./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix032.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix032.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix032.oepc.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-7724a2d-m [2024-06-27 20:16:37,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:16:37,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:16:37,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:16:37,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:16:37,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:16:37,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:16:37,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:16:37,429 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:16:37,444 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:16:37,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:16:37,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:16:37,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:16:37,446 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:16:37,446 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:16:37,446 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:16:37,446 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:16:37,446 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:16:37,447 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:16:37,447 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:16:37,447 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:16:37,447 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:16:37,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:16:37,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:16:37,448 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:16:37,448 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:16:37,448 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:16:37,448 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:16:37,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:16:37,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:16:37,449 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:16:37,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:16:37,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:16:37,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:16:37,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:16:37,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:16:37,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:16:37,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:16:37,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:16:37,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:16:37,450 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:16:37,452 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:16:37,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:16:37,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:16:37,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:16:37,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:16:37,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:16:37,691 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:16:37,692 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:16:37,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix032.oepc.yml/witness.yml [2024-06-27 20:16:37,881 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:16:37,882 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:16:37,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-27 20:16:38,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:16:39,127 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:16:39,128 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.oepc.i [2024-06-27 20:16:39,140 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7451a6d8c/efda145d30a348b4b92b7b14bec44400/FLAG9e1327694 [2024-06-27 20:16:39,149 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7451a6d8c/efda145d30a348b4b92b7b14bec44400 [2024-06-27 20:16:39,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:16:39,151 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:16:39,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:16:39,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:16:39,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:16:39,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:16:37" (1/2) ... [2024-06-27 20:16:39,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d08980 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:16:39, skipping insertion in model container [2024-06-27 20:16:39,157 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:16:37" (1/2) ... [2024-06-27 20:16:39,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58fa7676 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:16:39, skipping insertion in model container [2024-06-27 20:16:39,158 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:16:39" (2/2) ... [2024-06-27 20:16:39,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d08980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39, skipping insertion in model container [2024-06-27 20:16:39,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:16:39" (2/2) ... [2024-06-27 20:16:39,159 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:16:39,263 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:16:39,264 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:16:39,264 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:16:39,264 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:16:39,264 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:16:39,264 INFO L106 edCorrectnessWitness]: ghost_update [L856-L856] multithreaded = 1; [2024-06-27 20:16:39,302 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:16:39,646 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:16:39,656 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:16:39,755 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:16:39,788 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:16:39,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39 WrapperNode [2024-06-27 20:16:39,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:16:39,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:16:39,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:16:39,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:16:39,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,862 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-27 20:16:39,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:16:39,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:16:39,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:16:39,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:16:39,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,898 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,911 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]. [2024-06-27 20:16:39,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,917 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,924 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,936 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:16:39,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:16:39,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:16:39,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:16:39,950 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (1/1) ... [2024-06-27 20:16:39,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:16:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:16:39,980 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) [2024-06-27 20:16:39,999 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 [2024-06-27 20:16:40,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:16:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:16:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:16:40,015 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:16:40,015 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:16:40,015 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:16:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:16:40,016 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:16:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:16:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:16:40,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:16:40,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:16:40,018 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:16:40,156 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:16:40,157 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:16:40,436 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:16:40,437 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:16:40,569 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:16:40,569 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:16:40,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:16:40 BoogieIcfgContainer [2024-06-27 20:16:40,571 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:16:40,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:16:40,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:16:40,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:16:40,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:16:37" (1/4) ... [2024-06-27 20:16:40,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318292d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:16:40, skipping insertion in model container [2024-06-27 20:16:40,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:16:39" (2/4) ... [2024-06-27 20:16:40,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318292d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:16:40, skipping insertion in model container [2024-06-27 20:16:40,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:16:39" (3/4) ... [2024-06-27 20:16:40,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318292d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:16:40, skipping insertion in model container [2024-06-27 20:16:40,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:16:40" (4/4) ... [2024-06-27 20:16:40,579 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.oepc.i [2024-06-27 20:16:40,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:16:40,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:16:40,592 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:16:40,631 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:16:40,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:16:40,718 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 20:16:40,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:16:40,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:16:40,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 20:16:40,723 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 20:16:40,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:16:40,739 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;@35f77916, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:16:40,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:16:40,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:16:40,743 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:16:40,743 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:16:40,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:40,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:16:40,744 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)] === [2024-06-27 20:16:40,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash 385894303, now seen corresponding path program 1 times [2024-06-27 20:16:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376023238] [2024-06-27 20:16:40,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:41,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:41,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376023238] [2024-06-27 20:16:41,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376023238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:16:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667909] [2024-06-27 20:16:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:41,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:16:41,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:16:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:16:41,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:16:41,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:41,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:41,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:16:41,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:42,166 INFO L124 PetriNetUnfolderBase]: 1566/2436 cut-off events. [2024-06-27 20:16:42,167 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:16:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4847 conditions, 2436 events. 1566/2436 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12309 event pairs, 1097 based on Foata normal form. 1/2362 useless extension candidates. Maximal degree in co-relation 4835. Up to 2326 conditions per place. [2024-06-27 20:16:42,183 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:16:42,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 179 flow [2024-06-27 20:16:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:16:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:16:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 20:16:42,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-06-27 20:16:42,195 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 82 transitions. [2024-06-27 20:16:42,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 179 flow [2024-06-27 20:16:42,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:42,201 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 20:16:42,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:16:42,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 20:16:42,206 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 20:16:42,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:42,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:42,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:42,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:16:42,207 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)] === [2024-06-27 20:16:42,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1477883188, now seen corresponding path program 1 times [2024-06-27 20:16:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:42,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806697701] [2024-06-27 20:16:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:42,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806697701] [2024-06-27 20:16:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806697701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:42,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:16:42,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405344904] [2024-06-27 20:16:42,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:42,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:16:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:16:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:16:42,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 20:16:42,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:42,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:42,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 20:16:42,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:43,105 INFO L124 PetriNetUnfolderBase]: 1560/2433 cut-off events. [2024-06-27 20:16:43,105 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-06-27 20:16:43,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5449 conditions, 2433 events. 1560/2433 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12315 event pairs, 930 based on Foata normal form. 3/2397 useless extension candidates. Maximal degree in co-relation 5437. Up to 2302 conditions per place. [2024-06-27 20:16:43,117 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 20:16:43,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-27 20:16:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:16:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:16:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-27 20:16:43,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-27 20:16:43,119 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-27 20:16:43,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-27 20:16:43,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:16:43,121 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 20:16:43,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 20:16:43,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 20:16:43,122 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 20:16:43,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:43,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:43,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:43,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:16:43,123 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)] === [2024-06-27 20:16:43,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1388389293, now seen corresponding path program 1 times [2024-06-27 20:16:43,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:43,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767839482] [2024-06-27 20:16:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767839482] [2024-06-27 20:16:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767839482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:43,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:16:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5361135] [2024-06-27 20:16:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:16:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:16:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:16:44,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:16:44,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 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) [2024-06-27 20:16:44,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:44,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:16:44,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:44,442 INFO L124 PetriNetUnfolderBase]: 1893/2922 cut-off events. [2024-06-27 20:16:44,442 INFO L125 PetriNetUnfolderBase]: For 1525/1525 co-relation queries the response was YES. [2024-06-27 20:16:44,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7209 conditions, 2922 events. 1893/2922 cut-off events. For 1525/1525 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14776 event pairs, 878 based on Foata normal form. 3/2877 useless extension candidates. Maximal degree in co-relation 7195. Up to 2753 conditions per place. [2024-06-27 20:16:44,457 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-27 20:16:44,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 380 flow [2024-06-27 20:16:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 20:16:44,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-27 20:16:44,461 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 149 transitions. [2024-06-27 20:16:44,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 380 flow [2024-06-27 20:16:44,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:16:44,463 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-27 20:16:44,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 20:16:44,464 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-27 20:16:44,464 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-27 20:16:44,465 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) [2024-06-27 20:16:44,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:44,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:44,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:16:44,465 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)] === [2024-06-27 20:16:44,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -946889695, now seen corresponding path program 1 times [2024-06-27 20:16:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664407644] [2024-06-27 20:16:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:44,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:45,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664407644] [2024-06-27 20:16:45,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664407644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:45,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:45,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:45,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384721507] [2024-06-27 20:16:45,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:45,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:45,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 20:16:45,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:45,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:45,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 20:16:45,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:46,073 INFO L124 PetriNetUnfolderBase]: 1884/2903 cut-off events. [2024-06-27 20:16:46,074 INFO L125 PetriNetUnfolderBase]: For 3016/3016 co-relation queries the response was YES. [2024-06-27 20:16:46,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7974 conditions, 2903 events. 1884/2903 cut-off events. For 3016/3016 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14621 event pairs, 690 based on Foata normal form. 6/2859 useless extension candidates. Maximal degree in co-relation 7958. Up to 2708 conditions per place. [2024-06-27 20:16:46,089 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-06-27 20:16:46,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 440 flow [2024-06-27 20:16:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 20:16:46,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-27 20:16:46,091 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 7 states and 168 transitions. [2024-06-27 20:16:46,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 440 flow [2024-06-27 20:16:46,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 412 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:46,095 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 221 flow [2024-06-27 20:16:46,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 20:16:46,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-27 20:16:46,096 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 221 flow [2024-06-27 20:16:46,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:46,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:16:46,097 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)] === [2024-06-27 20:16:46,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1725653254, now seen corresponding path program 1 times [2024-06-27 20:16:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794817247] [2024-06-27 20:16:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:46,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:46,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794817247] [2024-06-27 20:16:46,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794817247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:46,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:46,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:16:46,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205622336] [2024-06-27 20:16:46,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:46,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:16:46,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:46,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:16:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:16:46,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:46,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:46,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:46,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:46,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:47,240 INFO L124 PetriNetUnfolderBase]: 1879/2896 cut-off events. [2024-06-27 20:16:47,241 INFO L125 PetriNetUnfolderBase]: For 4612/4612 co-relation queries the response was YES. [2024-06-27 20:16:47,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 2896 events. 1879/2896 cut-off events. For 4612/4612 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14550 event pairs, 812 based on Foata normal form. 2/2848 useless extension candidates. Maximal degree in co-relation 8434. Up to 2767 conditions per place. [2024-06-27 20:16:47,260 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 48 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-27 20:16:47,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 377 flow [2024-06-27 20:16:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:16:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:16:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-27 20:16:47,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-27 20:16:47,262 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 221 flow. Second operand 5 states and 102 transitions. [2024-06-27 20:16:47,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 377 flow [2024-06-27 20:16:47,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 338 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:47,270 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 228 flow [2024-06-27 20:16:47,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 20:16:47,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-27 20:16:47,273 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 228 flow [2024-06-27 20:16:47,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:47,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:47,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:47,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:16:47,277 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)] === [2024-06-27 20:16:47,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1955641704, now seen corresponding path program 1 times [2024-06-27 20:16:47,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:47,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099445380] [2024-06-27 20:16:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:47,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:47,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099445380] [2024-06-27 20:16:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099445380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:47,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901718058] [2024-06-27 20:16:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:47,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:16:47,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:47,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:47,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:16:47,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:48,617 INFO L124 PetriNetUnfolderBase]: 2215/3407 cut-off events. [2024-06-27 20:16:48,617 INFO L125 PetriNetUnfolderBase]: For 7255/7255 co-relation queries the response was YES. [2024-06-27 20:16:48,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10468 conditions, 3407 events. 2215/3407 cut-off events. For 7255/7255 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17101 event pairs, 972 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 10448. Up to 3242 conditions per place. [2024-06-27 20:16:48,647 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-27 20:16:48,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 414 flow [2024-06-27 20:16:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:16:48,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-27 20:16:48,649 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 228 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:16:48,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 414 flow [2024-06-27 20:16:48,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 392 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:48,654 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 262 flow [2024-06-27 20:16:48,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 20:16:48,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-27 20:16:48,657 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 262 flow [2024-06-27 20:16:48,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:48,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:48,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:16:48,658 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)] === [2024-06-27 20:16:48,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash 695777733, now seen corresponding path program 1 times [2024-06-27 20:16:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:48,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017196418] [2024-06-27 20:16:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:48,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:49,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:49,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017196418] [2024-06-27 20:16:49,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017196418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:49,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:49,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:49,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043442358] [2024-06-27 20:16:49,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:49,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:49,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:49,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:49,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:49,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:49,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:49,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:49,890 INFO L124 PetriNetUnfolderBase]: 2094/3286 cut-off events. [2024-06-27 20:16:49,890 INFO L125 PetriNetUnfolderBase]: For 9895/9901 co-relation queries the response was YES. [2024-06-27 20:16:49,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10816 conditions, 3286 events. 2094/3286 cut-off events. For 9895/9901 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17014 event pairs, 875 based on Foata normal form. 6/3280 useless extension candidates. Maximal degree in co-relation 10795. Up to 3040 conditions per place. [2024-06-27 20:16:49,911 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 57 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-27 20:16:49,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 526 flow [2024-06-27 20:16:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 20:16:49,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-27 20:16:49,912 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 262 flow. Second operand 6 states and 127 transitions. [2024-06-27 20:16:49,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 526 flow [2024-06-27 20:16:49,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 494 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:16:49,917 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 320 flow [2024-06-27 20:16:49,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-27 20:16:49,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-27 20:16:49,918 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 320 flow [2024-06-27 20:16:49,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:49,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:49,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:49,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:16:49,918 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)] === [2024-06-27 20:16:49,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash -218256661, now seen corresponding path program 2 times [2024-06-27 20:16:49,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:49,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311629674] [2024-06-27 20:16:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:49,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311629674] [2024-06-27 20:16:50,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311629674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:50,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:16:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856768365] [2024-06-27 20:16:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:50,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:16:50,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:16:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:16:50,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:50,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:50,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:50,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:50,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:51,109 INFO L124 PetriNetUnfolderBase]: 2089/3278 cut-off events. [2024-06-27 20:16:51,109 INFO L125 PetriNetUnfolderBase]: For 12801/12801 co-relation queries the response was YES. [2024-06-27 20:16:51,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11508 conditions, 3278 events. 2089/3278 cut-off events. For 12801/12801 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16961 event pairs, 871 based on Foata normal form. 2/3269 useless extension candidates. Maximal degree in co-relation 11486. Up to 3059 conditions per place. [2024-06-27 20:16:51,125 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 57 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 20:16:51,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 494 flow [2024-06-27 20:16:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:16:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:16:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:16:51,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:16:51,129 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 320 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:16:51,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 494 flow [2024-06-27 20:16:51,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 456 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 20:16:51,135 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 312 flow [2024-06-27 20:16:51,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-27 20:16:51,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-27 20:16:51,136 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 312 flow [2024-06-27 20:16:51,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:51,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:51,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:51,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:16:51,137 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:51,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:51,137 INFO L85 PathProgramCache]: Analyzing trace with hash -495349031, now seen corresponding path program 1 times [2024-06-27 20:16:51,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:51,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726176755] [2024-06-27 20:16:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:51,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726176755] [2024-06-27 20:16:51,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726176755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:51,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:51,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167112047] [2024-06-27 20:16:51,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:51,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:16:51,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:16:51,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:51,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:16:51,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:52,769 INFO L124 PetriNetUnfolderBase]: 2211/3382 cut-off events. [2024-06-27 20:16:52,770 INFO L125 PetriNetUnfolderBase]: For 14788/14788 co-relation queries the response was YES. [2024-06-27 20:16:52,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12025 conditions, 3382 events. 2211/3382 cut-off events. For 14788/14788 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16879 event pairs, 909 based on Foata normal form. 4/3373 useless extension candidates. Maximal degree in co-relation 12001. Up to 3219 conditions per place. [2024-06-27 20:16:52,787 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-27 20:16:52,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 83 transitions, 544 flow [2024-06-27 20:16:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:16:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:16:52,789 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 312 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:16:52,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 83 transitions, 544 flow [2024-06-27 20:16:52,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 510 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:16:52,796 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 346 flow [2024-06-27 20:16:52,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 20:16:52,797 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-27 20:16:52,797 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 346 flow [2024-06-27 20:16:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:16:52,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:52,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:52,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:16:52,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:52,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 588551723, now seen corresponding path program 1 times [2024-06-27 20:16:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:52,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281390296] [2024-06-27 20:16:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:53,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:53,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281390296] [2024-06-27 20:16:53,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281390296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:53,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:53,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:53,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244113678] [2024-06-27 20:16:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:53,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:53,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:53,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:53,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:53,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:53,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:53,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:54,266 INFO L124 PetriNetUnfolderBase]: 2090/3265 cut-off events. [2024-06-27 20:16:54,267 INFO L125 PetriNetUnfolderBase]: For 18151/18151 co-relation queries the response was YES. [2024-06-27 20:16:54,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 3265 events. 2090/3265 cut-off events. For 18151/18151 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16827 event pairs, 826 based on Foata normal form. 2/3253 useless extension candidates. Maximal degree in co-relation 12324. Up to 3040 conditions per place. [2024-06-27 20:16:54,283 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-27 20:16:54,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 606 flow [2024-06-27 20:16:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:16:54,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-27 20:16:54,284 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 346 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:16:54,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 606 flow [2024-06-27 20:16:54,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 562 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:54,291 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 372 flow [2024-06-27 20:16:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-27 20:16:54,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-27 20:16:54,293 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 372 flow [2024-06-27 20:16:54,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:54,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:16:54,293 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)] === [2024-06-27 20:16:54,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1646673119, now seen corresponding path program 2 times [2024-06-27 20:16:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250967371] [2024-06-27 20:16:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:55,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250967371] [2024-06-27 20:16:55,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250967371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:55,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:55,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:55,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4803706] [2024-06-27 20:16:55,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:55,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:55,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:55,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:55,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:55,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:55,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:55,587 INFO L124 PetriNetUnfolderBase]: 2101/3282 cut-off events. [2024-06-27 20:16:55,588 INFO L125 PetriNetUnfolderBase]: For 22110/22116 co-relation queries the response was YES. [2024-06-27 20:16:55,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13091 conditions, 3282 events. 