operand has 175 places, 209 transitions, 2242 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:13:43,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 230 transitions, 3039 flow [2024-06-04 15:13:43,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 230 transitions, 2709 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-04 15:13:43,595 INFO L231 Difference]: Finished difference. Result has 176 places, 213 transitions, 2198 flow [2024-06-04 15:13:43,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2198, PETRI_PLACES=176, PETRI_TRANSITIONS=213} [2024-06-04 15:13:43,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-04 15:13:43,596 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 213 transitions, 2198 flow [2024-06-04 15:13:43,596 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) [2024-06-04 15:13:43,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:43,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:43,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 15:13:43,596 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)] === [2024-06-04 15:13:43,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2068110638, now seen corresponding path program 4 times [2024-06-04 15:13:43,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:43,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300017898] [2024-06-04 15:13:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:43,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:44,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:44,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300017898] [2024-06-04 15:13:44,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300017898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:44,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:44,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:44,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588053927] [2024-06-04 15:13:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:44,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:44,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:44,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:44,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:44,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 213 transitions, 2198 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) [2024-06-04 15:13:44,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:44,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:44,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:45,061 INFO L124 PetriNetUnfolderBase]: 2150/3430 cut-off events. [2024-06-04 15:13:45,061 INFO L125 PetriNetUnfolderBase]: For 224378/224388 co-relation queries the response was YES. [2024-06-04 15:13:45,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27007 conditions, 3430 events. 2150/3430 cut-off events. For 224378/224388 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19008 event pairs, 598 based on Foata normal form. 9/3437 useless extension candidates. Maximal degree in co-relation 26924. Up to 3199 conditions per place. [2024-06-04 15:13:45,091 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 182 selfloop transitions, 38 changer transitions 0/225 dead transitions. [2024-06-04 15:13:45,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 2672 flow [2024-06-04 15:13:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 15:13:45,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-04 15:13:45,092 INFO L175 Difference]: Start difference. First operand has 176 places, 213 transitions, 2198 flow. Second operand 8 states and 140 transitions. [2024-06-04 15:13:45,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 2672 flow [2024-06-04 15:13:45,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 225 transitions, 2416 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:45,349 INFO L231 Difference]: Finished difference. Result has 179 places, 214 transitions, 2032 flow [2024-06-04 15:13:45,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2032, PETRI_PLACES=179, PETRI_TRANSITIONS=214} [2024-06-04 15:13:45,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-04 15:13:45,350 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 214 transitions, 2032 flow [2024-06-04 15:13:45,350 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) [2024-06-04 15:13:45,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:45,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 15:13:45,350 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:45,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 873995819, now seen corresponding path program 1 times [2024-06-04 15:13:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042820879] [2024-06-04 15:13:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:46,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:46,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042820879] [2024-06-04 15:13:46,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042820879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:46,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:46,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928538444] [2024-06-04 15:13:46,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:46,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:46,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:46,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:46,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:46,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:46,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 214 transitions, 2032 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:46,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:46,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:46,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:47,114 INFO L124 PetriNetUnfolderBase]: 2043/3320 cut-off events. [2024-06-04 15:13:47,114 INFO L125 PetriNetUnfolderBase]: For 233437/233437 co-relation queries the response was YES. [2024-06-04 15:13:47,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26057 conditions, 3320 events. 2043/3320 cut-off events. For 233437/233437 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18787 event pairs, 548 based on Foata normal form. 1/3320 useless extension candidates. Maximal degree in co-relation 25973. Up to 3039 conditions per place. [2024-06-04 15:13:47,145 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-04 15:13:47,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 234 transitions, 2582 flow [2024-06-04 15:13:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:13:47,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-04 15:13:47,147 INFO L175 Difference]: Start difference. First operand has 179 places, 214 transitions, 2032 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:13:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 234 transitions, 2582 flow [2024-06-04 15:13:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 234 transitions, 2518 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:47,398 INFO L231 Difference]: Finished difference. Result has 182 places, 217 transitions, 2076 flow [2024-06-04 15:13:47,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=182, PETRI_TRANSITIONS=217} [2024-06-04 15:13:47,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-04 15:13:47,399 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 217 transitions, 2076 flow [2024-06-04 15:13:47,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:47,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:47,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:47,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 15:13:47,400 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:47,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1525590926, now seen corresponding path program 1 times [2024-06-04 15:13:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:47,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482079973] [2024-06-04 15:13:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:47,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:48,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:48,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482079973] [2024-06-04 15:13:48,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482079973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:48,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:48,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952126629] [2024-06-04 15:13:48,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:48,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:48,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:48,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:48,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 217 transitions, 2076 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:48,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:48,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:48,935 INFO L124 PetriNetUnfolderBase]: 2053/3342 cut-off events. [2024-06-04 15:13:48,936 INFO L125 PetriNetUnfolderBase]: For 246821/246821 co-relation queries the response was YES. [2024-06-04 15:13:48,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26583 conditions, 3342 events. 2053/3342 cut-off events. For 246821/246821 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19023 event pairs, 541 based on Foata normal form. 4/3345 useless extension candidates. Maximal degree in co-relation 26498. Up to 3046 conditions per place. [2024-06-04 15:13:48,967 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 209 selfloop transitions, 17 changer transitions 0/237 dead transitions. [2024-06-04 15:13:48,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 237 transitions, 2640 flow [2024-06-04 15:13:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:13:48,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-04 15:13:48,968 INFO L175 Difference]: Start difference. First operand has 182 places, 217 transitions, 2076 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:13:48,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 237 transitions, 2640 flow [2024-06-04 15:13:49,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 237 transitions, 2554 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:49,286 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2090 flow [2024-06-04 15:13:49,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2090, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-06-04 15:13:49,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-04 15:13:49,287 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2090 flow [2024-06-04 15:13:49,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:49,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:49,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:49,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 15:13:49,287 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:49,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash -639561660, now seen corresponding path program 2 times [2024-06-04 15:13:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:49,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622380762] [2024-06-04 15:13:49,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:49,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622380762] [2024-06-04 15:13:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622380762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:50,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:50,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081189865] [2024-06-04 15:13:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:50,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:50,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:50,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:50,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:50,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2090 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:50,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:50,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:50,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:50,822 INFO L124 PetriNetUnfolderBase]: 2082/3394 cut-off events. [2024-06-04 15:13:50,822 INFO L125 PetriNetUnfolderBase]: For 259944/259946 co-relation queries the response was YES. [2024-06-04 15:13:50,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27472 conditions, 3394 events. 2082/3394 cut-off events. For 259944/259946 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19462 event pairs, 546 based on Foata normal form. 6/3399 useless extension candidates. Maximal degree in co-relation 27386. Up to 3025 conditions per place. [2024-06-04 15:13:50,855 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 194 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-04 15:13:50,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 242 transitions, 2832 flow [2024-06-04 15:13:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:13:50,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:13:50,856 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2090 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:13:50,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 242 transitions, 2832 flow [2024-06-04 15:13:51,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 242 transitions, 2754 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:51,136 INFO L231 Difference]: Finished difference. Result has 186 places, 226 transitions, 2218 flow [2024-06-04 15:13:51,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2218, PETRI_PLACES=186, PETRI_TRANSITIONS=226} [2024-06-04 15:13:51,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-04 15:13:51,136 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 226 transitions, 2218 flow [2024-06-04 15:13:51,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:51,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:51,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:51,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 15:13:51,137 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash -631943100, now seen corresponding path program 3 times [2024-06-04 15:13:51,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:51,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067607595] [2024-06-04 15:13:51,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:51,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067607595] [2024-06-04 15:13:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067607595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537066537] [2024-06-04 15:13:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:52,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:52,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 226 transitions, 2218 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:52,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:52,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:52,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:52,713 INFO L124 PetriNetUnfolderBase]: 2092/3410 cut-off events. [2024-06-04 15:13:52,713 INFO L125 PetriNetUnfolderBase]: For 271266/271268 co-relation queries the response was YES. [2024-06-04 15:13:52,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28059 conditions, 3410 events. 2092/3410 cut-off events. For 271266/271268 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19579 event pairs, 542 based on Foata normal form. 6/3415 useless extension candidates. Maximal degree in co-relation 27972. Up to 3035 conditions per place. [2024-06-04 15:13:52,743 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 191 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2024-06-04 15:13:52,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 245 transitions, 2914 flow [2024-06-04 15:13:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:13:52,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-04 15:13:52,744 INFO L175 Difference]: Start difference. First operand has 186 places, 226 transitions, 2218 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:13:52,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 245 transitions, 2914 flow [2024-06-04 15:13:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 245 transitions, 2822 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:53,015 INFO L231 Difference]: Finished difference. Result has 190 places, 229 transitions, 2285 flow [2024-06-04 15:13:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=190, PETRI_TRANSITIONS=229} [2024-06-04 15:13:53,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-04 15:13:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 229 transitions, 2285 flow [2024-06-04 15:13:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:53,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 15:13:53,017 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:53,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2081182160, now seen corresponding path program 4 times [2024-06-04 15:13:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459651896] [2024-06-04 15:13:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:53,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:53,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459651896] [2024-06-04 15:13:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459651896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991351097] [2024-06-04 15:13:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:53,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:53,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 229 transitions, 2285 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:53,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:53,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:53,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:54,579 INFO L124 PetriNetUnfolderBase]: 2080/3394 cut-off events. [2024-06-04 15:13:54,579 INFO L125 PetriNetUnfolderBase]: For 274137/274139 co-relation queries the response was YES. [2024-06-04 15:13:54,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27939 conditions, 3394 events. 2080/3394 cut-off events. For 274137/274139 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19456 event pairs, 540 based on Foata normal form. 6/3399 useless extension candidates. Maximal degree in co-relation 27850. Up to 3027 conditions per place. [2024-06-04 15:13:54,609 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-04 15:13:54,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 244 transitions, 2809 flow [2024-06-04 15:13:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:13:54,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-04 15:13:54,610 INFO L175 Difference]: Start difference. First operand has 190 places, 229 transitions, 2285 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:13:54,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 244 transitions, 2809 flow [2024-06-04 15:13:54,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 2646 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:54,890 INFO L231 Difference]: Finished difference. Result has 193 places, 229 transitions, 2210 flow [2024-06-04 15:13:54,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=193, PETRI_TRANSITIONS=229} [2024-06-04 15:13:54,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-04 15:13:54,890 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 229 transitions, 2210 flow [2024-06-04 15:13:54,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:54,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:54,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:54,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 15:13:54,891 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:54,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash -631933180, now seen corresponding path program 1 times [2024-06-04 15:13:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669820250] [2024-06-04 15:13:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:54,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:56,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:56,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669820250] [2024-06-04 15:13:56,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669820250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:56,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:56,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:13:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624013241] [2024-06-04 15:13:56,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:56,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:13:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:13:56,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:13:56,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:13:56,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 229 transitions, 2210 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) [2024-06-04 15:13:56,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:56,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:13:56,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:57,025 INFO L124 PetriNetUnfolderBase]: 2208/3514 cut-off events. [2024-06-04 15:13:57,026 INFO L125 PetriNetUnfolderBase]: For 276974/276974 co-relation queries the response was YES. [2024-06-04 15:13:57,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28615 conditions, 3514 events. 2208/3514 cut-off events. For 276974/276974 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19572 event pairs, 599 based on Foata normal form. 1/3514 useless extension candidates. Maximal degree in co-relation 28525. Up to 3317 conditions per place. [2024-06-04 15:13:57,059 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 19 changer transitions 0/243 dead transitions. [2024-06-04 15:13:57,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 243 transitions, 2790 flow [2024-06-04 15:13:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 15:13:57,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-04 15:13:57,061 INFO L175 Difference]: Start difference. First operand has 193 places, 229 transitions, 2210 flow. Second operand 8 states and 135 transitions. [2024-06-04 15:13:57,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 243 transitions, 2790 flow [2024-06-04 15:13:57,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 243 transitions, 2679 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 15:13:57,365 INFO L231 Difference]: Finished difference. Result has 193 places, 232 transitions, 2229 flow [2024-06-04 15:13:57,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=193, PETRI_TRANSITIONS=232} [2024-06-04 15:13:57,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-04 15:13:57,365 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 232 transitions, 2229 flow [2024-06-04 15:13:57,366 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) [2024-06-04 15:13:57,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:57,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:57,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 15:13:57,366 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:57,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1753271324, now seen corresponding path program 1 times [2024-06-04 15:13:57,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:57,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949719387] [2024-06-04 15:13:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:57,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:58,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:58,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949719387] [2024-06-04 15:13:58,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949719387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:58,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:58,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475698890] [2024-06-04 15:13:58,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:58,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:58,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:58,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:58,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:13:58,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 232 transitions, 2229 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:58,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:58,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:13:58,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:59,123 INFO L124 PetriNetUnfolderBase]: 2174/3505 cut-off events. [2024-06-04 15:13:59,123 INFO L125 PetriNetUnfolderBase]: For 298490/298492 co-relation queries the response was YES. [2024-06-04 15:13:59,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28956 conditions, 3505 events. 2174/3505 cut-off events. For 298490/298492 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19828 event pairs, 442 based on Foata normal form. 12/3512 useless extension candidates. Maximal degree in co-relation 28865. Up to 3000 conditions per place. [2024-06-04 15:13:59,157 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-04 15:13:59,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 267 transitions, 2907 flow [2024-06-04 15:13:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-04 15:13:59,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-04 15:13:59,159 INFO L175 Difference]: Start difference. First operand has 193 places, 232 transitions, 2229 flow. Second operand 8 states and 164 transitions. [2024-06-04 15:13:59,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 267 transitions, 2907 flow [2024-06-04 15:13:59,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 267 transitions, 2739 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-04 15:13:59,419 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 2210 flow [2024-06-04 15:13:59,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-04 15:13:59,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-04 15:13:59,420 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 2210 flow [2024-06-04 15:13:59,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:59,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:59,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:59,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 15:13:59,420 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:13:59,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -337339762, now seen corresponding path program 2 times [2024-06-04 15:13:59,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:59,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889510081] [2024-06-04 15:13:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:59,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:00,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:00,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889510081] [2024-06-04 15:14:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889510081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:00,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:00,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106724851] [2024-06-04 15:14:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:00,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:00,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:00,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:00,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:00,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:00,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:00,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:01,125 INFO L124 PetriNetUnfolderBase]: 2216/3571 cut-off events. [2024-06-04 15:14:01,126 INFO L125 PetriNetUnfolderBase]: For 314197/314199 co-relation queries the response was YES. [2024-06-04 15:14:01,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30011 conditions, 3571 events. 2216/3571 cut-off events. For 314197/314199 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20281 event pairs, 583 based on Foata normal form. 14/3580 useless extension candidates. Maximal degree in co-relation 29919. Up to 3099 conditions per place. [2024-06-04 15:14:01,161 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 26 changer transitions 0/267 dead transitions. [2024-06-04 15:14:01,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 267 transitions, 2890 flow [2024-06-04 15:14:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-04 15:14:01,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-04 15:14:01,163 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 2210 flow. Second operand 8 states and 163 transitions. [2024-06-04 15:14:01,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 267 transitions, 2890 flow [2024-06-04 15:14:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 267 transitions, 2789 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:01,476 INFO L231 Difference]: Finished difference. Result has 196 places, 238 transitions, 2241 flow [2024-06-04 15:14:01,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2241, PETRI_PLACES=196, PETRI_TRANSITIONS=238} [2024-06-04 15:14:01,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-04 15:14:01,477 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 238 transitions, 2241 flow [2024-06-04 15:14:01,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:01,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:01,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:01,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 15:14:01,478 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)] === [2024-06-04 15:14:01,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:01,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1744689532, now seen corresponding path program 1 times [2024-06-04 15:14:01,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:01,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364000098] [2024-06-04 15:14:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:01,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:02,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:02,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364000098] [2024-06-04 15:14:02,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364000098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:02,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:02,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972235918] [2024-06-04 15:14:02,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:02,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:02,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:02,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 238 transitions, 2241 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) [2024-06-04 15:14:02,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:02,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:02,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:03,131 INFO L124 PetriNetUnfolderBase]: 2303/3668 cut-off events. [2024-06-04 15:14:03,131 INFO L125 PetriNetUnfolderBase]: For 309982/309984 co-relation queries the response was YES. [2024-06-04 15:14:03,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30721 conditions, 3668 events. 2303/3668 cut-off events. For 309982/309984 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20560 event pairs, 614 based on Foata normal form. 5/3672 useless extension candidates. Maximal degree in co-relation 30628. Up to 3366 conditions per place. [2024-06-04 15:14:03,169 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 232 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-04 15:14:03,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 269 transitions, 2957 flow [2024-06-04 15:14:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:14:03,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:14:03,170 INFO L175 Difference]: Start difference. First operand has 196 places, 238 transitions, 2241 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:14:03,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 269 transitions, 2957 flow [2024-06-04 15:14:03,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 269 transitions, 2857 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:03,436 INFO L231 Difference]: Finished difference. Result has 199 places, 242 transitions, 2318 flow [2024-06-04 15:14:03,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2318, PETRI_PLACES=199, PETRI_TRANSITIONS=242} [2024-06-04 15:14:03,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-04 15:14:03,436 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 242 transitions, 2318 flow [2024-06-04 15:14:03,436 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) [2024-06-04 15:14:03,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:03,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:03,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 15:14:03,437 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)] === [2024-06-04 15:14:03,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1457813114, now seen corresponding path program 3 times [2024-06-04 15:14:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:03,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605180766] [2024-06-04 15:14:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:03,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:04,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605180766] [2024-06-04 15:14:04,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605180766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:04,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898725438] [2024-06-04 15:14:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:04,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:04,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:04,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 242 transitions, 2318 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:04,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:04,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:04,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:05,065 INFO L124 PetriNetUnfolderBase]: 2281/3676 cut-off events. [2024-06-04 15:14:05,066 INFO L125 PetriNetUnfolderBase]: For 342496/342518 co-relation queries the response was YES. [2024-06-04 15:14:05,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31596 conditions, 3676 events. 2281/3676 cut-off events. For 342496/342518 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21072 event pairs, 580 based on Foata normal form. 18/3675 useless extension candidates. Maximal degree in co-relation 31502. Up to 3144 conditions per place. [2024-06-04 15:14:05,104 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 207 selfloop transitions, 38 changer transitions 0/268 dead transitions. [2024-06-04 15:14:05,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 268 transitions, 3004 flow [2024-06-04 15:14:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-04 15:14:05,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-04 15:14:05,105 INFO L175 Difference]: Start difference. First operand has 199 places, 242 transitions, 2318 flow. Second operand 8 states and 159 transitions. [2024-06-04 15:14:05,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 268 transitions, 3004 flow [2024-06-04 15:14:05,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 268 transitions, 2855 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:05,430 INFO L231 Difference]: Finished difference. Result has 200 places, 244 transitions, 2331 flow [2024-06-04 15:14:05,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2331, PETRI_PLACES=200, PETRI_TRANSITIONS=244} [2024-06-04 15:14:05,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-04 15:14:05,430 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 244 transitions, 2331 flow [2024-06-04 15:14:05,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:05,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:05,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 15:14:05,431 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)] === [2024-06-04 15:14:05,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1634941472, now seen corresponding path program 1 times [2024-06-04 15:14:05,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:05,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856796902] [2024-06-04 15:14:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:06,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856796902] [2024-06-04 15:14:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856796902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:06,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:06,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936479662] [2024-06-04 15:14:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:06,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:06,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:06,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:06,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 244 transitions, 2331 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:06,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:06,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:06,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:07,330 INFO L124 PetriNetUnfolderBase]: 2282/3668 cut-off events. [2024-06-04 15:14:07,331 INFO L125 PetriNetUnfolderBase]: For 333994/333996 co-relation queries the response was YES. [2024-06-04 15:14:07,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31801 conditions, 3668 events. 2282/3668 cut-off events. For 333994/333996 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20897 event pairs, 598 based on Foata normal form. 2/3664 useless extension candidates. Maximal degree in co-relation 31706. Up to 3175 conditions per place. [2024-06-04 15:14:07,367 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 37 changer transitions 0/271 dead transitions. [2024-06-04 15:14:07,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 271 transitions, 2989 flow [2024-06-04 15:14:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 15:14:07,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-04 15:14:07,368 INFO L175 Difference]: Start difference. First operand has 200 places, 244 transitions, 2331 flow. Second operand 8 states and 161 transitions. [2024-06-04 15:14:07,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 271 transitions, 2989 flow [2024-06-04 15:14:07,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 271 transitions, 2861 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:07,682 INFO L231 Difference]: Finished difference. Result has 202 places, 248 transitions, 2396 flow [2024-06-04 15:14:07,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2396, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2024-06-04 15:14:07,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-04 15:14:07,683 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 2396 flow [2024-06-04 15:14:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:07,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 15:14:07,683 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)] === [2024-06-04 15:14:07,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1634821316, now seen corresponding path program 1 times [2024-06-04 15:14:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045775188] [2024-06-04 15:14:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045775188] [2024-06-04 15:14:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045775188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:08,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:08,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682702548] [2024-06-04 15:14:08,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:08,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:08,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:08,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 2396 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) [2024-06-04 15:14:08,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:08,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:08,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:09,214 INFO L124 PetriNetUnfolderBase]: 2377/3778 cut-off events. [2024-06-04 15:14:09,214 INFO L125 PetriNetUnfolderBase]: For 347329/347331 co-relation queries the response was YES. [2024-06-04 15:14:09,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32848 conditions, 3778 events. 2377/3778 cut-off events. For 347329/347331 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21246 event pairs, 618 based on Foata normal form. 6/3783 useless extension candidates. Maximal degree in co-relation 32752. Up to 3479 conditions per place. [2024-06-04 15:14:09,251 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-04 15:14:09,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 274 transitions, 3075 flow [2024-06-04 15:14:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:14:09,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:14:09,252 INFO L175 Difference]: Start difference. First operand has 202 places, 248 transitions, 2396 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:14:09,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 274 transitions, 3075 flow [2024-06-04 15:14:09,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 274 transitions, 2893 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:09,560 INFO L231 Difference]: Finished difference. Result has 203 places, 252 transitions, 2354 flow [2024-06-04 15:14:09,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=203, PETRI_TRANSITIONS=252} [2024-06-04 15:14:09,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-04 15:14:09,561 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 252 transitions, 2354 flow [2024-06-04 15:14:09,561 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) [2024-06-04 15:14:09,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:09,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:09,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 15:14:09,561 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)] === [2024-06-04 15:14:09,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash -50329114, now seen corresponding path program 2 times [2024-06-04 15:14:09,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:09,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734202849] [2024-06-04 15:14:09,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:09,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:10,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:10,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734202849] [2024-06-04 15:14:10,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734202849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:10,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:10,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:10,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394266131] [2024-06-04 15:14:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:10,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:10,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:10,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:10,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 252 transitions, 2354 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) [2024-06-04 15:14:10,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:10,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:10,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:11,073 INFO L124 PetriNetUnfolderBase]: 2413/3842 cut-off events. [2024-06-04 15:14:11,073 INFO L125 PetriNetUnfolderBase]: For 362762/362764 co-relation queries the response was YES. [2024-06-04 15:14:11,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33460 conditions, 3842 events. 2413/3842 cut-off events. For 362762/362764 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21730 event pairs, 620 based on Foata normal form. 6/3847 useless extension candidates. Maximal degree in co-relation 33363. Up to 3376 conditions per place. [2024-06-04 15:14:11,114 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 57 changer transitions 0/281 dead transitions. [2024-06-04 15:14:11,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3368 flow [2024-06-04 15:14:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:14:11,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:14:11,115 INFO L175 Difference]: Start difference. First operand has 203 places, 252 transitions, 2354 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:14:11,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3368 flow [2024-06-04 15:14:11,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 3273 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:11,451 INFO L231 Difference]: Finished difference. Result has 205 places, 259 transitions, 2528 flow [2024-06-04 15:14:11,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2528, PETRI_PLACES=205, PETRI_TRANSITIONS=259} [2024-06-04 15:14:11,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-04 15:14:11,451 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 259 transitions, 2528 flow [2024-06-04 15:14:11,451 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) [2024-06-04 15:14:11,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:11,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 15:14:11,452 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:11,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash -50091964, now seen corresponding path program 3 times [2024-06-04 15:14:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:11,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878668474] [2024-06-04 15:14:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:11,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:12,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:12,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878668474] [2024-06-04 15:14:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878668474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:12,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24107164] [2024-06-04 15:14:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:12,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:12,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 259 transitions, 2528 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) [2024-06-04 15:14:12,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:12,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:13,010 INFO L124 PetriNetUnfolderBase]: 2401/3820 cut-off events. [2024-06-04 15:14:13,010 INFO L125 PetriNetUnfolderBase]: For 365723/365725 co-relation queries the response was YES. [2024-06-04 15:14:13,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33295 conditions, 3820 events. 2401/3820 cut-off events. For 365723/365725 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21565 event pairs, 605 based on Foata normal form. 6/3825 useless extension candidates. Maximal degree in co-relation 33197. Up to 3368 conditions per place. [2024-06-04 15:14:13,050 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-06-04 15:14:13,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 280 transitions, 3274 flow [2024-06-04 15:14:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:14:13,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:14:13,051 INFO L175 Difference]: Start difference. First operand has 205 places, 259 transitions, 2528 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:14:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 280 transitions, 3274 flow [2024-06-04 15:14:13,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 280 transitions, 3108 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 15:14:13,531 INFO L231 Difference]: Finished difference. Result has 209 places, 259 transitions, 2486 flow [2024-06-04 15:14:13,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2362, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2486, PETRI_PLACES=209, PETRI_TRANSITIONS=259} [2024-06-04 15:14:13,532 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-04 15:14:13,532 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 259 transitions, 2486 flow [2024-06-04 15:14:13,532 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) [2024-06-04 15:14:13,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:13,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:13,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 15:14:13,532 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:13,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1457802202, now seen corresponding path program 2 times [2024-06-04 15:14:13,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:13,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560379468] [2024-06-04 15:14:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:14,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:14,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560379468] [2024-06-04 15:14:14,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560379468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:14,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:14,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:14,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68287385] [2024-06-04 15:14:14,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:14,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:14,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:14,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:14,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 259 transitions, 2486 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) [2024-06-04 15:14:14,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:14,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:14,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:15,360 INFO L124 PetriNetUnfolderBase]: 2472/3924 cut-off events. [2024-06-04 15:14:15,361 INFO L125 PetriNetUnfolderBase]: For 389114/389116 co-relation queries the response was YES. [2024-06-04 15:14:15,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34591 conditions, 3924 events. 