2101/3282 cut-off events. For 22110/22116 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16864 event pairs, 830 based on Foata normal form. 6/3273 useless extension candidates. Maximal degree in co-relation 13066. Up to 3009 conditions per place. [2024-06-27 20:16:55,608 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 63 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-27 20:16:55,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 718 flow [2024-06-27 20:16:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 20:16:55,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:16:55,610 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 372 flow. Second operand 7 states and 147 transitions. [2024-06-27 20:16:55,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 718 flow [2024-06-27 20:16:55,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 672 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:55,623 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 460 flow [2024-06-27 20:16:55,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=460, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-27 20:16:55,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-27 20:16:55,624 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 460 flow [2024-06-27 20:16:55,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:55,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:55,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:55,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:16:55,625 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)] === [2024-06-27 20:16:55,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash 588671879, now seen corresponding path program 1 times [2024-06-27 20:16:55,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:55,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6235870] [2024-06-27 20:16:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:56,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:56,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6235870] [2024-06-27 20:16:56,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6235870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:56,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:56,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:56,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900101329] [2024-06-27 20:16:56,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:56,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:56,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:56,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:16:56,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 460 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:16:56,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:56,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:16:56,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:56,941 INFO L124 PetriNetUnfolderBase]: 2244/3459 cut-off events. [2024-06-27 20:16:56,941 INFO L125 PetriNetUnfolderBase]: For 26442/26448 co-relation queries the response was YES. [2024-06-27 20:16:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14356 conditions, 3459 events. 2244/3459 cut-off events. For 26442/26448 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17438 event pairs, 893 based on Foata normal form. 3/3446 useless extension candidates. Maximal degree in co-relation 14330. Up to 3227 conditions per place. [2024-06-27 20:16:56,957 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 23 changer transitions 0/102 dead transitions. [2024-06-27 20:16:56,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 102 transitions, 818 flow [2024-06-27 20:16:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 20:16:56,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 20:16:56,958 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 460 flow. Second operand 7 states and 141 transitions. [2024-06-27 20:16:56,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 102 transitions, 818 flow [2024-06-27 20:16:56,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 774 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:56,971 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 536 flow [2024-06-27 20:16:56,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-27 20:16:56,972 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-27 20:16:56,972 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 536 flow [2024-06-27 20:16:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:16:56,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:56,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:56,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:16:56,973 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:16:56,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1319988821, now seen corresponding path program 2 times [2024-06-27 20:16:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853564888] [2024-06-27 20:16:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:56,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:57,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853564888] [2024-06-27 20:16:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853564888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:57,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:57,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:57,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581094309] [2024-06-27 20:16:57,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:57,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:57,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:57,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:16:57,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:16:57,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:57,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:16:57,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:58,327 INFO L124 PetriNetUnfolderBase]: 2255/3474 cut-off events. [2024-06-27 20:16:58,328 INFO L125 PetriNetUnfolderBase]: For 30998/30998 co-relation queries the response was YES. [2024-06-27 20:16:58,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15175 conditions, 3474 events. 2255/3474 cut-off events. For 30998/30998 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17567 event pairs, 885 based on Foata normal form. 2/3461 useless extension candidates. Maximal degree in co-relation 15147. Up to 3292 conditions per place. [2024-06-27 20:16:58,341 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 81 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-27 20:16:58,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 810 flow [2024-06-27 20:16:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:16:58,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:16:58,343 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 536 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:16:58,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 810 flow [2024-06-27 20:16:58,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 772 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 20:16:58,358 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 576 flow [2024-06-27 20:16:58,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=576, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-27 20:16:58,359 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-27 20:16:58,359 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 576 flow [2024-06-27 20:16:58,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:16:58,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:58,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:58,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:16:58,360 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)] === [2024-06-27 20:16:58,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1823804639, now seen corresponding path program 3 times [2024-06-27 20:16:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619007263] [2024-06-27 20:16:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:16:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:16:59,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:16:59,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619007263] [2024-06-27 20:16:59,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619007263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:16:59,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:16:59,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:16:59,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656508537] [2024-06-27 20:16:59,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:16:59,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:16:59,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:16:59,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:16:59,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:16:59,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:16:59,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 576 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:59,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:16:59,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:16:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:16:59,802 INFO L124 PetriNetUnfolderBase]: 2125/3342 cut-off events. [2024-06-27 20:16:59,803 INFO L125 PetriNetUnfolderBase]: For 34672/34672 co-relation queries the response was YES. [2024-06-27 20:16:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14946 conditions, 3342 events. 2125/3342 cut-off events. For 34672/34672 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17335 event pairs, 820 based on Foata normal form. 2/3329 useless extension candidates. Maximal degree in co-relation 14916. Up to 3088 conditions per place. [2024-06-27 20:16:59,821 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-27 20:16:59,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 100 transitions, 804 flow [2024-06-27 20:16:59,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:16:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:16:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:16:59,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:16:59,822 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 576 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:16:59,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 100 transitions, 804 flow [2024-06-27 20:16:59,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 736 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:16:59,844 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 544 flow [2024-06-27 20:16:59,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2024-06-27 20:16:59,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-27 20:16:59,845 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 544 flow [2024-06-27 20:16:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:16:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:16:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:16:59,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:16:59,845 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)] === [2024-06-27 20:16:59,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:16:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1823804825, now seen corresponding path program 3 times [2024-06-27 20:16:59,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:16:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612217355] [2024-06-27 20:16:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:16:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:16:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:00,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:00,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612217355] [2024-06-27 20:17:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612217355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:00,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:00,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:17:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910825189] [2024-06-27 20:17:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:17:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:17:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:17:00,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:00,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:17:00,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:00,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:00,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:01,115 INFO L124 PetriNetUnfolderBase]: 2245/3460 cut-off events. [2024-06-27 20:17:01,115 INFO L125 PetriNetUnfolderBase]: For 38416/38416 co-relation queries the response was YES. [2024-06-27 20:17:01,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15677 conditions, 3460 events. 2245/3460 cut-off events. For 38416/38416 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17463 event pairs, 885 based on Foata normal form. 2/3447 useless extension candidates. Maximal degree in co-relation 15646. Up to 3260 conditions per place. [2024-06-27 20:17:01,133 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 19 changer transitions 0/100 dead transitions. [2024-06-27 20:17:01,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 782 flow [2024-06-27 20:17:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:17:01,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:17:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:17:01,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 20:17:01,135 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 544 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:17:01,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 782 flow [2024-06-27 20:17:01,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 100 transitions, 722 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:01,159 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 530 flow [2024-06-27 20:17:01,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-06-27 20:17:01,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-06-27 20:17:01,160 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 530 flow [2024-06-27 20:17:01,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:17:01,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:01,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:01,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:17:01,161 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:01,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash 752899345, now seen corresponding path program 1 times [2024-06-27 20:17:01,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:01,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401900285] [2024-06-27 20:17:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:01,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:01,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401900285] [2024-06-27 20:17:01,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401900285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:01,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:01,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:17:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943438439] [2024-06-27 20:17:01,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:01,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:17:01,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:17:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:17:01,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:01,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 530 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:01,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:01,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:01,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:02,295 INFO L124 PetriNetUnfolderBase]: 2285/3634 cut-off events. [2024-06-27 20:17:02,295 INFO L125 PetriNetUnfolderBase]: For 48108/48108 co-relation queries the response was YES. [2024-06-27 20:17:02,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16765 conditions, 3634 events. 2285/3634 cut-off events. For 48108/48108 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19057 event pairs, 997 based on Foata normal form. 1/3633 useless extension candidates. Maximal degree in co-relation 16733. Up to 3360 conditions per place. [2024-06-27 20:17:02,313 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 68 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-06-27 20:17:02,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 724 flow [2024-06-27 20:17:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:17:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:17:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 20:17:02,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 20:17:02,314 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 530 flow. Second operand 5 states and 98 transitions. [2024-06-27 20:17:02,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 724 flow [2024-06-27 20:17:02,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 92 transitions, 662 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:02,333 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 518 flow [2024-06-27 20:17:02,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-27 20:17:02,333 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-27 20:17:02,333 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 518 flow [2024-06-27 20:17:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:02,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:02,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:02,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:17:02,334 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:02,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:02,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1065145482, now seen corresponding path program 1 times [2024-06-27 20:17:02,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:02,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524228583] [2024-06-27 20:17:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:02,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:03,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524228583] [2024-06-27 20:17:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524228583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:03,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:03,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406108235] [2024-06-27 20:17:03,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:03,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:03,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 518 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:03,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:03,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:03,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:04,121 INFO L124 PetriNetUnfolderBase]: 2128/3346 cut-off events. [2024-06-27 20:17:04,121 INFO L125 PetriNetUnfolderBase]: For 47062/47062 co-relation queries the response was YES. [2024-06-27 20:17:04,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16070 conditions, 3346 events. 2128/3346 cut-off events. For 47062/47062 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17288 event pairs, 798 based on Foata normal form. 2/3346 useless extension candidates. Maximal degree in co-relation 16037. Up to 3054 conditions per place. [2024-06-27 20:17:04,137 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-06-27 20:17:04,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 874 flow [2024-06-27 20:17:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:17:04,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 20:17:04,138 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 518 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:17:04,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 874 flow [2024-06-27 20:17:04,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 846 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:04,156 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 583 flow [2024-06-27 20:17:04,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=583, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 20:17:04,157 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-27 20:17:04,157 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 583 flow [2024-06-27 20:17:04,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:04,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:04,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:04,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:17:04,157 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:04,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1065235847, now seen corresponding path program 1 times [2024-06-27 20:17:04,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:04,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356474815] [2024-06-27 20:17:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:04,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356474815] [2024-06-27 20:17:05,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356474815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:05,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:05,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:05,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554133723] [2024-06-27 20:17:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:05,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:05,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:05,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 583 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:05,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:05,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:05,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:05,783 INFO L124 PetriNetUnfolderBase]: 2264/3486 cut-off events. [2024-06-27 20:17:05,784 INFO L125 PetriNetUnfolderBase]: For 53240/53240 co-relation queries the response was YES. [2024-06-27 20:17:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17431 conditions, 3486 events. 2264/3486 cut-off events. For 53240/53240 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17468 event pairs, 842 based on Foata normal form. 2/3486 useless extension candidates. Maximal degree in co-relation 17397. Up to 3285 conditions per place. [2024-06-27 20:17:05,800 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 97 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2024-06-27 20:17:05,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 925 flow [2024-06-27 20:17:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:17:05,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:17:05,801 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 583 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:17:05,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 925 flow [2024-06-27 20:17:05,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 119 transitions, 858 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:05,821 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 604 flow [2024-06-27 20:17:05,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=604, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2024-06-27 20:17:05,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-27 20:17:05,822 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 604 flow [2024-06-27 20:17:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:05,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:05,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:05,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:17:05,823 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:05,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1068954917, now seen corresponding path program 2 times [2024-06-27 20:17:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269446217] [2024-06-27 20:17:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:06,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269446217] [2024-06-27 20:17:06,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269446217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:06,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:06,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:06,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644134964] [2024-06-27 20:17:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:06,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:06,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:06,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:06,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:06,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:06,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:06,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:07,255 INFO L124 PetriNetUnfolderBase]: 2291/3526 cut-off events. [2024-06-27 20:17:07,255 INFO L125 PetriNetUnfolderBase]: For 60456/60459 co-relation queries the response was YES. [2024-06-27 20:17:07,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18352 conditions, 3526 events. 2291/3526 cut-off events. For 60456/60459 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17687 event pairs, 850 based on Foata normal form. 2/3525 useless extension candidates. Maximal degree in co-relation 18317. Up to 3202 conditions per place. [2024-06-27 20:17:07,275 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 81 selfloop transitions, 43 changer transitions 0/129 dead transitions. [2024-06-27 20:17:07,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1204 flow [2024-06-27 20:17:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:17:07,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:07,276 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 604 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:17:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1204 flow [2024-06-27 20:17:07,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1140 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:07,305 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 778 flow [2024-06-27 20:17:07,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=778, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-27 20:17:07,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-27 20:17:07,306 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 778 flow [2024-06-27 20:17:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:07,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:07,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:17:07,307 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:07,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1068954762, now seen corresponding path program 2 times [2024-06-27 20:17:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:07,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776622134] [2024-06-27 20:17:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:08,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776622134] [2024-06-27 20:17:08,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776622134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:08,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:08,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256814126] [2024-06-27 20:17:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:08,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:08,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:08,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 778 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:08,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:08,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:08,864 INFO L124 PetriNetUnfolderBase]: 2184/3424 cut-off events. [2024-06-27 20:17:08,864 INFO L125 PetriNetUnfolderBase]: For 67742/67745 co-relation queries the response was YES. [2024-06-27 20:17:08,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18514 conditions, 3424 events. 2184/3424 cut-off events. For 67742/67745 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17668 event pairs, 796 based on Foata normal form. 4/3425 useless extension candidates. Maximal degree in co-relation 18478. Up to 3088 conditions per place. [2024-06-27 20:17:08,881 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 85 selfloop transitions, 29 changer transitions 0/128 dead transitions. [2024-06-27 20:17:08,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 128 transitions, 1120 flow [2024-06-27 20:17:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:17:08,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 20:17:08,882 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 778 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:17:08,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 128 transitions, 1120 flow [2024-06-27 20:17:08,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 1052 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:08,913 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 830 flow [2024-06-27 20:17:08,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-27 20:17:08,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-27 20:17:08,913 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 830 flow [2024-06-27 20:17:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:08,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:08,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:08,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:17:08,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:08,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1068960497, now seen corresponding path program 3 times [2024-06-27 20:17:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:08,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647979656] [2024-06-27 20:17:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:09,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:09,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647979656] [2024-06-27 20:17:09,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647979656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:09,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:09,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:09,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069122635] [2024-06-27 20:17:09,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:09,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:09,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:09,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:09,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 830 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:09,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:09,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:09,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:10,355 INFO L124 PetriNetUnfolderBase]: 2297/3535 cut-off events. [2024-06-27 20:17:10,355 INFO L125 PetriNetUnfolderBase]: For 75091/75094 co-relation queries the response was YES. [2024-06-27 20:17:10,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19849 conditions, 3535 events. 2297/3535 cut-off events. For 75091/75094 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17732 event pairs, 850 based on Foata normal form. 2/3534 useless extension candidates. Maximal degree in co-relation 19811. Up to 3213 conditions per place. [2024-06-27 20:17:10,375 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 81 selfloop transitions, 44 changer transitions 0/130 dead transitions. [2024-06-27 20:17:10,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1228 flow [2024-06-27 20:17:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:10,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:17:10,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 20:17:10,376 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 830 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:17:10,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1228 flow [2024-06-27 20:17:10,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1102 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:10,420 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 800 flow [2024-06-27 20:17:10,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-27 20:17:10,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-27 20:17:10,421 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 800 flow [2024-06-27 20:17:10,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:10,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:10,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:17:10,422 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)] === [2024-06-27 20:17:10,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 341141582, now seen corresponding path program 1 times [2024-06-27 20:17:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:10,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058793182] [2024-06-27 20:17:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058793182] [2024-06-27 20:17:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058793182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:11,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:11,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247509601] [2024-06-27 20:17:11,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:11,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:11,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 800 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:11,886 INFO L124 PetriNetUnfolderBase]: 2335/3593 cut-off events. [2024-06-27 20:17:11,886 INFO L125 PetriNetUnfolderBase]: For 82345/82348 co-relation queries the response was YES. [2024-06-27 20:17:11,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20438 conditions, 3593 events. 2335/3593 cut-off events. For 82345/82348 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18006 event pairs, 796 based on Foata normal form. 4/3594 useless extension candidates. Maximal degree in co-relation 20399. Up to 3297 conditions per place. [2024-06-27 20:17:11,905 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 104 selfloop transitions, 32 changer transitions 0/141 dead transitions. [2024-06-27 20:17:11,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1322 flow [2024-06-27 20:17:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:17:11,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 20:17:11,907 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 800 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:17:11,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1322 flow [2024-06-27 20:17:11,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 141 transitions, 1244 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:11,941 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 910 flow [2024-06-27 20:17:11,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-27 20:17:11,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-27 20:17:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 910 flow [2024-06-27 20:17:11,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:11,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:11,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:11,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:17:11,942 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:11,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2030018077, now seen corresponding path program 4 times [2024-06-27 20:17:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26416796] [2024-06-27 20:17:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:12,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26416796] [2024-06-27 20:17:12,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26416796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:12,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:12,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:12,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979250499] [2024-06-27 20:17:12,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:12,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:12,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:12,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:12,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:12,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:12,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:12,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:13,406 INFO L124 PetriNetUnfolderBase]: 2346/3603 cut-off events. [2024-06-27 20:17:13,406 INFO L125 PetriNetUnfolderBase]: For 90283/90283 co-relation queries the response was YES. [2024-06-27 20:17:13,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21411 conditions, 3603 events. 2346/3603 cut-off events. For 90283/90283 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18022 event pairs, 802 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 21370. Up to 3416 conditions per place. [2024-06-27 20:17:13,428 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 115 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-06-27 20:17:13,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 137 transitions, 1287 flow [2024-06-27 20:17:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:17:13,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-27 20:17:13,429 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 910 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:17:13,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 137 transitions, 1287 flow [2024-06-27 20:17:13,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 137 transitions, 1241 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:13,468 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 967 flow [2024-06-27 20:17:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=967, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-06-27 20:17:13,468 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-27 20:17:13,468 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 967 flow [2024-06-27 20:17:13,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:13,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:13,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:17:13,469 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:13,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:13,469 INFO L85 PathProgramCache]: Analyzing trace with hash 710994936, now seen corresponding path program 2 times [2024-06-27 20:17:13,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:13,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877962554] [2024-06-27 20:17:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:13,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:14,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:14,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877962554] [2024-06-27 20:17:14,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877962554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:14,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:14,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:14,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244761068] [2024-06-27 20:17:14,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:14,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:14,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:14,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:14,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:14,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:14,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:14,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:14,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:14,904 INFO L124 PetriNetUnfolderBase]: 2368/3640 cut-off events. [2024-06-27 20:17:14,904 INFO L125 PetriNetUnfolderBase]: For 98216/98216 co-relation queries the response was YES. [2024-06-27 20:17:14,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21904 conditions, 3640 events. 2368/3640 cut-off events. For 98216/98216 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18215 event pairs, 802 based on Foata normal form. 4/3642 useless extension candidates. Maximal degree in co-relation 21860. Up to 3439 conditions per place. [2024-06-27 20:17:14,927 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 119 selfloop transitions, 17 changer transitions 0/141 dead transitions. [2024-06-27 20:17:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 141 transitions, 1349 flow [2024-06-27 20:17:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:17:14,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 20:17:14,928 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 967 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:17:14,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 141 transitions, 1349 flow [2024-06-27 20:17:14,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1279 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:14,985 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 993 flow [2024-06-27 20:17:14,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=993, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2024-06-27 20:17:14,986 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-27 20:17:14,986 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 993 flow [2024-06-27 20:17:14,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:14,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:14,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:14,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:17:14,986 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)] === [2024-06-27 20:17:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash 703376159, now seen corresponding path program 5 times [2024-06-27 20:17:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:14,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376102172] [2024-06-27 20:17:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:14,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:15,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:15,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376102172] [2024-06-27 20:17:15,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376102172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:15,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:15,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:15,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20908451] [2024-06-27 20:17:15,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:15,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:15,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:15,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:15,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:15,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 993 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:15,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:15,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:15,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:16,435 INFO L124 PetriNetUnfolderBase]: 2379/3656 cut-off events. [2024-06-27 20:17:16,435 INFO L125 PetriNetUnfolderBase]: For 105081/105081 co-relation queries the response was YES. [2024-06-27 20:17:16,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22332 conditions, 3656 events. 