2472/3924 cut-off events. For 389114/389116 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22167 event pairs, 624 based on Foata normal form. 5/3928 useless extension candidates. Maximal degree in co-relation 34492. Up to 3363 conditions per place. [2024-06-04 15:14:15,401 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 221 selfloop transitions, 69 changer transitions 0/295 dead transitions. [2024-06-04 15:14:15,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 295 transitions, 3720 flow [2024-06-04 15:14:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:14:15,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:14:15,402 INFO L175 Difference]: Start difference. First operand has 209 places, 259 transitions, 2486 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:14:15,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 295 transitions, 3720 flow [2024-06-04 15:14:15,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 295 transitions, 3628 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:15,779 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 2910 flow [2024-06-04 15:14:15,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-04 15:14:15,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-04 15:14:15,780 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 2910 flow [2024-06-04 15:14:15,780 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) [2024-06-04 15:14:15,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:15,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:15,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 15:14:15,781 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:15,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash -50083470, now seen corresponding path program 3 times [2024-06-04 15:14:15,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:15,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169541994] [2024-06-04 15:14:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:16,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169541994] [2024-06-04 15:14:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169541994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:16,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:16,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093620471] [2024-06-04 15:14:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:16,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:16,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:16,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 2910 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) [2024-06-04 15:14:16,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:16,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:16,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:17,534 INFO L124 PetriNetUnfolderBase]: 2491/3953 cut-off events. [2024-06-04 15:14:17,535 INFO L125 PetriNetUnfolderBase]: For 406788/406790 co-relation queries the response was YES. [2024-06-04 15:14:17,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35835 conditions, 3953 events. 2491/3953 cut-off events. For 406788/406790 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22314 event pairs, 605 based on Foata normal form. 5/3957 useless extension candidates. Maximal degree in co-relation 35734. Up to 3382 conditions per place. [2024-06-04 15:14:17,574 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 71 changer transitions 0/299 dead transitions. [2024-06-04 15:14:17,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 299 transitions, 3959 flow [2024-06-04 15:14:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:14:17,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:14:17,575 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 2910 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:14:17,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 299 transitions, 3959 flow [2024-06-04 15:14:17,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 299 transitions, 3785 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-04 15:14:17,984 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3009 flow [2024-06-04 15:14:17,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3009, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-04 15:14:17,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-04 15:14:17,984 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3009 flow [2024-06-04 15:14:17,984 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) [2024-06-04 15:14:17,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:17,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:17,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 15:14:17,985 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:17,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash -50083036, now seen corresponding path program 1 times [2024-06-04 15:14:17,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:17,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571877977] [2024-06-04 15:14:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:17,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571877977] [2024-06-04 15:14:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571877977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:18,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494921505] [2024-06-04 15:14:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:18,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:18,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3009 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) [2024-06-04 15:14:18,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:18,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:18,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:19,651 INFO L124 PetriNetUnfolderBase]: 2496/3951 cut-off events. [2024-06-04 15:14:19,651 INFO L125 PetriNetUnfolderBase]: For 412291/412291 co-relation queries the response was YES. [2024-06-04 15:14:19,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36123 conditions, 3951 events. 2496/3951 cut-off events. For 412291/412291 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22245 event pairs, 640 based on Foata normal form. 1/3951 useless extension candidates. Maximal degree in co-relation 36020. Up to 3726 conditions per place. [2024-06-04 15:14:19,698 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 20 changer transitions 0/296 dead transitions. [2024-06-04 15:14:19,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 3739 flow [2024-06-04 15:14:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 15:14:19,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-04 15:14:19,699 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3009 flow. Second operand 9 states and 154 transitions. [2024-06-04 15:14:19,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 3739 flow [2024-06-04 15:14:20,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 296 transitions, 3494 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:20,196 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 2920 flow [2024-06-04 15:14:20,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2920, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-04 15:14:20,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-04 15:14:20,197 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 2920 flow [2024-06-04 15:14:20,197 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) [2024-06-04 15:14:20,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:20,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:20,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 15:14:20,197 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)] === [2024-06-04 15:14:20,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1528974524, now seen corresponding path program 4 times [2024-06-04 15:14:20,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:20,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928436455] [2024-06-04 15:14:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:21,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:21,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928436455] [2024-06-04 15:14:21,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928436455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:21,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:21,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:21,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552792983] [2024-06-04 15:14:21,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:21,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:21,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:21,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:21,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 2920 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) [2024-06-04 15:14:21,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:21,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:21,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:22,021 INFO L124 PetriNetUnfolderBase]: 2491/3954 cut-off events. [2024-06-04 15:14:22,021 INFO L125 PetriNetUnfolderBase]: For 413512/413514 co-relation queries the response was YES. [2024-06-04 15:14:22,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35784 conditions, 3954 events. 2491/3954 cut-off events. For 413512/413514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22312 event pairs, 604 based on Foata normal form. 5/3958 useless extension candidates. Maximal degree in co-relation 35681. Up to 3387 conditions per place. [2024-06-04 15:14:22,066 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 225 selfloop transitions, 71 changer transitions 0/301 dead transitions. [2024-06-04 15:14:22,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 301 transitions, 3728 flow [2024-06-04 15:14:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:14:22,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:14:22,068 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 2920 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:14:22,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 301 transitions, 3728 flow [2024-06-04 15:14:22,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 301 transitions, 3516 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:22,612 INFO L231 Difference]: Finished difference. Result has 222 places, 278 transitions, 2857 flow [2024-06-04 15:14:22,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2857, PETRI_PLACES=222, PETRI_TRANSITIONS=278} [2024-06-04 15:14:22,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-04 15:14:22,612 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 278 transitions, 2857 flow [2024-06-04 15:14:22,612 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) [2024-06-04 15:14:22,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:22,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:22,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 15:14:22,613 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)] === [2024-06-04 15:14:22,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1470740592, now seen corresponding path program 4 times [2024-06-04 15:14:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660427930] [2024-06-04 15:14:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:23,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:23,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660427930] [2024-06-04 15:14:23,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660427930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:23,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:23,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:23,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57597876] [2024-06-04 15:14:23,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:23,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:23,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:23,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:23,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:23,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 278 transitions, 2857 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:23,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:23,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:23,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:24,284 INFO L124 PetriNetUnfolderBase]: 2415/3913 cut-off events. [2024-06-04 15:14:24,284 INFO L125 PetriNetUnfolderBase]: For 443412/443422 co-relation queries the response was YES. [2024-06-04 15:14:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35656 conditions, 3913 events. 2415/3913 cut-off events. For 443412/443422 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22917 event pairs, 604 based on Foata normal form. 22/3901 useless extension candidates. Maximal degree in co-relation 35552. Up to 3279 conditions per place. [2024-06-04 15:14:24,327 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 55 changer transitions 0/299 dead transitions. [2024-06-04 15:14:24,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 299 transitions, 3611 flow [2024-06-04 15:14:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 15:14:24,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-04 15:14:24,328 INFO L175 Difference]: Start difference. First operand has 222 places, 278 transitions, 2857 flow. Second operand 8 states and 157 transitions. [2024-06-04 15:14:24,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 299 transitions, 3611 flow [2024-06-04 15:14:24,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 299 transitions, 3479 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:24,908 INFO L231 Difference]: Finished difference. Result has 223 places, 280 transitions, 2931 flow [2024-06-04 15:14:24,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2931, PETRI_PLACES=223, PETRI_TRANSITIONS=280} [2024-06-04 15:14:24,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-04 15:14:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 280 transitions, 2931 flow [2024-06-04 15:14:24,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:24,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 15:14:24,909 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)] === [2024-06-04 15:14:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1102031348, now seen corresponding path program 2 times [2024-06-04 15:14:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780867822] [2024-06-04 15:14:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:25,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:25,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780867822] [2024-06-04 15:14:25,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780867822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:25,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:25,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:25,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437340572] [2024-06-04 15:14:25,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:25,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:25,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:25,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:25,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:26,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:26,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 280 transitions, 2931 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:26,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:26,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:26,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:26,916 INFO L124 PetriNetUnfolderBase]: 2429/3891 cut-off events. [2024-06-04 15:14:26,916 INFO L125 PetriNetUnfolderBase]: For 431592/431592 co-relation queries the response was YES. [2024-06-04 15:14:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36066 conditions, 3891 events. 2429/3891 cut-off events. For 431592/431592 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22331 event pairs, 631 based on Foata normal form. 1/3884 useless extension candidates. Maximal degree in co-relation 35961. Up to 3385 conditions per place. [2024-06-04 15:14:26,954 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 39 changer transitions 0/303 dead transitions. [2024-06-04 15:14:26,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 303 transitions, 3637 flow [2024-06-04 15:14:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:14:26,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-04 15:14:26,956 INFO L175 Difference]: Start difference. First operand has 223 places, 280 transitions, 2931 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:14:26,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 303 transitions, 3637 flow [2024-06-04 15:14:27,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 303 transitions, 3469 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:27,495 INFO L231 Difference]: Finished difference. Result has 225 places, 283 transitions, 2955 flow [2024-06-04 15:14:27,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2955, PETRI_PLACES=225, PETRI_TRANSITIONS=283} [2024-06-04 15:14:27,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-04 15:14:27,496 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 283 transitions, 2955 flow [2024-06-04 15:14:27,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:27,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:27,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:27,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 15:14:27,496 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:14:27,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash -61821500, now seen corresponding path program 4 times [2024-06-04 15:14:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:27,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984442309] [2024-06-04 15:14:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:27,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:28,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:28,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984442309] [2024-06-04 15:14:28,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984442309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:28,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:28,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:28,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614091653] [2024-06-04 15:14:28,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:28,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:28,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:28,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:28,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:28,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:28,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 283 transitions, 2955 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) [2024-06-04 15:14:28,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:28,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:28,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:29,236 INFO L124 PetriNetUnfolderBase]: 2513/3975 cut-off events. [2024-06-04 15:14:29,236 INFO L125 PetriNetUnfolderBase]: For 437409/437409 co-relation queries the response was YES. [2024-06-04 15:14:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36471 conditions, 3975 events. 2513/3975 cut-off events. For 437409/437409 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22370 event pairs, 660 based on Foata normal form. 2/3973 useless extension candidates. Maximal degree in co-relation 36365. Up to 3689 conditions per place. [2024-06-04 15:14:29,276 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 271 selfloop transitions, 26 changer transitions 0/302 dead transitions. [2024-06-04 15:14:29,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 302 transitions, 3611 flow [2024-06-04 15:14:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 15:14:29,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-04 15:14:29,277 INFO L175 Difference]: Start difference. First operand has 225 places, 283 transitions, 2955 flow. Second operand 8 states and 147 transitions. [2024-06-04 15:14:29,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 302 transitions, 3611 flow [2024-06-04 15:14:29,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 302 transitions, 3411 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:29,997 INFO L231 Difference]: Finished difference. Result has 227 places, 283 transitions, 2813 flow [2024-06-04 15:14:29,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2813, PETRI_PLACES=227, PETRI_TRANSITIONS=283} [2024-06-04 15:14:29,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-04 15:14:29,998 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 283 transitions, 2813 flow [2024-06-04 15:14:29,998 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) [2024-06-04 15:14:29,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:29,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 15:14:29,998 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)] === [2024-06-04 15:14:29,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -78233186, now seen corresponding path program 3 times [2024-06-04 15:14:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:29,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326522036] [2024-06-04 15:14:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:29,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326522036] [2024-06-04 15:14:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326522036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:31,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:31,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:31,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161165376] [2024-06-04 15:14:31,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:31,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:31,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:31,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 283 transitions, 2813 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:31,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:31,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:31,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:32,062 INFO L124 PetriNetUnfolderBase]: 2422/3880 cut-off events. [2024-06-04 15:14:32,063 INFO L125 PetriNetUnfolderBase]: For 447916/447916 co-relation queries the response was YES. [2024-06-04 15:14:32,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36063 conditions, 3880 events. 2422/3880 cut-off events. For 447916/447916 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22255 event pairs, 630 based on Foata normal form. 1/3873 useless extension candidates. Maximal degree in co-relation 35956. Up to 3378 conditions per place. [2024-06-04 15:14:32,104 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 240 selfloop transitions, 40 changer transitions 0/306 dead transitions. [2024-06-04 15:14:32,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 306 transitions, 3531 flow [2024-06-04 15:14:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 15:14:32,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-04 15:14:32,105 INFO L175 Difference]: Start difference. First operand has 227 places, 283 transitions, 2813 flow. Second operand 8 states and 158 transitions. [2024-06-04 15:14:32,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 306 transitions, 3531 flow [2024-06-04 15:14:32,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 306 transitions, 3330 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 15:14:32,617 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 2812 flow [2024-06-04 15:14:32,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2812, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-04 15:14:32,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-04 15:14:32,618 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 2812 flow [2024-06-04 15:14:32,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:32,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:32,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:32,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 15:14:32,618 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)] === [2024-06-04 15:14:32,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash -66805346, now seen corresponding path program 4 times [2024-06-04 15:14:32,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:32,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505456187] [2024-06-04 15:14:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:32,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505456187] [2024-06-04 15:14:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505456187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:33,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:33,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018427327] [2024-06-04 15:14:33,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:33,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:33,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:33,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:33,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:14:33,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 2812 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:33,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:33,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:14:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:34,489 INFO L124 PetriNetUnfolderBase]: 2419/3876 cut-off events. [2024-06-04 15:14:34,489 INFO L125 PetriNetUnfolderBase]: For 459056/459056 co-relation queries the response was YES. [2024-06-04 15:14:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36318 conditions, 3876 events. 2419/3876 cut-off events. For 459056/459056 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22239 event pairs, 630 based on Foata normal form. 1/3869 useless extension candidates. Maximal degree in co-relation 36210. Up to 3359 conditions per place. [2024-06-04 15:14:34,536 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 228 selfloop transitions, 52 changer transitions 0/306 dead transitions. [2024-06-04 15:14:34,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 306 transitions, 3528 flow [2024-06-04 15:14:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 15:14:34,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-04 15:14:34,538 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 2812 flow. Second operand 8 states and 157 transitions. [2024-06-04 15:14:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 306 transitions, 3528 flow [2024-06-04 15:14:35,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 306 transitions, 3350 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:35,220 INFO L231 Difference]: Finished difference. Result has 227 places, 289 transitions, 2864 flow [2024-06-04 15:14:35,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2864, PETRI_PLACES=227, PETRI_TRANSITIONS=289} [2024-06-04 15:14:35,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-04 15:14:35,221 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 289 transitions, 2864 flow [2024-06-04 15:14:35,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:35,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:35,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:35,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 15:14:35,221 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)] === [2024-06-04 15:14:35,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -234977054, now seen corresponding path program 5 times [2024-06-04 15:14:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921644130] [2024-06-04 15:14:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:36,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:36,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921644130] [2024-06-04 15:14:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921644130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:36,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:36,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834110864] [2024-06-04 15:14:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:36,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 289 transitions, 2864 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) [2024-06-04 15:14:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:36,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:36,894 INFO L124 PetriNetUnfolderBase]: 2541/4032 cut-off events. [2024-06-04 15:14:36,894 INFO L125 PetriNetUnfolderBase]: For 479145/479145 co-relation queries the response was YES. [2024-06-04 15:14:36,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37702 conditions, 4032 events. 2541/4032 cut-off events. For 479145/479145 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22889 event pairs, 633 based on Foata normal form. 2/4030 useless extension candidates. Maximal degree in co-relation 37593. Up to 3659 conditions per place. [2024-06-04 15:14:36,941 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 261 selfloop transitions, 47 changer transitions 0/313 dead transitions. [2024-06-04 15:14:36,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 313 transitions, 3812 flow [2024-06-04 15:14:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:14:36,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-04 15:14:36,942 INFO L175 Difference]: Start difference. First operand has 227 places, 289 transitions, 2864 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:14:36,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 313 transitions, 3812 flow [2024-06-04 15:14:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 3604 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:37,646 INFO L231 Difference]: Finished difference. Result has 230 places, 295 transitions, 2909 flow [2024-06-04 15:14:37,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2909, PETRI_PLACES=230, PETRI_TRANSITIONS=295} [2024-06-04 15:14:37,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-04 15:14:37,647 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 295 transitions, 2909 flow [2024-06-04 15:14:37,647 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) [2024-06-04 15:14:37,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:37,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:37,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 15:14:37,647 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)] === [2024-06-04 15:14:37,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:37,647 INFO L85 PathProgramCache]: Analyzing trace with hash 48248860, now seen corresponding path program 6 times [2024-06-04 15:14:37,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:37,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313001200] [2024-06-04 15:14:37,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:37,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:38,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313001200] [2024-06-04 15:14:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313001200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:38,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:38,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877630922] [2024-06-04 15:14:38,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:38,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:38,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:38,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:38,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:38,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 295 transitions, 2909 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) [2024-06-04 15:14:38,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:38,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:38,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:39,309 INFO L124 PetriNetUnfolderBase]: 2535/4024 cut-off events. [2024-06-04 15:14:39,309 INFO L125 PetriNetUnfolderBase]: For 484880/484880 co-relation queries the response was YES. [2024-06-04 15:14:39,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37656 conditions, 4024 events. 2535/4024 cut-off events. For 484880/484880 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22816 event pairs, 640 based on Foata normal form. 2/4022 useless extension candidates. Maximal degree in co-relation 37545. Up to 3654 conditions per place. [2024-06-04 15:14:39,359 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 262 selfloop transitions, 45 changer transitions 0/312 dead transitions. [2024-06-04 15:14:39,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 312 transitions, 3587 flow [2024-06-04 15:14:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 15:14:39,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-04 15:14:39,360 INFO L175 Difference]: Start difference. First operand has 230 places, 295 transitions, 2909 flow. Second operand 8 states and 149 transitions. [2024-06-04 15:14:39,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 312 transitions, 3587 flow [2024-06-04 15:14:40,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 3432 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:40,144 INFO L231 Difference]: Finished difference. Result has 233 places, 295 transitions, 2850 flow [2024-06-04 15:14:40,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=233, PETRI_TRANSITIONS=295} [2024-06-04 15:14:40,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-04 15:14:40,145 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 295 transitions, 2850 flow [2024-06-04 15:14:40,145 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) [2024-06-04 15:14:40,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:40,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:40,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 15:14:40,146 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)] === [2024-06-04 15:14:40,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1641572850, now seen corresponding path program 7 times [2024-06-04 15:14:40,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:40,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333956416] [2024-06-04 15:14:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:40,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333956416] [2024-06-04 15:14:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333956416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:40,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:40,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235526873] [2024-06-04 15:14:40,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:40,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:40,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:40,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:41,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:41,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 295 transitions, 2850 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) [2024-06-04 15:14:41,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:41,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:41,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:41,897 INFO L124 PetriNetUnfolderBase]: 2555/4074 cut-off events. [2024-06-04 15:14:41,897 INFO L125 PetriNetUnfolderBase]: For 501794/501796 co-relation queries the response was YES. [2024-06-04 15:14:41,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37967 conditions, 4074 events. 2555/4074 cut-off events. For 501794/501796 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23304 event pairs, 634 based on Foata normal form. 6/4076 useless extension candidates. Maximal degree in co-relation 37855. Up to 3366 conditions per place. [2024-06-04 15:14:41,941 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 212 selfloop transitions, 99 changer transitions 0/316 dead transitions. [2024-06-04 15:14:41,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 316 transitions, 3913 flow [2024-06-04 15:14:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:14:41,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-04 15:14:41,942 INFO L175 Difference]: Start difference. First operand has 233 places, 295 transitions, 2850 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:14:41,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 316 transitions, 3913 flow [2024-06-04 15:14:42,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 316 transitions, 3806 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:42,745 INFO L231 Difference]: Finished difference. Result has 234 places, 299 transitions, 3031 flow [2024-06-04 15:14:42,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3031, PETRI_PLACES=234, PETRI_TRANSITIONS=299} [2024-06-04 15:14:42,745 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-04 15:14:42,746 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 299 transitions, 3031 flow [2024-06-04 15:14:42,746 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) [2024-06-04 15:14:42,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:42,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 15:14:42,746 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)] === [2024-06-04 15:14:42,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1470863910, now seen corresponding path program 8 times [2024-06-04 15:14:42,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:42,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978679481] [2024-06-04 15:14:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:42,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:43,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:43,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978679481] [2024-06-04 15:14:43,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978679481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:43,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:43,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:43,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877376599] [2024-06-04 15:14:43,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:43,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:43,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:43,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:43,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:43,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:43,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 299 transitions, 3031 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) [2024-06-04 15:14:43,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:43,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:43,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:44,555 INFO L124 PetriNetUnfolderBase]: 2575/4102 cut-off events. [2024-06-04 15:14:44,555 INFO L125 PetriNetUnfolderBase]: For 516382/516384 co-relation queries the response was YES. [2024-06-04 15:14:44,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38695 conditions, 4102 events. 2575/4102 cut-off events. For 516382/516384 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23509 event pairs, 634 based on Foata normal form. 6/4104 useless extension candidates. Maximal degree in co-relation 38582. Up to 3376 conditions per place. [2024-06-04 15:14:44,610 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 106 changer transitions 0/322 dead transitions. [2024-06-04 15:14:44,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 4177 flow [2024-06-04 15:14:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 15:14:44,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-04 15:14:44,611 INFO L175 Difference]: Start difference. First operand has 234 places, 299 transitions, 3031 flow. Second operand 8 states and 153 transitions. [2024-06-04 15:14:44,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 4177 flow [2024-06-04 15:14:45,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 322 transitions, 3947 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:45,338 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3189 flow [2024-06-04 15:14:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3189, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-04 15:14:45,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-04 15:14:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3189 flow [2024-06-04 15:14:45,339 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) [2024-06-04 15:14:45,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:45,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:45,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 15:14:45,339 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)] === [2024-06-04 15:14:45,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1648411140, now seen corresponding path program 9 times [2024-06-04 15:14:45,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:45,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259716607] [2024-06-04 15:14:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:45,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:46,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:46,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259716607] [2024-06-04 15:14:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259716607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:46,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:46,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:46,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560212672] [2024-06-04 15:14:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:46,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:46,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:46,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:46,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:46,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:46,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3189 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) [2024-06-04 15:14:46,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:46,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:46,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:47,041 INFO L124 PetriNetUnfolderBase]: 2585/4116 cut-off events. [2024-06-04 15:14:47,041 INFO L125 PetriNetUnfolderBase]: For 522023/522025 co-relation queries the response was YES. [2024-06-04 15:14:47,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39019 conditions, 4116 events. 2585/4116 cut-off events. For 522023/522025 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23599 event pairs, 648 based on Foata normal form. 4/4116 useless extension candidates. Maximal degree in co-relation 38904. Up to 3382 conditions per place. [2024-06-04 15:14:47,084 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 199 selfloop transitions, 121 changer transitions 0/325 dead transitions. [2024-06-04 15:14:47,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 325 transitions, 4272 flow [2024-06-04 15:14:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 15:14:47,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:14:47,085 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3189 flow. Second operand 8 states and 152 transitions. [2024-06-04 15:14:47,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 325 transitions, 4272 flow [2024-06-04 15:14:47,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 325 transitions, 4063 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 15:14:47,713 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 3301 flow [2024-06-04 15:14:47,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3301, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-04 15:14:47,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-04 15:14:47,714 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 3301 flow [2024-06-04 15:14:47,714 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) [2024-06-04 15:14:47,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:47,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 15:14:47,714 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)] === [2024-06-04 15:14:47,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1568926856, now seen corresponding path program 10 times [2024-06-04 15:14:47,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670987996] [2024-06-04 15:14:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:48,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670987996] [2024-06-04 15:14:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670987996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:48,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:48,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552590357] [2024-06-04 15:14:48,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:48,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:48,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:48,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 3301 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) [2024-06-04 15:14:48,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:48,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:48,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:49,415 INFO L124 PetriNetUnfolderBase]: 2575/4104 cut-off events. [2024-06-04 15:14:49,415 INFO L125 PetriNetUnfolderBase]: For 528995/528997 co-relation queries the response was YES. [2024-06-04 15:14:49,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38887 conditions, 4104 events. 2575/4104 cut-off events. For 528995/528997 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23551 event pairs, 652 based on Foata normal form. 4/4104 useless extension candidates. Maximal degree in co-relation 38771. Up to 3374 conditions per place. [2024-06-04 15:14:49,458 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 120 changer transitions 0/325 dead transitions. [2024-06-04 15:14:49,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 325 transitions, 4315 flow [2024-06-04 15:14:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:14:49,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:14:49,459 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 3301 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:14:49,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 325 transitions, 4315 flow [2024-06-04 15:14:50,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 325 transitions, 4018 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:50,203 INFO L231 Difference]: Finished difference. Result has 245 places, 308 transitions, 3250 flow [2024-06-04 15:14:50,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3250, PETRI_PLACES=245, PETRI_TRANSITIONS=308} [2024-06-04 15:14:50,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-04 15:14:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 308 transitions, 3250 flow [2024-06-04 15:14:50,204 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) [2024-06-04 15:14:50,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:50,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:50,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 15:14:50,204 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)] === [2024-06-04 15:14:50,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1876312290, now seen corresponding path program 11 times [2024-06-04 15:14:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:50,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906345085] [2024-06-04 15:14:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:51,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:51,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906345085] [2024-06-04 15:14:51,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906345085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:51,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:51,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:51,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265601055] [2024-06-04 15:14:51,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:51,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:51,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:51,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:51,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:51,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:51,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 308 transitions, 3250 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) [2024-06-04 15:14:51,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:51,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:51,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:51,917 INFO L124 PetriNetUnfolderBase]: 2569/4094 cut-off events. [2024-06-04 15:14:51,917 INFO L125 PetriNetUnfolderBase]: For 533484/533486 co-relation queries the response was YES. [2024-06-04 15:14:51,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38639 conditions, 4094 events. 2569/4094 cut-off events. For 533484/533486 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23486 event pairs, 621 based on Foata normal form. 4/4094 useless extension candidates. Maximal degree in co-relation 38523. Up to 3371 conditions per place. [2024-06-04 15:14:51,961 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 201 selfloop transitions, 118 changer transitions 0/324 dead transitions. [2024-06-04 15:14:51,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 4110 flow [2024-06-04 15:14:51,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:14:51,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-04 15:14:51,962 INFO L175 Difference]: Start difference. First operand has 245 places, 308 transitions, 3250 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:14:51,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 4110 flow [2024-06-04 15:14:52,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 3660 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-04 15:14:52,702 INFO L231 Difference]: Finished difference. Result has 242 places, 308 transitions, 3042 flow [2024-06-04 15:14:52,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3042, PETRI_PLACES=242, PETRI_TRANSITIONS=308} [2024-06-04 15:14:52,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-04 15:14:52,702 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 308 transitions, 3042 flow [2024-06-04 15:14:52,703 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) [2024-06-04 15:14:52,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:52,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:52,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 15:14:52,703 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)] === [2024-06-04 15:14:52,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1870598370, now seen corresponding path program 12 times [2024-06-04 15:14:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780737237] [2024-06-04 15:14:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780737237] [2024-06-04 15:14:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780737237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:53,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983010480] [2024-06-04 15:14:53,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:53,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:53,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 308 transitions, 3042 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) [2024-06-04 15:14:53,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:53,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:53,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:54,360 INFO L124 PetriNetUnfolderBase]: 2553/4068 cut-off events. [2024-06-04 15:14:54,360 INFO L125 PetriNetUnfolderBase]: For 539126/539128 co-relation queries the response was YES. [2024-06-04 15:14:54,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38062 conditions, 4068 events. 