2379/3656 cut-off events. For 105081/105081 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18352 event pairs, 802 based on Foata normal form. 2/3656 useless extension candidates. Maximal degree in co-relation 22287. Up to 3417 conditions per place. [2024-06-27 20:17:16,458 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 111 selfloop transitions, 29 changer transitions 0/145 dead transitions. [2024-06-27 20:17:16,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1490 flow [2024-06-27 20:17:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:17:16,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:17:16,459 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 993 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:17:16,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1490 flow [2024-06-27 20:17:16,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1418 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:16,512 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1048 flow [2024-06-27 20:17:16,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=108, PETRI_TRANSITIONS=120} [2024-06-27 20:17:16,513 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-27 20:17:16,513 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1048 flow [2024-06-27 20:17:16,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:16,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:16,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:16,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:17:16,513 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)] === [2024-06-27 20:17:16,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:16,514 INFO L85 PathProgramCache]: Analyzing trace with hash 710728026, now seen corresponding path program 3 times [2024-06-27 20:17:16,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:16,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413652611] [2024-06-27 20:17:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:16,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:17,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:17,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413652611] [2024-06-27 20:17:17,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413652611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:17,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:17,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701517488] [2024-06-27 20:17:17,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:17,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:17,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:17,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:17,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 120 transitions, 1048 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:17,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:17,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:17,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:17,988 INFO L124 PetriNetUnfolderBase]: 2401/3693 cut-off events. [2024-06-27 20:17:17,988 INFO L125 PetriNetUnfolderBase]: For 113210/113210 co-relation queries the response was YES. [2024-06-27 20:17:18,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22824 conditions, 3693 events. 2401/3693 cut-off events. For 113210/113210 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18588 event pairs, 802 based on Foata normal form. 4/3695 useless extension candidates. Maximal degree in co-relation 22779. Up to 3460 conditions per place. [2024-06-27 20:17:18,014 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 121 selfloop transitions, 22 changer transitions 0/148 dead transitions. [2024-06-27 20:17:18,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1454 flow [2024-06-27 20:17:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:17:18,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:17:18,015 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1048 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:17:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1454 flow [2024-06-27 20:17:18,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 148 transitions, 1308 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:18,081 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 1014 flow [2024-06-27 20:17:18,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1014, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-27 20:17:18,082 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-27 20:17:18,082 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 1014 flow [2024-06-27 20:17:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:18,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:18,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:18,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:17:18,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:18,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash 703376376, now seen corresponding path program 4 times [2024-06-27 20:17:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:18,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739819432] [2024-06-27 20:17:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:18,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:18,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739819432] [2024-06-27 20:17:18,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739819432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:18,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:18,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:18,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180335094] [2024-06-27 20:17:18,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:18,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:18,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:18,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:18,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 1014 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:18,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:18,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:18,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:19,491 INFO L124 PetriNetUnfolderBase]: 2391/3679 cut-off events. [2024-06-27 20:17:19,491 INFO L125 PetriNetUnfolderBase]: For 119050/119050 co-relation queries the response was YES. [2024-06-27 20:17:19,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22862 conditions, 3679 events. 2391/3679 cut-off events. For 119050/119050 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18485 event pairs, 800 based on Foata normal form. 4/3681 useless extension candidates. Maximal degree in co-relation 22816. Up to 3410 conditions per place. [2024-06-27 20:17:19,514 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 114 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-27 20:17:19,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1366 flow [2024-06-27 20:17:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:17:19,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 20:17:19,515 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 1014 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:17:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1366 flow [2024-06-27 20:17:19,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1262 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:19,592 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 976 flow [2024-06-27 20:17:19,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=976, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-27 20:17:19,593 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-27 20:17:19,593 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 976 flow [2024-06-27 20:17:19,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:19,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:19,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:19,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:17:19,594 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:19,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash 703370579, now seen corresponding path program 6 times [2024-06-27 20:17:19,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624035640] [2024-06-27 20:17:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:20,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:20,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624035640] [2024-06-27 20:17:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624035640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:20,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:20,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:20,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556559495] [2024-06-27 20:17:20,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:20,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:20,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:20,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:20,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:20,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 976 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:20,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:20,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:20,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:21,014 INFO L124 PetriNetUnfolderBase]: 2386/3672 cut-off events. [2024-06-27 20:17:21,014 INFO L125 PetriNetUnfolderBase]: For 124533/124533 co-relation queries the response was YES. [2024-06-27 20:17:21,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22978 conditions, 3672 events. 2386/3672 cut-off events. For 124533/124533 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18462 event pairs, 800 based on Foata normal form. 2/3672 useless extension candidates. Maximal degree in co-relation 22931. Up to 3430 conditions per place. [2024-06-27 20:17:21,037 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 111 selfloop transitions, 30 changer transitions 0/146 dead transitions. [2024-06-27 20:17:21,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 146 transitions, 1316 flow [2024-06-27 20:17:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:17:21,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:17:21,038 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 976 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:17:21,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 146 transitions, 1316 flow [2024-06-27 20:17:21,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 146 transitions, 1178 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:21,088 INFO L231 Difference]: Finished difference. Result has 112 places, 123 transitions, 906 flow [2024-06-27 20:17:21,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=906, PETRI_PLACES=112, PETRI_TRANSITIONS=123} [2024-06-27 20:17:21,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-27 20:17:21,088 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 123 transitions, 906 flow [2024-06-27 20:17:21,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:21,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:21,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:17:21,089 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:21,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:21,090 INFO L85 PathProgramCache]: Analyzing trace with hash 703370424, now seen corresponding path program 3 times [2024-06-27 20:17:21,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:21,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808246466] [2024-06-27 20:17:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:21,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:21,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808246466] [2024-06-27 20:17:21,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808246466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:21,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:21,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:17:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999372050] [2024-06-27 20:17:21,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:21,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:17:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:21,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:17:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:17:22,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:22,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 123 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:22,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:22,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:22,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:22,653 INFO L124 PetriNetUnfolderBase]: 2255/3539 cut-off events. [2024-06-27 20:17:22,653 INFO L125 PetriNetUnfolderBase]: For 130783/130783 co-relation queries the response was YES. [2024-06-27 20:17:22,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22310 conditions, 3539 events. 2255/3539 cut-off events. For 130783/130783 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18257 event pairs, 750 based on Foata normal form. 2/3539 useless extension candidates. Maximal degree in co-relation 22262. Up to 3247 conditions per place. [2024-06-27 20:17:22,678 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 17 changer transitions 0/149 dead transitions. [2024-06-27 20:17:22,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1286 flow [2024-06-27 20:17:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:17:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:17:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:17:22,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:17:22,679 INFO L175 Difference]: Start difference. First operand has 112 places, 123 transitions, 906 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:17:22,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1286 flow [2024-06-27 20:17:22,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 149 transitions, 1218 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:22,738 INFO L231 Difference]: Finished difference. Result has 113 places, 126 transitions, 942 flow [2024-06-27 20:17:22,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=942, PETRI_PLACES=113, PETRI_TRANSITIONS=126} [2024-06-27 20:17:22,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 20:17:22,739 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 126 transitions, 942 flow [2024-06-27 20:17:22,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 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) [2024-06-27 20:17:22,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:22,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:22,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:17:22,740 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)] === [2024-06-27 20:17:22,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1817676521, now seen corresponding path program 1 times [2024-06-27 20:17:22,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747055946] [2024-06-27 20:17:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:22,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:23,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:23,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747055946] [2024-06-27 20:17:23,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747055946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:23,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:23,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:23,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730391486] [2024-06-27 20:17:23,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:23,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:23,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:23,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:23,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:23,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:23,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 126 transitions, 942 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:23,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:23,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:23,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:24,069 INFO L124 PetriNetUnfolderBase]: 2709/4148 cut-off events. [2024-06-27 20:17:24,070 INFO L125 PetriNetUnfolderBase]: For 181601/181601 co-relation queries the response was YES. [2024-06-27 20:17:24,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27609 conditions, 4148 events. 2709/4148 cut-off events. For 181601/181601 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 20974 event pairs, 1070 based on Foata normal form. 1/4147 useless extension candidates. Maximal degree in co-relation 27560. Up to 3957 conditions per place. [2024-06-27 20:17:24,101 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2024-06-27 20:17:24,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 138 transitions, 1216 flow [2024-06-27 20:17:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:17:24,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 20:17:24,102 INFO L175 Difference]: Start difference. First operand has 113 places, 126 transitions, 942 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:17:24,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 138 transitions, 1216 flow [2024-06-27 20:17:24,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1136 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:24,198 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 922 flow [2024-06-27 20:17:24,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=922, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-27 20:17:24,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 20:17:24,199 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 922 flow [2024-06-27 20:17:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:24,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:24,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:17:24,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:24,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1340287382, now seen corresponding path program 1 times [2024-06-27 20:17:24,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:24,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369145374] [2024-06-27 20:17:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:25,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:25,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369145374] [2024-06-27 20:17:25,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369145374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:25,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:25,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:25,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747867776] [2024-06-27 20:17:25,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:25,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:25,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:25,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:25,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:25,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:25,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 922 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:25,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:25,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:26,248 INFO L124 PetriNetUnfolderBase]: 2372/3696 cut-off events. [2024-06-27 20:17:26,248 INFO L125 PetriNetUnfolderBase]: For 173680/173680 co-relation queries the response was YES. [2024-06-27 20:17:26,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25660 conditions, 3696 events. 2372/3696 cut-off events. For 173680/173680 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19192 event pairs, 590 based on Foata normal form. 4/3698 useless extension candidates. Maximal degree in co-relation 25610. Up to 3282 conditions per place. [2024-06-27 20:17:26,272 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 135 selfloop transitions, 25 changer transitions 0/177 dead transitions. [2024-06-27 20:17:26,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1572 flow [2024-06-27 20:17:26,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:17:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:17:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 20:17:26,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 20:17:26,273 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 922 flow. Second operand 10 states and 205 transitions. [2024-06-27 20:17:26,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1572 flow [2024-06-27 20:17:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1534 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:17:26,352 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 1049 flow [2024-06-27 20:17:26,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1049, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-06-27 20:17:26,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-27 20:17:26,352 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 1049 flow [2024-06-27 20:17:26,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:26,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:26,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:26,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:17:26,353 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:26,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1340226808, now seen corresponding path program 1 times [2024-06-27 20:17:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111684708] [2024-06-27 20:17:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:27,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111684708] [2024-06-27 20:17:27,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111684708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:27,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:27,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:27,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775778428] [2024-06-27 20:17:27,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:27,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:27,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:27,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 1049 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:27,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:27,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:28,396 INFO L124 PetriNetUnfolderBase]: 2512/3841 cut-off events. [2024-06-27 20:17:28,397 INFO L125 PetriNetUnfolderBase]: For 185923/185923 co-relation queries the response was YES. [2024-06-27 20:17:28,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27149 conditions, 3841 events. 2512/3841 cut-off events. For 185923/185923 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19385 event pairs, 780 based on Foata normal form. 2/3841 useless extension candidates. Maximal degree in co-relation 27098. Up to 3573 conditions per place. [2024-06-27 20:17:28,425 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 148 selfloop transitions, 26 changer transitions 0/180 dead transitions. [2024-06-27 20:17:28,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 180 transitions, 1567 flow [2024-06-27 20:17:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:17:28,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:17:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 20:17:28,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:17:28,426 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 1049 flow. Second operand 11 states and 209 transitions. [2024-06-27 20:17:28,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 180 transitions, 1567 flow [2024-06-27 20:17:28,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 180 transitions, 1480 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:28,530 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 1087 flow [2024-06-27 20:17:28,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1087, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2024-06-27 20:17:28,531 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-27 20:17:28,531 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 1087 flow [2024-06-27 20:17:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:28,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:28,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:17:28,531 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:28,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1786861598, now seen corresponding path program 2 times [2024-06-27 20:17:28,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:28,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257931418] [2024-06-27 20:17:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:29,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257931418] [2024-06-27 20:17:29,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257931418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:29,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:29,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478798775] [2024-06-27 20:17:29,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:29,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:29,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:29,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:29,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 1087 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:29,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:29,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:29,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:30,567 INFO L124 PetriNetUnfolderBase]: 2417/3761 cut-off events. [2024-06-27 20:17:30,568 INFO L125 PetriNetUnfolderBase]: For 199190/199190 co-relation queries the response was YES. [2024-06-27 20:17:30,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27207 conditions, 3761 events. 2417/3761 cut-off events. For 199190/199190 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19525 event pairs, 745 based on Foata normal form. 4/3763 useless extension candidates. Maximal degree in co-relation 27154. Up to 3396 conditions per place. [2024-06-27 20:17:30,594 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 139 selfloop transitions, 25 changer transitions 0/182 dead transitions. [2024-06-27 20:17:30,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 182 transitions, 1583 flow [2024-06-27 20:17:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:17:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:17:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:17:30,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-27 20:17:30,595 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 1087 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:17:30,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 182 transitions, 1583 flow [2024-06-27 20:17:30,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 182 transitions, 1479 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:30,673 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1108 flow [2024-06-27 20:17:30,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1108, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-06-27 20:17:30,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-27 20:17:30,674 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1108 flow [2024-06-27 20:17:30,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:30,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:30,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:30,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:17:30,674 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:30,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash 399232616, now seen corresponding path program 1 times [2024-06-27 20:17:30,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:30,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278926128] [2024-06-27 20:17:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:30,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:31,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278926128] [2024-06-27 20:17:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278926128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:31,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:31,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486081136] [2024-06-27 20:17:31,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:31,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:31,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:31,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:31,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:31,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1108 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:31,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:31,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:31,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:32,428 INFO L124 PetriNetUnfolderBase]: 2565/3920 cut-off events. [2024-06-27 20:17:32,428 INFO L125 PetriNetUnfolderBase]: For 213222/213222 co-relation queries the response was YES. [2024-06-27 20:17:32,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28531 conditions, 3920 events. 2565/3920 cut-off events. For 213222/213222 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19838 event pairs, 769 based on Foata normal form. 4/3920 useless extension candidates. Maximal degree in co-relation 28477. Up to 3678 conditions per place. [2024-06-27 20:17:32,455 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 152 selfloop transitions, 20 changer transitions 0/178 dead transitions. [2024-06-27 20:17:32,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 178 transitions, 1598 flow [2024-06-27 20:17:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:17:32,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-27 20:17:32,456 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1108 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:17:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 178 transitions, 1598 flow [2024-06-27 20:17:32,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 1529 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:17:32,544 INFO L231 Difference]: Finished difference. Result has 128 places, 144 transitions, 1151 flow [2024-06-27 20:17:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1151, PETRI_PLACES=128, PETRI_TRANSITIONS=144} [2024-06-27 20:17:32,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-06-27 20:17:32,544 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 144 transitions, 1151 flow [2024-06-27 20:17:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:32,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:32,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:17:32,545 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:32,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1789658108, now seen corresponding path program 3 times [2024-06-27 20:17:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354400674] [2024-06-27 20:17:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:33,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354400674] [2024-06-27 20:17:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354400674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:33,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:33,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:33,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258787198] [2024-06-27 20:17:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:33,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:33,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:33,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:33,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 144 transitions, 1151 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:33,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:33,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:33,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:34,821 INFO L124 PetriNetUnfolderBase]: 2430/3781 cut-off events. [2024-06-27 20:17:34,821 INFO L125 PetriNetUnfolderBase]: For 222111/222111 co-relation queries the response was YES. [2024-06-27 20:17:34,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28167 conditions, 3781 events. 2430/3781 cut-off events. For 222111/222111 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19646 event pairs, 734 based on Foata normal form. 4/3781 useless extension candidates. Maximal degree in co-relation 28112. Up to 3441 conditions per place. [2024-06-27 20:17:34,849 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 141 selfloop transitions, 19 changer transitions 0/178 dead transitions. [2024-06-27 20:17:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 178 transitions, 1557 flow [2024-06-27 20:17:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:17:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:17:34,897 INFO L175 Difference]: Start difference. First operand has 128 places, 144 transitions, 1151 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:17:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 178 transitions, 1557 flow [2024-06-27 20:17:34,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 178 transitions, 1437 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:34,970 INFO L231 Difference]: Finished difference. Result has 130 places, 144 transitions, 1076 flow [2024-06-27 20:17:34,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1076, PETRI_PLACES=130, PETRI_TRANSITIONS=144} [2024-06-27 20:17:34,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-27 20:17:34,971 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 144 transitions, 1076 flow [2024-06-27 20:17:34,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:34,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:34,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:34,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:17:34,971 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:34,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1905127032, now seen corresponding path program 2 times [2024-06-27 20:17:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:34,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6562295] [2024-06-27 20:17:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:34,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:36,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6562295] [2024-06-27 20:17:36,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6562295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:36,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:36,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633687693] [2024-06-27 20:17:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:36,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:36,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:36,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:36,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 144 transitions, 1076 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:36,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:36,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:36,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:36,770 INFO L124 PetriNetUnfolderBase]: 2568/3925 cut-off events. [2024-06-27 20:17:36,770 INFO L125 PetriNetUnfolderBase]: For 233450/233453 co-relation queries the response was YES. [2024-06-27 20:17:36,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29221 conditions, 3925 events. 2568/3925 cut-off events. For 233450/233453 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19910 event pairs, 777 based on Foata normal form. 2/3922 useless extension candidates. Maximal degree in co-relation 29165. Up to 3565 conditions per place. [2024-06-27 20:17:36,795 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 53 changer transitions 0/177 dead transitions. [2024-06-27 20:17:36,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 177 transitions, 1560 flow [2024-06-27 20:17:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:17:36,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:17:36,796 INFO L175 Difference]: Start difference. First operand has 130 places, 144 transitions, 1076 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:17:36,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 177 transitions, 1560 flow [2024-06-27 20:17:36,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 177 transitions, 1498 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:36,898 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1200 flow [2024-06-27 20:17:36,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1200, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-27 20:17:36,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-27 20:17:36,899 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1200 flow [2024-06-27 20:17:36,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:36,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:36,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:36,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:17:36,900 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:36,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1905127218, now seen corresponding path program 2 times [2024-06-27 20:17:36,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:36,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371452597] [2024-06-27 20:17:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371452597] [2024-06-27 20:17:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371452597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:37,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822996673] [2024-06-27 20:17:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:37,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:37,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:37,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:37,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1200 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:37,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:37,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:37,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:38,673 INFO L124 PetriNetUnfolderBase]: 2670/4077 cut-off events. [2024-06-27 20:17:38,673 INFO L125 PetriNetUnfolderBase]: For 258596/258599 co-relation queries the response was YES. [2024-06-27 20:17:38,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31444 conditions, 4077 events. 