2553/4068 cut-off events. For 539126/539128 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23338 event pairs, 618 based on Foata normal form. 6/4070 useless extension candidates. Maximal degree in co-relation 37946. Up to 3358 conditions per place. [2024-06-04 15:14:54,409 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 208 selfloop transitions, 110 changer transitions 0/323 dead transitions. [2024-06-04 15:14:54,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 323 transitions, 3744 flow [2024-06-04 15:14:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:54,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 15:14:54,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-04 15:14:54,410 INFO L175 Difference]: Start difference. First operand has 242 places, 308 transitions, 3042 flow. Second operand 8 states and 150 transitions. [2024-06-04 15:14:54,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 323 transitions, 3744 flow [2024-06-04 15:14:55,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 323 transitions, 3431 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:55,304 INFO L231 Difference]: Finished difference. Result has 243 places, 308 transitions, 2957 flow [2024-06-04 15:14:55,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2957, PETRI_PLACES=243, PETRI_TRANSITIONS=308} [2024-06-04 15:14:55,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-04 15:14:55,305 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 308 transitions, 2957 flow [2024-06-04 15:14:55,305 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) [2024-06-04 15:14:55,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:55,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:55,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 15:14:55,305 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)] === [2024-06-04 15:14:55,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1884416434, now seen corresponding path program 5 times [2024-06-04 15:14:55,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:55,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071447860] [2024-06-04 15:14:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:55,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:56,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:56,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071447860] [2024-06-04 15:14:56,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071447860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:56,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:56,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909661900] [2024-06-04 15:14:56,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:56,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:56,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:56,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 308 transitions, 2957 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) [2024-06-04 15:14:56,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:56,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:56,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:57,137 INFO L124 PetriNetUnfolderBase]: 2620/4161 cut-off events. [2024-06-04 15:14:57,137 INFO L125 PetriNetUnfolderBase]: For 567363/567365 co-relation queries the response was YES. [2024-06-04 15:14:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39564 conditions, 4161 events. 2620/4161 cut-off events. For 567363/567365 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23793 event pairs, 600 based on Foata normal form. 5/4162 useless extension candidates. Maximal degree in co-relation 39447. Up to 3164 conditions per place. [2024-06-04 15:14:57,186 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 199 selfloop transitions, 144 changer transitions 0/348 dead transitions. [2024-06-04 15:14:57,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 4501 flow [2024-06-04 15:14:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:14:57,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:14:57,187 INFO L175 Difference]: Start difference. First operand has 243 places, 308 transitions, 2957 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:14:57,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 4501 flow [2024-06-04 15:14:58,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 348 transitions, 4223 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 15:14:58,011 INFO L231 Difference]: Finished difference. Result has 245 places, 327 transitions, 3421 flow [2024-06-04 15:14:58,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3421, PETRI_PLACES=245, PETRI_TRANSITIONS=327} [2024-06-04 15:14:58,011 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-04 15:14:58,011 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 327 transitions, 3421 flow [2024-06-04 15:14:58,011 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) [2024-06-04 15:14:58,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:58,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:58,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 15:14:58,012 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)] === [2024-06-04 15:14:58,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1870594774, now seen corresponding path program 6 times [2024-06-04 15:14:58,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:58,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159635205] [2024-06-04 15:14:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159635205] [2024-06-04 15:14:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159635205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:58,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:14:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242655937] [2024-06-04 15:14:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:14:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:14:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:14:59,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:14:59,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 327 transitions, 3421 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) [2024-06-04 15:14:59,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:59,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:14:59,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:59,822 INFO L124 PetriNetUnfolderBase]: 2691/4270 cut-off events. [2024-06-04 15:14:59,822 INFO L125 PetriNetUnfolderBase]: For 612229/612231 co-relation queries the response was YES. [2024-06-04 15:14:59,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42369 conditions, 4270 events. 2691/4270 cut-off events. For 612229/612231 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24473 event pairs, 606 based on Foata normal form. 5/4271 useless extension candidates. Maximal degree in co-relation 42249. Up to 3223 conditions per place. [2024-06-04 15:14:59,875 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 213 selfloop transitions, 143 changer transitions 0/361 dead transitions. [2024-06-04 15:14:59,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 361 transitions, 5216 flow [2024-06-04 15:14:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:14:59,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:14:59,876 INFO L175 Difference]: Start difference. First operand has 245 places, 327 transitions, 3421 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:14:59,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 361 transitions, 5216 flow [2024-06-04 15:15:00,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 361 transitions, 4878 flow, removed 107 selfloop flow, removed 4 redundant places. [2024-06-04 15:15:00,829 INFO L231 Difference]: Finished difference. Result has 252 places, 339 transitions, 3845 flow [2024-06-04 15:15:00,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3845, PETRI_PLACES=252, PETRI_TRANSITIONS=339} [2024-06-04 15:15:00,830 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-04 15:15:00,830 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 339 transitions, 3845 flow [2024-06-04 15:15:00,830 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) [2024-06-04 15:15:00,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:00,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:00,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 15:15:00,830 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)] === [2024-06-04 15:15:00,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash 86418214, now seen corresponding path program 7 times [2024-06-04 15:15:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:00,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144320492] [2024-06-04 15:15:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:01,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:01,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144320492] [2024-06-04 15:15:01,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144320492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:01,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:01,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189572924] [2024-06-04 15:15:01,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:01,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:01,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:01,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:01,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:01,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 339 transitions, 3845 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) [2024-06-04 15:15:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:02,623 INFO L124 PetriNetUnfolderBase]: 2686/4263 cut-off events. [2024-06-04 15:15:02,623 INFO L125 PetriNetUnfolderBase]: For 620377/620379 co-relation queries the response was YES. [2024-06-04 15:15:02,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42703 conditions, 4263 events. 2686/4263 cut-off events. For 620377/620379 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 24432 event pairs, 601 based on Foata normal form. 5/4264 useless extension candidates. Maximal degree in co-relation 42579. Up to 3221 conditions per place. [2024-06-04 15:15:02,672 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 218 selfloop transitions, 138 changer transitions 0/361 dead transitions. [2024-06-04 15:15:02,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 5245 flow [2024-06-04 15:15:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:15:02,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:15:02,674 INFO L175 Difference]: Start difference. First operand has 252 places, 339 transitions, 3845 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:15:02,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 5245 flow [2024-06-04 15:15:03,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4852 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-04 15:15:03,653 INFO L231 Difference]: Finished difference. Result has 257 places, 339 transitions, 3740 flow [2024-06-04 15:15:03,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3740, PETRI_PLACES=257, PETRI_TRANSITIONS=339} [2024-06-04 15:15:03,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-04 15:15:03,654 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 339 transitions, 3740 flow [2024-06-04 15:15:03,654 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) [2024-06-04 15:15:03,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:03,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:03,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 15:15:03,654 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)] === [2024-06-04 15:15:03,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:03,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1470751504, now seen corresponding path program 8 times [2024-06-04 15:15:03,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:03,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757654714] [2024-06-04 15:15:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:03,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:04,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757654714] [2024-06-04 15:15:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757654714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:04,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:04,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:04,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572866567] [2024-06-04 15:15:04,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:04,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:04,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:04,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:04,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:04,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 339 transitions, 3740 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) [2024-06-04 15:15:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:04,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:04,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:05,512 INFO L124 PetriNetUnfolderBase]: 2717/4311 cut-off events. [2024-06-04 15:15:05,512 INFO L125 PetriNetUnfolderBase]: For 638232/638234 co-relation queries the response was YES. [2024-06-04 15:15:05,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43079 conditions, 4311 events. 2717/4311 cut-off events. For 638232/638234 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24728 event pairs, 644 based on Foata normal form. 5/4312 useless extension candidates. Maximal degree in co-relation 42954. Up to 3250 conditions per place. [2024-06-04 15:15:05,564 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 208 selfloop transitions, 156 changer transitions 0/369 dead transitions. [2024-06-04 15:15:05,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 369 transitions, 5386 flow [2024-06-04 15:15:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 15:15:05,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-04 15:15:05,565 INFO L175 Difference]: Start difference. First operand has 257 places, 339 transitions, 3740 flow. Second operand 9 states and 173 transitions. [2024-06-04 15:15:05,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 369 transitions, 5386 flow [2024-06-04 15:15:06,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 369 transitions, 5055 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 15:15:06,491 INFO L231 Difference]: Finished difference. Result has 258 places, 349 transitions, 4142 flow [2024-06-04 15:15:06,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3423, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4142, PETRI_PLACES=258, PETRI_TRANSITIONS=349} [2024-06-04 15:15:06,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-04 15:15:06,491 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 349 transitions, 4142 flow [2024-06-04 15:15:06,491 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) [2024-06-04 15:15:06,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:06,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:06,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 15:15:06,492 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)] === [2024-06-04 15:15:06,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:06,492 INFO L85 PathProgramCache]: Analyzing trace with hash 100228218, now seen corresponding path program 2 times [2024-06-04 15:15:06,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:06,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356764449] [2024-06-04 15:15:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:06,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:07,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:07,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356764449] [2024-06-04 15:15:07,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356764449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:07,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:07,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:07,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968013252] [2024-06-04 15:15:07,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:07,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:07,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:07,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:07,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 349 transitions, 4142 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) [2024-06-04 15:15:07,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:07,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:07,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:08,287 INFO L124 PetriNetUnfolderBase]: 2730/4304 cut-off events. [2024-06-04 15:15:08,288 INFO L125 PetriNetUnfolderBase]: For 655616/655623 co-relation queries the response was YES. [2024-06-04 15:15:08,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43913 conditions, 4304 events. 2730/4304 cut-off events. For 655616/655623 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24390 event pairs, 678 based on Foata normal form. 7/4309 useless extension candidates. Maximal degree in co-relation 43788. Up to 4016 conditions per place. [2024-06-04 15:15:08,455 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 52 changer transitions 0/372 dead transitions. [2024-06-04 15:15:08,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 372 transitions, 5624 flow [2024-06-04 15:15:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-04 15:15:08,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-04 15:15:08,457 INFO L175 Difference]: Start difference. First operand has 258 places, 349 transitions, 4142 flow. Second operand 9 states and 156 transitions. [2024-06-04 15:15:08,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 372 transitions, 5624 flow [2024-06-04 15:15:09,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 372 transitions, 5436 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-04 15:15:09,306 INFO L231 Difference]: Finished difference. Result has 264 places, 358 transitions, 4454 flow [2024-06-04 15:15:09,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4454, PETRI_PLACES=264, PETRI_TRANSITIONS=358} [2024-06-04 15:15:09,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-04 15:15:09,307 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 358 transitions, 4454 flow [2024-06-04 15:15:09,307 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) [2024-06-04 15:15:09,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:09,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:09,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 15:15:09,307 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)] === [2024-06-04 15:15:09,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -313091186, now seen corresponding path program 9 times [2024-06-04 15:15:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:09,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891671772] [2024-06-04 15:15:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:10,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:10,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891671772] [2024-06-04 15:15:10,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891671772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:10,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:10,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:10,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760501212] [2024-06-04 15:15:10,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:10,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:10,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:10,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 358 transitions, 4454 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) [2024-06-04 15:15:10,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:10,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:10,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:11,169 INFO L124 PetriNetUnfolderBase]: 2745/4351 cut-off events. [2024-06-04 15:15:11,169 INFO L125 PetriNetUnfolderBase]: For 671832/671834 co-relation queries the response was YES. [2024-06-04 15:15:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44165 conditions, 4351 events. 2745/4351 cut-off events. For 671832/671834 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24929 event pairs, 643 based on Foata normal form. 5/4352 useless extension candidates. Maximal degree in co-relation 44038. Up to 3282 conditions per place. [2024-06-04 15:15:11,226 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 234 selfloop transitions, 144 changer transitions 0/383 dead transitions. [2024-06-04 15:15:11,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 383 transitions, 6095 flow [2024-06-04 15:15:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 15:15:11,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-04 15:15:11,228 INFO L175 Difference]: Start difference. First operand has 264 places, 358 transitions, 4454 flow. Second operand 9 states and 175 transitions. [2024-06-04 15:15:11,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 383 transitions, 6095 flow [2024-06-04 15:15:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 383 transitions, 5921 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-04 15:15:12,121 INFO L231 Difference]: Finished difference. Result has 269 places, 362 transitions, 4702 flow [2024-06-04 15:15:12,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=269, PETRI_TRANSITIONS=362} [2024-06-04 15:15:12,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-04 15:15:12,122 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 362 transitions, 4702 flow [2024-06-04 15:15:12,122 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) [2024-06-04 15:15:12,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:12,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 15:15:12,123 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)] === [2024-06-04 15:15:12,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash 86418648, now seen corresponding path program 3 times [2024-06-04 15:15:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936750440] [2024-06-04 15:15:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:13,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:13,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936750440] [2024-06-04 15:15:13,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936750440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:13,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:13,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:13,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226705139] [2024-06-04 15:15:13,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:13,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:13,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:13,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:13,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 362 transitions, 4702 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) [2024-06-04 15:15:13,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:13,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:13,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:13,943 INFO L124 PetriNetUnfolderBase]: 2750/4338 cut-off events. [2024-06-04 15:15:13,943 INFO L125 PetriNetUnfolderBase]: For 679587/679594 co-relation queries the response was YES. [2024-06-04 15:15:13,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44921 conditions, 4338 events. 2750/4338 cut-off events. For 679587/679594 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24655 event pairs, 682 based on Foata normal form. 7/4343 useless extension candidates. Maximal degree in co-relation 44792. Up to 4043 conditions per place. [2024-06-04 15:15:13,999 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 53 changer transitions 0/379 dead transitions. [2024-06-04 15:15:13,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 379 transitions, 5940 flow [2024-06-04 15:15:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:15:14,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 15:15:14,000 INFO L175 Difference]: Start difference. First operand has 269 places, 362 transitions, 4702 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:15:14,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 379 transitions, 5940 flow [2024-06-04 15:15:15,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 379 transitions, 5476 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-04 15:15:15,346 INFO L231 Difference]: Finished difference. Result has 269 places, 365 transitions, 4468 flow [2024-06-04 15:15:15,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4468, PETRI_PLACES=269, PETRI_TRANSITIONS=365} [2024-06-04 15:15:15,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-04 15:15:15,346 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 365 transitions, 4468 flow [2024-06-04 15:15:15,346 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) [2024-06-04 15:15:15,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:15,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:15,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 15:15:15,347 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)] === [2024-06-04 15:15:15,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1471109554, now seen corresponding path program 10 times [2024-06-04 15:15:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:15,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210676169] [2024-06-04 15:15:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:15,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210676169] [2024-06-04 15:15:16,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210676169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:16,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:16,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:16,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458601763] [2024-06-04 15:15:16,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:16,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:16,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:16,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:16,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 365 transitions, 4468 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) [2024-06-04 15:15:16,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:16,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:16,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:17,238 INFO L124 PetriNetUnfolderBase]: 2745/4356 cut-off events. [2024-06-04 15:15:17,238 INFO L125 PetriNetUnfolderBase]: For 687260/687262 co-relation queries the response was YES. [2024-06-04 15:15:17,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43947 conditions, 4356 events. 2745/4356 cut-off events. For 687260/687262 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25013 event pairs, 641 based on Foata normal form. 5/4357 useless extension candidates. Maximal degree in co-relation 43820. Up to 3287 conditions per place. [2024-06-04 15:15:17,294 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 237 selfloop transitions, 143 changer transitions 0/385 dead transitions. [2024-06-04 15:15:17,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5828 flow [2024-06-04 15:15:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 15:15:17,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-04 15:15:17,295 INFO L175 Difference]: Start difference. First operand has 269 places, 365 transitions, 4468 flow. Second operand 9 states and 173 transitions. [2024-06-04 15:15:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5828 flow [2024-06-04 15:15:18,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 385 transitions, 5550 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:18,418 INFO L231 Difference]: Finished difference. Result has 272 places, 365 transitions, 4484 flow [2024-06-04 15:15:18,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4484, PETRI_PLACES=272, PETRI_TRANSITIONS=365} [2024-06-04 15:15:18,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-04 15:15:18,419 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 365 transitions, 4484 flow [2024-06-04 15:15:18,419 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) [2024-06-04 15:15:18,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:18,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:18,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 15:15:18,419 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)] === [2024-06-04 15:15:18,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1471109988, now seen corresponding path program 4 times [2024-06-04 15:15:18,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:18,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354588902] [2024-06-04 15:15:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354588902] [2024-06-04 15:15:19,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354588902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:19,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:19,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596671874] [2024-06-04 15:15:19,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:19,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:19,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:19,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 365 transitions, 4484 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) [2024-06-04 15:15:19,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:19,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:19,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:20,224 INFO L124 PetriNetUnfolderBase]: 2742/4328 cut-off events. [2024-06-04 15:15:20,225 INFO L125 PetriNetUnfolderBase]: For 690799/690806 co-relation queries the response was YES. [2024-06-04 15:15:20,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44234 conditions, 4328 events. 2742/4328 cut-off events. For 690799/690806 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24559 event pairs, 682 based on Foata normal form. 7/4333 useless extension candidates. Maximal degree in co-relation 44106. Up to 4034 conditions per place. [2024-06-04 15:15:20,279 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 52 changer transitions 0/378 dead transitions. [2024-06-04 15:15:20,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 378 transitions, 5434 flow [2024-06-04 15:15:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 15:15:20,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-04 15:15:20,280 INFO L175 Difference]: Start difference. First operand has 272 places, 365 transitions, 4484 flow. Second operand 9 states and 157 transitions. [2024-06-04 15:15:20,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 378 transitions, 5434 flow [2024-06-04 15:15:21,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 378 transitions, 5077 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-04 15:15:21,261 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4237 flow [2024-06-04 15:15:21,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4237, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-04 15:15:21,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-04 15:15:21,262 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4237 flow [2024-06-04 15:15:21,262 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) [2024-06-04 15:15:21,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:21,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:21,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 15:15:21,262 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)] === [2024-06-04 15:15:21,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 100242168, now seen corresponding path program 5 times [2024-06-04 15:15:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:21,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230195341] [2024-06-04 15:15:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:22,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230195341] [2024-06-04 15:15:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230195341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:22,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:22,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696700815] [2024-06-04 15:15:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:22,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:22,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4237 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) [2024-06-04 15:15:22,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:22,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:22,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:23,217 INFO L124 PetriNetUnfolderBase]: 2739/4324 cut-off events. [2024-06-04 15:15:23,217 INFO L125 PetriNetUnfolderBase]: For 697921/697921 co-relation queries the response was YES. [2024-06-04 15:15:23,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43666 conditions, 4324 events. 2739/4324 cut-off events. For 697921/697921 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24547 event pairs, 673 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 43537. Up to 4085 conditions per place. [2024-06-04 15:15:23,269 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 352 selfloop transitions, 20 changer transitions 0/377 dead transitions. [2024-06-04 15:15:23,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 377 transitions, 5009 flow [2024-06-04 15:15:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:15:23,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-04 15:15:23,270 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4237 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:15:23,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 377 transitions, 5009 flow [2024-06-04 15:15:24,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 377 transitions, 4739 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-06-04 15:15:24,377 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4013 flow [2024-06-04 15:15:24,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4013, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-04 15:15:24,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-04 15:15:24,378 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4013 flow [2024-06-04 15:15:24,378 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) [2024-06-04 15:15:24,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:24,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 15:15:24,378 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)] === [2024-06-04 15:15:24,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1321205662, now seen corresponding path program 1 times [2024-06-04 15:15:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084392603] [2024-06-04 15:15:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:25,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084392603] [2024-06-04 15:15:25,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084392603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:25,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:25,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:15:25,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238152625] [2024-06-04 15:15:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:25,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:15:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:15:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:15:25,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:15:25,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4013 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:25,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:25,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:15:25,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:26,405 INFO L124 PetriNetUnfolderBase]: 2546/4130 cut-off events. [2024-06-04 15:15:26,405 INFO L125 PetriNetUnfolderBase]: For 721088/721092 co-relation queries the response was YES. [2024-06-04 15:15:26,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42598 conditions, 4130 events. 2546/4130 cut-off events. For 721088/721092 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24397 event pairs, 553 based on Foata normal form. 4/4124 useless extension candidates. Maximal degree in co-relation 42468. Up to 3503 conditions per place. [2024-06-04 15:15:26,457 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 321 selfloop transitions, 15 changer transitions 0/389 dead transitions. [2024-06-04 15:15:26,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 389 transitions, 4805 flow [2024-06-04 15:15:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:15:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:15:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 15:15:26,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-04 15:15:26,458 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4013 flow. Second operand 8 states and 157 transitions. [2024-06-04 15:15:26,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 389 transitions, 4805 flow [2024-06-04 15:15:27,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 389 transitions, 4751 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 15:15:27,641 INFO L231 Difference]: Finished difference. Result has 274 places, 367 transitions, 4064 flow [2024-06-04 15:15:27,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=274, PETRI_TRANSITIONS=367} [2024-06-04 15:15:27,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-04 15:15:27,642 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 367 transitions, 4064 flow [2024-06-04 15:15:27,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:27,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:27,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:27,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 15:15:27,642 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)] === [2024-06-04 15:15:27,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash 505086976, now seen corresponding path program 2 times [2024-06-04 15:15:27,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:27,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533481536] [2024-06-04 15:15:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:27,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533481536] [2024-06-04 15:15:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533481536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:28,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:28,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:15:28,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411798567] [2024-06-04 15:15:28,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:28,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:15:28,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:15:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:15:28,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:15:28,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 367 transitions, 4064 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:28,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:28,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:15:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:29,801 INFO L124 PetriNetUnfolderBase]: 2554/4142 cut-off events. [2024-06-04 15:15:29,801 INFO L125 PetriNetUnfolderBase]: For 736735/736739 co-relation queries the response was YES. [2024-06-04 15:15:29,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43044 conditions, 4142 events. 2554/4142 cut-off events. For 736735/736739 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24475 event pairs, 589 based on Foata normal form. 4/4136 useless extension candidates. Maximal degree in co-relation 42913. Up to 3532 conditions per place. [2024-06-04 15:15:29,853 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 16 changer transitions 0/387 dead transitions. [2024-06-04 15:15:29,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 387 transitions, 4846 flow [2024-06-04 15:15:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:15:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:15:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-04 15:15:29,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-04 15:15:29,854 INFO L175 Difference]: Start difference. First operand has 274 places, 367 transitions, 4064 flow. Second operand 8 states and 154 transitions. [2024-06-04 15:15:29,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 387 transitions, 4846 flow [2024-06-04 15:15:31,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 387 transitions, 4757 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:31,028 INFO L231 Difference]: Finished difference. Result has 276 places, 369 transitions, 4086 flow [2024-06-04 15:15:31,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4086, PETRI_PLACES=276, PETRI_TRANSITIONS=369} [2024-06-04 15:15:31,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-04 15:15:31,029 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 369 transitions, 4086 flow [2024-06-04 15:15:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:31,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:31,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:31,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 15:15:31,029 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)] === [2024-06-04 15:15:31,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1324067582, now seen corresponding path program 1 times [2024-06-04 15:15:31,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:31,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941315875] [2024-06-04 15:15:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:31,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:32,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:32,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941315875] [2024-06-04 15:15:32,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941315875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:32,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:32,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251481081] [2024-06-04 15:15:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:32,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:32,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:15:32,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 369 transitions, 4086 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:32,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:32,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:15:32,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:33,188 INFO L124 PetriNetUnfolderBase]: 2670/4261 cut-off events. [2024-06-04 15:15:33,188 INFO L125 PetriNetUnfolderBase]: For 741528/741528 co-relation queries the response was YES. [2024-06-04 15:15:33,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43568 conditions, 4261 events. 2670/4261 cut-off events. For 741528/741528 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24551 event pairs, 639 based on Foata normal form. 2/4262 useless extension candidates. Maximal degree in co-relation 43436. Up to 3818 conditions per place. [2024-06-04 15:15:33,241 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 20 changer transitions 0/390 dead transitions. [2024-06-04 15:15:33,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 390 transitions, 4948 flow [2024-06-04 15:15:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:15:33,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:15:33,242 INFO L175 Difference]: Start difference. First operand has 276 places, 369 transitions, 4086 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:15:33,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 390 transitions, 4948 flow [2024-06-04 15:15:34,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 390 transitions, 4853 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:34,463 INFO L231 Difference]: Finished difference. Result has 279 places, 372 transitions, 4133 flow [2024-06-04 15:15:34,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4133, PETRI_PLACES=279, PETRI_TRANSITIONS=372} [2024-06-04 15:15:34,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-04 15:15:34,463 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 372 transitions, 4133 flow [2024-06-04 15:15:34,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:34,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:34,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:34,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:15:34,464 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)] === [2024-06-04 15:15:34,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash 48494752, now seen corresponding path program 3 times [2024-06-04 15:15:34,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:34,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747700784] [2024-06-04 15:15:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:35,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:35,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747700784] [2024-06-04 15:15:35,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747700784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:15:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476472713] [2024-06-04 15:15:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:15:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:15:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:15:35,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:15:35,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 372 transitions, 4133 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:35,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:35,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:15:35,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:36,489 INFO L124 PetriNetUnfolderBase]: 2554/4146 cut-off events. [2024-06-04 15:15:36,489 INFO L125 PetriNetUnfolderBase]: For 761449/761457 co-relation queries the response was YES. [2024-06-04 15:15:36,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43379 conditions, 4146 events. 2554/4146 cut-off events. For 761449/761457 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24500 event pairs, 583 based on Foata normal form. 6/4136 useless extension candidates. Maximal degree in co-relation 43246. Up to 3543 conditions per place. [2024-06-04 15:15:36,541 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 323 selfloop transitions, 16 changer transitions 0/392 dead transitions. [2024-06-04 15:15:36,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 392 transitions, 4952 flow [2024-06-04 15:15:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:15:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:15:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:15:36,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:15:36,542 INFO L175 Difference]: Start difference. First operand has 279 places, 372 transitions, 4133 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:15:36,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 392 transitions, 4952 flow [2024-06-04 15:15:37,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 392 transitions, 4838 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-04 15:15:37,904 INFO L231 Difference]: Finished difference. Result has 281 places, 377 transitions, 4171 flow [2024-06-04 15:15:37,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4171, PETRI_PLACES=281, PETRI_TRANSITIONS=377} [2024-06-04 15:15:37,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-04 15:15:37,905 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 377 transitions, 4171 flow [2024-06-04 15:15:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:37,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:37,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:37,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:15:37,905 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)] === [2024-06-04 15:15:37,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:37,905 INFO L85 PathProgramCache]: Analyzing trace with hash -135947328, now seen corresponding path program 4 times [2024-06-04 15:15:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:37,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052934210] [2024-06-04 15:15:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052934210] [2024-06-04 15:15:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052934210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:38,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:38,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:15:38,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268653100] [2024-06-04 15:15:38,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:38,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:15:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:15:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:15:39,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-04 15:15:39,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 377 transitions, 4171 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:39,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:39,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-04 15:15:39,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:39,970 INFO L124 PetriNetUnfolderBase]: 2549/4140 cut-off events. [2024-06-04 15:15:39,970 INFO L125 PetriNetUnfolderBase]: For 768386/768400 co-relation queries the response was YES. [2024-06-04 15:15:40,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43452 conditions, 4140 events. 