2670/4077 cut-off events. For 258596/258599 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20765 event pairs, 754 based on Foata normal form. 4/4076 useless extension candidates. Maximal degree in co-relation 31387. Up to 3487 conditions per place. [2024-06-27 20:17:38,704 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 125 selfloop transitions, 68 changer transitions 0/199 dead transitions. [2024-06-27 20:17:38,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 199 transitions, 2374 flow [2024-06-27 20:17:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 20:17:38,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 20:17:38,705 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1200 flow. Second operand 9 states and 190 transitions. [2024-06-27 20:17:38,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 199 transitions, 2374 flow [2024-06-27 20:17:38,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 199 transitions, 2212 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:38,845 INFO L231 Difference]: Finished difference. Result has 132 places, 159 transitions, 1452 flow [2024-06-27 20:17:38,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1452, PETRI_PLACES=132, PETRI_TRANSITIONS=159} [2024-06-27 20:17:38,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-27 20:17:38,846 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 159 transitions, 1452 flow [2024-06-27 20:17:38,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:38,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:38,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:38,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:17:38,846 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:38,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1905133728, now seen corresponding path program 3 times [2024-06-27 20:17:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306596607] [2024-06-27 20:17:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:39,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:39,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306596607] [2024-06-27 20:17:39,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306596607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:39,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:39,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:39,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413806830] [2024-06-27 20:17:39,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:39,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:39,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:39,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 159 transitions, 1452 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:39,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:39,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:39,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:40,476 INFO L124 PetriNetUnfolderBase]: 2660/4068 cut-off events. [2024-06-27 20:17:40,476 INFO L125 PetriNetUnfolderBase]: For 271117/271120 co-relation queries the response was YES. [2024-06-27 20:17:40,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31971 conditions, 4068 events. 2660/4068 cut-off events. For 271117/271120 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20750 event pairs, 749 based on Foata normal form. 4/4067 useless extension candidates. Maximal degree in co-relation 31913. Up to 3479 conditions per place. [2024-06-27 20:17:40,505 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 120 selfloop transitions, 70 changer transitions 0/196 dead transitions. [2024-06-27 20:17:40,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 196 transitions, 2216 flow [2024-06-27 20:17:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 20:17:40,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 20:17:40,506 INFO L175 Difference]: Start difference. First operand has 132 places, 159 transitions, 1452 flow. Second operand 9 states and 186 transitions. [2024-06-27 20:17:40,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 196 transitions, 2216 flow [2024-06-27 20:17:40,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 196 transitions, 2070 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 20:17:40,662 INFO L231 Difference]: Finished difference. Result has 138 places, 159 transitions, 1454 flow [2024-06-27 20:17:40,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1454, PETRI_PLACES=138, PETRI_TRANSITIONS=159} [2024-06-27 20:17:40,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-27 20:17:40,663 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 159 transitions, 1454 flow [2024-06-27 20:17:40,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:40,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:40,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:40,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:17:40,663 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:40,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:40,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1222139252, now seen corresponding path program 4 times [2024-06-27 20:17:40,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:40,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289164352] [2024-06-27 20:17:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:40,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:41,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:41,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289164352] [2024-06-27 20:17:41,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289164352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:41,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:41,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981983273] [2024-06-27 20:17:41,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:41,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:41,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:41,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 159 transitions, 1454 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:41,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:41,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:41,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:42,664 INFO L124 PetriNetUnfolderBase]: 2546/3959 cut-off events. [2024-06-27 20:17:42,665 INFO L125 PetriNetUnfolderBase]: For 282330/282333 co-relation queries the response was YES. [2024-06-27 20:17:42,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31639 conditions, 3959 events. 2546/3959 cut-off events. For 282330/282333 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20669 event pairs, 752 based on Foata normal form. 6/3960 useless extension candidates. Maximal degree in co-relation 31579. Up to 3563 conditions per place. [2024-06-27 20:17:42,697 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 142 selfloop transitions, 31 changer transitions 0/192 dead transitions. [2024-06-27 20:17:42,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 192 transitions, 1942 flow [2024-06-27 20:17:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:17:42,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 20:17:42,698 INFO L175 Difference]: Start difference. First operand has 138 places, 159 transitions, 1454 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:17:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 192 transitions, 1942 flow [2024-06-27 20:17:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 192 transitions, 1804 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:42,821 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1453 flow [2024-06-27 20:17:42,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1453, PETRI_PLACES=140, PETRI_TRANSITIONS=161} [2024-06-27 20:17:42,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-27 20:17:42,822 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1453 flow [2024-06-27 20:17:42,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:42,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:42,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:42,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:17:42,822 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:42,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1904949402, now seen corresponding path program 3 times [2024-06-27 20:17:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:42,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992308045] [2024-06-27 20:17:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992308045] [2024-06-27 20:17:43,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992308045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:43,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:43,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:43,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564127026] [2024-06-27 20:17:43,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:43,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:43,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:43,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:43,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:43,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 161 transitions, 1453 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:43,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:43,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:43,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:44,727 INFO L124 PetriNetUnfolderBase]: 2688/4111 cut-off events. [2024-06-27 20:17:44,727 INFO L125 PetriNetUnfolderBase]: For 297274/297277 co-relation queries the response was YES. [2024-06-27 20:17:44,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33024 conditions, 4111 events. 2688/4111 cut-off events. For 297274/297277 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21004 event pairs, 786 based on Foata normal form. 2/4108 useless extension candidates. Maximal degree in co-relation 32963. Up to 3718 conditions per place. [2024-06-27 20:17:44,756 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 134 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2024-06-27 20:17:44,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 1999 flow [2024-06-27 20:17:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:17:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:17:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:17:44,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 20:17:44,758 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1453 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:17:44,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 1999 flow [2024-06-27 20:17:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 1880 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:44,877 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1541 flow [2024-06-27 20:17:44,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1541, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2024-06-27 20:17:44,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-27 20:17:44,878 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1541 flow [2024-06-27 20:17:44,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:44,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:44,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:17:44,879 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:44,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1904954238, now seen corresponding path program 4 times [2024-06-27 20:17:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:44,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118682260] [2024-06-27 20:17:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:45,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:45,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118682260] [2024-06-27 20:17:45,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118682260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:45,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:45,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:45,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696195275] [2024-06-27 20:17:45,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:45,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:45,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:45,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1541 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:45,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:45,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:45,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:46,558 INFO L124 PetriNetUnfolderBase]: 2678/4092 cut-off events. [2024-06-27 20:17:46,559 INFO L125 PetriNetUnfolderBase]: For 310328/310331 co-relation queries the response was YES. [2024-06-27 20:17:46,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33431 conditions, 4092 events. 2678/4092 cut-off events. For 310328/310331 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20867 event pairs, 752 based on Foata normal form. 4/4091 useless extension candidates. Maximal degree in co-relation 33369. Up to 3514 conditions per place. [2024-06-27 20:17:46,591 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 127 selfloop transitions, 67 changer transitions 0/200 dead transitions. [2024-06-27 20:17:46,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 200 transitions, 2181 flow [2024-06-27 20:17:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:46,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 20:17:46,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 20:17:46,593 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1541 flow. Second operand 9 states and 187 transitions. [2024-06-27 20:17:46,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 200 transitions, 2181 flow [2024-06-27 20:17:46,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 200 transitions, 1964 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 20:17:46,747 INFO L231 Difference]: Finished difference. Result has 144 places, 164 transitions, 1466 flow [2024-06-27 20:17:46,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1466, PETRI_PLACES=144, PETRI_TRANSITIONS=164} [2024-06-27 20:17:46,747 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-27 20:17:46,747 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 164 transitions, 1466 flow [2024-06-27 20:17:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:46,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:46,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:46,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:17:46,748 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)] === [2024-06-27 20:17:46,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 500049978, now seen corresponding path program 1 times [2024-06-27 20:17:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439245719] [2024-06-27 20:17:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:46,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439245719] [2024-06-27 20:17:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439245719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:47,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:17:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511637993] [2024-06-27 20:17:47,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:17:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:17:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:17:47,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:17:47,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 164 transitions, 1466 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:47,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:47,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:17:47,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:48,162 INFO L124 PetriNetUnfolderBase]: 2769/4312 cut-off events. [2024-06-27 20:17:48,162 INFO L125 PetriNetUnfolderBase]: For 360486/360492 co-relation queries the response was YES. [2024-06-27 20:17:48,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36023 conditions, 4312 events. 2769/4312 cut-off events. For 360486/360492 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 22513 event pairs, 926 based on Foata normal form. 4/4293 useless extension candidates. Maximal degree in co-relation 35960. Up to 3934 conditions per place. [2024-06-27 20:17:48,193 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 138 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-27 20:17:48,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 186 transitions, 1968 flow [2024-06-27 20:17:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:17:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:17:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:17:48,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 20:17:48,194 INFO L175 Difference]: Start difference. First operand has 144 places, 164 transitions, 1466 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:17:48,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 186 transitions, 1968 flow [2024-06-27 20:17:48,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 186 transitions, 1794 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:17:48,353 INFO L231 Difference]: Finished difference. Result has 141 places, 170 transitions, 1409 flow [2024-06-27 20:17:48,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1409, PETRI_PLACES=141, PETRI_TRANSITIONS=170} [2024-06-27 20:17:48,354 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-27 20:17:48,354 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 170 transitions, 1409 flow [2024-06-27 20:17:48,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:17:48,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:48,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:48,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:17:48,355 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:48,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash 566007968, now seen corresponding path program 5 times [2024-06-27 20:17:48,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:48,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543003022] [2024-06-27 20:17:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:48,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543003022] [2024-06-27 20:17:49,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543003022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:49,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:49,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:49,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953836082] [2024-06-27 20:17:49,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:49,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:49,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:49,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:49,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:49,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:49,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 170 transitions, 1409 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:49,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:49,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:49,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:50,047 INFO L124 PetriNetUnfolderBase]: 2739/4171 cut-off events. [2024-06-27 20:17:50,047 INFO L125 PetriNetUnfolderBase]: For 337627/337627 co-relation queries the response was YES. [2024-06-27 20:17:50,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34667 conditions, 4171 events. 2739/4171 cut-off events. For 337627/337627 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21194 event pairs, 778 based on Foata normal form. 4/4171 useless extension candidates. Maximal degree in co-relation 34603. Up to 3917 conditions per place. [2024-06-27 20:17:50,076 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 176 selfloop transitions, 20 changer transitions 0/202 dead transitions. [2024-06-27 20:17:50,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 202 transitions, 1949 flow [2024-06-27 20:17:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:17:50,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 20:17:50,077 INFO L175 Difference]: Start difference. First operand has 141 places, 170 transitions, 1409 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:17:50,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 202 transitions, 1949 flow [2024-06-27 20:17:50,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 202 transitions, 1913 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 20:17:50,259 INFO L231 Difference]: Finished difference. Result has 148 places, 173 transitions, 1499 flow [2024-06-27 20:17:50,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1499, PETRI_PLACES=148, PETRI_TRANSITIONS=173} [2024-06-27 20:17:50,259 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-27 20:17:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 173 transitions, 1499 flow [2024-06-27 20:17:50,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:50,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:50,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:17:50,260 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:50,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1368381500, now seen corresponding path program 4 times [2024-06-27 20:17:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674086013] [2024-06-27 20:17:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674086013] [2024-06-27 20:17:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674086013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436546565] [2024-06-27 20:17:51,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:51,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:51,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 173 transitions, 1499 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:51,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:51,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:51,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:52,147 INFO L124 PetriNetUnfolderBase]: 2750/4187 cut-off events. [2024-06-27 20:17:52,148 INFO L125 PetriNetUnfolderBase]: For 351649/351649 co-relation queries the response was YES. [2024-06-27 20:17:52,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35260 conditions, 4187 events. 2750/4187 cut-off events. For 351649/351649 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 21263 event pairs, 783 based on Foata normal form. 2/4185 useless extension candidates. Maximal degree in co-relation 35194. Up to 3956 conditions per place. [2024-06-27 20:17:52,178 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 177 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2024-06-27 20:17:52,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2043 flow [2024-06-27 20:17:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:17:52,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-27 20:17:52,179 INFO L175 Difference]: Start difference. First operand has 148 places, 173 transitions, 1499 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:17:52,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2043 flow [2024-06-27 20:17:52,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 203 transitions, 1947 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:52,367 INFO L231 Difference]: Finished difference. Result has 150 places, 176 transitions, 1539 flow [2024-06-27 20:17:52,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1539, PETRI_PLACES=150, PETRI_TRANSITIONS=176} [2024-06-27 20:17:52,367 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-27 20:17:52,367 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 176 transitions, 1539 flow [2024-06-27 20:17:52,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:52,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:52,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:52,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:17:52,368 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:52,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash 557727248, now seen corresponding path program 6 times [2024-06-27 20:17:52,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:52,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498725835] [2024-06-27 20:17:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:52,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:53,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498725835] [2024-06-27 20:17:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498725835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:53,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:53,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:53,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922772724] [2024-06-27 20:17:53,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:53,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:53,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:53,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 176 transitions, 1539 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:53,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:53,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:53,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:54,189 INFO L124 PetriNetUnfolderBase]: 2804/4270 cut-off events. [2024-06-27 20:17:54,189 INFO L125 PetriNetUnfolderBase]: For 375771/375771 co-relation queries the response was YES. [2024-06-27 20:17:54,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36661 conditions, 4270 events. 2804/4270 cut-off events. For 375771/375771 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21766 event pairs, 778 based on Foata normal form. 4/4270 useless extension candidates. Maximal degree in co-relation 36594. Up to 3928 conditions per place. [2024-06-27 20:17:54,241 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 175 selfloop transitions, 33 changer transitions 0/214 dead transitions. [2024-06-27 20:17:54,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 214 transitions, 2365 flow [2024-06-27 20:17:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:17:54,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 20:17:54,243 INFO L175 Difference]: Start difference. First operand has 150 places, 176 transitions, 1539 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:17:54,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 214 transitions, 2365 flow [2024-06-27 20:17:54,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 214 transitions, 2253 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:54,519 INFO L231 Difference]: Finished difference. Result has 152 places, 182 transitions, 1663 flow [2024-06-27 20:17:54,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1663, PETRI_PLACES=152, PETRI_TRANSITIONS=182} [2024-06-27 20:17:54,519 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-27 20:17:54,520 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 182 transitions, 1663 flow [2024-06-27 20:17:54,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:54,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:54,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:54,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:17:54,520 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:54,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2070593372, now seen corresponding path program 7 times [2024-06-27 20:17:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213124079] [2024-06-27 20:17:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:54,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:55,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:55,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213124079] [2024-06-27 20:17:55,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213124079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:55,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:55,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:55,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690169151] [2024-06-27 20:17:55,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:55,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:55,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:55,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:55,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:55,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 182 transitions, 1663 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:55,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:55,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:55,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:56,225 INFO L124 PetriNetUnfolderBase]: 2826/4307 cut-off events. [2024-06-27 20:17:56,226 INFO L125 PetriNetUnfolderBase]: For 392567/392567 co-relation queries the response was YES. [2024-06-27 20:17:56,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37332 conditions, 4307 events. 2826/4307 cut-off events. For 392567/392567 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22020 event pairs, 778 based on Foata normal form. 4/4307 useless extension candidates. Maximal degree in co-relation 37264. Up to 3845 conditions per place. [2024-06-27 20:17:56,260 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 159 selfloop transitions, 52 changer transitions 0/217 dead transitions. [2024-06-27 20:17:56,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 217 transitions, 2427 flow [2024-06-27 20:17:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:17:56,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-27 20:17:56,261 INFO L175 Difference]: Start difference. First operand has 152 places, 182 transitions, 1663 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:17:56,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 217 transitions, 2427 flow [2024-06-27 20:17:56,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 217 transitions, 2321 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:17:56,428 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 1753 flow [2024-06-27 20:17:56,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1753, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-27 20:17:56,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 20:17:56,429 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 1753 flow [2024-06-27 20:17:56,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:56,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:56,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:56,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:17:56,429 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:56,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash 557733758, now seen corresponding path program 8 times [2024-06-27 20:17:56,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:56,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690930729] [2024-06-27 20:17:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:56,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:57,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:57,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690930729] [2024-06-27 20:17:57,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690930729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:57,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:57,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:57,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913867297] [2024-06-27 20:17:57,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:57,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:57,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:57,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:57,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 1753 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:57,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:57,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:57,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:17:58,101 INFO L124 PetriNetUnfolderBase]: 2816/4293 cut-off events. [2024-06-27 20:17:58,102 INFO L125 PetriNetUnfolderBase]: For 402901/402901 co-relation queries the response was YES. [2024-06-27 20:17:58,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37426 conditions, 4293 events. 2816/4293 cut-off events. For 402901/402901 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 21960 event pairs, 783 based on Foata normal form. 4/4293 useless extension candidates. Maximal degree in co-relation 37356. Up to 3952 conditions per place. [2024-06-27 20:17:58,138 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 177 selfloop transitions, 32 changer transitions 0/215 dead transitions. [2024-06-27 20:17:58,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 215 transitions, 2251 flow [2024-06-27 20:17:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:17:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:17:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:17:58,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-27 20:17:58,140 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 1753 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:17:58,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 215 transitions, 2251 flow [2024-06-27 20:17:58,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 215 transitions, 2011 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-27 20:17:58,515 INFO L231 Difference]: Finished difference. Result has 158 places, 185 transitions, 1585 flow [2024-06-27 20:17:58,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1585, PETRI_PLACES=158, PETRI_TRANSITIONS=185} [2024-06-27 20:17:58,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-27 20:17:58,515 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 185 transitions, 1585 flow [2024-06-27 20:17:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:58,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:17:58,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:17:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:17:58,515 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:17:58,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:17:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash 329652932, now seen corresponding path program 5 times [2024-06-27 20:17:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:17:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319532524] [2024-06-27 20:17:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:17:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:17:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:17:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:17:59,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:17:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319532524] [2024-06-27 20:17:59,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319532524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:17:59,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:17:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:17:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776649287] [2024-06-27 20:17:59,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:17:59,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:17:59,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:17:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:17:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:17:59,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:17:59,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 185 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:17:59,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:17:59,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:17:59,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:00,367 INFO L124 PetriNetUnfolderBase]: 2827/4309 cut-off events. [2024-06-27 20:18:00,368 INFO L125 PetriNetUnfolderBase]: For 414102/414102 co-relation queries the response was YES. [2024-06-27 20:18:00,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37535 conditions, 4309 events. 2827/4309 cut-off events. For 414102/414102 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21976 event pairs, 788 based on Foata normal form. 2/4307 useless extension candidates. Maximal degree in co-relation 37464. Up to 4023 conditions per place. [2024-06-27 20:18:00,405 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 176 selfloop transitions, 33 changer transitions 0/215 dead transitions. [2024-06-27 20:18:00,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 215 transitions, 2159 flow [2024-06-27 20:18:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:18:00,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-27 20:18:00,406 INFO L175 Difference]: Start difference. First operand has 158 places, 185 transitions, 1585 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:18:00,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 215 transitions, 2159 flow [2024-06-27 20:18:00,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 215 transitions, 2077 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:00,674 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 1671 flow [2024-06-27 20:18:00,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1671, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-27 20:18:00,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-27 20:18:00,674 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 1671 flow [2024-06-27 20:18:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:00,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:00,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:00,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:18:00,675 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:00,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 329648158, now seen corresponding path program 5 times [2024-06-27 20:18:00,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:00,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373192112] [2024-06-27 20:18:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:01,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:01,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373192112] [2024-06-27 20:18:01,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373192112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:01,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:01,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124072404] [2024-06-27 20:18:01,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:01,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:01,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 1671 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:01,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:01,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:01,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:02,639 INFO L124 PetriNetUnfolderBase]: 2684/4157 cut-off events. [2024-06-27 20:18:02,639 INFO L125 PetriNetUnfolderBase]: For 426368/426368 co-relation queries the response was YES. [2024-06-27 20:18:02,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36732 conditions, 4157 events. 2684/4157 cut-off events. For 426368/426368 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21792 event pairs, 756 based on Foata normal form. 4/4157 useless extension candidates. Maximal degree in co-relation 36660. Up to 3786 conditions per place. [2024-06-27 20:18:02,679 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 177 selfloop transitions, 19 changer transitions 0/218 dead transitions. [2024-06-27 20:18:02,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 218 transitions, 2207 flow [2024-06-27 20:18:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:18:02,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 20:18:02,686 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 1671 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:18:02,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 218 transitions, 2207 flow [2024-06-27 20:18:03,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 218 transitions, 2063 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:03,020 INFO L231 Difference]: Finished difference. Result has 161 places, 190 transitions, 1650 flow [2024-06-27 20:18:03,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1650, PETRI_PLACES=161, PETRI_TRANSITIONS=190} [2024-06-27 20:18:03,021 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-27 20:18:03,021 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 190 transitions, 1650 flow [2024-06-27 20:18:03,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:03,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:03,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:03,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:18:03,021 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:03,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:03,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2070772862, now seen corresponding path program 9 times [2024-06-27 20:18:03,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:03,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765672540] [2024-06-27 20:18:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:03,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:03,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765672540] [2024-06-27 20:18:03,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765672540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:03,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:03,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:03,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314772427] [2024-06-27 20:18:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:03,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:03,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:03,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 190 transitions, 1650 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:03,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:03,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:04,801 INFO L124 PetriNetUnfolderBase]: 2841/4329 cut-off events. [2024-06-27 20:18:04,801 INFO L125 PetriNetUnfolderBase]: For 448030/448030 co-relation queries the response was YES. [2024-06-27 20:18:04,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38530 conditions, 4329 events. 2841/4329 cut-off events. For 448030/448030 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22154 event pairs, 786 based on Foata normal form. 4/4329 useless extension candidates. Maximal degree in co-relation 38457. Up to 3860 conditions per place. [2024-06-27 20:18:04,839 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 166 selfloop transitions, 53 changer transitions 0/225 dead transitions. [2024-06-27 20:18:04,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 225 transitions, 2436 flow [2024-06-27 20:18:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:18:04,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 20:18:04,840 INFO L175 Difference]: Start difference. First operand has 161 places, 190 transitions, 1650 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:18:04,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 225 transitions, 2436 flow [2024-06-27 20:18:05,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 225 transitions, 2331 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:05,064 INFO L231 Difference]: Finished difference. Result has 163 places, 193 transitions, 1733 flow [2024-06-27 20:18:05,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1733, PETRI_PLACES=163, PETRI_TRANSITIONS=193} [2024-06-27 20:18:05,064 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-27 20:18:05,065 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 193 transitions, 1733 flow [2024-06-27 20:18:05,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:05,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:05,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:05,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:18:05,065 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:05,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash 329825912, now seen corresponding path program 6 times [2024-06-27 20:18:05,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:05,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171314452] [2024-06-27 20:18:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:05,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:06,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171314452] [2024-06-27 20:18:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171314452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:06,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:06,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:06,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143578740] [2024-06-27 20:18:06,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:06,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:06,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 193 transitions, 1733 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:06,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:06,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:07,098 INFO L124 PetriNetUnfolderBase]: 2852/4345 cut-off events. [2024-06-27 20:18:07,098 INFO L125 PetriNetUnfolderBase]: For 461984/461984 co-relation queries the response was YES. [2024-06-27 20:18:07,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39063 conditions, 4345 events. 2852/4345 cut-off events. For 461984/461984 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22260 event pairs, 791 based on Foata normal form. 2/4343 useless extension candidates. Maximal degree in co-relation 38989. Up to 4059 conditions per place. [2024-06-27 20:18:07,141 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 185 selfloop transitions, 32 changer transitions 0/223 dead transitions. [2024-06-27 20:18:07,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 223 transitions, 2331 flow [2024-06-27 20:18:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:18:07,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-27 20:18:07,144 INFO L175 Difference]: Start difference. First operand has 163 places, 193 transitions, 1733 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:18:07,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 223 transitions, 2331 flow [2024-06-27 20:18:07,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 223 transitions, 2141 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:07,489 INFO L231 Difference]: Finished difference. Result has 165 places, 196 transitions, 1717 flow [2024-06-27 20:18:07,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1717, PETRI_PLACES=165, PETRI_TRANSITIONS=196} [2024-06-27 20:18:07,489 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-27 20:18:07,489 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 196 transitions, 1717 flow [2024-06-27 20:18:07,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:07,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:07,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:07,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:18:07,490 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:07,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 329648282, now seen corresponding path program 7 times [2024-06-27 20:18:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:07,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168777550] [2024-06-27 20:18:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168777550] [2024-06-27 20:18:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168777550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810176486] [2024-06-27 20:18:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:08,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:08,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:08,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 196 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:08,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:08,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:08,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:09,459 INFO L124 PetriNetUnfolderBase]: 2847/4338 cut-off events. [2024-06-27 20:18:09,459 INFO L125 PetriNetUnfolderBase]: For 477642/477642 co-relation queries the response was YES. [2024-06-27 20:18:09,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39135 conditions, 4338 events. 2847/4338 cut-off events. For 477642/477642 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22289 event pairs, 791 based on Foata normal form. 2/4336 useless extension candidates. Maximal degree in co-relation 39061. Up to 4016 conditions per place. [2024-06-27 20:18:09,498 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 179 selfloop transitions, 45 changer transitions 0/230 dead transitions. [2024-06-27 20:18:09,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 230 transitions, 2345 flow [2024-06-27 20:18:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:18:09,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:18:09,499 INFO L175 Difference]: Start difference. First operand has 165 places, 196 transitions, 1717 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:18:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 230 transitions, 2345 flow [2024-06-27 20:18:09,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 230 transitions, 2195 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:09,825 INFO L231 Difference]: Finished difference. Result has 168 places, 199 transitions, 1777 flow [2024-06-27 20:18:09,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1777, PETRI_PLACES=168, PETRI_TRANSITIONS=199} [2024-06-27 20:18:09,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-27 20:18:09,826 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 199 transitions, 1777 flow [2024-06-27 20:18:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:09,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:09,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:09,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:18:09,827 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:09,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash 329826098, now seen corresponding path program 10 times [2024-06-27 20:18:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609568881] [2024-06-27 20:18:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:09,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:10,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:10,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609568881] [2024-06-27 20:18:10,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609568881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:10,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:10,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44927164] [2024-06-27 20:18:10,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:10,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:10,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:10,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 199 transitions, 1777 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:10,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:10,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:10,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:11,648 INFO L124 PetriNetUnfolderBase]: 2837/4324 cut-off events. [2024-06-27 20:18:11,649 INFO L125 PetriNetUnfolderBase]: For 494135/494135 co-relation queries the response was YES. [2024-06-27 20:18:11,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39465 conditions, 4324 events. 2837/4324 cut-off events. For 494135/494135 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22127 event pairs, 784 based on Foata normal form. 4/4324 useless extension candidates. Maximal degree in co-relation 39390. Up to 3861 conditions per place. [2024-06-27 20:18:11,684 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 172 selfloop transitions, 52 changer transitions 0/230 dead transitions. [2024-06-27 20:18:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 230 transitions, 2309 flow [2024-06-27 20:18:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:18:11,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 20:18:11,685 INFO L175 Difference]: Start difference. First operand has 168 places, 199 transitions, 1777 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:18:11,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 230 transitions, 2309 flow [2024-06-27 20:18:11,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2079 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:11,993 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 1659 flow [2024-06-27 20:18:11,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1659, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-27 20:18:11,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 20:18:11,994 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 1659 flow [2024-06-27 20:18:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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) [2024-06-27 20:18:11,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:11,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:11,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:18:11,994 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)] === [2024-06-27 20:18:11,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1981780848, now seen corresponding path program 2 times [2024-06-27 20:18:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:11,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189119861] [2024-06-27 20:18:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:12,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:12,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189119861] [2024-06-27 20:18:12,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189119861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:12,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:12,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:12,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312460014] [2024-06-27 20:18:12,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:12,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 20:18:12,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 1659 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:12,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 20:18:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:13,356 INFO L124 PetriNetUnfolderBase]: 2900/4505 cut-off events. [2024-06-27 20:18:13,357 INFO L125 PetriNetUnfolderBase]: For 545566/545578 co-relation queries the response was YES. [2024-06-27 20:18:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41150 conditions, 4505 events. 2900/4505 cut-off events. For 545566/545578 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23579 event pairs, 919 based on Foata normal form. 9/4486 useless extension candidates. Maximal degree in co-relation 41074. Up to 4131 conditions per place. [2024-06-27 20:18:13,400 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 163 selfloop transitions, 11 changer transitions 0/208 dead transitions. [2024-06-27 20:18:13,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 208 transitions, 2029 flow [2024-06-27 20:18:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:13,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:18:13,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-27 20:18:13,401 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 1659 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:18:13,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 208 transitions, 2029 flow [2024-06-27 20:18:13,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 208 transitions, 1871 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:13,721 INFO L231 Difference]: Finished difference. Result has 166 places, 199 transitions, 1529 flow [2024-06-27 20:18:13,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1529, PETRI_PLACES=166, PETRI_TRANSITIONS=199} [2024-06-27 20:18:13,722 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-27 20:18:13,722 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 199 transitions, 1529 flow [2024-06-27 20:18:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:13,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:13,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:13,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:18:13,723 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)] === [2024-06-27 20:18:13,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash 505769850, now seen corresponding path program 1 times [2024-06-27 20:18:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031506009] [2024-06-27 20:18:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031506009] [2024-06-27 20:18:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031506009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:14,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:14,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:14,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872897461] [2024-06-27 20:18:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:14,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:14,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:14,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:14,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:14,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 199 transitions, 1529 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:14,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:14,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:14,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:15,307 INFO L124 PetriNetUnfolderBase]: 3171/4819 cut-off events. [2024-06-27 20:18:15,308 INFO L125 PetriNetUnfolderBase]: For 563280/563280 co-relation queries the response was YES. [2024-06-27 20:18:15,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42640 conditions, 4819 events. 3171/4819 cut-off events. For 563280/563280 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 24382 event pairs, 961 based on Foata normal form. 1/4818 useless extension candidates. Maximal degree in co-relation 42563. Up to 4516 conditions per place. [2024-06-27 20:18:15,349 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 179 selfloop transitions, 16 changer transitions 0/218 dead transitions. [2024-06-27 20:18:15,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 218 transitions, 2141 flow [2024-06-27 20:18:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 20:18:15,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:18:15,350 INFO L175 Difference]: Start difference. First operand has 166 places, 199 transitions, 1529 flow. Second operand 6 states and 114 transitions. [2024-06-27 20:18:15,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 218 transitions, 2141 flow [2024-06-27 20:18:15,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 218 transitions, 2103 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:15,632 INFO L231 Difference]: Finished difference. Result has 167 places, 205 transitions, 1619 flow [2024-06-27 20:18:15,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1619, PETRI_PLACES=167, PETRI_TRANSITIONS=205} [2024-06-27 20:18:15,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-27 20:18:15,633 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 205 transitions, 1619 flow [2024-06-27 20:18:15,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:15,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:15,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:15,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:18:15,634 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)] === [2024-06-27 20:18:15,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2030048220, now seen corresponding path program 2 times [2024-06-27 20:18:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:15,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414761783] [2024-06-27 20:18:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:15,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:16,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:16,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414761783] [2024-06-27 20:18:16,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414761783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:16,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:16,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:18:16,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845230550] [2024-06-27 20:18:16,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:18:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:18:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:18:16,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:16,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 205 transitions, 1619 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:16,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:16,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:16,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:17,205 INFO L124 PetriNetUnfolderBase]: 3168/4816 cut-off events. [2024-06-27 20:18:17,205 INFO L125 PetriNetUnfolderBase]: For 582653/582656 co-relation queries the response was YES. [2024-06-27 20:18:17,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43333 conditions, 4816 events. 3168/4816 cut-off events. For 582653/582656 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 24372 event pairs, 964 based on Foata normal form. 3/4816 useless extension candidates. Maximal degree in co-relation 43255. Up to 4513 conditions per place. [2024-06-27 20:18:17,245 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 175 selfloop transitions, 16 changer transitions 0/214 dead transitions. [2024-06-27 20:18:17,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 214 transitions, 2023 flow [2024-06-27 20:18:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:18:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:18:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:18:17,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:18:17,246 INFO L175 Difference]: Start difference. First operand has 167 places, 205 transitions, 1619 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:18:17,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 214 transitions, 2023 flow [2024-06-27 20:18:17,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 214 transitions, 1951 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-27 20:18:17,631 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 1585 flow [2024-06-27 20:18:17,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1585, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-06-27 20:18:17,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-27 20:18:17,632 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 1585 flow [2024-06-27 20:18:17,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:17,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:17,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:18:17,632 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:17,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1502539252, now seen corresponding path program 1 times [2024-06-27 20:18:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:17,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3382704] [2024-06-27 20:18:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3382704] [2024-06-27 20:18:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3382704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:18,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:18:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049543443] [2024-06-27 20:18:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:18,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:18:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:18:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:18:18,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:18:18,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:18,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:18,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:18:18,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:19,894 INFO L124 PetriNetUnfolderBase]: 3299/4940 cut-off events. [2024-06-27 20:18:19,894 INFO L125 PetriNetUnfolderBase]: For 605486/605486 co-relation queries the response was YES. [2024-06-27 20:18:19,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44605 conditions, 4940 events. 3299/4940 cut-off events. For 605486/605486 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 24377 event pairs, 948 based on Foata normal form. 4/4941 useless extension candidates. Maximal degree in co-relation 44525. Up to 4725 conditions per place. [2024-06-27 20:18:19,935 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 212 selfloop transitions, 21 changer transitions 0/238 dead transitions. [2024-06-27 20:18:19,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 238 transitions, 2213 flow [2024-06-27 20:18:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:18:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:18:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:18:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-27 20:18:19,936 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 1585 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:18:19,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 238 transitions, 2213 flow [2024-06-27 20:18:20,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 238 transitions, 2169 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:20,267 INFO L231 Difference]: Finished difference. Result has 176 places, 210 transitions, 1692 flow [2024-06-27 20:18:20,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1692, PETRI_PLACES=176, PETRI_TRANSITIONS=210} [2024-06-27 20:18:20,268 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-27 20:18:20,268 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 210 transitions, 1692 flow [2024-06-27 20:18:20,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:20,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:20,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:20,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:18:20,269 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)] === [2024-06-27 20:18:20,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1981796720, now seen corresponding path program 1 times [2024-06-27 20:18:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:20,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125949727] [2024-06-27 20:18:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:20,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:20,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125949727] [2024-06-27 20:18:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125949727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:20,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:20,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783963545] [2024-06-27 20:18:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:20,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:21,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:21,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 210 transitions, 1692 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:21,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:21,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:21,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:21,980 INFO L124 PetriNetUnfolderBase]: 3062/4665 cut-off events. [2024-06-27 20:18:21,980 INFO L125 PetriNetUnfolderBase]: For 618924/618936 co-relation queries the response was YES. [2024-06-27 20:18:22,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43587 conditions, 4665 events. 3062/4665 cut-off events. For 618924/618936 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23510 event pairs, 963 based on Foata normal form. 11/4650 useless extension candidates. Maximal degree in co-relation 43505. Up to 4425 conditions per place. [2024-06-27 20:18:22,024 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 179 selfloop transitions, 14 changer transitions 0/225 dead transitions. [2024-06-27 20:18:22,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 225 transitions, 2142 flow [2024-06-27 20:18:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:22,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:18:22,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 20:18:22,025 INFO L175 Difference]: Start difference. First operand has 176 places, 210 transitions, 1692 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:18:22,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 225 transitions, 2142 flow [2024-06-27 20:18:22,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 225 transitions, 2035 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:22,380 INFO L231 Difference]: Finished difference. Result has 177 places, 213 transitions, 1661 flow [2024-06-27 20:18:22,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1661, PETRI_PLACES=177, PETRI_TRANSITIONS=213} [2024-06-27 20:18:22,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-27 20:18:22,381 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 213 transitions, 1661 flow [2024-06-27 20:18:22,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:22,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:22,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:18:22,382 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:22,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash -443737642, now seen corresponding path program 1 times [2024-06-27 20:18:22,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:22,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457235928] [2024-06-27 20:18:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:22,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457235928] [2024-06-27 20:18:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457235928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202191194] [2024-06-27 20:18:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 213 transitions, 1661 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:24,754 INFO L124 PetriNetUnfolderBase]: 3142/4779 cut-off events. [2024-06-27 20:18:24,754 INFO L125 PetriNetUnfolderBase]: For 633861/633861 co-relation queries the response was YES. [2024-06-27 20:18:24,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45280 conditions, 4779 events. 3142/4779 cut-off events. For 633861/633861 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 24549 event pairs, 669 based on Foata normal form. 4/4778 useless extension candidates. Maximal degree in co-relation 45197. Up to 4302 conditions per place. [2024-06-27 20:18:24,800 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 224 selfloop transitions, 35 changer transitions 0/266 dead transitions. [2024-06-27 20:18:24,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 266 transitions, 2679 flow [2024-06-27 20:18:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:18:24,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 20:18:24,801 INFO L175 Difference]: Start difference. First operand has 177 places, 213 transitions, 1661 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:18:24,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 266 transitions, 2679 flow [2024-06-27 20:18:25,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 266 transitions, 2625 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:25,207 INFO L231 Difference]: Finished difference. Result has 183 places, 217 transitions, 1852 flow [2024-06-27 20:18:25,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1852, PETRI_PLACES=183, PETRI_TRANSITIONS=217} [2024-06-27 20:18:25,207 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-27 20:18:25,207 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 217 transitions, 1852 flow [2024-06-27 20:18:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:25,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:25,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:25,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:18:25,208 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:25,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash -512417854, now seen corresponding path program 2 times [2024-06-27 20:18:25,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:25,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880121805] [2024-06-27 20:18:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:26,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:26,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880121805] [2024-06-27 20:18:26,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880121805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:26,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:26,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935871602] [2024-06-27 20:18:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:26,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:26,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:26,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:26,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 217 transitions, 1852 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:26,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:26,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:26,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:27,581 INFO L124 PetriNetUnfolderBase]: 3195/4861 cut-off events. [2024-06-27 20:18:27,581 INFO L125 PetriNetUnfolderBase]: For 667345/667345 co-relation queries the response was YES. [2024-06-27 20:18:27,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46876 conditions, 4861 events. 3195/4861 cut-off events. For 667345/667345 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 25066 event pairs, 833 based on Foata normal form. 4/4860 useless extension candidates. Maximal degree in co-relation 46792. Up to 4471 conditions per place. [2024-06-27 20:18:27,631 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 230 selfloop transitions, 35 changer transitions 0/272 dead transitions. [2024-06-27 20:18:27,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 272 transitions, 2910 flow [2024-06-27 20:18:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:18:27,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 20:18:27,632 INFO L175 Difference]: Start difference. First operand has 183 places, 217 transitions, 1852 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:18:27,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 272 transitions, 2910 flow [2024-06-27 20:18:28,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 272 transitions, 2746 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:28,182 INFO L231 Difference]: Finished difference. Result has 187 places, 224 transitions, 1959 flow [2024-06-27 20:18:28,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1959, PETRI_PLACES=187, PETRI_TRANSITIONS=224} [2024-06-27 20:18:28,183 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-27 20:18:28,183 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 224 transitions, 1959 flow [2024-06-27 20:18:28,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:28,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:28,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:28,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:18:28,184 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:28,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1402643406, now seen corresponding path program 3 times [2024-06-27 20:18:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917930283] [2024-06-27 20:18:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:29,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917930283] [2024-06-27 20:18:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917930283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892168094] [2024-06-27 20:18:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:29,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:29,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 224 transitions, 1959 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:29,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:29,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:29,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:30,619 INFO L124 PetriNetUnfolderBase]: 3204/4876 cut-off events. [2024-06-27 20:18:30,619 INFO L125 PetriNetUnfolderBase]: For 690950/690950 co-relation queries the response was YES. [2024-06-27 20:18:30,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46938 conditions, 4876 events. 3204/4876 cut-off events. For 690950/690950 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 25187 event pairs, 841 based on Foata normal form. 8/4879 useless extension candidates. Maximal degree in co-relation 46852. Up to 4515 conditions per place. [2024-06-27 20:18:30,670 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 232 selfloop transitions, 36 changer transitions 0/275 dead transitions. [2024-06-27 20:18:30,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 275 transitions, 2693 flow [2024-06-27 20:18:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:18:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:18:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-27 20:18:30,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-27 20:18:30,672 INFO L175 Difference]: Start difference. First operand has 187 places, 224 transitions, 1959 flow. Second operand 12 states and 226 transitions. [2024-06-27 20:18:30,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 275 transitions, 2693 flow [2024-06-27 20:18:31,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 275 transitions, 2551 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 20:18:31,174 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 1977 flow [2024-06-27 20:18:31,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1977, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-27 20:18:31,174 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-27 20:18:31,174 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 1977 flow [2024-06-27 20:18:31,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:31,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:31,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:18:31,175 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:31,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1402643561, now seen corresponding path program 1 times [2024-06-27 20:18:31,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:31,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932803939] [2024-06-27 20:18:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:32,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932803939] [2024-06-27 20:18:32,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932803939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:32,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:32,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440070075] [2024-06-27 20:18:32,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:32,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:32,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:32,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:32,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 1977 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:32,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:32,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:32,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:33,600 INFO L124 PetriNetUnfolderBase]: 3233/4920 cut-off events. [2024-06-27 20:18:33,600 INFO L125 PetriNetUnfolderBase]: For 709220/709220 co-relation queries the response was YES. [2024-06-27 20:18:33,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47541 conditions, 4920 events. 3233/4920 cut-off events. For 709220/709220 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 25458 event pairs, 830 based on Foata normal form. 4/4919 useless extension candidates. Maximal degree in co-relation 47453. Up to 4539 conditions per place. [2024-06-27 20:18:33,650 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 238 selfloop transitions, 38 changer transitions 0/283 dead transitions. [2024-06-27 20:18:33,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 283 transitions, 2763 flow [2024-06-27 20:18:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:18:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:18:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 245 transitions. [2024-06-27 20:18:33,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42832167832167833 [2024-06-27 20:18:33,652 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 1977 flow. Second operand 13 states and 245 transitions. [2024-06-27 20:18:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 283 transitions, 2763 flow [2024-06-27 20:18:34,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 283 transitions, 2633 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-27 20:18:34,030 INFO L231 Difference]: Finished difference. Result has 197 places, 229 transitions, 2033 flow [2024-06-27 20:18:34,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2033, PETRI_PLACES=197, PETRI_TRANSITIONS=229} [2024-06-27 20:18:34,031 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-27 20:18:34,031 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 229 transitions, 2033 flow [2024-06-27 20:18:34,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:34,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:34,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:18:34,031 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:34,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1489331496, now seen corresponding path program 4 times [2024-06-27 20:18:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:34,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539698332] [2024-06-27 20:18:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:34,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:35,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:35,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539698332] [2024-06-27 20:18:35,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539698332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:35,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:35,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:35,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141499704] [2024-06-27 20:18:35,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:35,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:35,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:35,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:35,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:35,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 229 transitions, 2033 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:35,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:35,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:35,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:36,402 INFO L124 PetriNetUnfolderBase]: 3225/4908 cut-off events. [2024-06-27 20:18:36,402 INFO L125 PetriNetUnfolderBase]: For 723749/723749 co-relation queries the response was YES. [2024-06-27 20:18:36,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47814 conditions, 4908 events. 