2549/4140 cut-off events. For 768386/768400 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24490 event pairs, 582 based on Foata normal form. 10/4128 useless extension candidates. Maximal degree in co-relation 43317. Up to 3527 conditions per place. [2024-06-04 15:15:40,025 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 318 selfloop transitions, 23 changer transitions 0/394 dead transitions. [2024-06-04 15:15:40,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 394 transitions, 4992 flow [2024-06-04 15:15:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:15:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:15:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 15:15:40,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-04 15:15:40,026 INFO L175 Difference]: Start difference. First operand has 281 places, 377 transitions, 4171 flow. Second operand 8 states and 151 transitions. [2024-06-04 15:15:40,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 394 transitions, 4992 flow [2024-06-04 15:15:41,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 394 transitions, 4885 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:41,267 INFO L231 Difference]: Finished difference. Result has 285 places, 382 transitions, 4236 flow [2024-06-04 15:15:41,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4064, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=285, PETRI_TRANSITIONS=382} [2024-06-04 15:15:41,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-04 15:15:41,267 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 382 transitions, 4236 flow [2024-06-04 15:15:41,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:41,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:41,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:41,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:15:41,268 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)] === [2024-06-04 15:15:41,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 100720312, now seen corresponding path program 1 times [2024-06-04 15:15:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:41,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413540263] [2024-06-04 15:15:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:41,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:42,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:42,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413540263] [2024-06-04 15:15:42,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413540263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:42,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:42,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:15:42,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878824039] [2024-06-04 15:15:42,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:42,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:15:42,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:42,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:15:42,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:15:42,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:42,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 382 transitions, 4236 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:42,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:42,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:42,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:43,640 INFO L124 PetriNetUnfolderBase]: 2747/4346 cut-off events. [2024-06-04 15:15:43,640 INFO L125 PetriNetUnfolderBase]: For 774778/774778 co-relation queries the response was YES. [2024-06-04 15:15:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44819 conditions, 4346 events. 2747/4346 cut-off events. For 774778/774778 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24812 event pairs, 659 based on Foata normal form. 2/4347 useless extension candidates. Maximal degree in co-relation 44682. Up to 4093 conditions per place. [2024-06-04 15:15:43,697 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 371 selfloop transitions, 22 changer transitions 0/398 dead transitions. [2024-06-04 15:15:43,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 398 transitions, 5166 flow [2024-06-04 15:15:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:15:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:15:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-04 15:15:43,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-04 15:15:43,698 INFO L175 Difference]: Start difference. First operand has 285 places, 382 transitions, 4236 flow. Second operand 10 states and 162 transitions. [2024-06-04 15:15:43,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 398 transitions, 5166 flow [2024-06-04 15:15:45,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 398 transitions, 5039 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:45,266 INFO L231 Difference]: Finished difference. Result has 290 places, 384 transitions, 4274 flow [2024-06-04 15:15:45,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4274, PETRI_PLACES=290, PETRI_TRANSITIONS=384} [2024-06-04 15:15:45,267 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-04 15:15:45,267 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 384 transitions, 4274 flow [2024-06-04 15:15:45,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:45,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:45,268 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] [2024-06-04 15:15:45,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:15:45,268 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)] === [2024-06-04 15:15:45,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1483164742, now seen corresponding path program 1 times [2024-06-04 15:15:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:45,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869314475] [2024-06-04 15:15:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:45,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:46,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:46,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869314475] [2024-06-04 15:15:46,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869314475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:46,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:46,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518059690] [2024-06-04 15:15:46,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:46,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:46,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:46,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:46,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:46,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:46,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 384 transitions, 4274 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) [2024-06-04 15:15:46,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:46,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:46,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:47,299 INFO L124 PetriNetUnfolderBase]: 2783/4401 cut-off events. [2024-06-04 15:15:47,299 INFO L125 PetriNetUnfolderBase]: For 820063/820065 co-relation queries the response was YES. [2024-06-04 15:15:47,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45453 conditions, 4401 events. 2783/4401 cut-off events. For 820063/820065 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25109 event pairs, 519 based on Foata normal form. 12/4412 useless extension candidates. Maximal degree in co-relation 45315. Up to 3950 conditions per place. [2024-06-04 15:15:47,354 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 390 selfloop transitions, 27 changer transitions 0/422 dead transitions. [2024-06-04 15:15:47,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 422 transitions, 5392 flow [2024-06-04 15:15:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 15:15:47,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:15:47,355 INFO L175 Difference]: Start difference. First operand has 290 places, 384 transitions, 4274 flow. Second operand 9 states and 174 transitions. [2024-06-04 15:15:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 422 transitions, 5392 flow [2024-06-04 15:15:48,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 422 transitions, 5235 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-04 15:15:48,793 INFO L231 Difference]: Finished difference. Result has 291 places, 386 transitions, 4270 flow [2024-06-04 15:15:48,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4117, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4270, PETRI_PLACES=291, PETRI_TRANSITIONS=386} [2024-06-04 15:15:48,793 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-04 15:15:48,793 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 386 transitions, 4270 flow [2024-06-04 15:15:48,793 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) [2024-06-04 15:15:48,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:48,793 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] [2024-06-04 15:15:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:15:48,794 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)] === [2024-06-04 15:15:48,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1748862022, now seen corresponding path program 2 times [2024-06-04 15:15:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271436713] [2024-06-04 15:15:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271436713] [2024-06-04 15:15:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271436713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:49,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:49,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877281733] [2024-06-04 15:15:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:49,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:49,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:49,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:49,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:49,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 386 transitions, 4270 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) [2024-06-04 15:15:49,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:49,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:49,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:50,982 INFO L124 PetriNetUnfolderBase]: 2899/4583 cut-off events. [2024-06-04 15:15:50,983 INFO L125 PetriNetUnfolderBase]: For 903631/903633 co-relation queries the response was YES. [2024-06-04 15:15:51,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 4583 events. 2899/4583 cut-off events. For 903631/903633 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26361 event pairs, 689 based on Foata normal form. 14/4596 useless extension candidates. Maximal degree in co-relation 48276. Up to 4060 conditions per place. [2024-06-04 15:15:51,041 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 388 selfloop transitions, 33 changer transitions 0/426 dead transitions. [2024-06-04 15:15:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 426 transitions, 5732 flow [2024-06-04 15:15:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 15:15:51,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-04 15:15:51,042 INFO L175 Difference]: Start difference. First operand has 291 places, 386 transitions, 4270 flow. Second operand 9 states and 177 transitions. [2024-06-04 15:15:51,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 426 transitions, 5732 flow [2024-06-04 15:15:52,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 426 transitions, 5613 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 15:15:52,452 INFO L231 Difference]: Finished difference. Result has 293 places, 390 transitions, 4414 flow [2024-06-04 15:15:52,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4151, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4414, PETRI_PLACES=293, PETRI_TRANSITIONS=390} [2024-06-04 15:15:52,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-04 15:15:52,452 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 390 transitions, 4414 flow [2024-06-04 15:15:52,452 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) [2024-06-04 15:15:52,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:52,453 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] [2024-06-04 15:15:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:15:52,453 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)] === [2024-06-04 15:15:52,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1749188452, now seen corresponding path program 3 times [2024-06-04 15:15:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:52,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650743947] [2024-06-04 15:15:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650743947] [2024-06-04 15:15:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650743947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:53,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:53,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908866104] [2024-06-04 15:15:53,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:53,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:53,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:53,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 390 transitions, 4414 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) [2024-06-04 15:15:53,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:53,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:53,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:54,657 INFO L124 PetriNetUnfolderBase]: 2871/4545 cut-off events. [2024-06-04 15:15:54,658 INFO L125 PetriNetUnfolderBase]: For 869566/869568 co-relation queries the response was YES. [2024-06-04 15:15:54,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47101 conditions, 4545 events. 2871/4545 cut-off events. For 869566/869568 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26155 event pairs, 703 based on Foata normal form. 14/4558 useless extension candidates. Maximal degree in co-relation 46961. Up to 4158 conditions per place. [2024-06-04 15:15:54,717 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 386 selfloop transitions, 30 changer transitions 0/421 dead transitions. [2024-06-04 15:15:54,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 5416 flow [2024-06-04 15:15:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:54,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:15:54,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:15:54,718 INFO L175 Difference]: Start difference. First operand has 293 places, 390 transitions, 4414 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:15:54,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 5416 flow [2024-06-04 15:15:56,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 421 transitions, 5239 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:56,361 INFO L231 Difference]: Finished difference. Result has 297 places, 390 transitions, 4303 flow [2024-06-04 15:15:56,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4303, PETRI_PLACES=297, PETRI_TRANSITIONS=390} [2024-06-04 15:15:56,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-04 15:15:56,361 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 390 transitions, 4303 flow [2024-06-04 15:15:56,361 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) [2024-06-04 15:15:56,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:56,361 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] [2024-06-04 15:15:56,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:15:56,362 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)] === [2024-06-04 15:15:56,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:56,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1749200356, now seen corresponding path program 1 times [2024-06-04 15:15:56,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:56,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729414213] [2024-06-04 15:15:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:56,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:57,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729414213] [2024-06-04 15:15:57,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729414213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:57,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:57,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:15:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120423287] [2024-06-04 15:15:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:57,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:15:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:15:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:15:57,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:15:57,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 390 transitions, 4303 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:57,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:57,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:15:57,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:58,539 INFO L124 PetriNetUnfolderBase]: 2886/4568 cut-off events. [2024-06-04 15:15:58,539 INFO L125 PetriNetUnfolderBase]: For 840641/840643 co-relation queries the response was YES. [2024-06-04 15:15:58,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47222 conditions, 4568 events. 2886/4568 cut-off events. For 840641/840643 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 26339 event pairs, 704 based on Foata normal form. 5/4572 useless extension candidates. Maximal degree in co-relation 47080. Up to 4205 conditions per place. [2024-06-04 15:15:58,597 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 382 selfloop transitions, 36 changer transitions 0/423 dead transitions. [2024-06-04 15:15:58,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 423 transitions, 5411 flow [2024-06-04 15:15:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:15:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:15:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-04 15:15:58,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-04 15:15:58,599 INFO L175 Difference]: Start difference. First operand has 297 places, 390 transitions, 4303 flow. Second operand 10 states and 186 transitions. [2024-06-04 15:15:58,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 423 transitions, 5411 flow [2024-06-04 15:16:00,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 423 transitions, 5345 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 15:16:00,328 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4478 flow [2024-06-04 15:16:00,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4478, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-04 15:16:00,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-04 15:16:00,329 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4478 flow [2024-06-04 15:16:00,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:00,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:00,330 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] [2024-06-04 15:16:00,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:16:00,330 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)] === [2024-06-04 15:16:00,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:00,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2052761090, now seen corresponding path program 4 times [2024-06-04 15:16:00,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:00,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356908734] [2024-06-04 15:16:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:00,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:01,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:01,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356908734] [2024-06-04 15:16:01,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356908734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:01,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:01,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619440656] [2024-06-04 15:16:01,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:01,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:01,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:01,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:01,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4478 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) [2024-06-04 15:16:01,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:01,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:01,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:02,518 INFO L124 PetriNetUnfolderBase]: 2930/4652 cut-off events. [2024-06-04 15:16:02,518 INFO L125 PetriNetUnfolderBase]: For 905895/905897 co-relation queries the response was YES. [2024-06-04 15:16:02,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48540 conditions, 4652 events. 2930/4652 cut-off events. For 905895/905897 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27024 event pairs, 698 based on Foata normal form. 14/4665 useless extension candidates. Maximal degree in co-relation 48397. Up to 4100 conditions per place. [2024-06-04 15:16:02,582 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 356 selfloop transitions, 61 changer transitions 0/422 dead transitions. [2024-06-04 15:16:02,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 422 transitions, 5584 flow [2024-06-04 15:16:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:16:02,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:16:02,584 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4478 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:16:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 422 transitions, 5584 flow [2024-06-04 15:16:04,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 422 transitions, 5371 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-04 15:16:04,239 INFO L231 Difference]: Finished difference. Result has 300 places, 396 transitions, 4497 flow [2024-06-04 15:16:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4497, PETRI_PLACES=300, PETRI_TRANSITIONS=396} [2024-06-04 15:16:04,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-04 15:16:04,240 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 396 transitions, 4497 flow [2024-06-04 15:16:04,240 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) [2024-06-04 15:16:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:04,240 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] [2024-06-04 15:16:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:16:04,241 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)] === [2024-06-04 15:16:04,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:04,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2052434660, now seen corresponding path program 5 times [2024-06-04 15:16:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:04,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601700366] [2024-06-04 15:16:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:05,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:05,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601700366] [2024-06-04 15:16:05,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601700366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:05,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:05,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:05,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794749657] [2024-06-04 15:16:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:05,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:05,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:05,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 396 transitions, 4497 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) [2024-06-04 15:16:05,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:05,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:05,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:06,401 INFO L124 PetriNetUnfolderBase]: 3046/4824 cut-off events. [2024-06-04 15:16:06,401 INFO L125 PetriNetUnfolderBase]: For 988472/988474 co-relation queries the response was YES. [2024-06-04 15:16:06,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51733 conditions, 4824 events. 3046/4824 cut-off events. For 988472/988474 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28106 event pairs, 708 based on Foata normal form. 14/4837 useless extension candidates. Maximal degree in co-relation 51589. Up to 4090 conditions per place. [2024-06-04 15:16:06,467 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 360 selfloop transitions, 66 changer transitions 0/431 dead transitions. [2024-06-04 15:16:06,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 431 transitions, 6003 flow [2024-06-04 15:16:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 15:16:06,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:16:06,468 INFO L175 Difference]: Start difference. First operand has 300 places, 396 transitions, 4497 flow. Second operand 9 states and 174 transitions. [2024-06-04 15:16:06,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 431 transitions, 6003 flow [2024-06-04 15:16:08,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 431 transitions, 5809 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-04 15:16:08,090 INFO L231 Difference]: Finished difference. Result has 302 places, 400 transitions, 4652 flow [2024-06-04 15:16:08,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4303, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4652, PETRI_PLACES=302, PETRI_TRANSITIONS=400} [2024-06-04 15:16:08,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-04 15:16:08,091 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 400 transitions, 4652 flow [2024-06-04 15:16:08,091 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) [2024-06-04 15:16:08,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:08,091 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] [2024-06-04 15:16:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:16:08,091 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)] === [2024-06-04 15:16:08,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1552973264, now seen corresponding path program 6 times [2024-06-04 15:16:08,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:08,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12957836] [2024-06-04 15:16:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:08,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:08,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:08,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12957836] [2024-06-04 15:16:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12957836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:08,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:08,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:08,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072282174] [2024-06-04 15:16:08,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:09,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:09,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 400 transitions, 4652 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) [2024-06-04 15:16:09,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:09,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:09,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:10,138 INFO L124 PetriNetUnfolderBase]: 3018/4790 cut-off events. [2024-06-04 15:16:10,138 INFO L125 PetriNetUnfolderBase]: For 949194/949196 co-relation queries the response was YES. [2024-06-04 15:16:10,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 4790 events. 3018/4790 cut-off events. For 949194/949196 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28026 event pairs, 716 based on Foata normal form. 14/4803 useless extension candidates. Maximal degree in co-relation 50160. Up to 4236 conditions per place. [2024-06-04 15:16:10,204 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 361 selfloop transitions, 60 changer transitions 0/426 dead transitions. [2024-06-04 15:16:10,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 426 transitions, 5666 flow [2024-06-04 15:16:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:16:10,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:16:10,206 INFO L175 Difference]: Start difference. First operand has 302 places, 400 transitions, 4652 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:16:10,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 426 transitions, 5666 flow [2024-06-04 15:16:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 426 transitions, 5435 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:12,021 INFO L231 Difference]: Finished difference. Result has 306 places, 400 transitions, 4547 flow [2024-06-04 15:16:12,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4547, PETRI_PLACES=306, PETRI_TRANSITIONS=400} [2024-06-04 15:16:12,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-04 15:16:12,022 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 400 transitions, 4547 flow [2024-06-04 15:16:12,022 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) [2024-06-04 15:16:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:12,022 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] [2024-06-04 15:16:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:16:12,023 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)] === [2024-06-04 15:16:12,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash 545552406, now seen corresponding path program 1 times [2024-06-04 15:16:12,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655563028] [2024-06-04 15:16:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:12,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:13,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:13,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655563028] [2024-06-04 15:16:13,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655563028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:13,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:13,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339712035] [2024-06-04 15:16:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:13,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:16:13,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 400 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:13,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:13,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:16:13,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:14,137 INFO L124 PetriNetUnfolderBase]: 2877/4637 cut-off events. [2024-06-04 15:16:14,137 INFO L125 PetriNetUnfolderBase]: For 906294/906302 co-relation queries the response was YES. [2024-06-04 15:16:14,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49189 conditions, 4637 events. 2877/4637 cut-off events. For 906294/906302 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 27720 event pairs, 706 based on Foata normal form. 7/4625 useless extension candidates. Maximal degree in co-relation 49042. Up to 3961 conditions per place. [2024-06-04 15:16:14,203 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 39 changer transitions 0/429 dead transitions. [2024-06-04 15:16:14,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 429 transitions, 5523 flow [2024-06-04 15:16:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:16:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:16:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-04 15:16:14,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-04 15:16:14,204 INFO L175 Difference]: Start difference. First operand has 306 places, 400 transitions, 4547 flow. Second operand 8 states and 159 transitions. [2024-06-04 15:16:14,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 429 transitions, 5523 flow [2024-06-04 15:16:16,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 429 transitions, 5389 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:16:16,431 INFO L231 Difference]: Finished difference. Result has 306 places, 406 transitions, 4639 flow [2024-06-04 15:16:16,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4639, PETRI_PLACES=306, PETRI_TRANSITIONS=406} [2024-06-04 15:16:16,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-04 15:16:16,431 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 406 transitions, 4639 flow [2024-06-04 15:16:16,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:16,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:16,431 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] [2024-06-04 15:16:16,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:16:16,431 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)] === [2024-06-04 15:16:16,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1534930668, now seen corresponding path program 2 times [2024-06-04 15:16:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:16,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407563697] [2024-06-04 15:16:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:16,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:17,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:17,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407563697] [2024-06-04 15:16:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407563697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:17,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:17,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:17,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832456060] [2024-06-04 15:16:17,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:17,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:17,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:17,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:16:17,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 406 transitions, 4639 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:17,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:17,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:16:17,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:18,678 INFO L124 PetriNetUnfolderBase]: 3006/4857 cut-off events. [2024-06-04 15:16:18,678 INFO L125 PetriNetUnfolderBase]: For 935411/935419 co-relation queries the response was YES. [2024-06-04 15:16:18,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51357 conditions, 4857 events. 3006/4857 cut-off events. For 935411/935419 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29199 event pairs, 736 based on Foata normal form. 7/4843 useless extension candidates. Maximal degree in co-relation 51209. Up to 4051 conditions per place. [2024-06-04 15:16:18,747 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 66 changer transitions 0/462 dead transitions. [2024-06-04 15:16:18,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 462 transitions, 6428 flow [2024-06-04 15:16:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:16:18,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:16:18,748 INFO L175 Difference]: Start difference. First operand has 306 places, 406 transitions, 4639 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:16:18,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 462 transitions, 6428 flow [2024-06-04 15:16:20,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 462 transitions, 6112 flow, removed 104 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:20,737 INFO L231 Difference]: Finished difference. Result has 314 places, 438 transitions, 5175 flow [2024-06-04 15:16:20,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4465, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5175, PETRI_PLACES=314, PETRI_TRANSITIONS=438} [2024-06-04 15:16:20,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-04 15:16:20,737 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 438 transitions, 5175 flow [2024-06-04 15:16:20,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:20,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:20,738 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] [2024-06-04 15:16:20,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:16:20,738 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)] === [2024-06-04 15:16:20,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1144307848, now seen corresponding path program 3 times [2024-06-04 15:16:20,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:20,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619677314] [2024-06-04 15:16:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:20,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:21,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619677314] [2024-06-04 15:16:21,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619677314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:21,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:21,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:21,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205725089] [2024-06-04 15:16:21,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:21,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:21,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:21,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:16:21,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 438 transitions, 5175 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:21,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:21,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:16:21,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:22,997 INFO L124 PetriNetUnfolderBase]: 3178/5131 cut-off events. [2024-06-04 15:16:22,997 INFO L125 PetriNetUnfolderBase]: For 972154/972164 co-relation queries the response was YES. [2024-06-04 15:16:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54378 conditions, 5131 events. 3178/5131 cut-off events. For 972154/972164 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31149 event pairs, 720 based on Foata normal form. 9/5121 useless extension candidates. Maximal degree in co-relation 54225. Up to 4201 conditions per place. [2024-06-04 15:16:23,072 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 377 selfloop transitions, 116 changer transitions 0/531 dead transitions. [2024-06-04 15:16:23,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 531 transitions, 7597 flow [2024-06-04 15:16:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-04 15:16:23,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-04 15:16:23,073 INFO L175 Difference]: Start difference. First operand has 314 places, 438 transitions, 5175 flow. Second operand 9 states and 180 transitions. [2024-06-04 15:16:23,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 531 transitions, 7597 flow [2024-06-04 15:16:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 531 transitions, 7283 flow, removed 136 selfloop flow, removed 2 redundant places. [2024-06-04 15:16:25,338 INFO L231 Difference]: Finished difference. Result has 324 places, 498 transitions, 6316 flow [2024-06-04 15:16:25,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6316, PETRI_PLACES=324, PETRI_TRANSITIONS=498} [2024-06-04 15:16:25,338 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-04 15:16:25,338 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 498 transitions, 6316 flow [2024-06-04 15:16:25,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:25,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:25,339 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] [2024-06-04 15:16:25,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:16:25,339 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)] === [2024-06-04 15:16:25,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:25,339 INFO L85 PathProgramCache]: Analyzing trace with hash -870585496, now seen corresponding path program 1 times [2024-06-04 15:16:25,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:25,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372446467] [2024-06-04 15:16:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372446467] [2024-06-04 15:16:26,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372446467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:26,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:26,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:26,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095741333] [2024-06-04 15:16:26,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:26,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:26,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:26,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:26,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:26,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:26,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 498 transitions, 6316 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) [2024-06-04 15:16:26,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:26,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:26,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:27,848 INFO L124 PetriNetUnfolderBase]: 3383/5353 cut-off events. [2024-06-04 15:16:27,848 INFO L125 PetriNetUnfolderBase]: For 996626/996630 co-relation queries the response was YES. [2024-06-04 15:16:27,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57361 conditions, 5353 events. 3383/5353 cut-off events. For 996626/996630 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31541 event pairs, 780 based on Foata normal form. 6/5358 useless extension candidates. Maximal degree in co-relation 57202. Up to 4797 conditions per place. [2024-06-04 15:16:27,928 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 469 selfloop transitions, 74 changer transitions 0/548 dead transitions. [2024-06-04 15:16:27,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 548 transitions, 7877 flow [2024-06-04 15:16:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 15:16:27,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-04 15:16:27,929 INFO L175 Difference]: Start difference. First operand has 324 places, 498 transitions, 6316 flow. Second operand 10 states and 188 transitions. [2024-06-04 15:16:27,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 548 transitions, 7877 flow [2024-06-04 15:16:30,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 548 transitions, 7730 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-04 15:16:30,406 INFO L231 Difference]: Finished difference. Result has 337 places, 517 transitions, 6776 flow [2024-06-04 15:16:30,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6169, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6776, PETRI_PLACES=337, PETRI_TRANSITIONS=517} [2024-06-04 15:16:30,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-04 15:16:30,407 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 517 transitions, 6776 flow [2024-06-04 15:16:30,407 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) [2024-06-04 15:16:30,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:30,407 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] [2024-06-04 15:16:30,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:16:30,407 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)] === [2024-06-04 15:16:30,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1493846570, now seen corresponding path program 4 times [2024-06-04 15:16:30,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:30,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036910813] [2024-06-04 15:16:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:30,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:31,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036910813] [2024-06-04 15:16:31,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036910813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:31,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:31,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:16:31,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123887840] [2024-06-04 15:16:31,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:31,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:16:31,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:16:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:16:31,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:16:31,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 517 transitions, 6776 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:31,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:31,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:16:31,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:32,696 INFO L124 PetriNetUnfolderBase]: 3261/5272 cut-off events. [2024-06-04 15:16:32,696 INFO L125 PetriNetUnfolderBase]: For 1018047/1018063 co-relation queries the response was YES. [2024-06-04 15:16:32,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57884 conditions, 5272 events. 3261/5272 cut-off events. For 1018047/1018063 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32081 event pairs, 738 based on Foata normal form. 18/5272 useless extension candidates. Maximal degree in co-relation 57718. Up to 4405 conditions per place. [2024-06-04 15:16:32,780 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 442 selfloop transitions, 79 changer transitions 0/560 dead transitions. [2024-06-04 15:16:32,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 560 transitions, 8236 flow [2024-06-04 15:16:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:16:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:16:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-04 15:16:32,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-04 15:16:32,781 INFO L175 Difference]: Start difference. First operand has 337 places, 517 transitions, 6776 flow. Second operand 9 states and 181 transitions. [2024-06-04 15:16:32,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 560 transitions, 8236 flow [2024-06-04 15:16:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 560 transitions, 8012 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-04 15:16:35,611 INFO L231 Difference]: Finished difference. Result has 345 places, 534 transitions, 7137 flow [2024-06-04 15:16:35,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6559, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7137, PETRI_PLACES=345, PETRI_TRANSITIONS=534} [2024-06-04 15:16:35,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-04 15:16:35,611 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 534 transitions, 7137 flow [2024-06-04 15:16:35,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:35,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:35,612 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] [2024-06-04 15:16:35,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:16:35,612 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)] === [2024-06-04 15:16:35,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash -866860629, now seen corresponding path program 1 times [2024-06-04 15:16:35,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:35,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886085634] [2024-06-04 15:16:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:35,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:36,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886085634] [2024-06-04 15:16:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886085634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:36,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:36,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61399979] [2024-06-04 15:16:36,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:36,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:36,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:36,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:36,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 534 transitions, 7137 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) [2024-06-04 15:16:36,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:36,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:36,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:37,892 INFO L124 PetriNetUnfolderBase]: 3478/5515 cut-off events. [2024-06-04 15:16:37,893 INFO L125 PetriNetUnfolderBase]: For 1046047/1046051 co-relation queries the response was YES. [2024-06-04 15:16:37,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59996 conditions, 5515 events. 3478/5515 cut-off events. For 1046047/1046051 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32735 event pairs, 763 based on Foata normal form. 8/5522 useless extension candidates. Maximal degree in co-relation 59827. Up to 4966 conditions per place. [2024-06-04 15:16:37,974 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 507 selfloop transitions, 60 changer transitions 0/572 dead transitions. [2024-06-04 15:16:37,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 572 transitions, 8576 flow [2024-06-04 15:16:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 15:16:37,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-04 15:16:37,975 INFO L175 Difference]: Start difference. First operand has 345 places, 534 transitions, 7137 flow. Second operand 10 states and 187 transitions. [2024-06-04 15:16:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 572 transitions, 8576 flow [2024-06-04 15:16:41,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 572 transitions, 8276 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:41,134 INFO L231 Difference]: Finished difference. Result has 352 places, 546 transitions, 7196 flow [2024-06-04 15:16:41,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7196, PETRI_PLACES=352, PETRI_TRANSITIONS=546} [2024-06-04 15:16:41,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-04 15:16:41,134 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 546 transitions, 7196 flow [2024-06-04 15:16:41,135 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) [2024-06-04 15:16:41,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:41,135 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] [2024-06-04 15:16:41,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:16:41,135 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)] === [2024-06-04 15:16:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -114377429, now seen corresponding path program 2 times [2024-06-04 15:16:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:41,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619593155] [2024-06-04 15:16:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:41,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619593155] [2024-06-04 15:16:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619593155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:41,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:41,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:41,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577255236] [2024-06-04 15:16:41,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:41,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:42,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:42,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 546 transitions, 7196 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) [2024-06-04 15:16:42,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:42,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:42,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:43,529 INFO L124 PetriNetUnfolderBase]: 3836/6085 cut-off events. [2024-06-04 15:16:43,529 INFO L125 PetriNetUnfolderBase]: For 1118103/1118107 co-relation queries the response was YES. [2024-06-04 15:16:43,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64929 conditions, 6085 events. 3836/6085 cut-off events. For 1118103/1118107 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36928 event pairs, 807 based on Foata normal form. 8/6092 useless extension candidates. Maximal degree in co-relation 64758. Up to 5141 conditions per place. [2024-06-04 15:16:43,625 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 536 selfloop transitions, 114 changer transitions 0/655 dead transitions. [2024-06-04 15:16:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 655 transitions, 10214 flow [2024-06-04 15:16:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:16:43,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:16:43,626 INFO L175 Difference]: Start difference. First operand has 352 places, 546 transitions, 7196 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:16:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 655 transitions, 10214 flow [2024-06-04 15:16:46,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 655 transitions, 10078 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:46,718 INFO L231 Difference]: Finished difference. Result has 360 places, 609 transitions, 8432 flow [2024-06-04 15:16:46,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8432, PETRI_PLACES=360, PETRI_TRANSITIONS=609} [2024-06-04 15:16:46,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-04 15:16:46,719 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 609 transitions, 8432 flow [2024-06-04 15:16:46,719 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) [2024-06-04 15:16:46,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:46,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:46,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:16:46,719 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)] === [2024-06-04 15:16:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash -106758869, now seen corresponding path program 3 times [2024-06-04 15:16:46,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:46,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12322026] [2024-06-04 15:16:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:46,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:47,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12322026] [2024-06-04 15:16:47,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12322026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:47,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:47,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481721129] [2024-06-04 15:16:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:47,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:47,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 609 transitions, 8432 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) [2024-06-04 15:16:47,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:47,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:47,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:49,233 INFO L124 PetriNetUnfolderBase]: 3856/6103 cut-off events. [2024-06-04 15:16:49,233 INFO L125 PetriNetUnfolderBase]: For 1140681/1140685 co-relation queries the response was YES. [2024-06-04 15:16:49,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66124 conditions, 6103 events. 3856/6103 cut-off events. For 1140681/1140685 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36826 event pairs, 771 based on Foata normal form. 8/6110 useless extension candidates. Maximal degree in co-relation 65949. Up to 5157 conditions per place. [2024-06-04 15:16:49,328 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 533 selfloop transitions, 120 changer transitions 0/658 dead transitions. [2024-06-04 15:16:49,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 658 transitions, 10439 flow [2024-06-04 15:16:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:16:49,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:16:49,329 INFO L175 Difference]: Start difference. First operand has 360 places, 609 transitions, 8432 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:16:49,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 658 transitions, 10439 flow [2024-06-04 15:16:52,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 658 transitions, 10317 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 15:16:52,548 INFO L231 Difference]: Finished difference. Result has 368 places, 625 transitions, 8903 flow [2024-06-04 15:16:52,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8903, PETRI_PLACES=368, PETRI_TRANSITIONS=625} [2024-06-04 15:16:52,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-04 15:16:52,548 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 625 transitions, 8903 flow [2024-06-04 15:16:52,548 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) [2024-06-04 15:16:52,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:52,549 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] [2024-06-04 15:16:52,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:16:52,549 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)] === [2024-06-04 15:16:52,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2065302319, now seen corresponding path program 4 times [2024-06-04 15:16:52,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:52,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138716733] [2024-06-04 15:16:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:52,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:53,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:53,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138716733] [2024-06-04 15:16:53,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138716733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:53,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:53,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:16:53,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760088322] [2024-06-04 15:16:53,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:53,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:16:53,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:16:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:16:53,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:53,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 625 transitions, 8903 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) [2024-06-04 15:16:53,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:53,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:53,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:16:55,123 INFO L124 PetriNetUnfolderBase]: 3844/6087 cut-off events. [2024-06-04 15:16:55,123 INFO L125 PetriNetUnfolderBase]: For 1134623/1134627 co-relation queries the response was YES. [2024-06-04 15:16:55,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66326 conditions, 6087 events. 3844/6087 cut-off events. For 1134623/1134627 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36825 event pairs, 771 based on Foata normal form. 8/6094 useless extension candidates. Maximal degree in co-relation 66147. Up to 5149 conditions per place. [2024-06-04 15:16:55,226 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 535 selfloop transitions, 118 changer transitions 0/658 dead transitions. [2024-06-04 15:16:55,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 658 transitions, 10655 flow [2024-06-04 15:16:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:16:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:16:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:16:55,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:16:55,227 INFO L175 Difference]: Start difference. First operand has 368 places, 625 transitions, 8903 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:16:55,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 658 transitions, 10655 flow [2024-06-04 15:16:58,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 658 transitions, 10403 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 15:16:58,798 INFO L231 Difference]: Finished difference. Result has 373 places, 625 transitions, 8894 flow [2024-06-04 15:16:58,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8651, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8894, PETRI_PLACES=373, PETRI_TRANSITIONS=625} [2024-06-04 15:16:58,799 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-04 15:16:58,799 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 625 transitions, 8894 flow [2024-06-04 15:16:58,799 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) [2024-06-04 15:16:58,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:16:58,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:16:58,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:16:58,800 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)] === [2024-06-04 15:16:58,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:16:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1463713142, now seen corresponding path program 2 times [2024-06-04 15:16:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:16:58,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505228651] [2024-06-04 15:16:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:16:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:16:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:16:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:16:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:16:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505228651] [2024-06-04 15:16:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505228651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:16:59,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:16:59,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:16:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143898695] [2024-06-04 15:16:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:16:59,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:16:59,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:16:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:16:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:16:59,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:16:59,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 625 transitions, 8894 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:16:59,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:16:59,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:16:59,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:01,520 INFO L124 PetriNetUnfolderBase]: 3935/6221 cut-off events. [2024-06-04 15:17:01,520 INFO L125 PetriNetUnfolderBase]: For 1196903/1196907 co-relation queries the response was YES. [2024-06-04 15:17:01,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 6221 events. 3935/6221 cut-off events. For 1196903/1196907 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37689 event pairs, 815 based on Foata normal form. 7/6227 useless extension candidates. Maximal degree in co-relation 68429. Up to 5152 conditions per place. [2024-06-04 15:17:01,627 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 544 selfloop transitions, 131 changer transitions 0/680 dead transitions. [2024-06-04 15:17:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 680 transitions, 11475 flow [2024-06-04 15:17:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-04 15:17:01,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-04 15:17:01,629 INFO L175 Difference]: Start difference. First operand has 373 places, 625 transitions, 8894 flow. Second operand 11 states and 210 transitions. [2024-06-04 15:17:01,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 680 transitions, 11475 flow [2024-06-04 15:17:05,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 680 transitions, 11313 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:05,060 INFO L231 Difference]: Finished difference. Result has 379 places, 650 transitions, 9759 flow [2024-06-04 15:17:05,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9759, PETRI_PLACES=379, PETRI_TRANSITIONS=650} [2024-06-04 15:17:05,060 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-04 15:17:05,061 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 650 transitions, 9759 flow [2024-06-04 15:17:05,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:05,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:05,061 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] [2024-06-04 15:17:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:17:05,061 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)] === [2024-06-04 15:17:05,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:05,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1474826177, now seen corresponding path program 1 times [2024-06-04 15:17:05,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:05,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120640837] [2024-06-04 15:17:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:06,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:06,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120640837] [2024-06-04 15:17:06,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120640837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:06,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:06,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:17:06,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643076643] [2024-06-04 15:17:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:06,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:17:06,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:17:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:17:06,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:06,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 650 transitions, 9759 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:06,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:06,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:06,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:07,867 INFO L124 PetriNetUnfolderBase]: 3940/6209 cut-off events. [2024-06-04 15:17:07,867 INFO L125 PetriNetUnfolderBase]: For 1211680/1211690 co-relation queries the response was YES. [2024-06-04 15:17:07,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69877 conditions, 6209 events. 3940/6209 cut-off events. For 1211680/1211690 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 37516 event pairs, 1098 based on Foata normal form. 11/6219 useless extension candidates. Maximal degree in co-relation 69695. Up to 5794 conditions per place. [2024-06-04 15:17:07,977 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 642 selfloop transitions, 30 changer transitions 0/677 dead transitions. [2024-06-04 15:17:07,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 677 transitions, 11336 flow [2024-06-04 15:17:07,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-04 15:17:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-04 15:17:07,978 INFO L175 Difference]: Start difference. First operand has 379 places, 650 transitions, 9759 flow. Second operand 11 states and 186 transitions. [2024-06-04 15:17:07,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 677 transitions, 11336 flow [2024-06-04 15:17:11,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 677 transitions, 11056 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-04 15:17:11,497 INFO L231 Difference]: Finished difference. Result has 388 places, 656 transitions, 9743 flow [2024-06-04 15:17:11,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9483, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9743, PETRI_PLACES=388, PETRI_TRANSITIONS=656} [2024-06-04 15:17:11,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-04 15:17:11,498 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 656 transitions, 9743 flow [2024-06-04 15:17:11,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:11,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:11,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:11,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 15:17:11,499 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)] === [2024-06-04 15:17:11,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash -106762434, now seen corresponding path program 3 times [2024-06-04 15:17:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:11,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190908863] [2024-06-04 15:17:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:11,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:12,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:12,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190908863] [2024-06-04 15:17:12,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190908863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:12,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:12,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:17:12,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944802944] [2024-06-04 15:17:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:12,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:17:12,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:17:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:17:12,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:12,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 656 transitions, 9743 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:12,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:12,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:12,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:14,137 INFO L124 PetriNetUnfolderBase]: 3983/6284 cut-off events. [2024-06-04 15:17:14,137 INFO L125 PetriNetUnfolderBase]: For 1263094/1263096 co-relation queries the response was YES. [2024-06-04 15:17:14,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71086 conditions, 6284 events. 3983/6284 cut-off events. For 1263094/1263096 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37982 event pairs, 768 based on Foata normal form. 5/6288 useless extension candidates. Maximal degree in co-relation 70900. Up to 5199 conditions per place. [2024-06-04 15:17:14,245 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 551 selfloop transitions, 137 changer transitions 0/693 dead transitions. [2024-06-04 15:17:14,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 693 transitions, 12033 flow [2024-06-04 15:17:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-04 15:17:14,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-04 15:17:14,246 INFO L175 Difference]: Start difference. First operand has 388 places, 656 transitions, 9743 flow. Second operand 11 states and 208 transitions. [2024-06-04 15:17:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 693 transitions, 12033 flow [2024-06-04 15:17:17,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 693 transitions, 11862 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-04 15:17:17,425 INFO L231 Difference]: Finished difference. Result has 395 places, 664 transitions, 10181 flow [2024-06-04 15:17:17,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10181, PETRI_PLACES=395, PETRI_TRANSITIONS=664} [2024-06-04 15:17:17,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-04 15:17:17,426 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 664 transitions, 10181 flow [2024-06-04 15:17:17,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:17,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:17,426 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] [2024-06-04 15:17:17,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 15:17:17,426 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)] === [2024-06-04 15:17:17,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1474825712, now seen corresponding path program 4 times [2024-06-04 15:17:17,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:17,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255995155] [2024-06-04 15:17:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:18,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255995155] [2024-06-04 15:17:18,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255995155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:18,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:18,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:17:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125781783] [2024-06-04 15:17:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:17:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:17:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:17:18,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:18,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 664 transitions, 10181 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:18,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:18,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:18,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:20,012 INFO L124 PetriNetUnfolderBase]: 3978/6280 cut-off events. [2024-06-04 15:17:20,012 INFO L125 PetriNetUnfolderBase]: For 1264469/1264471 co-relation queries the response was YES. [2024-06-04 15:17:20,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71288 conditions, 6280 events. 3978/6280 cut-off events. For 1264469/1264471 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37988 event pairs, 768 based on Foata normal form. 5/6284 useless extension candidates. Maximal degree in co-relation 71101. Up to 5197 conditions per place. [2024-06-04 15:17:20,125 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 550 selfloop transitions, 138 changer transitions 0/693 dead transitions. [2024-06-04 15:17:20,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 693 transitions, 12149 flow [2024-06-04 15:17:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-04 15:17:20,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-04 15:17:20,126 INFO L175 Difference]: Start difference. First operand has 395 places, 664 transitions, 10181 flow. Second operand 11 states and 207 transitions. [2024-06-04 15:17:20,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 693 transitions, 12149 flow [2024-06-04 15:17:23,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 693 transitions, 11643 flow, removed 151 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:23,872 INFO L231 Difference]: Finished difference. Result has 399 places, 664 transitions, 9959 flow [2024-06-04 15:17:23,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9959, PETRI_PLACES=399, PETRI_TRANSITIONS=664} [2024-06-04 15:17:23,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-04 15:17:23,873 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 664 transitions, 9959 flow [2024-06-04 15:17:23,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:23,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:23,873 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] [2024-06-04 15:17:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 15:17:23,873 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)] === [2024-06-04 15:17:23,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1474437902, now seen corresponding path program 5 times [2024-06-04 15:17:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:23,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905818597] [2024-06-04 15:17:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:24,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905818597] [2024-06-04 15:17:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905818597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:17:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566799037] [2024-06-04 15:17:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:17:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:17:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:17:24,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:24,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 664 transitions, 9959 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:24,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:24,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:24,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:26,600 INFO L124 PetriNetUnfolderBase]: 3969/6268 cut-off events. [2024-06-04 15:17:26,600 INFO L125 PetriNetUnfolderBase]: For 1261028/1261030 co-relation queries the response was YES. [2024-06-04 15:17:26,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70569 conditions, 6268 events. 3969/6268 cut-off events. For 1261028/1261030 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37888 event pairs, 776 based on Foata normal form. 5/6272 useless extension candidates. Maximal degree in co-relation 70381. Up to 5190 conditions per place. [2024-06-04 15:17:26,707 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 549 selfloop transitions, 138 changer transitions 0/692 dead transitions. [2024-06-04 15:17:26,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 692 transitions, 11697 flow [2024-06-04 15:17:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:17:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:17:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-04 15:17:26,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397463002114165 [2024-06-04 15:17:26,708 INFO L175 Difference]: Start difference. First operand has 399 places, 664 transitions, 9959 flow. Second operand 11 states and 208 transitions. [2024-06-04 15:17:26,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 692 transitions, 11697 flow [2024-06-04 15:17:30,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 692 transitions, 11312 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-04 15:17:30,385 INFO L231 Difference]: Finished difference. Result has 402 places, 664 transitions, 9857 flow [2024-06-04 15:17:30,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9574, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9857, PETRI_PLACES=402, PETRI_TRANSITIONS=664} [2024-06-04 15:17:30,385 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-04 15:17:30,385 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 664 transitions, 9857 flow [2024-06-04 15:17:30,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:30,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:30,386 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] [2024-06-04 15:17:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 15:17:30,386 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)] === [2024-06-04 15:17:30,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash 838617962, now seen corresponding path program 5 times [2024-06-04 15:17:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:30,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27823230] [2024-06-04 15:17:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:30,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:31,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:31,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27823230] [2024-06-04 15:17:31,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27823230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:31,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:31,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:17:31,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285060234] [2024-06-04 15:17:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:31,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:17:31,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:31,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:17:31,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:17:31,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:17:31,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 664 transitions, 9857 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:31,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:31,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:17:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:33,196 INFO L124 PetriNetUnfolderBase]: 3758/6038 cut-off events. [2024-06-04 15:17:33,196 INFO L125 PetriNetUnfolderBase]: For 1262779/1262797 co-relation queries the response was YES. [2024-06-04 15:17:33,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68695 conditions, 6038 events. 3758/6038 cut-off events. For 1262779/1262797 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37482 event pairs, 860 based on Foata normal form. 18/6029 useless extension candidates. Maximal degree in co-relation 68506. Up to 4956 conditions per place. [2024-06-04 15:17:33,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 518 selfloop transitions, 124 changer transitions 0/690 dead transitions. [2024-06-04 15:17:33,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 690 transitions, 11239 flow [2024-06-04 15:17:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:17:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:17:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-04 15:17:33,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-04 15:17:33,297 INFO L175 Difference]: Start difference. First operand has 402 places, 664 transitions, 9857 flow. Second operand 8 states and 163 transitions. [2024-06-04 15:17:33,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 690 transitions, 11239 flow [2024-06-04 15:17:36,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 690 transitions, 10914 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:36,951 INFO L231 Difference]: Finished difference. Result has 404 places, 664 transitions, 9801 flow [2024-06-04 15:17:36,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9534, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9801, PETRI_PLACES=404, PETRI_TRANSITIONS=664} [2024-06-04 15:17:36,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-04 15:17:36,952 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 664 transitions, 9801 flow [2024-06-04 15:17:36,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:17:36,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:36,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:17:36,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 15:17:36,952 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)] === [2024-06-04 15:17:36,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash 856422858, now seen corresponding path program 2 times [2024-06-04 15:17:36,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:36,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005824037] [2024-06-04 15:17:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:38,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:38,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005824037] [2024-06-04 15:17:38,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005824037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:38,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:38,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:38,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181390526] [2024-06-04 15:17:38,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:38,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:38,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:38,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:38,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 664 transitions, 9801 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) [2024-06-04 15:17:38,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:38,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:38,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:39,949 INFO L124 PetriNetUnfolderBase]: 3973/6241 cut-off events. [2024-06-04 15:17:39,949 INFO L125 PetriNetUnfolderBase]: For 1278370/1278372 co-relation queries the response was YES. [2024-06-04 15:17:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70478 conditions, 6241 events. 3973/6241 cut-off events. For 1278370/1278372 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37383 event pairs, 860 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 70288. Up to 5477 conditions per place. [2024-06-04 15:17:40,063 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 556 selfloop transitions, 131 changer transitions 0/692 dead transitions. [2024-06-04 15:17:40,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 692 transitions, 11428 flow [2024-06-04 15:17:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:17:40,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:17:40,064 INFO L175 Difference]: Start difference. First operand has 404 places, 664 transitions, 9801 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:17:40,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 692 transitions, 11428 flow [2024-06-04 15:17:43,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 692 transitions, 11116 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:43,854 INFO L231 Difference]: Finished difference. Result has 407 places, 668 transitions, 9941 flow [2024-06-04 15:17:43,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9489, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9941, PETRI_PLACES=407, PETRI_TRANSITIONS=668} [2024-06-04 15:17:43,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-04 15:17:43,854 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 668 transitions, 9941 flow [2024-06-04 15:17:43,855 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) [2024-06-04 15:17:43,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:43,855 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] [2024-06-04 15:17:43,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 15:17:43,855 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)] === [2024-06-04 15:17:43,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash 848004111, now seen corresponding path program 5 times [2024-06-04 15:17:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:43,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839074052] [2024-06-04 15:17:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:43,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:44,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:44,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839074052] [2024-06-04 15:17:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839074052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:44,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:44,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:44,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222150215] [2024-06-04 15:17:44,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:44,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:44,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:44,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 668 transitions, 9941 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) [2024-06-04 15:17:44,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:44,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:46,405 INFO L124 PetriNetUnfolderBase]: 3997/6291 cut-off events. [2024-06-04 15:17:46,405 INFO L125 PetriNetUnfolderBase]: For 1314163/1314165 co-relation queries the response was YES. [2024-06-04 15:17:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71192 conditions, 6291 events. 3997/6291 cut-off events. For 1314163/1314165 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 37870 event pairs, 804 based on Foata normal form. 10/6300 useless extension candidates. Maximal degree in co-relation 71001. Up to 5605 conditions per place. [2024-06-04 15:17:46,515 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 607 selfloop transitions, 86 changer transitions 0/698 dead transitions. [2024-06-04 15:17:46,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 698 transitions, 11675 flow [2024-06-04 15:17:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:17:46,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:17:46,516 INFO L175 Difference]: Start difference. First operand has 407 places, 668 transitions, 9941 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:17:46,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 698 transitions, 11675 flow [2024-06-04 15:17:50,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 698 transitions, 11273 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-04 15:17:50,184 INFO L231 Difference]: Finished difference. Result has 409 places, 675 transitions, 9980 flow [2024-06-04 15:17:50,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9539, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9980, PETRI_PLACES=409, PETRI_TRANSITIONS=675} [2024-06-04 15:17:50,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-04 15:17:50,184 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 675 transitions, 9980 flow [2024-06-04 15:17:50,185 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) [2024-06-04 15:17:50,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:50,185 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] [2024-06-04 15:17:50,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 15:17:50,185 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)] === [2024-06-04 15:17:50,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2056257549, now seen corresponding path program 6 times [2024-06-04 15:17:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475031023] [2024-06-04 15:17:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475031023] [2024-06-04 15:17:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475031023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:51,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:51,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185277307] [2024-06-04 15:17:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:51,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:51,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:51,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 675 transitions, 9980 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) [2024-06-04 15:17:51,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:51,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:51,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:52,763 INFO L124 PetriNetUnfolderBase]: 4033/6387 cut-off events. [2024-06-04 15:17:52,763 INFO L125 PetriNetUnfolderBase]: For 1323274/1323276 co-relation queries the response was YES. [2024-06-04 15:17:52,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72074 conditions, 6387 events. 4033/6387 cut-off events. For 1323274/1323276 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38955 event pairs, 815 based on Foata normal form. 6/6392 useless extension candidates. Maximal degree in co-relation 71882. Up to 5103 conditions per place. [2024-06-04 15:17:52,875 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 516 selfloop transitions, 183 changer transitions 0/704 dead transitions. [2024-06-04 15:17:52,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 704 transitions, 12189 flow [2024-06-04 15:17:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:17:52,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:17:52,876 INFO L175 Difference]: Start difference. First operand has 409 places, 675 transitions, 9980 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:17:52,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 704 transitions, 12189 flow [2024-06-04 15:17:56,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 704 transitions, 11893 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-04 15:17:56,892 INFO L231 Difference]: Finished difference. Result has 412 places, 682 transitions, 10303 flow [2024-06-04 15:17:56,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9702, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10303, PETRI_PLACES=412, PETRI_TRANSITIONS=682} [2024-06-04 15:17:56,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-04 15:17:56,893 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 682 transitions, 10303 flow [2024-06-04 15:17:56,893 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) [2024-06-04 15:17:56,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:17:56,894 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] [2024-06-04 15:17:56,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 15:17:56,894 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)] === [2024-06-04 15:17:56,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:17:56,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1552849915, now seen corresponding path program 7 times [2024-06-04 15:17:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:17:56,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512440195] [2024-06-04 15:17:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:17:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:17:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:17:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:17:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:17:57,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512440195] [2024-06-04 15:17:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512440195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:17:57,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:17:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:17:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349818072] [2024-06-04 15:17:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:17:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:17:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:17:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:17:57,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:17:57,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:17:57,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 682 transitions, 10303 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) [2024-06-04 15:17:57,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:17:57,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:17:57,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:17:59,758 INFO L124 PetriNetUnfolderBase]: 4053/6405 cut-off events. [2024-06-04 15:17:59,758 INFO L125 PetriNetUnfolderBase]: For 1324149/1324151 co-relation queries the response was YES. [2024-06-04 15:17:59,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72535 conditions, 6405 events. 4053/6405 cut-off events. For 1324149/1324151 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38955 event pairs, 746 based on Foata normal form. 6/6410 useless extension candidates. Maximal degree in co-relation 72342. Up to 5119 conditions per place. [2024-06-04 15:17:59,860 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 186 changer transitions 0/708 dead transitions. [2024-06-04 15:17:59,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 708 transitions, 12416 flow [2024-06-04 15:17:59,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:17:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:17:59,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:17:59,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:17:59,861 INFO L175 Difference]: Start difference. First operand has 412 places, 682 transitions, 10303 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:17:59,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 708 transitions, 12416 flow [2024-06-04 15:18:03,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 708 transitions, 12157 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 15:18:03,538 INFO L231 Difference]: Finished difference. Result has 416 places, 686 transitions, 10559 flow [2024-06-04 15:18:03,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10051, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10559, PETRI_PLACES=416, PETRI_TRANSITIONS=686} [2024-06-04 15:18:03,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-04 15:18:03,538 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 686 transitions, 10559 flow [2024-06-04 15:18:03,539 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) [2024-06-04 15:18:03,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:03,539 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] [2024-06-04 15:18:03,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 15:18:03,539 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)] === [2024-06-04 15:18:03,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:03,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1552583005, now seen corresponding path program 8 times [2024-06-04 15:18:03,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:03,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989920560] [2024-06-04 15:18:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:04,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989920560] [2024-06-04 15:18:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989920560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482949711] [2024-06-04 15:18:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:04,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:04,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:04,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 686 transitions, 10559 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) [2024-06-04 15:18:04,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:04,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:04,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:06,322 INFO L124 PetriNetUnfolderBase]: 4041/6389 cut-off events. [2024-06-04 15:18:06,322 INFO L125 PetriNetUnfolderBase]: For 1316919/1316921 co-relation queries the response was YES. [2024-06-04 15:18:06,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72090 conditions, 6389 events. 4041/6389 cut-off events. For 1316919/1316921 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38849 event pairs, 744 based on Foata normal form. 6/6394 useless extension candidates. Maximal degree in co-relation 71896. Up to 5111 conditions per place. [2024-06-04 15:18:06,433 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 513 selfloop transitions, 189 changer transitions 0/707 dead transitions. [2024-06-04 15:18:06,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 707 transitions, 12303 flow [2024-06-04 15:18:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:18:06,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:18:06,434 INFO L175 Difference]: Start difference. First operand has 416 places, 686 transitions, 10559 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:18:06,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 707 transitions, 12303 flow [2024-06-04 15:18:10,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 707 transitions, 11894 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-04 15:18:10,664 INFO L231 Difference]: Finished difference. Result has 418 places, 686 transitions, 10550 flow [2024-06-04 15:18:10,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10152, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10550, PETRI_PLACES=418, PETRI_TRANSITIONS=686} [2024-06-04 15:18:10,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-04 15:18:10,665 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 686 transitions, 10550 flow [2024-06-04 15:18:10,665 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) [2024-06-04 15:18:10,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:10,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 15:18:10,665 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)] === [2024-06-04 15:18:10,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1551742252, now seen corresponding path program 6 times [2024-06-04 15:18:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:10,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772358700] [2024-06-04 15:18:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:11,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:11,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772358700] [2024-06-04 15:18:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772358700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:11,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:11,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:18:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343015310] [2024-06-04 15:18:11,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:11,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:18:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:18:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:18:11,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:11,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 686 transitions, 10550 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:11,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:11,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:11,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:13,429 INFO L124 PetriNetUnfolderBase]: 4112/6482 cut-off events. [2024-06-04 15:18:13,429 INFO L125 PetriNetUnfolderBase]: For 1367488/1367490 co-relation queries the response was YES. [2024-06-04 15:18:13,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74314 conditions, 6482 events. 