3225/4908 cut-off events. For 723749/723749 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 25368 event pairs, 827 based on Foata normal form. 4/4907 useless extension candidates. Maximal degree in co-relation 47725. Up to 4552 conditions per place. [2024-06-27 20:18:36,451 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 27 changer transitions 0/268 dead transitions. [2024-06-27 20:18:36,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 268 transitions, 2653 flow [2024-06-27 20:18:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:18:36,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 20:18:36,453 INFO L175 Difference]: Start difference. First operand has 197 places, 229 transitions, 2033 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:18:36,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 268 transitions, 2653 flow [2024-06-27 20:18:36,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 268 transitions, 2437 flow, removed 73 selfloop flow, removed 11 redundant places. [2024-06-27 20:18:36,872 INFO L231 Difference]: Finished difference. Result has 196 places, 229 transitions, 1878 flow [2024-06-27 20:18:36,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1878, PETRI_PLACES=196, PETRI_TRANSITIONS=229} [2024-06-27 20:18:36,872 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-27 20:18:36,873 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 229 transitions, 1878 flow [2024-06-27 20:18:36,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:36,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:36,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:36,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:18:36,873 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:36,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1070602503, now seen corresponding path program 2 times [2024-06-27 20:18:36,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:36,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473731177] [2024-06-27 20:18:36,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:37,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:37,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473731177] [2024-06-27 20:18:37,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473731177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:37,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:37,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:37,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251731446] [2024-06-27 20:18:37,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:37,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:37,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:37,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:38,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:38,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 229 transitions, 1878 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:38,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:38,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:39,216 INFO L124 PetriNetUnfolderBase]: 3294/5019 cut-off events. [2024-06-27 20:18:39,217 INFO L125 PetriNetUnfolderBase]: For 766318/766321 co-relation queries the response was YES. [2024-06-27 20:18:39,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49225 conditions, 5019 events. 3294/5019 cut-off events. For 766318/766321 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 26151 event pairs, 783 based on Foata normal form. 4/5020 useless extension candidates. Maximal degree in co-relation 49135. Up to 4247 conditions per place. [2024-06-27 20:18:39,264 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 180 selfloop transitions, 94 changer transitions 0/281 dead transitions. [2024-06-27 20:18:39,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 281 transitions, 2984 flow [2024-06-27 20:18:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 20:18:39,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-27 20:18:39,265 INFO L175 Difference]: Start difference. First operand has 196 places, 229 transitions, 1878 flow. Second operand 11 states and 223 transitions. [2024-06-27 20:18:39,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 281 transitions, 2984 flow [2024-06-27 20:18:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 281 transitions, 2878 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:39,657 INFO L231 Difference]: Finished difference. Result has 198 places, 235 transitions, 2175 flow [2024-06-27 20:18:39,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2175, PETRI_PLACES=198, PETRI_TRANSITIONS=235} [2024-06-27 20:18:39,658 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-27 20:18:39,658 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 235 transitions, 2175 flow [2024-06-27 20:18:39,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:39,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:39,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:39,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:18:39,658 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:39,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1070602658, now seen corresponding path program 5 times [2024-06-27 20:18:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096967756] [2024-06-27 20:18:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:40,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:40,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096967756] [2024-06-27 20:18:40,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096967756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:40,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:40,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:40,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044735677] [2024-06-27 20:18:40,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:40,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:40,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:40,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:40,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 235 transitions, 2175 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:40,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:40,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:40,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:42,002 INFO L124 PetriNetUnfolderBase]: 3296/5019 cut-off events. [2024-06-27 20:18:42,002 INFO L125 PetriNetUnfolderBase]: For 786087/786090 co-relation queries the response was YES. [2024-06-27 20:18:42,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50077 conditions, 5019 events. 3296/5019 cut-off events. For 786087/786090 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 26143 event pairs, 852 based on Foata normal form. 4/5017 useless extension candidates. Maximal degree in co-relation 49987. Up to 4586 conditions per place. [2024-06-27 20:18:42,054 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 210 selfloop transitions, 55 changer transitions 0/272 dead transitions. [2024-06-27 20:18:42,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 272 transitions, 2883 flow [2024-06-27 20:18:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:18:42,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 20:18:42,056 INFO L175 Difference]: Start difference. First operand has 198 places, 235 transitions, 2175 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:18:42,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 272 transitions, 2883 flow [2024-06-27 20:18:42,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 272 transitions, 2670 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 20:18:42,615 INFO L231 Difference]: Finished difference. Result has 201 places, 237 transitions, 2173 flow [2024-06-27 20:18:42,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2173, PETRI_PLACES=201, PETRI_TRANSITIONS=237} [2024-06-27 20:18:42,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-27 20:18:42,616 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 237 transitions, 2173 flow [2024-06-27 20:18:42,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:42,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:42,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:42,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:18:42,616 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:42,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:42,617 INFO L85 PathProgramCache]: Analyzing trace with hash 768390470, now seen corresponding path program 6 times [2024-06-27 20:18:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856800141] [2024-06-27 20:18:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:43,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856800141] [2024-06-27 20:18:43,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856800141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:43,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:43,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:43,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442714783] [2024-06-27 20:18:43,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:43,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:43,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:43,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:43,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:43,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 237 transitions, 2173 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:43,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:43,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:43,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:44,919 INFO L124 PetriNetUnfolderBase]: 3338/5085 cut-off events. [2024-06-27 20:18:44,919 INFO L125 PetriNetUnfolderBase]: For 820864/820867 co-relation queries the response was YES. [2024-06-27 20:18:44,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51474 conditions, 5085 events. 3338/5085 cut-off events. For 820864/820867 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 26608 event pairs, 849 based on Foata normal form. 4/5083 useless extension candidates. Maximal degree in co-relation 51382. Up to 4564 conditions per place. [2024-06-27 20:18:44,966 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 208 selfloop transitions, 64 changer transitions 0/279 dead transitions. [2024-06-27 20:18:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 3241 flow [2024-06-27 20:18:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:18:44,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:18:44,967 INFO L175 Difference]: Start difference. First operand has 201 places, 237 transitions, 2173 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:18:44,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 3241 flow [2024-06-27 20:18:45,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3048 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:45,498 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2307 flow [2024-06-27 20:18:45,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-27 20:18:45,498 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-27 20:18:45,499 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2307 flow [2024-06-27 20:18:45,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:45,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:45,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:18:45,499 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:45,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1075964883, now seen corresponding path program 3 times [2024-06-27 20:18:45,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:45,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755166898] [2024-06-27 20:18:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:45,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:46,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755166898] [2024-06-27 20:18:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755166898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:46,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813577350] [2024-06-27 20:18:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:46,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:46,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:46,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:46,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2307 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:46,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:46,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:48,057 INFO L124 PetriNetUnfolderBase]: 3371/5138 cut-off events. [2024-06-27 20:18:48,057 INFO L125 PetriNetUnfolderBase]: For 848197/848200 co-relation queries the response was YES. [2024-06-27 20:18:48,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52304 conditions, 5138 events. 3371/5138 cut-off events. For 848197/848200 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 26958 event pairs, 808 based on Foata normal form. 4/5136 useless extension candidates. Maximal degree in co-relation 52211. Up to 4391 conditions per place. [2024-06-27 20:18:48,108 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 193 selfloop transitions, 90 changer transitions 0/290 dead transitions. [2024-06-27 20:18:48,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 290 transitions, 3117 flow [2024-06-27 20:18:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:48,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 20:18:48,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:48,110 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2307 flow. Second operand 11 states and 220 transitions. [2024-06-27 20:18:48,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 290 transitions, 3117 flow [2024-06-27 20:18:48,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 290 transitions, 2933 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:18:48,629 INFO L231 Difference]: Finished difference. Result has 209 places, 247 transitions, 2456 flow [2024-06-27 20:18:48,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2456, PETRI_PLACES=209, PETRI_TRANSITIONS=247} [2024-06-27 20:18:48,629 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-27 20:18:48,629 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 247 transitions, 2456 flow [2024-06-27 20:18:48,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:48,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:48,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:48,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:18:48,630 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:48,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1419591661, now seen corresponding path program 4 times [2024-06-27 20:18:48,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:48,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407513360] [2024-06-27 20:18:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:48,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:49,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407513360] [2024-06-27 20:18:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407513360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261747916] [2024-06-27 20:18:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:49,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:49,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 247 transitions, 2456 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:49,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:49,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:49,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:50,905 INFO L124 PetriNetUnfolderBase]: 3361/5119 cut-off events. [2024-06-27 20:18:50,906 INFO L125 PetriNetUnfolderBase]: For 862941/862944 co-relation queries the response was YES. [2024-06-27 20:18:50,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52752 conditions, 5119 events. 3361/5119 cut-off events. For 862941/862944 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26836 event pairs, 808 based on Foata normal form. 4/5117 useless extension candidates. Maximal degree in co-relation 52656. Up to 4391 conditions per place. [2024-06-27 20:18:50,954 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 188 selfloop transitions, 90 changer transitions 0/285 dead transitions. [2024-06-27 20:18:50,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 285 transitions, 3114 flow [2024-06-27 20:18:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:18:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:18:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:18:50,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:50,955 INFO L175 Difference]: Start difference. First operand has 209 places, 247 transitions, 2456 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:18:50,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 285 transitions, 3114 flow [2024-06-27 20:18:51,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 285 transitions, 2769 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-27 20:18:51,463 INFO L231 Difference]: Finished difference. Result has 211 places, 247 transitions, 2299 flow [2024-06-27 20:18:51,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2299, PETRI_PLACES=211, PETRI_TRANSITIONS=247} [2024-06-27 20:18:51,463 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-27 20:18:51,463 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 247 transitions, 2299 flow [2024-06-27 20:18:51,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:51,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:51,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:51,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:18:51,464 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:51,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash -921295367, now seen corresponding path program 5 times [2024-06-27 20:18:51,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919729391] [2024-06-27 20:18:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:52,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919729391] [2024-06-27 20:18:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919729391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:52,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741664839] [2024-06-27 20:18:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:52,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:52,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 247 transitions, 2299 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:52,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:52,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:52,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:54,133 INFO L124 PetriNetUnfolderBase]: 3383/5156 cut-off events. [2024-06-27 20:18:54,133 INFO L125 PetriNetUnfolderBase]: For 886465/886468 co-relation queries the response was YES. [2024-06-27 20:18:54,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53066 conditions, 5156 events. 3383/5156 cut-off events. For 886465/886468 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 27049 event pairs, 808 based on Foata normal form. 4/5154 useless extension candidates. Maximal degree in co-relation 52969. Up to 4313 conditions per place. [2024-06-27 20:18:54,181 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 184 selfloop transitions, 107 changer transitions 0/298 dead transitions. [2024-06-27 20:18:54,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 298 transitions, 3127 flow [2024-06-27 20:18:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:18:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:18:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-27 20:18:54,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:18:54,183 INFO L175 Difference]: Start difference. First operand has 211 places, 247 transitions, 2299 flow. Second operand 12 states and 240 transitions. [2024-06-27 20:18:54,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 298 transitions, 3127 flow [2024-06-27 20:18:54,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 298 transitions, 2939 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:18:54,626 INFO L231 Difference]: Finished difference. Result has 214 places, 250 transitions, 2460 flow [2024-06-27 20:18:54,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2460, PETRI_PLACES=214, PETRI_TRANSITIONS=250} [2024-06-27 20:18:54,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-27 20:18:54,626 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 250 transitions, 2460 flow [2024-06-27 20:18:54,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:54,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:54,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:18:54,627 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:18:54,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1076109188, now seen corresponding path program 7 times [2024-06-27 20:18:54,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:54,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861445764] [2024-06-27 20:18:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:55,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:55,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861445764] [2024-06-27 20:18:55,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861445764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:55,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:55,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:18:55,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858712695] [2024-06-27 20:18:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:18:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:18:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:18:55,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:55,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 250 transitions, 2460 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:55,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:55,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:55,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:57,142 INFO L124 PetriNetUnfolderBase]: 3358/5117 cut-off events. [2024-06-27 20:18:57,142 INFO L125 PetriNetUnfolderBase]: For 905702/905705 co-relation queries the response was YES. [2024-06-27 20:18:57,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53447 conditions, 5117 events. 3358/5117 cut-off events. For 905702/905705 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 26872 event pairs, 896 based on Foata normal form. 4/5115 useless extension candidates. Maximal degree in co-relation 53349. Up to 4652 conditions per place. [2024-06-27 20:18:57,195 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 219 selfloop transitions, 63 changer transitions 0/289 dead transitions. [2024-06-27 20:18:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 289 transitions, 3122 flow [2024-06-27 20:18:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:18:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:18:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:18:57,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 20:18:57,196 INFO L175 Difference]: Start difference. First operand has 214 places, 250 transitions, 2460 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:18:57,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 289 transitions, 3122 flow [2024-06-27 20:18:57,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 289 transitions, 2743 flow, removed 87 selfloop flow, removed 10 redundant places. [2024-06-27 20:18:57,712 INFO L231 Difference]: Finished difference. Result has 215 places, 250 transitions, 2215 flow [2024-06-27 20:18:57,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2215, PETRI_PLACES=215, PETRI_TRANSITIONS=250} [2024-06-27 20:18:57,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 20:18:57,712 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 250 transitions, 2215 flow [2024-06-27 20:18:57,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:18:57,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:18:57,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:18:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:18:57,713 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)] === [2024-06-27 20:18:57,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:18:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1922592156, now seen corresponding path program 1 times [2024-06-27 20:18:57,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:18:57,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7403426] [2024-06-27 20:18:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:18:57,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:18:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:18:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:18:58,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:18:58,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7403426] [2024-06-27 20:18:58,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7403426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:18:58,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:18:58,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:18:58,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044956380] [2024-06-27 20:18:58,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:18:58,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:18:58,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:18:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:18:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:18:58,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:18:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 250 transitions, 2215 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:18:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:18:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:18:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:18:59,365 INFO L124 PetriNetUnfolderBase]: 3367/5136 cut-off events. [2024-06-27 20:18:59,365 INFO L125 PetriNetUnfolderBase]: For 910078/910090 co-relation queries the response was YES. [2024-06-27 20:18:59,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52339 conditions, 5136 events. 3367/5136 cut-off events. For 910078/910090 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 26661 event pairs, 975 based on Foata normal form. 10/5120 useless extension candidates. Maximal degree in co-relation 52240. Up to 4788 conditions per place. [2024-06-27 20:18:59,421 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 206 selfloop transitions, 25 changer transitions 0/273 dead transitions. [2024-06-27 20:18:59,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 273 transitions, 2935 flow [2024-06-27 20:18:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:18:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:18:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:18:59,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:18:59,422 INFO L175 Difference]: Start difference. First operand has 215 places, 250 transitions, 2215 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:18:59,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 273 transitions, 2935 flow [2024-06-27 20:19:00,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 273 transitions, 2797 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:19:00,194 INFO L231 Difference]: Finished difference. Result has 212 places, 256 transitions, 2219 flow [2024-06-27 20:19:00,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2219, PETRI_PLACES=212, PETRI_TRANSITIONS=256} [2024-06-27 20:19:00,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-27 20:19:00,194 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 256 transitions, 2219 flow [2024-06-27 20:19:00,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:00,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:00,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:19:00,195 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:00,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1629163799, now seen corresponding path program 6 times [2024-06-27 20:19:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789116325] [2024-06-27 20:19:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:01,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789116325] [2024-06-27 20:19:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789116325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:01,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:01,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295044799] [2024-06-27 20:19:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:01,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:01,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:01,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:01,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 256 transitions, 2219 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:01,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:01,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:01,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:02,550 INFO L124 PetriNetUnfolderBase]: 3426/5219 cut-off events. [2024-06-27 20:19:02,550 INFO L125 PetriNetUnfolderBase]: For 928025/928025 co-relation queries the response was YES. [2024-06-27 20:19:02,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53711 conditions, 5219 events. 3426/5219 cut-off events. For 928025/928025 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 27507 event pairs, 803 based on Foata normal form. 4/5221 useless extension candidates. Maximal degree in co-relation 53611. Up to 4487 conditions per place. [2024-06-27 20:19:02,617 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 219 selfloop transitions, 81 changer transitions 0/309 dead transitions. [2024-06-27 20:19:02,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 309 transitions, 4141 flow [2024-06-27 20:19:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:19:02,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-27 20:19:02,618 INFO L175 Difference]: Start difference. First operand has 212 places, 256 transitions, 2219 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:19:02,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 309 transitions, 4141 flow [2024-06-27 20:19:03,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 309 transitions, 4092 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:19:03,233 INFO L231 Difference]: Finished difference. Result has 221 places, 268 transitions, 2845 flow [2024-06-27 20:19:03,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2845, PETRI_PLACES=221, PETRI_TRANSITIONS=268} [2024-06-27 20:19:03,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-27 20:19:03,240 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 268 transitions, 2845 flow [2024-06-27 20:19:03,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:03,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:03,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:03,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:19:03,241 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:03,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:03,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1608384198, now seen corresponding path program 8 times [2024-06-27 20:19:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:03,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347075317] [2024-06-27 20:19:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:03,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347075317] [2024-06-27 20:19:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347075317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108862091] [2024-06-27 20:19:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:04,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 268 transitions, 2845 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:04,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:04,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:05,659 INFO L124 PetriNetUnfolderBase]: 3443/5246 cut-off events. [2024-06-27 20:19:05,659 INFO L125 PetriNetUnfolderBase]: For 962995/962995 co-relation queries the response was YES. [2024-06-27 20:19:05,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55743 conditions, 5246 events. 3443/5246 cut-off events. For 962995/962995 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 27654 event pairs, 825 based on Foata normal form. 4/5248 useless extension candidates. Maximal degree in co-relation 55639. Up to 4893 conditions per place. [2024-06-27 20:19:05,719 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 258 selfloop transitions, 35 changer transitions 0/302 dead transitions. [2024-06-27 20:19:05,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 302 transitions, 3613 flow [2024-06-27 20:19:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:19:05,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-27 20:19:05,720 INFO L175 Difference]: Start difference. First operand has 221 places, 268 transitions, 2845 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:19:05,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 302 transitions, 3613 flow [2024-06-27 20:19:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 302 transitions, 3419 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 20:19:06,648 INFO L231 Difference]: Finished difference. Result has 226 places, 270 transitions, 2834 flow [2024-06-27 20:19:06,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2834, PETRI_PLACES=226, PETRI_TRANSITIONS=270} [2024-06-27 20:19:06,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-27 20:19:06,649 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 270 transitions, 2834 flow [2024-06-27 20:19:06,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:06,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:06,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:06,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:19:06,649 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:06,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:06,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2114822914, now seen corresponding path program 9 times [2024-06-27 20:19:06,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:06,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075134563] [2024-06-27 20:19:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:06,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:07,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075134563] [2024-06-27 20:19:07,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075134563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:07,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:07,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:07,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806499303] [2024-06-27 20:19:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:07,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:07,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 270 transitions, 2834 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:07,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:07,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:07,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:09,015 INFO L124 PetriNetUnfolderBase]: 3468/5283 cut-off events. [2024-06-27 20:19:09,016 INFO L125 PetriNetUnfolderBase]: For 992423/992423 co-relation queries the response was YES. [2024-06-27 20:19:09,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56667 conditions, 5283 events. 3468/5283 cut-off events. For 992423/992423 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 27924 event pairs, 790 based on Foata normal form. 4/5283 useless extension candidates. Maximal degree in co-relation 56562. Up to 4822 conditions per place. [2024-06-27 20:19:09,082 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 249 selfloop transitions, 51 changer transitions 0/309 dead transitions. [2024-06-27 20:19:09,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 309 transitions, 4000 flow [2024-06-27 20:19:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:19:09,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:19:09,083 INFO L175 Difference]: Start difference. First operand has 226 places, 270 transitions, 2834 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:19:09,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 309 transitions, 4000 flow [2024-06-27 20:19:09,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 309 transitions, 3835 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:09,907 INFO L231 Difference]: Finished difference. Result has 228 places, 274 transitions, 2994 flow [2024-06-27 20:19:09,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2994, PETRI_PLACES=228, PETRI_TRANSITIONS=274} [2024-06-27 20:19:09,908 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-27 20:19:09,908 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 274 transitions, 2994 flow [2024-06-27 20:19:09,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:09,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:09,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:09,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:19:09,908 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:09,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash -729290906, now seen corresponding path program 10 times [2024-06-27 20:19:09,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:09,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198199061] [2024-06-27 20:19:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:11,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:11,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198199061] [2024-06-27 20:19:11,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198199061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:11,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:11,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:11,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028509529] [2024-06-27 20:19:11,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:11,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:11,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:11,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:11,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:11,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 274 transitions, 2994 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:11,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:11,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:11,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:12,470 INFO L124 PetriNetUnfolderBase]: 3485/5310 cut-off events. [2024-06-27 20:19:12,470 INFO L125 PetriNetUnfolderBase]: For 1021874/1021874 co-relation queries the response was YES. [2024-06-27 20:19:12,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57387 conditions, 5310 events. 3485/5310 cut-off events. For 1021874/1021874 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 28110 event pairs, 795 based on Foata normal form. 4/5310 useless extension candidates. Maximal degree in co-relation 57281. Up to 4906 conditions per place. [2024-06-27 20:19:12,530 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 254 selfloop transitions, 49 changer transitions 0/312 dead transitions. [2024-06-27 20:19:12,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 312 transitions, 3800 flow [2024-06-27 20:19:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-27 20:19:12,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214876033057851 [2024-06-27 20:19:12,531 INFO L175 Difference]: Start difference. First operand has 228 places, 274 transitions, 2994 flow. Second operand 11 states and 204 transitions. [2024-06-27 20:19:12,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 312 transitions, 3800 flow [2024-06-27 20:19:13,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 312 transitions, 3584 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:13,303 INFO L231 Difference]: Finished difference. Result has 233 places, 276 transitions, 3000 flow [2024-06-27 20:19:13,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3000, PETRI_PLACES=233, PETRI_TRANSITIONS=276} [2024-06-27 20:19:13,304 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-27 20:19:13,304 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 276 transitions, 3000 flow [2024-06-27 20:19:13,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:13,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:13,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:13,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:19:13,304 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:13,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1634877719, now seen corresponding path program 7 times [2024-06-27 20:19:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:13,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156076390] [2024-06-27 20:19:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:14,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:14,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156076390] [2024-06-27 20:19:14,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156076390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:14,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:14,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:14,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957406083] [2024-06-27 20:19:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:14,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:14,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:14,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 276 transitions, 3000 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:14,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:14,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:14,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:15,887 INFO L124 PetriNetUnfolderBase]: 3499/5332 cut-off events. [2024-06-27 20:19:15,888 INFO L125 PetriNetUnfolderBase]: For 1039121/1039121 co-relation queries the response was YES. [2024-06-27 20:19:15,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57429 conditions, 5332 events. 3499/5332 cut-off events. For 1039121/1039121 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 28224 event pairs, 820 based on Foata normal form. 4/5334 useless extension candidates. Maximal degree in co-relation 57321. Up to 4746 conditions per place. [2024-06-27 20:19:15,949 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 242 selfloop transitions, 65 changer transitions 0/316 dead transitions. [2024-06-27 20:19:15,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 316 transitions, 4082 flow [2024-06-27 20:19:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 20:19:15,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-27 20:19:15,950 INFO L175 Difference]: Start difference. First operand has 233 places, 276 transitions, 3000 flow. Second operand 10 states and 197 transitions. [2024-06-27 20:19:15,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 316 transitions, 4082 flow [2024-06-27 20:19:16,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 316 transitions, 3922 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:16,876 INFO L231 Difference]: Finished difference. Result has 234 places, 279 transitions, 3078 flow [2024-06-27 20:19:16,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2840, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3078, PETRI_PLACES=234, PETRI_TRANSITIONS=279} [2024-06-27 20:19:16,876 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-27 20:19:16,876 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 279 transitions, 3078 flow [2024-06-27 20:19:16,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:16,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:16,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:16,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:19:16,877 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:16,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1634670329, now seen corresponding path program 8 times [2024-06-27 20:19:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:16,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529776602] [2024-06-27 20:19:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529776602] [2024-06-27 20:19:17,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529776602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:17,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:17,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833044085] [2024-06-27 20:19:17,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:17,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:17,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:17,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:17,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:18,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:18,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 279 transitions, 3078 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:18,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:18,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:18,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:19,088 INFO L124 PetriNetUnfolderBase]: 3553/5415 cut-off events. [2024-06-27 20:19:19,088 INFO L125 PetriNetUnfolderBase]: For 1079220/1079220 co-relation queries the response was YES. [2024-06-27 20:19:19,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58927 conditions, 5415 events. 3553/5415 cut-off events. For 1079220/1079220 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 28788 event pairs, 820 based on Foata normal form. 4/5417 useless extension candidates. Maximal degree in co-relation 58818. Up to 4768 conditions per place. [2024-06-27 20:19:19,150 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 244 selfloop transitions, 72 changer transitions 0/325 dead transitions. [2024-06-27 20:19:19,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 325 transitions, 4576 flow [2024-06-27 20:19:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:19,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:19:19,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-27 20:19:19,151 INFO L175 Difference]: Start difference. First operand has 234 places, 279 transitions, 3078 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:19:19,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 325 transitions, 4576 flow [2024-06-27 20:19:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 325 transitions, 4399 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:20,055 INFO L231 Difference]: Finished difference. Result has 237 places, 285 transitions, 3259 flow [2024-06-27 20:19:20,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3259, PETRI_PLACES=237, PETRI_TRANSITIONS=285} [2024-06-27 20:19:20,055 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-27 20:19:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 285 transitions, 3259 flow [2024-06-27 20:19:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:20,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:20,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:20,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:19:20,055 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:20,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1634675909, now seen corresponding path program 9 times [2024-06-27 20:19:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:20,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224442051] [2024-06-27 20:19:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:21,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224442051] [2024-06-27 20:19:21,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224442051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:21,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:21,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820763697] [2024-06-27 20:19:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:21,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:21,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 285 transitions, 3259 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:21,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:21,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:21,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:22,553 INFO L124 PetriNetUnfolderBase]: 3526/5374 cut-off events. [2024-06-27 20:19:22,553 INFO L125 PetriNetUnfolderBase]: For 1094827/1094827 co-relation queries the response was YES. [2024-06-27 20:19:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58606 conditions, 5374 events. 3526/5374 cut-off events. For 1094827/1094827 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 28508 event pairs, 856 based on Foata normal form. 4/5376 useless extension candidates. Maximal degree in co-relation 58496. Up to 4801 conditions per place. [2024-06-27 20:19:22,615 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 250 selfloop transitions, 64 changer transitions 0/323 dead transitions. [2024-06-27 20:19:22,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 323 transitions, 4273 flow [2024-06-27 20:19:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:19:22,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 20:19:22,616 INFO L175 Difference]: Start difference. First operand has 237 places, 285 transitions, 3259 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:19:22,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 323 transitions, 4273 flow [2024-06-27 20:19:23,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 323 transitions, 4036 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-27 20:19:23,763 INFO L231 Difference]: Finished difference. Result has 241 places, 285 transitions, 3158 flow [2024-06-27 20:19:23,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3158, PETRI_PLACES=241, PETRI_TRANSITIONS=285} [2024-06-27 20:19:23,764 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-27 20:19:23,764 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 285 transitions, 3158 flow [2024-06-27 20:19:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:23,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:23,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:19:23,764 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:23,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1629313529, now seen corresponding path program 10 times [2024-06-27 20:19:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:23,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699533010] [2024-06-27 20:19:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:23,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:24,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:24,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699533010] [2024-06-27 20:19:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699533010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:24,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:24,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554177023] [2024-06-27 20:19:24,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:24,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:25,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:25,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 285 transitions, 3158 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:25,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:25,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:25,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:26,238 INFO L124 PetriNetUnfolderBase]: 3566/5436 cut-off events. [2024-06-27 20:19:26,238 INFO L125 PetriNetUnfolderBase]: For 1124534/1124534 co-relation queries the response was YES. [2024-06-27 20:19:26,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59651 conditions, 5436 events. 3566/5436 cut-off events. For 1124534/1124534 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 28985 event pairs, 771 based on Foata normal form. 4/5436 useless extension candidates. Maximal degree in co-relation 59539. Up to 4848 conditions per place. [2024-06-27 20:19:26,306 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 250 selfloop transitions, 68 changer transitions 0/327 dead transitions. [2024-06-27 20:19:26,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 327 transitions, 4578 flow [2024-06-27 20:19:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:19:26,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:19:26,307 INFO L175 Difference]: Start difference. First operand has 241 places, 285 transitions, 3158 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:19:26,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 327 transitions, 4578 flow [2024-06-27 20:19:27,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 327 transitions, 4463 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:27,137 INFO L231 Difference]: Finished difference. Result has 243 places, 288 transitions, 3299 flow [2024-06-27 20:19:27,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3299, PETRI_PLACES=243, PETRI_TRANSITIONS=288} [2024-06-27 20:19:27,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-27 20:19:27,138 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 288 transitions, 3299 flow [2024-06-27 20:19:27,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:27,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:27,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:27,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:19:27,138 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:27,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:27,139 INFO L85 PathProgramCache]: Analyzing trace with hash 366655993, now seen corresponding path program 1 times [2024-06-27 20:19:27,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:27,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489252482] [2024-06-27 20:19:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:27,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:28,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489252482] [2024-06-27 20:19:28,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489252482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:28,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:28,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038883083] [2024-06-27 20:19:28,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:28,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:28,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:28,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:28,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:19:28,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 288 transitions, 3299 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:28,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:28,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:19:28,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:29,464 INFO L124 PetriNetUnfolderBase]: 3881/5803 cut-off events. [2024-06-27 20:19:29,464 INFO L125 PetriNetUnfolderBase]: For 1162788/1162788 co-relation queries the response was YES. [2024-06-27 20:19:29,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62168 conditions, 5803 events. 3881/5803 cut-off events. For 1162788/1162788 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 29556 event pairs, 958 based on Foata normal form. 2/5803 useless extension candidates. Maximal degree in co-relation 62055. Up to 5572 conditions per place. [2024-06-27 20:19:29,531 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 287 selfloop transitions, 25 changer transitions 0/319 dead transitions. [2024-06-27 20:19:29,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 319 transitions, 4038 flow [2024-06-27 20:19:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:19:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:19:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:19:29,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-27 20:19:29,532 INFO L175 Difference]: Start difference. First operand has 243 places, 288 transitions, 3299 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:19:29,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 319 transitions, 4038 flow [2024-06-27 20:19:30,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 319 transitions, 3744 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:30,765 INFO L231 Difference]: Finished difference. Result has 244 places, 291 transitions, 3116 flow [2024-06-27 20:19:30,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3116, PETRI_PLACES=244, PETRI_TRANSITIONS=291} [2024-06-27 20:19:30,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-27 20:19:30,766 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 291 transitions, 3116 flow [2024-06-27 20:19:30,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:30,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:30,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:30,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:19:30,766 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:30,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 109671232, now seen corresponding path program 11 times [2024-06-27 20:19:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376208186] [2024-06-27 20:19:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:31,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376208186] [2024-06-27 20:19:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376208186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:31,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560424924] [2024-06-27 20:19:31,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:31,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:31,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:31,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:31,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 291 transitions, 3116 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:31,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:31,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:33,145 INFO L124 PetriNetUnfolderBase]: 3593/5479 cut-off events. [2024-06-27 20:19:33,145 INFO L125 PetriNetUnfolderBase]: For 1170030/1170030 co-relation queries the response was YES. [2024-06-27 20:19:33,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59738 conditions, 5479 events. 3593/5479 cut-off events. For 1170030/1170030 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 29226 event pairs, 855 based on Foata normal form. 4/5481 useless extension candidates. Maximal degree in co-relation 59624. Up to 5166 conditions per place. [2024-06-27 20:19:33,209 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 294 selfloop transitions, 22 changer transitions 0/325 dead transitions. [2024-06-27 20:19:33,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 325 transitions, 3912 flow [2024-06-27 20:19:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:19:33,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-27 20:19:33,211 INFO L175 Difference]: Start difference. First operand has 244 places, 291 transitions, 3116 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:19:33,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 325 transitions, 3912 flow [2024-06-27 20:19:34,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 325 transitions, 3830 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:34,678 INFO L231 Difference]: Finished difference. Result has 246 places, 293 transitions, 3173 flow [2024-06-27 20:19:34,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3173, PETRI_PLACES=246, PETRI_TRANSITIONS=293} [2024-06-27 20:19:34,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-27 20:19:34,679 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 293 transitions, 3173 flow [2024-06-27 20:19:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:34,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:34,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:34,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:19:34,679 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:34,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:34,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1608384353, now seen corresponding path program 11 times [2024-06-27 20:19:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:34,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209554240] [2024-06-27 20:19:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:34,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:35,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:35,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209554240] [2024-06-27 20:19:35,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209554240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:35,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:35,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601329284] [2024-06-27 20:19:35,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:35,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:35,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:35,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:35,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:35,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 293 transitions, 3173 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:35,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:35,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:35,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:37,111 INFO L124 PetriNetUnfolderBase]: 3635/5542 cut-off events. [2024-06-27 20:19:37,111 INFO L125 PetriNetUnfolderBase]: For 1208592/1208592 co-relation queries the response was YES. [2024-06-27 20:19:37,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60981 conditions, 5542 events. 3635/5542 cut-off events. For 1208592/1208592 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29710 event pairs, 825 based on Foata normal form. 4/5544 useless extension candidates. Maximal degree in co-relation 60866. Up to 4938 conditions per place. [2024-06-27 20:19:37,173 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 257 selfloop transitions, 69 changer transitions 0/335 dead transitions. [2024-06-27 20:19:37,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 335 transitions, 4041 flow [2024-06-27 20:19:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:19:37,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-27 20:19:37,175 INFO L175 Difference]: Start difference. First operand has 246 places, 293 transitions, 3173 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:19:37,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 335 transitions, 4041 flow [2024-06-27 20:19:38,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 335 transitions, 3924 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:38,228 INFO L231 Difference]: Finished difference. Result has 249 places, 296 transitions, 3324 flow [2024-06-27 20:19:38,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3324, PETRI_PLACES=249, PETRI_TRANSITIONS=296} [2024-06-27 20:19:38,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-27 20:19:38,229 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 296 transitions, 3324 flow [2024-06-27 20:19:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:38,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:38,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:38,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:19:38,229 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:38,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:38,229 INFO L85 PathProgramCache]: Analyzing trace with hash 668013075, now seen corresponding path program 12 times [2024-06-27 20:19:38,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:38,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461542739] [2024-06-27 20:19:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:39,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:39,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461542739] [2024-06-27 20:19:39,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461542739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:39,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:39,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107091252] [2024-06-27 20:19:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:39,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:39,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:39,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 296 transitions, 3324 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:39,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:39,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:39,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:40,695 INFO L124 PetriNetUnfolderBase]: 3648/5559 cut-off events. [2024-06-27 20:19:40,696 INFO L125 PetriNetUnfolderBase]: For 1238139/1238139 co-relation queries the response was YES. [2024-06-27 20:19:40,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61557 conditions, 5559 events. 3648/5559 cut-off events. For 1238139/1238139 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29785 event pairs, 855 based on Foata normal form. 6/5563 useless extension candidates. Maximal degree in co-relation 61441. Up to 5167 conditions per place. [2024-06-27 20:19:40,755 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 296 selfloop transitions, 28 changer transitions 0/333 dead transitions. [2024-06-27 20:19:40,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 333 transitions, 4180 flow [2024-06-27 20:19:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:19:40,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-27 20:19:40,757 INFO L175 Difference]: Start difference. First operand has 249 places, 296 transitions, 3324 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:19:40,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 333 transitions, 4180 flow [2024-06-27 20:19:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 3940 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:42,114 INFO L231 Difference]: Finished difference. Result has 250 places, 299 transitions, 3272 flow [2024-06-27 20:19:42,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3090, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3272, PETRI_PLACES=250, PETRI_TRANSITIONS=299} [2024-06-27 20:19:42,114 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-27 20:19:42,114 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 299 transitions, 3272 flow [2024-06-27 20:19:42,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:42,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:42,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:42,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:19:42,115 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:42,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash 109676967, now seen corresponding path program 13 times [2024-06-27 20:19:42,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:42,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346774168] [2024-06-27 20:19:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346774168] [2024-06-27 20:19:43,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346774168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:43,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:43,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262954564] [2024-06-27 20:19:43,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:43,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:43,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 299 transitions, 3272 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:43,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:43,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:43,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:44,410 INFO L124 PetriNetUnfolderBase]: 3670/5596 cut-off events. [2024-06-27 20:19:44,411 INFO L125 PetriNetUnfolderBase]: For 1231403/1231403 co-relation queries the response was YES. [2024-06-27 20:19:44,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61507 conditions, 5596 events. 3670/5596 cut-off events. For 1231403/1231403 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 29998 event pairs, 843 based on Foata normal form. 4/5598 useless extension candidates. Maximal degree in co-relation 61390. Up to 5107 conditions per place. [2024-06-27 20:19:44,481 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 281 selfloop transitions, 49 changer transitions 0/339 dead transitions. [2024-06-27 20:19:44,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 339 transitions, 4452 flow [2024-06-27 20:19:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:19:44,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 20:19:44,482 INFO L175 Difference]: Start difference. First operand has 250 places, 299 transitions, 3272 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:19:44,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 339 transitions, 4452 flow [2024-06-27 20:19:45,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 339 transitions, 4300 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 20:19:45,637 INFO L231 Difference]: Finished difference. Result has 252 places, 302 transitions, 3350 flow [2024-06-27 20:19:45,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3350, PETRI_PLACES=252, PETRI_TRANSITIONS=302} [2024-06-27 20:19:45,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-27 20:19:45,637 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 302 transitions, 3350 flow [2024-06-27 20:19:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:45,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:45,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:45,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:19:45,638 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:45,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:45,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1613746578, now seen corresponding path program 12 times [2024-06-27 20:19:45,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:45,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391979259] [2024-06-27 20:19:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:45,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:46,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391979259] [2024-06-27 20:19:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391979259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504901157] [2024-06-27 20:19:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:46,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:46,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:46,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 302 transitions, 3350 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:46,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:46,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:46,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:48,170 INFO L124 PetriNetUnfolderBase]: 3662/5584 cut-off events. [2024-06-27 20:19:48,170 INFO L125 PetriNetUnfolderBase]: For 1246395/1246395 co-relation queries the response was YES. [2024-06-27 20:19:48,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61165 conditions, 5584 events. 3662/5584 cut-off events. For 1246395/1246395 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29994 event pairs, 863 based on Foata normal form. 4/5586 useless extension candidates. Maximal degree in co-relation 61047. Up to 5221 conditions per place. [2024-06-27 20:19:48,240 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 291 selfloop transitions, 34 changer transitions 0/334 dead transitions. [2024-06-27 20:19:48,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 334 transitions, 4080 flow [2024-06-27 20:19:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:48,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:19:48,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:19:48,241 INFO L175 Difference]: Start difference. First operand has 252 places, 302 transitions, 3350 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:19:48,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 334 transitions, 4080 flow [2024-06-27 20:19:49,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 334 transitions, 3728 flow, removed 88 selfloop flow, removed 10 redundant places. [2024-06-27 20:19:49,676 INFO L231 Difference]: Finished difference. Result has 252 places, 302 transitions, 3073 flow [2024-06-27 20:19:49,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3073, PETRI_PLACES=252, PETRI_TRANSITIONS=302} [2024-06-27 20:19:49,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-27 20:19:49,676 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 302 transitions, 3073 flow [2024-06-27 20:19:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:49,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:49,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:19:49,677 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:49,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 109671387, now seen corresponding path program 14 times [2024-06-27 20:19:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:49,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370805096] [2024-06-27 20:19:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:50,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370805096] [2024-06-27 20:19:50,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370805096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:50,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:50,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:50,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438552016] [2024-06-27 20:19:50,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:50,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:50,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 302 transitions, 3073 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:50,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:50,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:50,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:52,425 INFO L124 PetriNetUnfolderBase]: 3700/5639 cut-off events. [2024-06-27 20:19:52,426 INFO L125 PetriNetUnfolderBase]: For 1279784/1279784 co-relation queries the response was YES. [2024-06-27 20:19:52,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61776 conditions, 5639 events. 3700/5639 cut-off events. For 1279784/1279784 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 30303 event pairs, 843 based on Foata normal form. 4/5641 useless extension candidates. Maximal degree in co-relation 61657. Up to 5086 conditions per place. [2024-06-27 20:19:52,494 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 288 selfloop transitions, 53 changer transitions 0/350 dead transitions. [2024-06-27 20:19:52,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 350 transitions, 4427 flow [2024-06-27 20:19:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:19:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:19:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 20:19:52,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-27 20:19:52,496 INFO L175 Difference]: Start difference. First operand has 252 places, 302 transitions, 3073 flow. Second operand 11 states and 211 transitions. [2024-06-27 20:19:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 350 transitions, 4427 flow [2024-06-27 20:19:53,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 350 transitions, 4333 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:19:53,780 INFO L231 Difference]: Finished difference. Result has 254 places, 308 transitions, 3351 flow [2024-06-27 20:19:53,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3351, PETRI_PLACES=254, PETRI_TRANSITIONS=308} [2024-06-27 20:19:53,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-27 20:19:53,781 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 308 transitions, 3351 flow [2024-06-27 20:19:53,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:53,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:19:53,781 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:19:53,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 109878777, now seen corresponding path program 15 times [2024-06-27 20:19:53,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:53,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669788919] [2024-06-27 20:19:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:54,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669788919] [2024-06-27 20:19:54,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669788919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:54,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:54,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:19:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543810369] [2024-06-27 20:19:54,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:54,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:19:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:19:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:19:55,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:55,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 308 transitions, 3351 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:55,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:55,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:55,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:56,298 INFO L124 PetriNetUnfolderBase]: 3690/5625 cut-off events. [2024-06-27 20:19:56,298 INFO L125 PetriNetUnfolderBase]: For 1297023/1297023 co-relation queries the response was YES. [2024-06-27 20:19:56,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61784 conditions, 5625 events. 3690/5625 cut-off events. For 1297023/1297023 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 30227 event pairs, 846 based on Foata normal form. 4/5627 useless extension candidates. Maximal degree in co-relation 61664. Up to 5136 conditions per place. [2024-06-27 20:19:56,368 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 290 selfloop transitions, 46 changer transitions 0/345 dead transitions. [2024-06-27 20:19:56,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 345 transitions, 4437 flow [2024-06-27 20:19:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:19:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:19:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:19:56,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 20:19:56,369 INFO L175 Difference]: Start difference. First operand has 254 places, 308 transitions, 3351 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:19:56,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 345 transitions, 4437 flow [2024-06-27 20:19:57,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 345 transitions, 4180 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-27 20:19:57,704 INFO L231 Difference]: Finished difference. Result has 257 places, 308 transitions, 3194 flow [2024-06-27 20:19:57,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3194, PETRI_PLACES=257, PETRI_TRANSITIONS=308} [2024-06-27 20:19:57,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-27 20:19:57,705 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 308 transitions, 3194 flow [2024-06-27 20:19:57,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 20:19:57,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:19:57,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:19:57,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:19:57,705 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)] === [2024-06-27 20:19:57,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:19:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1666296760, now seen corresponding path program 2 times [2024-06-27 20:19:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:19:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718675345] [2024-06-27 20:19:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:19:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:19:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:19:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:19:58,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:19:58,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718675345] [2024-06-27 20:19:58,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718675345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:19:58,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:19:58,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:19:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944074187] [2024-06-27 20:19:58,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:19:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:19:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:19:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:19:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:19:58,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:19:58,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 308 transitions, 3194 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:19:58,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:19:58,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:19:58,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:19:59,542 INFO L124 PetriNetUnfolderBase]: 3731/5686 cut-off events. [2024-06-27 20:19:59,542 INFO L125 PetriNetUnfolderBase]: For 1327677/1327697 co-relation queries the response was YES. [2024-06-27 20:19:59,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61726 conditions, 5686 events. 3731/5686 cut-off events. For 1327677/1327697 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 30204 event pairs, 1004 based on Foata normal form. 9/5658 useless extension candidates. Maximal degree in co-relation 61604. Up to 5341 conditions per place. [2024-06-27 20:19:59,619 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 254 selfloop transitions, 19 changer transitions 0/322 dead transitions. [2024-06-27 20:19:59,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 322 transitions, 3980 flow [2024-06-27 20:19:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:19:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:19:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:19:59,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-27 20:19:59,620 INFO L175 Difference]: Start difference. First operand has 257 places, 308 transitions, 3194 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:19:59,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 322 transitions, 3980 flow [2024-06-27 20:20:01,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 322 transitions, 3891 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:01,238 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 3195 flow [2024-06-27 20:20:01,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3195, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-27 20:20:01,239 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-27 20:20:01,239 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 3195 flow [2024-06-27 20:20:01,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:01,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:20:01,239 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)] === [2024-06-27 20:20:01,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1306140370, now seen corresponding path program 3 times [2024-06-27 20:20:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:01,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501689921] [2024-06-27 20:20:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501689921] [2024-06-27 20:20:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501689921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:01,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:01,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325878892] [2024-06-27 20:20:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:01,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:01,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:01,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:01,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:01,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:01,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 3195 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:01,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:01,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:01,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:03,169 INFO L124 PetriNetUnfolderBase]: 3728/5682 cut-off events. [2024-06-27 20:20:03,169 INFO L125 PetriNetUnfolderBase]: For 1352661/1352681 co-relation queries the response was YES. [2024-06-27 20:20:03,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61689 conditions, 5682 events. 