4112/6482 cut-off events. For 1367488/1367490 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39306 event pairs, 816 based on Foata normal form. 5/6486 useless extension candidates. Maximal degree in co-relation 74120. Up to 4956 conditions per place. [2024-06-04 15:18:13,544 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 219 changer transitions 0/722 dead transitions. [2024-06-04 15:18:13,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 722 transitions, 13136 flow [2024-06-04 15:18:13,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:18:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:18:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:18:13,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:18:13,546 INFO L175 Difference]: Start difference. First operand has 418 places, 686 transitions, 10550 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:18:13,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 722 transitions, 13136 flow [2024-06-04 15:18:17,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 722 transitions, 12807 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 15:18:17,826 INFO L231 Difference]: Finished difference. Result has 421 places, 698 transitions, 11384 flow [2024-06-04 15:18:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10225, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11384, PETRI_PLACES=421, PETRI_TRANSITIONS=698} [2024-06-04 15:18:17,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-04 15:18:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 698 transitions, 11384 flow [2024-06-04 15:18:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:17,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:17,827 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] [2024-06-04 15:18:17,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 15:18:17,827 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)] === [2024-06-04 15:18:17,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1562467012, now seen corresponding path program 7 times [2024-06-04 15:18:17,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:17,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377386508] [2024-06-04 15:18:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377386508] [2024-06-04 15:18:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377386508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:18,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:18,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:18:18,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226286020] [2024-06-04 15:18:18,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:18:18,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:18,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:18:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:18:18,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:18,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 698 transitions, 11384 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:18,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:18,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:18,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:20,634 INFO L124 PetriNetUnfolderBase]: 4127/6493 cut-off events. [2024-06-04 15:18:20,635 INFO L125 PetriNetUnfolderBase]: For 1382682/1382684 co-relation queries the response was YES. [2024-06-04 15:18:20,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75823 conditions, 6493 events. 4127/6493 cut-off events. For 1382682/1382684 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39306 event pairs, 746 based on Foata normal form. 5/6497 useless extension candidates. Maximal degree in co-relation 75628. Up to 4970 conditions per place. [2024-06-04 15:18:20,750 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 217 changer transitions 0/726 dead transitions. [2024-06-04 15:18:20,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 726 transitions, 13627 flow [2024-06-04 15:18:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:18:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:18:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 15:18:20,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-04 15:18:20,751 INFO L175 Difference]: Start difference. First operand has 421 places, 698 transitions, 11384 flow. Second operand 10 states and 189 transitions. [2024-06-04 15:18:20,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 726 transitions, 13627 flow [2024-06-04 15:18:25,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 726 transitions, 13278 flow, removed 139 selfloop flow, removed 6 redundant places. [2024-06-04 15:18:25,790 INFO L231 Difference]: Finished difference. Result has 425 places, 702 transitions, 11690 flow [2024-06-04 15:18:25,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11067, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11690, PETRI_PLACES=425, PETRI_TRANSITIONS=702} [2024-06-04 15:18:25,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-04 15:18:25,790 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 702 transitions, 11690 flow [2024-06-04 15:18:25,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:25,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:25,790 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] [2024-06-04 15:18:25,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 15:18:25,791 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)] === [2024-06-04 15:18:25,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash 743964220, now seen corresponding path program 8 times [2024-06-04 15:18:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:25,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058815266] [2024-06-04 15:18:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:26,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058815266] [2024-06-04 15:18:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058815266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:26,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:26,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:18:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267481918] [2024-06-04 15:18:26,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:18:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:18:26,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:18:26,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:26,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 702 transitions, 11690 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:26,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:26,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:26,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:28,599 INFO L124 PetriNetUnfolderBase]: 4146/6526 cut-off events. [2024-06-04 15:18:28,599 INFO L125 PetriNetUnfolderBase]: For 1368622/1368624 co-relation queries the response was YES. [2024-06-04 15:18:28,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76051 conditions, 6526 events. 4146/6526 cut-off events. For 1368622/1368624 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39543 event pairs, 738 based on Foata normal form. 5/6530 useless extension candidates. Maximal degree in co-relation 75855. Up to 4989 conditions per place. [2024-06-04 15:18:28,721 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 506 selfloop transitions, 219 changer transitions 0/730 dead transitions. [2024-06-04 15:18:28,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 730 transitions, 13921 flow [2024-06-04 15:18:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:18:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:18:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-04 15:18:28,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-04 15:18:28,722 INFO L175 Difference]: Start difference. First operand has 425 places, 702 transitions, 11690 flow. Second operand 10 states and 188 transitions. [2024-06-04 15:18:28,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 730 transitions, 13921 flow [2024-06-04 15:18:33,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 730 transitions, 13410 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-04 15:18:33,089 INFO L231 Difference]: Finished difference. Result has 427 places, 706 transitions, 11818 flow [2024-06-04 15:18:33,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11194, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11818, PETRI_PLACES=427, PETRI_TRANSITIONS=706} [2024-06-04 15:18:33,090 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-04 15:18:33,090 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 706 transitions, 11818 flow [2024-06-04 15:18:33,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:33,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:33,090 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] [2024-06-04 15:18:33,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 15:18:33,090 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)] === [2024-06-04 15:18:33,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:33,091 INFO L85 PathProgramCache]: Analyzing trace with hash 743977240, now seen corresponding path program 9 times [2024-06-04 15:18:33,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:33,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68743891] [2024-06-04 15:18:33,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:33,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:34,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:34,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68743891] [2024-06-04 15:18:34,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68743891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:34,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:18:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666959756] [2024-06-04 15:18:34,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:34,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:18:34,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:18:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:18:34,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:34,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 706 transitions, 11818 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:34,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:34,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:34,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:36,045 INFO L124 PetriNetUnfolderBase]: 4141/6522 cut-off events. [2024-06-04 15:18:36,045 INFO L125 PetriNetUnfolderBase]: For 1345989/1345991 co-relation queries the response was YES. [2024-06-04 15:18:36,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75517 conditions, 6522 events. 4141/6522 cut-off events. For 1345989/1345991 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39523 event pairs, 738 based on Foata normal form. 5/6526 useless extension candidates. Maximal degree in co-relation 75321. Up to 4987 conditions per place. [2024-06-04 15:18:36,167 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 504 selfloop transitions, 221 changer transitions 0/730 dead transitions. [2024-06-04 15:18:36,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 730 transitions, 13864 flow [2024-06-04 15:18:36,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:18:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:18:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 15:18:36,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-04 15:18:36,168 INFO L175 Difference]: Start difference. First operand has 427 places, 706 transitions, 11818 flow. Second operand 10 states and 187 transitions. [2024-06-04 15:18:36,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 730 transitions, 13864 flow [2024-06-04 15:18:40,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 730 transitions, 13206 flow, removed 149 selfloop flow, removed 8 redundant places. [2024-06-04 15:18:40,616 INFO L231 Difference]: Finished difference. Result has 429 places, 706 transitions, 11620 flow [2024-06-04 15:18:40,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11164, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11620, PETRI_PLACES=429, PETRI_TRANSITIONS=706} [2024-06-04 15:18:40,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-04 15:18:40,617 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 706 transitions, 11620 flow [2024-06-04 15:18:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:40,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 15:18:40,617 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)] === [2024-06-04 15:18:40,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2063886029, now seen corresponding path program 2 times [2024-06-04 15:18:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713109364] [2024-06-04 15:18:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:41,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713109364] [2024-06-04 15:18:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713109364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:41,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:41,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:18:41,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527678532] [2024-06-04 15:18:41,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:41,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:18:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:41,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:18:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:18:41,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:41,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 706 transitions, 11620 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:41,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:41,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:41,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:43,704 INFO L124 PetriNetUnfolderBase]: 4146/6520 cut-off events. [2024-06-04 15:18:43,704 INFO L125 PetriNetUnfolderBase]: For 1327773/1327783 co-relation queries the response was YES. [2024-06-04 15:18:43,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75309 conditions, 6520 events. 4146/6520 cut-off events. For 1327773/1327783 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 39495 event pairs, 1130 based on Foata normal form. 11/6530 useless extension candidates. Maximal degree in co-relation 75113. Up to 6070 conditions per place. [2024-06-04 15:18:43,821 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 678 selfloop transitions, 43 changer transitions 0/726 dead transitions. [2024-06-04 15:18:43,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 726 transitions, 13252 flow [2024-06-04 15:18:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:18:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:18:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-04 15:18:43,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-04 15:18:43,823 INFO L175 Difference]: Start difference. First operand has 429 places, 706 transitions, 11620 flow. Second operand 10 states and 168 transitions. [2024-06-04 15:18:43,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 726 transitions, 13252 flow [2024-06-04 15:18:47,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 726 transitions, 12682 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-04 15:18:47,860 INFO L231 Difference]: Finished difference. Result has 429 places, 709 transitions, 11296 flow [2024-06-04 15:18:47,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11050, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11296, PETRI_PLACES=429, PETRI_TRANSITIONS=709} [2024-06-04 15:18:47,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-04 15:18:47,861 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 709 transitions, 11296 flow [2024-06-04 15:18:47,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:18:47,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:47,861 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] [2024-06-04 15:18:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 15:18:47,861 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)] === [2024-06-04 15:18:47,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1115903078, now seen corresponding path program 7 times [2024-06-04 15:18:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794496775] [2024-06-04 15:18:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:48,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:48,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794496775] [2024-06-04 15:18:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794496775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:48,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:48,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019167435] [2024-06-04 15:18:48,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:48,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:49,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:49,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 709 transitions, 11296 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) [2024-06-04 15:18:49,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:49,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:50,826 INFO L124 PetriNetUnfolderBase]: 4190/6663 cut-off events. [2024-06-04 15:18:50,826 INFO L125 PetriNetUnfolderBase]: For 1421427/1421429 co-relation queries the response was YES. [2024-06-04 15:18:50,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75051 conditions, 6663 events. 4190/6663 cut-off events. For 1421427/1421429 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41340 event pairs, 806 based on Foata normal form. 14/6674 useless extension candidates. Maximal degree in co-relation 74856. Up to 5349 conditions per place. [2024-06-04 15:18:50,949 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 555 selfloop transitions, 171 changer transitions 0/731 dead transitions. [2024-06-04 15:18:50,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 731 transitions, 13060 flow [2024-06-04 15:18:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:50,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:18:50,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:18:50,950 INFO L175 Difference]: Start difference. First operand has 429 places, 709 transitions, 11296 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:18:50,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 731 transitions, 13060 flow [2024-06-04 15:18:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 731 transitions, 12850 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-04 15:18:54,801 INFO L231 Difference]: Finished difference. Result has 430 places, 711 transitions, 11556 flow [2024-06-04 15:18:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11086, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11556, PETRI_PLACES=430, PETRI_TRANSITIONS=711} [2024-06-04 15:18:54,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-04 15:18:54,802 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 711 transitions, 11556 flow [2024-06-04 15:18:54,802 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) [2024-06-04 15:18:54,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:54,802 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] [2024-06-04 15:18:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 15:18:54,802 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)] === [2024-06-04 15:18:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1651354536, now seen corresponding path program 8 times [2024-06-04 15:18:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:54,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178037669] [2024-06-04 15:18:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:55,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178037669] [2024-06-04 15:18:55,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178037669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:18:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221305353] [2024-06-04 15:18:55,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:55,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:18:55,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:18:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:18:55,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:18:55,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 711 transitions, 11556 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) [2024-06-04 15:18:55,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:55,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:18:55,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:57,616 INFO L124 PetriNetUnfolderBase]: 4234/6737 cut-off events. [2024-06-04 15:18:57,616 INFO L125 PetriNetUnfolderBase]: For 1450906/1450908 co-relation queries the response was YES. [2024-06-04 15:18:57,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76715 conditions, 6737 events. 4234/6737 cut-off events. For 1450906/1450908 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41899 event pairs, 818 based on Foata normal form. 14/6748 useless extension candidates. Maximal degree in co-relation 76519. Up to 5417 conditions per place. [2024-06-04 15:18:57,741 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 179 changer transitions 0/733 dead transitions. [2024-06-04 15:18:57,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 733 transitions, 13328 flow [2024-06-04 15:18:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:18:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:18:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:18:57,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:18:57,742 INFO L175 Difference]: Start difference. First operand has 430 places, 711 transitions, 11556 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:18:57,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 733 transitions, 13328 flow [2024-06-04 15:19:01,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 733 transitions, 12902 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 15:19:01,740 INFO L231 Difference]: Finished difference. Result has 432 places, 713 transitions, 11620 flow [2024-06-04 15:19:01,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11130, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11620, PETRI_PLACES=432, PETRI_TRANSITIONS=713} [2024-06-04 15:19:01,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-04 15:19:01,741 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 713 transitions, 11620 flow [2024-06-04 15:19:01,741 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) [2024-06-04 15:19:01,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:01,741 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] [2024-06-04 15:19:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 15:19:01,741 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)] === [2024-06-04 15:19:01,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1651680966, now seen corresponding path program 9 times [2024-06-04 15:19:01,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:01,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773814095] [2024-06-04 15:19:01,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:01,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:02,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:02,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773814095] [2024-06-04 15:19:02,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773814095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:02,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:02,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:02,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559741420] [2024-06-04 15:19:02,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:02,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:02,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:02,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:02,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 713 transitions, 11620 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) [2024-06-04 15:19:02,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:02,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:04,557 INFO L124 PetriNetUnfolderBase]: 4337/6884 cut-off events. [2024-06-04 15:19:04,557 INFO L125 PetriNetUnfolderBase]: For 1547328/1547330 co-relation queries the response was YES. [2024-06-04 15:19:04,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79791 conditions, 6884 events. 4337/6884 cut-off events. For 1547328/1547330 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42799 event pairs, 825 based on Foata normal form. 14/6895 useless extension candidates. Maximal degree in co-relation 79594. Up to 5340 conditions per place. [2024-06-04 15:19:04,677 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 551 selfloop transitions, 186 changer transitions 0/742 dead transitions. [2024-06-04 15:19:04,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 742 transitions, 13880 flow [2024-06-04 15:19:04,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 15:19:04,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-04 15:19:04,678 INFO L175 Difference]: Start difference. First operand has 432 places, 713 transitions, 11620 flow. Second operand 9 states and 173 transitions. [2024-06-04 15:19:04,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 742 transitions, 13880 flow [2024-06-04 15:19:08,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 742 transitions, 13434 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-04 15:19:08,956 INFO L231 Difference]: Finished difference. Result has 434 places, 717 transitions, 11807 flow [2024-06-04 15:19:08,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11174, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11807, PETRI_PLACES=434, PETRI_TRANSITIONS=717} [2024-06-04 15:19:08,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-04 15:19:08,957 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 717 transitions, 11807 flow [2024-06-04 15:19:08,957 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) [2024-06-04 15:19:08,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:08,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:08,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 15:19:08,957 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)] === [2024-06-04 15:19:08,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1280456586, now seen corresponding path program 10 times [2024-06-04 15:19:08,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:08,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273348005] [2024-06-04 15:19:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:08,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:09,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273348005] [2024-06-04 15:19:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273348005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:09,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:09,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949271740] [2024-06-04 15:19:09,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:09,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:09,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:09,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:09,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 717 transitions, 11807 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) [2024-06-04 15:19:09,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:09,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:09,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:11,794 INFO L124 PetriNetUnfolderBase]: 4309/6886 cut-off events. [2024-06-04 15:19:11,794 INFO L125 PetriNetUnfolderBase]: For 1489307/1489309 co-relation queries the response was YES. [2024-06-04 15:19:11,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77981 conditions, 6886 events. 4309/6886 cut-off events. For 1489307/1489309 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43332 event pairs, 808 based on Foata normal form. 14/6897 useless extension candidates. Maximal degree in co-relation 77783. Up to 5534 conditions per place. [2024-06-04 15:19:11,919 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 548 selfloop transitions, 184 changer transitions 0/737 dead transitions. [2024-06-04 15:19:11,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 737 transitions, 13465 flow [2024-06-04 15:19:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:19:11,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:19:11,920 INFO L175 Difference]: Start difference. First operand has 434 places, 717 transitions, 11807 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:19:11,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 737 transitions, 13465 flow [2024-06-04 15:19:16,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 737 transitions, 13063 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-04 15:19:16,241 INFO L231 Difference]: Finished difference. Result has 438 places, 717 transitions, 11779 flow [2024-06-04 15:19:16,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11405, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11779, PETRI_PLACES=438, PETRI_TRANSITIONS=717} [2024-06-04 15:19:16,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-04 15:19:16,242 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 717 transitions, 11779 flow [2024-06-04 15:19:16,243 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) [2024-06-04 15:19:16,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:16,243 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] [2024-06-04 15:19:16,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 15:19:16,243 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)] === [2024-06-04 15:19:16,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1135146090, now seen corresponding path program 6 times [2024-06-04 15:19:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:16,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673940690] [2024-06-04 15:19:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:17,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:17,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673940690] [2024-06-04 15:19:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673940690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:17,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:17,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:19:17,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696945671] [2024-06-04 15:19:17,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:17,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:19:17,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:17,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:19:17,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:19:17,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:19:17,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 717 transitions, 11779 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:17,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:17,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:19:17,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:19,125 INFO L124 PetriNetUnfolderBase]: 4055/6518 cut-off events. [2024-06-04 15:19:19,125 INFO L125 PetriNetUnfolderBase]: For 1408557/1408579 co-relation queries the response was YES. [2024-06-04 15:19:19,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75989 conditions, 6518 events. 4055/6518 cut-off events. For 1408557/1408579 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41034 event pairs, 913 based on Foata normal form. 21/6493 useless extension candidates. Maximal degree in co-relation 75789. Up to 5311 conditions per place. [2024-06-04 15:19:19,247 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 549 selfloop transitions, 140 changer transitions 0/742 dead transitions. [2024-06-04 15:19:19,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 742 transitions, 13388 flow [2024-06-04 15:19:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-04 15:19:19,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-04 15:19:19,248 INFO L175 Difference]: Start difference. First operand has 438 places, 717 transitions, 11779 flow. Second operand 7 states and 147 transitions. [2024-06-04 15:19:19,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 742 transitions, 13388 flow [2024-06-04 15:19:24,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 742 transitions, 12998 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 15:19:24,068 INFO L231 Difference]: Finished difference. Result has 437 places, 720 transitions, 11865 flow [2024-06-04 15:19:24,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11389, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11865, PETRI_PLACES=437, PETRI_TRANSITIONS=720} [2024-06-04 15:19:24,068 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-04 15:19:24,068 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 720 transitions, 11865 flow [2024-06-04 15:19:24,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:24,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:24,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:24,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 15:19:24,069 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)] === [2024-06-04 15:19:24,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1320468618, now seen corresponding path program 3 times [2024-06-04 15:19:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814401115] [2024-06-04 15:19:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:24,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:25,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814401115] [2024-06-04 15:19:25,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814401115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:25,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:25,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:25,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238238276] [2024-06-04 15:19:25,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:25,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:25,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:25,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:25,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 720 transitions, 11865 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) [2024-06-04 15:19:25,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:25,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:25,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:27,123 INFO L124 PetriNetUnfolderBase]: 4319/6763 cut-off events. [2024-06-04 15:19:27,123 INFO L125 PetriNetUnfolderBase]: For 1429231/1429231 co-relation queries the response was YES. [2024-06-04 15:19:27,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78646 conditions, 6763 events. 4319/6763 cut-off events. For 1429231/1429231 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40875 event pairs, 935 based on Foata normal form. 1/6758 useless extension candidates. Maximal degree in co-relation 78445. Up to 6027 conditions per place. [2024-06-04 15:19:27,244 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 621 selfloop transitions, 119 changer transitions 0/745 dead transitions. [2024-06-04 15:19:27,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 745 transitions, 13577 flow [2024-06-04 15:19:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:19:27,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-04 15:19:27,245 INFO L175 Difference]: Start difference. First operand has 437 places, 720 transitions, 11865 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:19:27,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 745 transitions, 13577 flow [2024-06-04 15:19:31,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 745 transitions, 13238 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-04 15:19:31,878 INFO L231 Difference]: Finished difference. Result has 440 places, 723 transitions, 11926 flow [2024-06-04 15:19:31,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11526, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11926, PETRI_PLACES=440, PETRI_TRANSITIONS=723} [2024-06-04 15:19:31,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-04 15:19:31,880 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 723 transitions, 11926 flow [2024-06-04 15:19:31,880 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) [2024-06-04 15:19:31,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:31,880 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] [2024-06-04 15:19:31,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 15:19:31,880 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)] === [2024-06-04 15:19:31,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1890207754, now seen corresponding path program 7 times [2024-06-04 15:19:31,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:31,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46526750] [2024-06-04 15:19:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:31,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:32,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:32,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46526750] [2024-06-04 15:19:32,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46526750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:32,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:32,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:19:32,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752002560] [2024-06-04 15:19:32,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:32,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:19:32,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:19:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:19:33,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:19:33,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 723 transitions, 11926 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:33,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:33,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:19:33,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:34,905 INFO L124 PetriNetUnfolderBase]: 4070/6549 cut-off events. [2024-06-04 15:19:34,905 INFO L125 PetriNetUnfolderBase]: For 1460333/1460381 co-relation queries the response was YES. [2024-06-04 15:19:35,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76773 conditions, 6549 events. 4070/6549 cut-off events. For 1460333/1460381 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 41371 event pairs, 831 based on Foata normal form. 35/6483 useless extension candidates. Maximal degree in co-relation 76572. Up to 5141 conditions per place. [2024-06-04 15:19:35,293 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 197 changer transitions 0/742 dead transitions. [2024-06-04 15:19:35,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 742 transitions, 13518 flow [2024-06-04 15:19:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-04 15:19:35,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-04 15:19:35,294 INFO L175 Difference]: Start difference. First operand has 440 places, 723 transitions, 11926 flow. Second operand 7 states and 142 transitions. [2024-06-04 15:19:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 742 transitions, 13518 flow [2024-06-04 15:19:39,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 742 transitions, 13140 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-04 15:19:39,159 INFO L231 Difference]: Finished difference. Result has 440 places, 726 transitions, 12134 flow [2024-06-04 15:19:39,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11548, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12134, PETRI_PLACES=440, PETRI_TRANSITIONS=726} [2024-06-04 15:19:39,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-04 15:19:39,159 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 726 transitions, 12134 flow [2024-06-04 15:19:39,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:39,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:39,159 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] [2024-06-04 15:19:39,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:19:39,160 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)] === [2024-06-04 15:19:39,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:39,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1674731658, now seen corresponding path program 4 times [2024-06-04 15:19:39,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:39,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534281308] [2024-06-04 15:19:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:39,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:40,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534281308] [2024-06-04 15:19:40,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534281308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:40,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:40,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:40,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929701466] [2024-06-04 15:19:40,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:40,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:40,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:40,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 726 transitions, 12134 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) [2024-06-04 15:19:40,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:40,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:42,271 INFO L124 PetriNetUnfolderBase]: 4337/6790 cut-off events. [2024-06-04 15:19:42,271 INFO L125 PetriNetUnfolderBase]: For 1471926/1471926 co-relation queries the response was YES. [2024-06-04 15:19:42,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80259 conditions, 6790 events. 4337/6790 cut-off events. For 1471926/1471926 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41005 event pairs, 935 based on Foata normal form. 1/6785 useless extension candidates. Maximal degree in co-relation 80057. Up to 5974 conditions per place. [2024-06-04 15:19:42,394 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 593 selfloop transitions, 158 changer transitions 0/756 dead transitions. [2024-06-04 15:19:42,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 756 transitions, 14683 flow [2024-06-04 15:19:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:19:42,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:19:42,395 INFO L175 Difference]: Start difference. First operand has 440 places, 726 transitions, 12134 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:19:42,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 756 transitions, 14683 flow [2024-06-04 15:19:47,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 756 transitions, 14194 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-04 15:19:47,687 INFO L231 Difference]: Finished difference. Result has 443 places, 735 transitions, 12455 flow [2024-06-04 15:19:47,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11653, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12455, PETRI_PLACES=443, PETRI_TRANSITIONS=735} [2024-06-04 15:19:47,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-04 15:19:47,688 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 735 transitions, 12455 flow [2024-06-04 15:19:47,688 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) [2024-06-04 15:19:47,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:47,689 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] [2024-06-04 15:19:47,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:19:47,689 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)] === [2024-06-04 15:19:47,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1904007880, now seen corresponding path program 8 times [2024-06-04 15:19:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:47,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386780592] [2024-06-04 15:19:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:48,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:48,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386780592] [2024-06-04 15:19:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386780592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:48,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:48,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:19:48,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687302847] [2024-06-04 15:19:48,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:48,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:19:48,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:19:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:19:48,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-04 15:19:48,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 735 transitions, 12455 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:48,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:48,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-04 15:19:48,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:50,643 INFO L124 PetriNetUnfolderBase]: 4069/6565 cut-off events. [2024-06-04 15:19:50,644 INFO L125 PetriNetUnfolderBase]: For 1467138/1467186 co-relation queries the response was YES. [2024-06-04 15:19:50,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77536 conditions, 6565 events. 4069/6565 cut-off events. For 1467138/1467186 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41770 event pairs, 864 based on Foata normal form. 35/6488 useless extension candidates. Maximal degree in co-relation 77334. Up to 5069 conditions per place. [2024-06-04 15:19:50,764 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 481 selfloop transitions, 212 changer transitions 0/750 dead transitions. [2024-06-04 15:19:50,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 750 transitions, 14063 flow [2024-06-04 15:19:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 15:19:50,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-04 15:19:50,765 INFO L175 Difference]: Start difference. First operand has 443 places, 735 transitions, 12455 flow. Second operand 7 states and 139 transitions. [2024-06-04 15:19:50,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 750 transitions, 14063 flow [2024-06-04 15:19:55,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 750 transitions, 13622 flow, removed 123 selfloop flow, removed 5 redundant places. [2024-06-04 15:19:55,959 INFO L231 Difference]: Finished difference. Result has 445 places, 738 transitions, 12614 flow [2024-06-04 15:19:55,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12014, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12614, PETRI_PLACES=445, PETRI_TRANSITIONS=738} [2024-06-04 15:19:55,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-04 15:19:55,959 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 738 transitions, 12614 flow [2024-06-04 15:19:55,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:55,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:55,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:19:55,960 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)] === [2024-06-04 15:19:55,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1779974070, now seen corresponding path program 5 times [2024-06-04 15:19:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144549806] [2024-06-04 15:19:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144549806] [2024-06-04 15:19:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144549806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:57,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:19:57,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347489887] [2024-06-04 15:19:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:19:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:19:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:19:57,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:19:57,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 738 transitions, 12614 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) [2024-06-04 15:19:57,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:57,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:19:57,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:59,409 INFO L124 PetriNetUnfolderBase]: 4331/6784 cut-off events. [2024-06-04 15:19:59,410 INFO L125 PetriNetUnfolderBase]: For 1463105/1463105 co-relation queries the response was YES. [2024-06-04 15:19:59,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80434 conditions, 6784 events. 4331/6784 cut-off events. For 1463105/1463105 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41033 event pairs, 933 based on Foata normal form. 1/6779 useless extension candidates. Maximal degree in co-relation 80231. Up to 5967 conditions per place. [2024-06-04 15:19:59,529 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 588 selfloop transitions, 165 changer transitions 0/758 dead transitions. [2024-06-04 15:19:59,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 758 transitions, 14441 flow [2024-06-04 15:19:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:19:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:19:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:19:59,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:19:59,530 INFO L175 Difference]: Start difference. First operand has 445 places, 738 transitions, 12614 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:19:59,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 758 transitions, 14441 flow [2024-06-04 15:20:03,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 758 transitions, 13793 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-04 15:20:03,930 INFO L231 Difference]: Finished difference. Result has 449 places, 738 transitions, 12302 flow [2024-06-04 15:20:03,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11966, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12302, PETRI_PLACES=449, PETRI_TRANSITIONS=738} [2024-06-04 15:20:03,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-04 15:20:03,931 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 738 transitions, 12302 flow [2024-06-04 15:20:03,931 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) [2024-06-04 15:20:03,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:03,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:20:03,932 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)] === [2024-06-04 15:20:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -733271606, now seen corresponding path program 6 times [2024-06-04 15:20:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513487136] [2024-06-04 15:20:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:05,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:05,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513487136] [2024-06-04 15:20:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513487136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:05,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963364111] [2024-06-04 15:20:05,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:05,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:05,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 738 transitions, 12302 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) [2024-06-04 15:20:05,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:05,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:05,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:07,243 INFO L124 PetriNetUnfolderBase]: 4328/6778 cut-off events. [2024-06-04 15:20:07,243 INFO L125 PetriNetUnfolderBase]: For 1471197/1471197 co-relation queries the response was YES. [2024-06-04 15:20:07,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80089 conditions, 6778 events. 4328/6778 cut-off events. For 1471197/1471197 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 40967 event pairs, 944 based on Foata normal form. 1/6773 useless extension candidates. Maximal degree in co-relation 79885. Up to 6035 conditions per place. [2024-06-04 15:20:07,372 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 638 selfloop transitions, 118 changer transitions 0/761 dead transitions. [2024-06-04 15:20:07,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 761 transitions, 13913 flow [2024-06-04 15:20:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 15:20:07,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-04 15:20:07,373 INFO L175 Difference]: Start difference. First operand has 449 places, 738 transitions, 12302 flow. Second operand 9 states and 165 transitions. [2024-06-04 15:20:07,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 761 transitions, 13913 flow [2024-06-04 15:20:12,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 761 transitions, 13518 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-04 15:20:12,301 INFO L231 Difference]: Finished difference. Result has 451 places, 738 transitions, 12150 flow [2024-06-04 15:20:12,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12150, PETRI_PLACES=451, PETRI_TRANSITIONS=738} [2024-06-04 15:20:12,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-04 15:20:12,302 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 738 transitions, 12150 flow [2024-06-04 15:20:12,302 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) [2024-06-04 15:20:12,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:12,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:12,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:20:12,303 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)] === [2024-06-04 15:20:12,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:12,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1291774959, now seen corresponding path program 9 times [2024-06-04 15:20:12,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122735545] [2024-06-04 15:20:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:12,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:13,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:13,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122735545] [2024-06-04 15:20:13,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122735545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:13,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:13,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:13,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744069940] [2024-06-04 15:20:13,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:13,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:13,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:13,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 738 transitions, 12150 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) [2024-06-04 15:20:13,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:13,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:13,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:15,218 INFO L124 PetriNetUnfolderBase]: 4300/6739 cut-off events. [2024-06-04 15:20:15,218 INFO L125 PetriNetUnfolderBase]: For 1480531/1480531 co-relation queries the response was YES. [2024-06-04 15:20:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79155 conditions, 6739 events. 4300/6739 cut-off events. For 1480531/1480531 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40780 event pairs, 905 based on Foata normal form. 4/6737 useless extension candidates. Maximal degree in co-relation 78950. Up to 6146 conditions per place. [2024-06-04 15:20:15,349 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 685 selfloop transitions, 69 changer transitions 0/759 dead transitions. [2024-06-04 15:20:15,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 759 transitions, 13772 flow [2024-06-04 15:20:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 15:20:15,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-04 15:20:15,350 INFO L175 Difference]: Start difference. First operand has 451 places, 738 transitions, 12150 flow. Second operand 9 states and 162 transitions. [2024-06-04 15:20:15,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 759 transitions, 13772 flow [2024-06-04 15:20:20,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 759 transitions, 13370 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-04 15:20:20,547 INFO L231 Difference]: Finished difference. Result has 451 places, 738 transitions, 11896 flow [2024-06-04 15:20:20,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11748, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11896, PETRI_PLACES=451, PETRI_TRANSITIONS=738} [2024-06-04 15:20:20,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-04 15:20:20,547 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 738 transitions, 11896 flow [2024-06-04 15:20:20,547 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) [2024-06-04 15:20:20,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:20,547 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] [2024-06-04 15:20:20,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:20:20,547 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)] === [2024-06-04 15:20:20,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1662672909, now seen corresponding path program 10 times [2024-06-04 15:20:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:20,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601610446] [2024-06-04 15:20:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:21,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601610446] [2024-06-04 15:20:21,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601610446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:21,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279580225] [2024-06-04 15:20:21,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:21,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:21,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:21,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:21,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 738 transitions, 11896 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) [2024-06-04 15:20:21,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:21,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:21,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:23,369 INFO L124 PetriNetUnfolderBase]: 4342/6826 cut-off events. [2024-06-04 15:20:23,370 INFO L125 PetriNetUnfolderBase]: For 1519494/1519494 co-relation queries the response was YES. [2024-06-04 15:20:23,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80197 conditions, 6826 events. 4342/6826 cut-off events. For 1519494/1519494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 41655 event pairs, 869 based on Foata normal form. 2/6822 useless extension candidates. Maximal degree in co-relation 79991. Up to 5992 conditions per place. [2024-06-04 15:20:23,504 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 644 selfloop transitions, 119 changer transitions 0/768 dead transitions. [2024-06-04 15:20:23,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 768 transitions, 14072 flow [2024-06-04 15:20:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:20:23,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:20:23,505 INFO L175 Difference]: Start difference. First operand has 451 places, 738 transitions, 11896 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:20:23,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 768 transitions, 14072 flow [2024-06-04 15:20:29,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 768 transitions, 13271 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-04 15:20:29,182 INFO L231 Difference]: Finished difference. Result has 451 places, 748 transitions, 11717 flow [2024-06-04 15:20:29,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11095, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11717, PETRI_PLACES=451, PETRI_TRANSITIONS=748} [2024-06-04 15:20:29,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-04 15:20:29,183 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 748 transitions, 11717 flow [2024-06-04 15:20:29,183 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) [2024-06-04 15:20:29,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:29,183 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] [2024-06-04 15:20:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:20:29,184 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)] === [2024-06-04 15:20:29,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:29,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1675559919, now seen corresponding path program 11 times [2024-06-04 15:20:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969052040] [2024-06-04 15:20:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969052040] [2024-06-04 15:20:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969052040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:30,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:30,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632010042] [2024-06-04 15:20:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:30,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:30,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:30,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:30,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 748 transitions, 11717 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) [2024-06-04 15:20:30,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:30,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:30,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:31,991 INFO L124 PetriNetUnfolderBase]: 4336/6832 cut-off events. [2024-06-04 15:20:31,991 INFO L125 PetriNetUnfolderBase]: For 1516984/1516984 co-relation queries the response was YES. [2024-06-04 15:20:32,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79927 conditions, 6832 events. 4336/6832 cut-off events. For 1516984/1516984 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41817 event pairs, 854 based on Foata normal form. 2/6828 useless extension candidates. Maximal degree in co-relation 79718. Up to 5987 conditions per place. [2024-06-04 15:20:32,116 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 639 selfloop transitions, 124 changer transitions 0/768 dead transitions. [2024-06-04 15:20:32,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 768 transitions, 13611 flow [2024-06-04 15:20:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 15:20:32,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-04 15:20:32,117 INFO L175 Difference]: Start difference. First operand has 451 places, 748 transitions, 11717 flow. Second operand 9 states and 167 transitions. [2024-06-04 15:20:32,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 768 transitions, 13611 flow [2024-06-04 15:20:38,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 768 transitions, 13371 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 15:20:38,383 INFO L231 Difference]: Finished difference. Result has 455 places, 748 transitions, 11733 flow [2024-06-04 15:20:38,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11479, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11733, PETRI_PLACES=455, PETRI_TRANSITIONS=748} [2024-06-04 15:20:38,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-04 15:20:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 748 transitions, 11733 flow [2024-06-04 15:20:38,384 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) [2024-06-04 15:20:38,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:38,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 15:20:38,384 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)] === [2024-06-04 15:20:38,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:38,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1676005389, now seen corresponding path program 12 times [2024-06-04 15:20:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75782067] [2024-06-04 15:20:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:38,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75782067] [2024-06-04 15:20:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75782067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:39,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090129742] [2024-06-04 15:20:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:39,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:39,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:39,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 748 transitions, 11733 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) [2024-06-04 15:20:39,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:39,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:39,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:41,357 INFO L124 PetriNetUnfolderBase]: 4330/6824 cut-off events. [2024-06-04 15:20:41,357 INFO L125 PetriNetUnfolderBase]: For 1500528/1500528 co-relation queries the response was YES. [2024-06-04 15:20:41,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79530 conditions, 6824 events. 4330/6824 cut-off events. For 1500528/1500528 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41751 event pairs, 839 based on Foata normal form. 2/6820 useless extension candidates. Maximal degree in co-relation 79320. Up to 5982 conditions per place. [2024-06-04 15:20:41,491 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 632 selfloop transitions, 130 changer transitions 0/767 dead transitions. [2024-06-04 15:20:41,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 767 transitions, 13365 flow [2024-06-04 15:20:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 15:20:41,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-04 15:20:41,492 INFO L175 Difference]: Start difference. First operand has 455 places, 748 transitions, 11733 flow. Second operand 9 states and 166 transitions. [2024-06-04 15:20:41,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 767 transitions, 13365 flow [2024-06-04 15:20:48,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 767 transitions, 13040 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-04 15:20:48,382 INFO L231 Difference]: Finished difference. Result has 457 places, 748 transitions, 11674 flow [2024-06-04 15:20:48,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11408, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11674, PETRI_PLACES=457, PETRI_TRANSITIONS=748} [2024-06-04 15:20:48,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-04 15:20:48,382 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 748 transitions, 11674 flow [2024-06-04 15:20:48,383 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) [2024-06-04 15:20:48,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:48,383 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] [2024-06-04 15:20:48,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 15:20:48,383 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)] === [2024-06-04 15:20:48,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1115779729, now seen corresponding path program 13 times [2024-06-04 15:20:48,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:48,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658461454] [2024-06-04 15:20:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:48,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:49,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658461454] [2024-06-04 15:20:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658461454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:49,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:49,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142370384] [2024-06-04 15:20:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:49,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:49,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:49,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:49,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 748 transitions, 11674 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) [2024-06-04 15:20:49,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:49,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:49,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:51,257 INFO L124 PetriNetUnfolderBase]: 4382/6935 cut-off events. [2024-06-04 15:20:51,257 INFO L125 PetriNetUnfolderBase]: For 1574339/1574341 co-relation queries the response was YES. [2024-06-04 15:20:51,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80933 conditions, 6935 events. 4382/6935 cut-off events. For 1574339/1574341 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 42800 event pairs, 839 based on Foata normal form. 6/6935 useless extension candidates. Maximal degree in co-relation 80723. Up to 5096 conditions per place. [2024-06-04 15:20:51,387 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 519 selfloop transitions, 251 changer transitions 0/775 dead transitions. [2024-06-04 15:20:51,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 775 transitions, 14332 flow [2024-06-04 15:20:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:20:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:20:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 15:20:51,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-04 15:20:51,388 INFO L175 Difference]: Start difference. First operand has 457 places, 748 transitions, 11674 flow. Second operand 9 states and 174 transitions. [2024-06-04 15:20:51,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 775 transitions, 14332 flow [2024-06-04 15:20:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 775 transitions, 14103 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:20:57,949 INFO L231 Difference]: Finished difference. Result has 459 places, 756 transitions, 12190 flow [2024-06-04 15:20:57,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11445, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12190, PETRI_PLACES=459, PETRI_TRANSITIONS=756} [2024-06-04 15:20:57,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-04 15:20:57,949 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 756 transitions, 12190 flow [2024-06-04 15:20:57,950 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) [2024-06-04 15:20:57,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:57,950 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] [2024-06-04 15:20:57,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 15:20:57,950 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)] === [2024-06-04 15:20:57,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:57,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1115512819, now seen corresponding path program 14 times [2024-06-04 15:20:57,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:57,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117495448] [2024-06-04 15:20:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:57,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:58,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117495448] [2024-06-04 15:20:58,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117495448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:58,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:58,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:20:58,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893625082] [2024-06-04 15:20:58,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:58,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:20:58,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:20:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:20:58,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:20:58,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 756 transitions, 12190 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) [2024-06-04 15:20:58,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:58,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:20:58,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:00,759 INFO L124 PetriNetUnfolderBase]: 4370/6915 cut-off events. [2024-06-04 15:21:00,759 INFO L125 PetriNetUnfolderBase]: For 1564933/1564935 co-relation queries the response was YES. [2024-06-04 15:21:00,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80982 conditions, 6915 events. 4370/6915 cut-off events. For 1564933/1564935 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42722 event pairs, 835 based on Foata normal form. 6/6915 useless extension candidates. Maximal degree in co-relation 80771. Up to 5088 conditions per place. [2024-06-04 15:21:00,888 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 252 changer transitions 0/774 dead transitions. [2024-06-04 15:21:00,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 774 transitions, 14354 flow [2024-06-04 15:21:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:21:00,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:21:00,889 INFO L175 Difference]: Start difference. First operand has 459 places, 756 transitions, 12190 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:21:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 774 transitions, 14354 flow [2024-06-04 15:21:07,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 774 transitions, 13758 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-04 15:21:07,957 INFO L231 Difference]: Finished difference. Result has 463 places, 756 transitions, 12108 flow [2024-06-04 15:21:07,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11594, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12108, PETRI_PLACES=463, PETRI_TRANSITIONS=756} [2024-06-04 15:21:07,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 419 predicate places. [2024-06-04 15:21:07,959 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 756 transitions, 12108 flow [2024-06-04 15:21:07,959 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) [2024-06-04 15:21:07,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:07,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:21:07,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 15:21:07,959 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)] === [2024-06-04 15:21:07,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash 296288623, now seen corresponding path program 15 times [2024-06-04 15:21:07,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:07,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796820842] [2024-06-04 15:21:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:07,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:08,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:08,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796820842] [2024-06-04 15:21:08,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796820842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:08,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:08,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615769719] [2024-06-04 15:21:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:08,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:08,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:08,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:09,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:21:09,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 756 transitions, 12108 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) [2024-06-04 15:21:09,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:09,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:21:09,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:10,934 INFO L124 PetriNetUnfolderBase]: 4406/6967 cut-off events. [2024-06-04 15:21:10,935 INFO L125 PetriNetUnfolderBase]: For 1603876/1603878 co-relation queries the response was YES. [2024-06-04 15:21:11,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81831 conditions, 6967 events. 4406/6967 cut-off events. For 1603876/1603878 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 42977 event pairs, 841 based on Foata normal form. 6/6967 useless extension candidates. Maximal degree in co-relation 81619. Up to 5107 conditions per place. [2024-06-04 15:21:11,076 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 510 selfloop transitions, 268 changer transitions 0/783 dead transitions. [2024-06-04 15:21:11,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 783 transitions, 14596 flow [2024-06-04 15:21:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:21:11,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:21:11,077 INFO L175 Difference]: Start difference. First operand has 463 places, 756 transitions, 12108 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:21:11,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 783 transitions, 14596 flow [2024-06-04 15:21:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 783 transitions, 14105 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 15:21:18,566 INFO L231 Difference]: Finished difference. Result has 466 places, 765 transitions, 12510 flow [2024-06-04 15:21:18,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11627, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12510, PETRI_PLACES=466, PETRI_TRANSITIONS=765} [2024-06-04 15:21:18,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-04 15:21:18,566 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 765 transitions, 12510 flow [2024-06-04 15:21:18,566 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) [2024-06-04 15:21:18,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:18,566 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] [2024-06-04 15:21:18,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 15:21:18,567 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)] === [2024-06-04 15:21:18,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1342588555, now seen corresponding path program 16 times [2024-06-04 15:21:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412575787] [2024-06-04 15:21:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412575787] [2024-06-04 15:21:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412575787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:19,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:19,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923380044] [2024-06-04 15:21:19,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:19,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:19,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:19,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:19,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:21:19,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 765 transitions, 12510 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) [2024-06-04 15:21:19,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:19,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:21:19,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:21,520 INFO L124 PetriNetUnfolderBase]: 4426/7027 cut-off events. [2024-06-04 15:21:21,520 INFO L125 PetriNetUnfolderBase]: For 1631047/1631049 co-relation queries the response was YES. [2024-06-04 15:21:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82617 conditions, 7027 events. 4426/7027 cut-off events. For 1631047/1631049 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43782 event pairs, 811 based on Foata normal form. 6/7027 useless extension candidates. Maximal degree in co-relation 82403. Up to 5123 conditions per place. [2024-06-04 15:21:21,650 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 511 selfloop transitions, 272 changer transitions 0/788 dead transitions. [2024-06-04 15:21:21,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 788 transitions, 15104 flow [2024-06-04 15:21:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-04 15:21:21,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 15:21:21,651 INFO L175 Difference]: Start difference. First operand has 466 places, 765 transitions, 12510 flow. Second operand 9 states and 172 transitions. [2024-06-04 15:21:21,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 788 transitions, 15104 flow [2024-06-04 15:21:28,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 788 transitions, 14591 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-04 15:21:28,473 INFO L231 Difference]: Finished difference. Result has 470 places, 769 transitions, 12678 flow [2024-06-04 15:21:28,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12678, PETRI_PLACES=470, PETRI_TRANSITIONS=769} [2024-06-04 15:21:28,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-04 15:21:28,474 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 769 transitions, 12678 flow [2024-06-04 15:21:28,474 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) [2024-06-04 15:21:28,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:28,474 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] [2024-06-04 15:21:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 15:21:28,474 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)] === [2024-06-04 15:21:28,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:28,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1752579389, now seen corresponding path program 17 times [2024-06-04 15:21:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182327282] [2024-06-04 15:21:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:29,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182327282] [2024-06-04 15:21:29,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182327282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:29,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:29,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895866542] [2024-06-04 15:21:29,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:29,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:21:29,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 769 transitions, 12678 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) [2024-06-04 15:21:29,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:29,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:21:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:31,394 INFO L124 PetriNetUnfolderBase]: 4452/7073 cut-off events. [2024-06-04 15:21:31,394 INFO L125 PetriNetUnfolderBase]: For 1653478/1653480 co-relation queries the response was YES. [2024-06-04 15:21:31,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83438 conditions, 7073 events. 4452/7073 cut-off events. For 1653478/1653480 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 44204 event pairs, 837 based on Foata normal form. 4/7071 useless extension candidates. Maximal degree in co-relation 83223. Up to 5138 conditions per place. [2024-06-04 15:21:31,527 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 478 selfloop transitions, 312 changer transitions 0/795 dead transitions. [2024-06-04 15:21:31,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 795 transitions, 15390 flow [2024-06-04 15:21:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:21:31,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:21:31,528 INFO L175 Difference]: Start difference. First operand has 470 places, 769 transitions, 12678 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:21:31,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 795 transitions, 15390 flow [2024-06-04 15:21:38,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 795 transitions, 14803 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 15:21:38,483 INFO L231 Difference]: Finished difference. Result has 474 places, 776 transitions, 12958 flow [2024-06-04 15:21:38,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12099, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12958, PETRI_PLACES=474, PETRI_TRANSITIONS=776} [2024-06-04 15:21:38,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-04 15:21:38,484 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 776 transitions, 12958 flow [2024-06-04 15:21:38,484 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) [2024-06-04 15:21:38,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:38,484 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] [2024-06-04 15:21:38,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 15:21:38,484 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)] === [2024-06-04 15:21:38,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1585176639, now seen corresponding path program 18 times [2024-06-04 15:21:38,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:38,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311052588] [2024-06-04 15:21:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:38,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:39,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:39,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311052588] [2024-06-04 15:21:39,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311052588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:39,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:39,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:39,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449000123] [2024-06-04 15:21:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:39,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:39,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:39,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:21:39,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 776 transitions, 12958 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) [2024-06-04 15:21:39,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:39,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:21:39,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:41,603 INFO L124 PetriNetUnfolderBase]: 4462/7091 cut-off events. [2024-06-04 15:21:41,603 INFO L125 PetriNetUnfolderBase]: For 1675624/1675626 co-relation queries the response was YES. [2024-06-04 15:21:41,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83833 conditions, 7091 events. 4462/7091 cut-off events. For 1675624/1675626 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 44407 event pairs, 822 based on Foata normal form. 4/7089 useless extension candidates. Maximal degree in co-relation 83616. Up to 5144 conditions per place. [2024-06-04 15:21:41,746 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 475 selfloop transitions, 319 changer transitions 0/799 dead transitions. [2024-06-04 15:21:41,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 799 transitions, 15585 flow [2024-06-04 15:21:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:21:41,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:21:41,748 INFO L175 Difference]: Start difference. First operand has 474 places, 776 transitions, 12958 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:21:41,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 799 transitions, 15585 flow [2024-06-04 15:21:49,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 799 transitions, 15155 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-04 15:21:49,905 INFO L231 Difference]: Finished difference. Result has 479 places, 780 transitions, 13297 flow [2024-06-04 15:21:49,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12547, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13297, PETRI_PLACES=479, PETRI_TRANSITIONS=780} [2024-06-04 15:21:49,905 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-04 15:21:49,906 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 780 transitions, 13297 flow [2024-06-04 15:21:49,906 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) [2024-06-04 15:21:49,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:21:49,906 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] [2024-06-04 15:21:49,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 15:21:49,906 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)] === [2024-06-04 15:21:49,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:21:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1187751697, now seen corresponding path program 19 times [2024-06-04 15:21:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:21:49,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498867894] [2024-06-04 15:21:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:21:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:21:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:21:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:21:50,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:21:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498867894] [2024-06-04 15:21:50,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498867894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:21:50,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:21:50,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:21:50,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627394655] [2024-06-04 15:21:50,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:21:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:21:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:21:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:21:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:21:51,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:21:51,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 780 transitions, 13297 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) [2024-06-04 15:21:51,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:21:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:21:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:21:53,163 INFO L124 PetriNetUnfolderBase]: 4456/7079 cut-off events. [2024-06-04 15:21:53,164 INFO L125 PetriNetUnfolderBase]: For 1681671/1681673 co-relation queries the response was YES. [2024-06-04 15:21:53,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83751 conditions, 7079 events. 4456/7079 cut-off events. For 1681671/1681673 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44333 event pairs, 761 based on Foata normal form. 4/7077 useless extension candidates. Maximal degree in co-relation 83533. Up to 5141 conditions per place. [2024-06-04 15:21:53,298 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 471 selfloop transitions, 322 changer transitions 0/798 dead transitions. [2024-06-04 15:21:53,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 798 transitions, 15529 flow [2024-06-04 15:21:53,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:21:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:21:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:21:53,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:21:53,299 INFO L175 Difference]: Start difference. First operand has 479 places, 780 transitions, 13297 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:21:53,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 798 transitions, 15529 flow [2024-06-04 15:22:00,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 798 transitions, 15085 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-04 15:22:00,368 INFO L231 Difference]: Finished difference. Result has 484 places, 780 transitions, 13503 flow [2024-06-04 15:22:00,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12853, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13503, PETRI_PLACES=484, PETRI_TRANSITIONS=780} [2024-06-04 15:22:00,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-04 15:22:00,369 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 780 transitions, 13503 flow [2024-06-04 15:22:00,369 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) [2024-06-04 15:22:00,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:00,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:22:00,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 15:22:00,369 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)] === [2024-06-04 15:22:00,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1187901427, now seen corresponding path program 20 times [2024-06-04 15:22:00,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:00,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138639054] [2024-06-04 15:22:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:00,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:01,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138639054] [2024-06-04 15:22:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138639054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:01,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:01,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:22:01,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645019926] [2024-06-04 15:22:01,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:01,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:22:01,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:22:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:22:01,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:22:01,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 780 transitions, 13503 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) [2024-06-04 15:22:01,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:01,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:22:01,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:03,328 INFO L124 PetriNetUnfolderBase]: 4444/7063 cut-off events. [2024-06-04 15:22:03,328 INFO L125 PetriNetUnfolderBase]: For 1686638/1686640 co-relation queries the response was YES. [2024-06-04 15:22:03,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83390 conditions, 7063 events. 4444/7063 cut-off events. For 1686638/1686640 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44214 event pairs, 759 based on Foata normal form. 6/7063 useless extension candidates. Maximal degree in co-relation 83171. Up to 5133 conditions per place. [2024-06-04 15:22:03,475 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 490 selfloop transitions, 303 changer transitions 0/798 dead transitions. [2024-06-04 15:22:03,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 798 transitions, 15739 flow [2024-06-04 15:22:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:22:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:22:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:22:03,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:22:03,476 INFO L175 Difference]: Start difference. First operand has 484 places, 780 transitions, 13503 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:22:03,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 798 transitions, 15739 flow [2024-06-04 15:22:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 798 transitions, 15144 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 15:22:11,233 INFO L231 Difference]: Finished difference. Result has 486 places, 780 transitions, 13522 flow [2024-06-04 15:22:11,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12908, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13522, PETRI_PLACES=486, PETRI_TRANSITIONS=780} [2024-06-04 15:22:11,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-04 15:22:11,234 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 780 transitions, 13522 flow [2024-06-04 15:22:11,234 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) [2024-06-04 15:22:11,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:11,235 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] [2024-06-04 15:22:11,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 15:22:11,235 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:22:11,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1616265007, now seen corresponding path program 21 times [2024-06-04 15:22:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389078761] [2024-06-04 15:22:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:12,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:12,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389078761] [2024-06-04 15:22:12,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389078761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:12,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:12,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:22:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683770055] [2024-06-04 15:22:12,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:12,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:22:12,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:12,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:22:12,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:22:12,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:22:12,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 780 transitions, 13522 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) [2024-06-04 15:22:12,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:12,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:22:12,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:14,490 INFO L124 PetriNetUnfolderBase]: 4432/7041 cut-off events. [2024-06-04 15:22:14,490 INFO L125 PetriNetUnfolderBase]: For 1667996/1667998 co-relation queries the response was YES. [2024-06-04 15:22:14,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82815 conditions, 7041 events. 4432/7041 cut-off events. For 1667996/1667998 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43987 event pairs, 813 based on Foata normal form. 6/7041 useless extension candidates. Maximal degree in co-relation 82595. Up to 5125 conditions per place. [2024-06-04 15:22:14,615 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 511 selfloop transitions, 282 changer transitions 0/798 dead transitions. [2024-06-04 15:22:14,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 798 transitions, 15762 flow [2024-06-04 15:22:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:22:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:22:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 15:22:14,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:22:14,617 INFO L175 Difference]: Start difference. First operand has 486 places, 780 transitions, 13522 flow. Second operand 9 states and 171 transitions. [2024-06-04 15:22:14,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 798 transitions, 15762 flow [2024-06-04 15:22:21,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 798 transitions, 15110 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 15:22:21,557 INFO L231 Difference]: Finished difference. Result has 489 places, 780 transitions, 13441 flow [2024-06-04 15:22:21,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12870, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13441, PETRI_PLACES=489, PETRI_TRANSITIONS=780} [2024-06-04 15:22:21,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-04 15:22:21,558 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 780 transitions, 13441 flow [2024-06-04 15:22:21,558 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) [2024-06-04 15:22:21,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:21,558 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] [2024-06-04 15:22:21,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 15:22:21,558 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:22:21,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 72978445, now seen corresponding path program 22 times [2024-06-04 15:22:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:21,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852623739] [2024-06-04 15:22:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852623739] [2024-06-04 15:22:22,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852623739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:22,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:22,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:22:22,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351179202] [2024-06-04 15:22:22,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:22:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:22:22,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:22:22,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:22:22,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 780 transitions, 13441 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) [2024-06-04 15:22:22,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:22,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:22:22,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:24,477 INFO L124 PetriNetUnfolderBase]: 4422/6995 cut-off events. [2024-06-04 15:22:24,477 INFO L125 PetriNetUnfolderBase]: For 1646199/1646201 co-relation queries the response was YES. [2024-06-04 15:22:24,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82270 conditions, 6995 events. 4422/6995 cut-off events. For 1646199/1646201 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43242 event pairs, 851 based on Foata normal form. 4/6993 useless extension candidates. Maximal degree in co-relation 82049. Up to 5117 conditions per place. [2024-06-04 15:22:24,616 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 322 changer transitions 0/797 dead transitions. [2024-06-04 15:22:24,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 797 transitions, 15403 flow [2024-06-04 15:22:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:22:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:22:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 15:22:24,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-04 15:22:24,618 INFO L175 Difference]: Start difference. First operand has 489 places, 780 transitions, 13441 flow. Second operand 9 states and 168 transitions. [2024-06-04 15:22:24,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 797 transitions, 15403 flow [2024-06-04 15:22:32,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 797 transitions, 14790 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 15:22:32,938 INFO L231 Difference]: Finished difference. Result has 491 places, 780 transitions, 13478 flow [2024-06-04 15:22:32,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12828, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13478, PETRI_PLACES=491, PETRI_TRANSITIONS=780} [2024-06-04 15:22:32,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-04 15:22:32,938 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 780 transitions, 13478 flow [2024-06-04 15:22:32,938 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) [2024-06-04 15:22:32,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:32,939 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] [2024-06-04 15:22:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 15:22:32,939 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:22:32,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 85865455, now seen corresponding path program 23 times [2024-06-04 15:22:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:32,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108930601] [2024-06-04 15:22:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:33,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:33,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108930601] [2024-06-04 15:22:33,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108930601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:33,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:33,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:22:33,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459271634] [2024-06-04 15:22:33,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:33,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:22:33,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:22:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:22:33,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:22:33,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 780 transitions, 13478 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) [2024-06-04 15:22:33,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:33,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:22:33,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:36,521 INFO L124 PetriNetUnfolderBase]: 4412/6991 cut-off events. [2024-06-04 15:22:36,521 INFO L125 PetriNetUnfolderBase]: For 1647266/1647268 co-relation queries the response was YES. [2024-06-04 15:22:36,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82021 conditions, 6991 events. 4412/6991 cut-off events. For 1647266/1647268 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 43391 event pairs, 847 based on Foata normal form. 4/6989 useless extension candidates. Maximal degree in co-relation 81799. Up to 5109 conditions per place. [2024-06-04 15:22:36,648 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 470 selfloop transitions, 322 changer transitions 0/797 dead transitions. [2024-06-04 15:22:36,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 797 transitions, 15442 flow [2024-06-04 15:22:36,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:22:36,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:22:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 15:22:36,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-04 15:22:36,649 INFO L175 Difference]: Start difference. First operand has 491 places, 780 transitions, 13478 flow. Second operand 9 states and 170 transitions. [2024-06-04 15:22:36,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 797 transitions, 15442 flow [2024-06-04 15:22:45,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 797 transitions, 14390 flow, removed 52 selfloop flow, removed 14 redundant places. [2024-06-04 15:22:45,042 INFO L231 Difference]: Finished difference. Result has 486 places, 780 transitions, 13076 flow [2024-06-04 15:22:45,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12426, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13076, PETRI_PLACES=486, PETRI_TRANSITIONS=780} [2024-06-04 15:22:45,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-04 15:22:45,043 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 780 transitions, 13076 flow [2024-06-04 15:22:45,043 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) [2024-06-04 15:22:45,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:45,043 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] [2024-06-04 15:22:45,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 15:22:45,043 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:22:45,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash 86310925, now seen corresponding path program 24 times [2024-06-04 15:22:45,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:45,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889780267] [2024-06-04 15:22:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:45,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:45,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889780267] [2024-06-04 15:22:45,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889780267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:45,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:45,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:22:45,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605375722] [2024-06-04 15:22:45,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:45,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:22:45,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:22:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:22:46,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:22:46,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 780 transitions, 13076 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) [2024-06-04 15:22:46,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:46,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:22:46,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:22:48,592 INFO L124 PetriNetUnfolderBase]: 4402/6979 cut-off events. [2024-06-04 15:22:48,592 INFO L125 PetriNetUnfolderBase]: For 1643825/1643827 co-relation queries the response was YES. [2024-06-04 15:22:48,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81041 conditions, 6979 events. 4402/6979 cut-off events. For 1643825/1643827 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 43412 event pairs, 849 based on Foata normal form. 4/6977 useless extension candidates. Maximal degree in co-relation 80821. Up to 5101 conditions per place. [2024-06-04 15:22:48,727 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 465 selfloop transitions, 326 changer transitions 0/796 dead transitions. [2024-06-04 15:22:48,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 796 transitions, 14756 flow [2024-06-04 15:22:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:22:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:22:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:22:48,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-04 15:22:48,728 INFO L175 Difference]: Start difference. First operand has 486 places, 780 transitions, 13076 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:22:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 796 transitions, 14756 flow [2024-06-04 15:22:57,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 796 transitions, 13497 flow, removed 31 selfloop flow, removed 13 redundant places. [2024-06-04 15:22:57,630 INFO L231 Difference]: Finished difference. Result has 482 places, 780 transitions, 12475 flow [2024-06-04 15:22:57,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11817, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12475, PETRI_PLACES=482, PETRI_TRANSITIONS=780} [2024-06-04 15:22:57,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-04 15:22:57,630 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 780 transitions, 12475 flow [2024-06-04 15:22:57,631 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) [2024-06-04 15:22:57,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:22:57,631 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] [2024-06-04 15:22:57,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 15:22:57,631 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:22:57,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:22:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1115502899, now seen corresponding path program 3 times [2024-06-04 15:22:57,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:22:57,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384755751] [2024-06-04 15:22:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:22:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:22:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:22:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:22:58,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:22:58,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384755751] [2024-06-04 15:22:58,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384755751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:22:58,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:22:58,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:22:58,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520086301] [2024-06-04 15:22:58,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:22:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:22:58,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:22:58,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:22:58,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:22:58,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:22:58,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 780 transitions, 12475 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:22:58,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:22:58,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:22:58,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:01,314 INFO L124 PetriNetUnfolderBase]: 4407/6917 cut-off events. [2024-06-04 15:23:01,314 INFO L125 PetriNetUnfolderBase]: For 1638080/1638097 co-relation queries the response was YES. [2024-06-04 15:23:01,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80708 conditions, 6917 events. 4407/6917 cut-off events. For 1638080/1638097 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42159 event pairs, 1179 based on Foata normal form. 17/6931 useless extension candidates. Maximal degree in co-relation 80488. Up to 6422 conditions per place. [2024-06-04 15:23:01,444 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 722 selfloop transitions, 68 changer transitions 0/795 dead transitions. [2024-06-04 15:23:01,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 795 transitions, 14243 flow [2024-06-04 15:23:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:23:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:23:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 15:23:01,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-04 15:23:01,445 INFO L175 Difference]: Start difference. First operand has 482 places, 780 transitions, 12475 flow. Second operand 10 states and 170 transitions. [2024-06-04 15:23:01,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 795 transitions, 14243 flow [2024-06-04 15:23:09,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 795 transitions, 13406 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 15:23:09,810 INFO L231 Difference]: Finished difference. Result has 482 places, 783 transitions, 11944 flow [2024-06-04 15:23:09,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11638, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11944, PETRI_PLACES=482, PETRI_TRANSITIONS=783} [2024-06-04 15:23:09,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-04 15:23:09,811 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 783 transitions, 11944 flow [2024-06-04 15:23:09,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:09,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:09,812 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] [2024-06-04 15:23:09,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 15:23:09,812 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:23:09,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:09,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1115503364, now seen corresponding path program 10 times [2024-06-04 15:23:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:09,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883135938] [2024-06-04 15:23:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:09,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883135938] [2024-06-04 15:23:10,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883135938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:10,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:10,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:23:10,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56592297] [2024-06-04 15:23:10,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:10,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:23:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:23:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:23:10,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:23:10,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 783 transitions, 11944 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:10,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:10,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:23:10,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:13,347 INFO L124 PetriNetUnfolderBase]: 4482/7052 cut-off events. [2024-06-04 15:23:13,347 INFO L125 PetriNetUnfolderBase]: For 1778546/1778548 co-relation queries the response was YES. [2024-06-04 15:23:13,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82626 conditions, 7052 events. 4482/7052 cut-off events. For 1778546/1778548 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43371 event pairs, 863 based on Foata normal form. 5/7051 useless extension candidates. Maximal degree in co-relation 82405. Up to 4699 conditions per place. [2024-06-04 15:23:13,495 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 522 selfloop transitions, 291 changer transitions 0/818 dead transitions. [2024-06-04 15:23:13,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 818 transitions, 15330 flow [2024-06-04 15:23:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:23:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:23:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:23:13,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:23:13,497 INFO L175 Difference]: Start difference. First operand has 482 places, 783 transitions, 11944 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:23:13,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 818 transitions, 15330 flow [2024-06-04 15:23:21,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 818 transitions, 15046 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-04 15:23:21,716 INFO L231 Difference]: Finished difference. Result has 485 places, 794 transitions, 12808 flow [2024-06-04 15:23:21,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11660, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12808, PETRI_PLACES=485, PETRI_TRANSITIONS=794} [2024-06-04 15:23:21,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-04 15:23:21,717 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 794 transitions, 12808 flow [2024-06-04 15:23:21,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:21,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:21,717 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] [2024-06-04 15:23:21,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 15:23:21,718 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:23:21,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1615988642, now seen corresponding path program 11 times [2024-06-04 15:23:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:21,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610491831] [2024-06-04 15:23:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:21,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:22,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:22,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610491831] [2024-06-04 15:23:22,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610491831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:22,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:22,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:23:22,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628677187] [2024-06-04 15:23:22,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:22,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:23:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:23:22,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:23:22,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:23:22,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 794 transitions, 12808 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:22,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:22,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:23:22,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:25,354 INFO L124 PetriNetUnfolderBase]: 4541/7174 cut-off events. [2024-06-04 15:23:25,354 INFO L125 PetriNetUnfolderBase]: For 1878891/1878893 co-relation queries the response was YES. [2024-06-04 15:23:25,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86545 conditions, 7174 events. 4541/7174 cut-off events. For 1878891/1878893 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44658 event pairs, 835 based on Foata normal form. 5/7173 useless extension candidates. Maximal degree in co-relation 86322. Up to 4748 conditions per place. [2024-06-04 15:23:25,484 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 514 selfloop transitions, 308 changer transitions 0/827 dead transitions. [2024-06-04 15:23:25,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 827 transitions, 16212 flow [2024-06-04 15:23:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:23:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:23:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 15:23:25,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-04 15:23:25,485 INFO L175 Difference]: Start difference. First operand has 485 places, 794 transitions, 12808 flow. Second operand 10 states and 191 transitions. [2024-06-04 15:23:25,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 827 transitions, 16212 flow [2024-06-04 15:23:33,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 827 transitions, 15635 flow, removed 155 selfloop flow, removed 5 redundant places. [2024-06-04 15:23:33,147 INFO L231 Difference]: Finished difference. Result has 491 places, 802 transitions, 13296 flow [2024-06-04 15:23:33,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12267, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13296, PETRI_PLACES=491, PETRI_TRANSITIONS=802} [2024-06-04 15:23:33,147 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-04 15:23:33,148 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 802 transitions, 13296 flow [2024-06-04 15:23:33,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:33,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:33,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:23:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 15:23:33,148 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:23:33,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2140714875, now seen corresponding path program 4 times [2024-06-04 15:23:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:33,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445249331] [2024-06-04 15:23:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:34,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:34,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445249331] [2024-06-04 15:23:34,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445249331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:34,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:34,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:23:34,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672705254] [2024-06-04 15:23:34,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:23:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:23:34,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:23:34,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:23:34,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 802 transitions, 13296 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:23:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:36,961 INFO L124 PetriNetUnfolderBase]: 4546/7119 cut-off events. [2024-06-04 15:23:36,961 INFO L125 PetriNetUnfolderBase]: For 1882890/1882907 co-relation queries the response was YES. [2024-06-04 15:23:37,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87465 conditions, 7119 events. 4546/7119 cut-off events. For 1882890/1882907 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43595 event pairs, 1203 based on Foata normal form. 17/7133 useless extension candidates. Maximal degree in co-relation 87239. Up to 6615 conditions per place. [2024-06-04 15:23:37,099 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 742 selfloop transitions, 70 changer transitions 0/817 dead transitions. [2024-06-04 15:23:37,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 817 transitions, 15122 flow [2024-06-04 15:23:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:23:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:23:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-04 15:23:37,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-04 15:23:37,101 INFO L175 Difference]: Start difference. First operand has 491 places, 802 transitions, 13296 flow. Second operand 10 states and 169 transitions. [2024-06-04 15:23:37,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 817 transitions, 15122 flow [2024-06-04 15:23:45,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 817 transitions, 14271 flow, removed 114 selfloop flow, removed 7 redundant places. [2024-06-04 15:23:45,128 INFO L231 Difference]: Finished difference. Result has 494 places, 805 transitions, 12769 flow [2024-06-04 15:23:45,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12445, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12769, PETRI_PLACES=494, PETRI_TRANSITIONS=805} [2024-06-04 15:23:45,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 450 predicate places. [2024-06-04 15:23:45,129 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 805 transitions, 12769 flow [2024-06-04 15:23:45,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:45,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:45,129 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] [2024-06-04 15:23:45,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 15:23:45,129 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:23:45,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1187459057, now seen corresponding path program 5 times [2024-06-04 15:23:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:45,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966666969] [2024-06-04 15:23:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:45,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966666969] [2024-06-04 15:23:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966666969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:46,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:46,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:23:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208185115] [2024-06-04 15:23:46,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:46,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:23:46,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:23:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:23:46,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:23:46,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 805 transitions, 12769 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:46,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:46,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:23:46,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:49,047 INFO L124 PetriNetUnfolderBase]: 4551/7121 cut-off events. [2024-06-04 15:23:49,047 INFO L125 PetriNetUnfolderBase]: For 1898145/1898145 co-relation queries the response was YES. [2024-06-04 15:23:49,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86453 conditions, 7121 events. 4551/7121 cut-off events. For 1898145/1898145 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43551 event pairs, 1522 based on Foata normal form. 1/7121 useless extension candidates. Maximal degree in co-relation 86226. Up to 6697 conditions per place. [2024-06-04 15:23:49,201 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 791 selfloop transitions, 24 changer transitions 0/820 dead transitions. [2024-06-04 15:23:49,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 820 transitions, 14607 flow [2024-06-04 15:23:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:23:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:23:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-04 15:23:49,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-04 15:23:49,202 INFO L175 Difference]: Start difference. First operand has 494 places, 805 transitions, 12769 flow. Second operand 10 states and 162 transitions. [2024-06-04 15:23:49,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 820 transitions, 14607 flow [2024-06-04 15:23:56,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 820 transitions, 14305 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-04 15:23:56,377 INFO L231 Difference]: Finished difference. Result has 496 places, 808 transitions, 12705 flow [2024-06-04 15:23:56,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12467, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12705, PETRI_PLACES=496, PETRI_TRANSITIONS=808} [2024-06-04 15:23:56,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 452 predicate places. [2024-06-04 15:23:56,377 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 808 transitions, 12705 flow [2024-06-04 15:23:56,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:56,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:23:56,378 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] [2024-06-04 15:23:56,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 15:23:56,378 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:23:56,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:23:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1539466396, now seen corresponding path program 12 times [2024-06-04 15:23:56,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:23:56,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524466163] [2024-06-04 15:23:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:23:56,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:23:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:23:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:23:57,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:23:57,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524466163] [2024-06-04 15:23:57,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524466163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:23:57,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:23:57,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:23:57,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775075996] [2024-06-04 15:23:57,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:23:57,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:23:57,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:23:57,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:23:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:23:57,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:23:57,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 808 transitions, 12705 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:23:57,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:23:57,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:23:57,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:23:59,967 INFO L124 PetriNetUnfolderBase]: 4614/7243 cut-off events. [2024-06-04 15:23:59,968 INFO L125 PetriNetUnfolderBase]: For 2012598/2012600 co-relation queries the response was YES. [2024-06-04 15:24:00,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88681 conditions, 7243 events. 4614/7243 cut-off events. For 2012598/2012600 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 44559 event pairs, 893 based on Foata normal form. 5/7245 useless extension candidates. Maximal degree in co-relation 88453. Up to 4821 conditions per place. [2024-06-04 15:24:00,109 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 498 selfloop transitions, 341 changer transitions 0/844 dead transitions. [2024-06-04 15:24:00,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 844 transitions, 16078 flow [2024-06-04 15:24:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:24:00,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:24:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:24:00,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:24:00,110 INFO L175 Difference]: Start difference. First operand has 496 places, 808 transitions, 12705 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:24:00,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 844 transitions, 16078 flow [2024-06-04 15:24:07,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 844 transitions, 15862 flow, removed 86 selfloop flow, removed 8 redundant places. [2024-06-04 15:24:07,911 INFO L231 Difference]: Finished difference. Result has 499 places, 823 transitions, 13996 flow [2024-06-04 15:24:07,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12489, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13996, PETRI_PLACES=499, PETRI_TRANSITIONS=823} [2024-06-04 15:24:07,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-04 15:24:07,912 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 823 transitions, 13996 flow [2024-06-04 15:24:07,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:07,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:24:07,912 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] [2024-06-04 15:24:07,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 15:24:07,912 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:24:07,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:24:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1187904992, now seen corresponding path program 13 times [2024-06-04 15:24:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:24:07,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483939301] [2024-06-04 15:24:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:24:07,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:24:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:24:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:24:08,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:24:08,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483939301] [2024-06-04 15:24:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483939301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:24:08,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:24:08,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:24:08,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114442188] [2024-06-04 15:24:08,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:24:08,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:24:08,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:24:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:24:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:24:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:24:09,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 823 transitions, 13996 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:09,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:24:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:24:09,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:24:11,692 INFO L124 PetriNetUnfolderBase]: 4629/7304 cut-off events. [2024-06-04 15:24:11,692 INFO L125 PetriNetUnfolderBase]: For 2049143/2049145 co-relation queries the response was YES. [2024-06-04 15:24:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90890 conditions, 7304 events. 4629/7304 cut-off events. For 2049143/2049145 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45444 event pairs, 745 based on Foata normal form. 5/7303 useless extension candidates. Maximal degree in co-relation 90660. Up to 4835 conditions per place. [2024-06-04 15:24:11,838 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 495 selfloop transitions, 349 changer transitions 0/849 dead transitions. [2024-06-04 15:24:11,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 849 transitions, 17022 flow [2024-06-04 15:24:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:24:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:24:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-04 15:24:11,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-04 15:24:11,840 INFO L175 Difference]: Start difference. First operand has 499 places, 823 transitions, 13996 flow. Second operand 10 states and 190 transitions. [2024-06-04 15:24:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 849 transitions, 17022 flow [2024-06-04 15:24:20,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 849 transitions, 16471 flow, removed 163 selfloop flow, removed 5 redundant places. [2024-06-04 15:24:20,169 INFO L231 Difference]: Finished difference. Result has 504 places, 828 transitions, 14482 flow [2024-06-04 15:24:20,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13487, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14482, PETRI_PLACES=504, PETRI_TRANSITIONS=828} [2024-06-04 15:24:20,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 460 predicate places. [2024-06-04 15:24:20,170 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 828 transitions, 14482 flow [2024-06-04 15:24:20,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:20,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:24:20,170 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] [2024-06-04 15:24:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 15:24:20,170 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:24:20,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:24:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1115516384, now seen corresponding path program 14 times [2024-06-04 15:24:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:24:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422191931] [2024-06-04 15:24:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:24:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:24:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:24:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:24:21,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:24:21,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422191931] [2024-06-04 15:24:21,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422191931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:24:21,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:24:21,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:24:21,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373871867] [2024-06-04 15:24:21,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:24:21,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:24:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:24:21,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:24:21,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:24:21,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:24:21,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 828 transitions, 14482 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:21,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:24:21,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:24:21,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:24:23,843 INFO L124 PetriNetUnfolderBase]: 4644/7295 cut-off events. [2024-06-04 15:24:23,843 INFO L125 PetriNetUnfolderBase]: For 2053902/2053904 co-relation queries the response was YES. [2024-06-04 15:24:23,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92082 conditions, 7295 events. 4644/7295 cut-off events. For 2053902/2053904 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 44985 event pairs, 875 based on Foata normal form. 5/7294 useless extension candidates. Maximal degree in co-relation 91850. Up to 4849 conditions per place. [2024-06-04 15:24:24,209 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 534 selfloop transitions, 315 changer transitions 0/854 dead transitions. [2024-06-04 15:24:24,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 854 transitions, 17487 flow [2024-06-04 15:24:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:24:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:24:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 15:24:24,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-04 15:24:24,213 INFO L175 Difference]: Start difference. First operand has 504 places, 828 transitions, 14482 flow. Second operand 10 states and 193 transitions. [2024-06-04 15:24:24,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 854 transitions, 17487 flow [2024-06-04 15:24:32,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 854 transitions, 16770 flow, removed 102 selfloop flow, removed 6 redundant places. [2024-06-04 15:24:32,449 INFO L231 Difference]: Finished difference. Result has 508 places, 832 transitions, 14604 flow [2024-06-04 15:24:32,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13772, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14604, PETRI_PLACES=508, PETRI_TRANSITIONS=832} [2024-06-04 15:24:32,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-04 15:24:32,450 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 832 transitions, 14604 flow [2024-06-04 15:24:32,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:32,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:24:32,450 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] [2024-06-04 15:24:32,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 15:24:32,450 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:24:32,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:24:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1640617872, now seen corresponding path program 15 times [2024-06-04 15:24:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:24:32,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489218652] [2024-06-04 15:24:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:24:32,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:24:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:24:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:24:33,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:24:33,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489218652] [2024-06-04 15:24:33,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489218652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:24:33,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:24:33,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:24:33,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271305954] [2024-06-04 15:24:33,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:24:33,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:24:33,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:24:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:24:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:24:33,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:24:33,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 832 transitions, 14604 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:33,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:24:33,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:24:33,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:24:36,132 INFO L124 PetriNetUnfolderBase]: 4635/7281 cut-off events. [2024-06-04 15:24:36,132 INFO L125 PetriNetUnfolderBase]: For 2038303/2038305 co-relation queries the response was YES. [2024-06-04 15:24:36,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91320 conditions, 7281 events. 4635/7281 cut-off events. For 2038303/2038305 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44804 event pairs, 873 based on Foata normal form. 5/7280 useless extension candidates. Maximal degree in co-relation 91087. Up to 4842 conditions per place. [2024-06-04 15:24:36,270 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 532 selfloop transitions, 317 changer transitions 0/854 dead transitions. [2024-06-04 15:24:36,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 854 transitions, 17417 flow [2024-06-04 15:24:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:24:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:24:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 15:24:36,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-04 15:24:36,271 INFO L175 Difference]: Start difference. First operand has 508 places, 832 transitions, 14604 flow. Second operand 10 states and 194 transitions. [2024-06-04 15:24:36,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 854 transitions, 17417 flow [2024-06-04 15:24:45,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 854 transitions, 16668 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-04 15:24:45,902 INFO L231 Difference]: Finished difference. Result has 511 places, 833 transitions, 14593 flow [2024-06-04 15:24:45,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13855, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14593, PETRI_PLACES=511, PETRI_TRANSITIONS=833} [2024-06-04 15:24:45,903 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 467 predicate places. [2024-06-04 15:24:45,903 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 833 transitions, 14593 flow [2024-06-04 15:24:45,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:45,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:24:45,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:24:45,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 15:24:45,904 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:24:45,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:24:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2140728360, now seen corresponding path program 16 times [2024-06-04 15:24:45,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:24:45,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219265822] [2024-06-04 15:24:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:24:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:24:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:24:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:24:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:24:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219265822] [2024-06-04 15:24:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219265822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:24:46,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:24:46,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:24:46,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521408937] [2024-06-04 15:24:46,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:24:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:24:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:24:46,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:24:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:24:47,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:24:47,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 833 transitions, 14593 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:47,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:24:47,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:24:47,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:24:49,712 INFO L124 PetriNetUnfolderBase]: 4650/7336 cut-off events. [2024-06-04 15:24:49,712 INFO L125 PetriNetUnfolderBase]: For 2072479/2072481 co-relation queries the response was YES. [2024-06-04 15:24:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91693 conditions, 7336 events. 4650/7336 cut-off events. For 2072479/2072481 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45614 event pairs, 865 based on Foata normal form. 5/7335 useless extension candidates. Maximal degree in co-relation 91459. Up to 4856 conditions per place. [2024-06-04 15:24:49,851 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 523 selfloop transitions, 330 changer transitions 0/858 dead transitions. [2024-06-04 15:24:49,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 858 transitions, 17528 flow [2024-06-04 15:24:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:24:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:24:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 15:24:49,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-04 15:24:49,853 INFO L175 Difference]: Start difference. First operand has 511 places, 833 transitions, 14593 flow. Second operand 10 states and 192 transitions. [2024-06-04 15:24:49,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 858 transitions, 17528 flow [2024-06-04 15:24:58,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 858 transitions, 16776 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-04 15:24:58,484 INFO L231 Difference]: Finished difference. Result has 514 places, 837 transitions, 14713 flow [2024-06-04 15:24:58,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13847, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14713, PETRI_PLACES=514, PETRI_TRANSITIONS=837} [2024-06-04 15:24:58,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 470 predicate places. [2024-06-04 15:24:58,484 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 837 transitions, 14713 flow [2024-06-04 15:24:58,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:58,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:24:58,485 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] [2024-06-04 15:24:58,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 15:24:58,485 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:24:58,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:24:58,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2141103150, now seen corresponding path program 17 times [2024-06-04 15:24:58,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:24:58,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715762927] [2024-06-04 15:24:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:24:58,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:24:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:24:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:24:59,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:24:59,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715762927] [2024-06-04 15:24:59,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715762927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:24:59,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:24:59,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:24:59,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101832139] [2024-06-04 15:24:59,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:24:59,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:24:59,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:24:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:24:59,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:24:59,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-04 15:24:59,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 837 transitions, 14713 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:24:59,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:24:59,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-04 15:24:59,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:25:02,113 INFO L124 PetriNetUnfolderBase]: 4641/7322 cut-off events. [2024-06-04 15:25:02,113 INFO L125 PetriNetUnfolderBase]: For 2064082/2064084 co-relation queries the response was YES. [2024-06-04 15:25:02,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91126 conditions, 7322 events. 4641/7322 cut-off events. For 2064082/2064084 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45578 event pairs, 868 based on Foata normal form. 5/7321 useless extension candidates. Maximal degree in co-relation 90891. Up to 4849 conditions per place. [2024-06-04 15:25:02,259 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 508 selfloop transitions, 345 changer transitions 0/858 dead transitions. [2024-06-04 15:25:02,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 858 transitions, 17451 flow [2024-06-04 15:25:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:25:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:25:02,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 15:25:02,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-04 15:25:02,260 INFO L175 Difference]: Start difference. First operand has 514 places, 837 transitions, 14713 flow. Second operand 10 states and 191 transitions. [2024-06-04 15:25:02,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 858 transitions, 17451 flow