3728/5682 cut-off events. For 1352661/1352681 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 30174 event pairs, 999 based on Foata normal form. 9/5654 useless extension candidates. Maximal degree in co-relation 61566. Up to 5344 conditions per place. [2024-06-27 20:20:03,235 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 258 selfloop transitions, 14 changer transitions 0/321 dead transitions. [2024-06-27 20:20:03,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 321 transitions, 3763 flow [2024-06-27 20:20:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:20:03,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-27 20:20:03,236 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 3195 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:20:03,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 321 transitions, 3763 flow [2024-06-27 20:20:04,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 321 transitions, 3657 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:04,655 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 3123 flow [2024-06-27 20:20:04,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3123, PETRI_PLACES=258, PETRI_TRANSITIONS=311} [2024-06-27 20:20:04,656 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-27 20:20:04,656 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 3123 flow [2024-06-27 20:20:04,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:04,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:04,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:04,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:20:04,656 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)] === [2024-06-27 20:20:04,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1501182576, now seen corresponding path program 1 times [2024-06-27 20:20:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:04,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668839878] [2024-06-27 20:20:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:05,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:05,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668839878] [2024-06-27 20:20:05,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668839878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:05,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:05,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954419836] [2024-06-27 20:20:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:05,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:05,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:05,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 311 transitions, 3123 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:05,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:05,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:05,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:06,899 INFO L124 PetriNetUnfolderBase]: 4030/6023 cut-off events. [2024-06-27 20:20:06,899 INFO L125 PetriNetUnfolderBase]: For 1379808/1379808 co-relation queries the response was YES. [2024-06-27 20:20:06,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64299 conditions, 6023 events. 4030/6023 cut-off events. For 1379808/1379808 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30883 event pairs, 973 based on Foata normal form. 1/6022 useless extension candidates. Maximal degree in co-relation 64175. Up to 5828 conditions per place. [2024-06-27 20:20:06,993 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 302 selfloop transitions, 24 changer transitions 0/334 dead transitions. [2024-06-27 20:20:06,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 334 transitions, 4109 flow [2024-06-27 20:20:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:20:06,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 20:20:06,994 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 3123 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:20:06,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 334 transitions, 4109 flow [2024-06-27 20:20:08,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 334 transitions, 4073 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:08,980 INFO L231 Difference]: Finished difference. Result has 259 places, 317 transitions, 3267 flow [2024-06-27 20:20:08,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3267, PETRI_PLACES=259, PETRI_TRANSITIONS=317} [2024-06-27 20:20:08,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-27 20:20:08,981 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 317 transitions, 3267 flow [2024-06-27 20:20:08,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:08,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:08,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:08,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:20:08,981 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)] === [2024-06-27 20:20:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1792403832, now seen corresponding path program 2 times [2024-06-27 20:20:08,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:08,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801257841] [2024-06-27 20:20:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:08,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:09,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:09,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801257841] [2024-06-27 20:20:09,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801257841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:09,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909056537] [2024-06-27 20:20:09,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:09,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:09,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:09,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 317 transitions, 3267 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:09,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:09,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:09,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:11,278 INFO L124 PetriNetUnfolderBase]: 4035/6030 cut-off events. [2024-06-27 20:20:11,278 INFO L125 PetriNetUnfolderBase]: For 1412139/1412139 co-relation queries the response was YES. [2024-06-27 20:20:11,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65136 conditions, 6030 events. 4035/6030 cut-off events. For 1412139/1412139 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30903 event pairs, 973 based on Foata normal form. 1/6029 useless extension candidates. Maximal degree in co-relation 65011. Up to 5834 conditions per place. [2024-06-27 20:20:11,359 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 300 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2024-06-27 20:20:11,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 334 transitions, 4193 flow [2024-06-27 20:20:11,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:20:11,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 20:20:11,360 INFO L175 Difference]: Start difference. First operand has 259 places, 317 transitions, 3267 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:20:11,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 334 transitions, 4193 flow [2024-06-27 20:20:12,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 334 transitions, 4105 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:12,804 INFO L231 Difference]: Finished difference. Result has 263 places, 320 transitions, 3303 flow [2024-06-27 20:20:12,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3187, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3303, PETRI_PLACES=263, PETRI_TRANSITIONS=320} [2024-06-27 20:20:12,805 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-27 20:20:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 320 transitions, 3303 flow [2024-06-27 20:20:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:12,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:12,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:12,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:20:12,806 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)] === [2024-06-27 20:20:12,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1501002838, now seen corresponding path program 1 times [2024-06-27 20:20:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:12,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963714426] [2024-06-27 20:20:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963714426] [2024-06-27 20:20:13,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963714426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:13,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:13,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695146515] [2024-06-27 20:20:13,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:13,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:13,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 320 transitions, 3303 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:13,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:13,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:13,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:14,963 INFO L124 PetriNetUnfolderBase]: 4037/6034 cut-off events. [2024-06-27 20:20:14,963 INFO L125 PetriNetUnfolderBase]: For 1433492/1433492 co-relation queries the response was YES. [2024-06-27 20:20:15,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64946 conditions, 6034 events. 4037/6034 cut-off events. For 1433492/1433492 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 30952 event pairs, 1036 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 64819. Up to 5749 conditions per place. [2024-06-27 20:20:15,035 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 278 selfloop transitions, 23 changer transitions 0/340 dead transitions. [2024-06-27 20:20:15,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 340 transitions, 4219 flow [2024-06-27 20:20:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:20:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 20:20:15,036 INFO L175 Difference]: Start difference. First operand has 263 places, 320 transitions, 3303 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:20:15,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 340 transitions, 4219 flow [2024-06-27 20:20:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 340 transitions, 4137 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:20:16,728 INFO L231 Difference]: Finished difference. Result has 266 places, 326 transitions, 3383 flow [2024-06-27 20:20:16,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=266, PETRI_TRANSITIONS=326} [2024-06-27 20:20:16,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-27 20:20:16,728 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 326 transitions, 3383 flow [2024-06-27 20:20:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:16,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:16,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:16,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:20:16,729 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)] === [2024-06-27 20:20:16,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1493013872, now seen corresponding path program 3 times [2024-06-27 20:20:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:16,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049488823] [2024-06-27 20:20:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049488823] [2024-06-27 20:20:17,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049488823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:17,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:17,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83834146] [2024-06-27 20:20:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:17,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:17,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:17,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 326 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:17,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:17,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:17,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:18,790 INFO L124 PetriNetUnfolderBase]: 4049/6046 cut-off events. [2024-06-27 20:20:18,790 INFO L125 PetriNetUnfolderBase]: For 1471477/1471480 co-relation queries the response was YES. [2024-06-27 20:20:18,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66269 conditions, 6046 events. 4049/6046 cut-off events. For 1471477/1471480 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30947 event pairs, 979 based on Foata normal form. 1/6044 useless extension candidates. Maximal degree in co-relation 66141. Up to 5848 conditions per place. [2024-06-27 20:20:18,870 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 300 selfloop transitions, 26 changer transitions 0/336 dead transitions. [2024-06-27 20:20:18,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 336 transitions, 4059 flow [2024-06-27 20:20:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:20:18,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-27 20:20:18,870 INFO L175 Difference]: Start difference. First operand has 266 places, 326 transitions, 3383 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:20:18,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 336 transitions, 4059 flow [2024-06-27 20:20:20,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 336 transitions, 3961 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 20:20:20,680 INFO L231 Difference]: Finished difference. Result has 270 places, 326 transitions, 3343 flow [2024-06-27 20:20:20,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3343, PETRI_PLACES=270, PETRI_TRANSITIONS=326} [2024-06-27 20:20:20,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-27 20:20:20,681 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 326 transitions, 3343 flow [2024-06-27 20:20:20,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:20,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:20,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:20,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:20:20,681 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)] === [2024-06-27 20:20:20,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1264827478, now seen corresponding path program 2 times [2024-06-27 20:20:20,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:20,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184564635] [2024-06-27 20:20:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:20,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:21,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:21,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184564635] [2024-06-27 20:20:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184564635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:21,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:21,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:21,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786270205] [2024-06-27 20:20:21,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:21,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:21,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:21,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 326 transitions, 3343 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:21,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:21,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:21,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:22,790 INFO L124 PetriNetUnfolderBase]: 4039/6038 cut-off events. [2024-06-27 20:20:22,790 INFO L125 PetriNetUnfolderBase]: For 1492114/1492117 co-relation queries the response was YES. [2024-06-27 20:20:22,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65914 conditions, 6038 events. 4039/6038 cut-off events. For 1492114/1492117 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 30963 event pairs, 1038 based on Foata normal form. 3/6038 useless extension candidates. Maximal degree in co-relation 65784. Up to 5752 conditions per place. [2024-06-27 20:20:22,868 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 275 selfloop transitions, 26 changer transitions 0/340 dead transitions. [2024-06-27 20:20:22,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 340 transitions, 4205 flow [2024-06-27 20:20:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:20:22,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:20:22,869 INFO L175 Difference]: Start difference. First operand has 270 places, 326 transitions, 3343 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:20:22,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 340 transitions, 4205 flow [2024-06-27 20:20:24,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 340 transitions, 4121 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:20:24,286 INFO L231 Difference]: Finished difference. Result has 270 places, 329 transitions, 3371 flow [2024-06-27 20:20:24,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3371, PETRI_PLACES=270, PETRI_TRANSITIONS=329} [2024-06-27 20:20:24,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-27 20:20:24,287 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 329 transitions, 3371 flow [2024-06-27 20:20:24,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:24,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:24,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:24,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:20:24,287 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)] === [2024-06-27 20:20:24,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1306146322, now seen corresponding path program 3 times [2024-06-27 20:20:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712211497] [2024-06-27 20:20:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:24,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:24,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712211497] [2024-06-27 20:20:24,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712211497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:24,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:24,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:20:24,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035032719] [2024-06-27 20:20:24,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:24,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:20:24,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:24,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:20:24,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:20:25,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:20:25,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 329 transitions, 3371 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:25,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:25,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:20:25,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:26,384 INFO L124 PetriNetUnfolderBase]: 4036/6034 cut-off events. [2024-06-27 20:20:26,384 INFO L125 PetriNetUnfolderBase]: For 1518584/1518587 co-relation queries the response was YES. [2024-06-27 20:20:26,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66112 conditions, 6034 events. 4036/6034 cut-off events. For 1518584/1518587 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30971 event pairs, 1038 based on Foata normal form. 3/6034 useless extension candidates. Maximal degree in co-relation 65981. Up to 5749 conditions per place. [2024-06-27 20:20:26,465 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 273 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-27 20:20:26,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 339 transitions, 3995 flow [2024-06-27 20:20:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:20:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:20:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:20:26,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-27 20:20:26,466 INFO L175 Difference]: Start difference. First operand has 270 places, 329 transitions, 3371 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:20:26,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 339 transitions, 3995 flow [2024-06-27 20:20:28,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 339 transitions, 3863 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 20:20:28,311 INFO L231 Difference]: Finished difference. Result has 272 places, 329 transitions, 3299 flow [2024-06-27 20:20:28,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3299, PETRI_PLACES=272, PETRI_TRANSITIONS=329} [2024-06-27 20:20:28,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-27 20:20:28,311 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 329 transitions, 3299 flow [2024-06-27 20:20:28,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:28,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:28,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:20:28,311 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:28,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 474066505, now seen corresponding path program 1 times [2024-06-27 20:20:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:28,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041969487] [2024-06-27 20:20:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:29,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:29,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041969487] [2024-06-27 20:20:29,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041969487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:29,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:29,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:29,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014398962] [2024-06-27 20:20:29,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:29,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:29,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:29,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:29,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 329 transitions, 3299 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:29,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:29,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:29,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:31,188 INFO L124 PetriNetUnfolderBase]: 3944/6027 cut-off events. [2024-06-27 20:20:31,188 INFO L125 PetriNetUnfolderBase]: For 1727513/1727513 co-relation queries the response was YES. [2024-06-27 20:20:31,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70755 conditions, 6027 events. 3944/6027 cut-off events. For 1727513/1727513 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32969 event pairs, 778 based on Foata normal form. 16/6029 useless extension candidates. Maximal degree in co-relation 70623. Up to 5088 conditions per place. [2024-06-27 20:20:31,265 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 337 selfloop transitions, 45 changer transitions 0/395 dead transitions. [2024-06-27 20:20:31,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 395 transitions, 4797 flow [2024-06-27 20:20:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-27 20:20:31,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 20:20:31,266 INFO L175 Difference]: Start difference. First operand has 272 places, 329 transitions, 3299 flow. Second operand 12 states and 244 transitions. [2024-06-27 20:20:31,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 395 transitions, 4797 flow [2024-06-27 20:20:32,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 395 transitions, 4733 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:20:32,905 INFO L231 Difference]: Finished difference. Result has 278 places, 331 transitions, 3489 flow [2024-06-27 20:20:32,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3489, PETRI_PLACES=278, PETRI_TRANSITIONS=331} [2024-06-27 20:20:32,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-27 20:20:32,906 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 331 transitions, 3489 flow [2024-06-27 20:20:32,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:32,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:32,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:32,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:20:32,906 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:32,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:32,906 INFO L85 PathProgramCache]: Analyzing trace with hash 532158955, now seen corresponding path program 2 times [2024-06-27 20:20:32,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:32,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062954316] [2024-06-27 20:20:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:32,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:34,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062954316] [2024-06-27 20:20:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062954316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:34,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:34,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007388806] [2024-06-27 20:20:34,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:34,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:34,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:34,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 331 transitions, 3489 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:34,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:34,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:34,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:35,916 INFO L124 PetriNetUnfolderBase]: 3990/6113 cut-off events. [2024-06-27 20:20:35,916 INFO L125 PetriNetUnfolderBase]: For 1761487/1761487 co-relation queries the response was YES. [2024-06-27 20:20:35,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71937 conditions, 6113 events. 3990/6113 cut-off events. For 1761487/1761487 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 33682 event pairs, 929 based on Foata normal form. 16/6119 useless extension candidates. Maximal degree in co-relation 71804. Up to 5248 conditions per place. [2024-06-27 20:20:35,995 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 338 selfloop transitions, 44 changer transitions 0/395 dead transitions. [2024-06-27 20:20:35,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 395 transitions, 4913 flow [2024-06-27 20:20:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:20:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:20:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 20:20:35,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:20:35,996 INFO L175 Difference]: Start difference. First operand has 278 places, 331 transitions, 3489 flow. Second operand 12 states and 242 transitions. [2024-06-27 20:20:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 395 transitions, 4913 flow [2024-06-27 20:20:37,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 395 transitions, 4792 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 20:20:37,663 INFO L231 Difference]: Finished difference. Result has 282 places, 332 transitions, 3543 flow [2024-06-27 20:20:37,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3543, PETRI_PLACES=282, PETRI_TRANSITIONS=332} [2024-06-27 20:20:37,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-27 20:20:37,664 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 332 transitions, 3543 flow [2024-06-27 20:20:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:37,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:37,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:20:37,664 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:37,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 532278925, now seen corresponding path program 3 times [2024-06-27 20:20:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383784721] [2024-06-27 20:20:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383784721] [2024-06-27 20:20:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383784721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:38,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672641013] [2024-06-27 20:20:38,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:39,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:39,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 332 transitions, 3543 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:39,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:39,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:39,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:40,824 INFO L124 PetriNetUnfolderBase]: 4032/6197 cut-off events. [2024-06-27 20:20:40,824 INFO L125 PetriNetUnfolderBase]: For 1806950/1806950 co-relation queries the response was YES. [2024-06-27 20:20:40,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71758 conditions, 6197 events. 4032/6197 cut-off events. For 1806950/1806950 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 34425 event pairs, 979 based on Foata normal form. 24/6211 useless extension candidates. Maximal degree in co-relation 71623. Up to 5618 conditions per place. [2024-06-27 20:20:40,899 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 345 selfloop transitions, 39 changer transitions 0/397 dead transitions. [2024-06-27 20:20:40,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 397 transitions, 4613 flow [2024-06-27 20:20:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:20:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:20:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 266 transitions. [2024-06-27 20:20:40,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 20:20:40,900 INFO L175 Difference]: Start difference. First operand has 282 places, 332 transitions, 3543 flow. Second operand 14 states and 266 transitions. [2024-06-27 20:20:40,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 397 transitions, 4613 flow [2024-06-27 20:20:43,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 397 transitions, 4470 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-27 20:20:43,064 INFO L231 Difference]: Finished difference. Result has 286 places, 333 transitions, 3562 flow [2024-06-27 20:20:43,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3562, PETRI_PLACES=286, PETRI_TRANSITIONS=333} [2024-06-27 20:20:43,064 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-27 20:20:43,064 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 333 transitions, 3562 flow [2024-06-27 20:20:43,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:43,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:43,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:43,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:20:43,065 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:20:43,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:43,065 INFO L85 PathProgramCache]: Analyzing trace with hash -812755595, now seen corresponding path program 4 times [2024-06-27 20:20:43,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:43,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050447562] [2024-06-27 20:20:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:43,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050447562] [2024-06-27 20:20:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050447562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:44,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:44,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:20:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128791532] [2024-06-27 20:20:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:44,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:20:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:20:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:20:44,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:44,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 333 transitions, 3562 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:44,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:44,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:44,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:46,272 INFO L124 PetriNetUnfolderBase]: 4004/6153 cut-off events. [2024-06-27 20:20:46,273 INFO L125 PetriNetUnfolderBase]: For 1741898/1741898 co-relation queries the response was YES. [2024-06-27 20:20:46,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69899 conditions, 6153 events. 4004/6153 cut-off events. For 1741898/1741898 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 34153 event pairs, 939 based on Foata normal form. 16/6159 useless extension candidates. Maximal degree in co-relation 69763. Up to 5436 conditions per place. [2024-06-27 20:20:46,348 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 343 selfloop transitions, 41 changer transitions 0/397 dead transitions. [2024-06-27 20:20:46,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 397 transitions, 4574 flow [2024-06-27 20:20:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:20:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:20:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 254 transitions. [2024-06-27 20:20:46,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44405594405594406 [2024-06-27 20:20:46,349 INFO L175 Difference]: Start difference. First operand has 286 places, 333 transitions, 3562 flow. Second operand 13 states and 254 transitions. [2024-06-27 20:20:46,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 397 transitions, 4574 flow [2024-06-27 20:20:48,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 397 transitions, 4460 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-27 20:20:48,950 INFO L231 Difference]: Finished difference. Result has 287 places, 333 transitions, 3537 flow [2024-06-27 20:20:48,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3537, PETRI_PLACES=287, PETRI_TRANSITIONS=333} [2024-06-27 20:20:48,951 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-27 20:20:48,951 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 333 transitions, 3537 flow [2024-06-27 20:20:48,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:48,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:48,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:48,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:20:48,951 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)] === [2024-06-27 20:20:48,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash -499718119, now seen corresponding path program 1 times [2024-06-27 20:20:48,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:48,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884276706] [2024-06-27 20:20:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:48,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:49,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:49,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884276706] [2024-06-27 20:20:49,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884276706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:49,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:49,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:49,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953499493] [2024-06-27 20:20:49,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:49,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:49,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:49,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:49,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 333 transitions, 3537 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:49,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:49,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:49,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:51,362 INFO L124 PetriNetUnfolderBase]: 4201/6415 cut-off events. [2024-06-27 20:20:51,362 INFO L125 PetriNetUnfolderBase]: For 1734338/1734338 co-relation queries the response was YES. [2024-06-27 20:20:51,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71100 conditions, 6415 events. 4201/6415 cut-off events. For 1734338/1734338 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34713 event pairs, 1055 based on Foata normal form. 1/6398 useless extension candidates. Maximal degree in co-relation 70963. Up to 5940 conditions per place. [2024-06-27 20:20:51,451 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 31 changer transitions 0/374 dead transitions. [2024-06-27 20:20:51,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 374 transitions, 4615 flow [2024-06-27 20:20:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:20:51,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 20:20:51,454 INFO L175 Difference]: Start difference. First operand has 287 places, 333 transitions, 3537 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:20:51,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 374 transitions, 4615 flow [2024-06-27 20:20:54,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 374 transitions, 4485 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-27 20:20:54,896 INFO L231 Difference]: Finished difference. Result has 284 places, 344 transitions, 3648 flow [2024-06-27 20:20:54,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3648, PETRI_PLACES=284, PETRI_TRANSITIONS=344} [2024-06-27 20:20:54,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-27 20:20:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 344 transitions, 3648 flow [2024-06-27 20:20:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:54,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:20:54,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:20:54,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:20:54,897 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)] === [2024-06-27 20:20:54,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:20:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -499389829, now seen corresponding path program 2 times [2024-06-27 20:20:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:20:54,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075553939] [2024-06-27 20:20:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:20:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:20:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:20:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:20:55,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:20:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075553939] [2024-06-27 20:20:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075553939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:20:55,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:20:55,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:20:55,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978798150] [2024-06-27 20:20:55,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:20:55,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:20:55,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:20:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:20:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:20:55,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:20:55,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 344 transitions, 3648 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:20:55,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:20:55,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:20:55,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:20:57,242 INFO L124 PetriNetUnfolderBase]: 4211/6429 cut-off events. [2024-06-27 20:20:57,242 INFO L125 PetriNetUnfolderBase]: For 1763798/1763798 co-relation queries the response was YES. [2024-06-27 20:20:57,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71616 conditions, 6429 events. 4211/6429 cut-off events. For 1763798/1763798 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 34764 event pairs, 1055 based on Foata normal form. 1/6412 useless extension candidates. Maximal degree in co-relation 71477. Up to 5974 conditions per place. [2024-06-27 20:20:57,331 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 297 selfloop transitions, 29 changer transitions 0/373 dead transitions. [2024-06-27 20:20:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 373 transitions, 4449 flow [2024-06-27 20:20:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:20:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:20:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:20:57,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 20:20:57,332 INFO L175 Difference]: Start difference. First operand has 284 places, 344 transitions, 3648 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:20:57,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 373 transitions, 4449 flow [2024-06-27 20:21:00,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 373 transitions, 4357 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-27 20:21:00,333 INFO L231 Difference]: Finished difference. Result has 290 places, 350 transitions, 3717 flow [2024-06-27 20:21:00,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3717, PETRI_PLACES=290, PETRI_TRANSITIONS=350} [2024-06-27 20:21:00,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-27 20:21:00,334 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 350 transitions, 3717 flow [2024-06-27 20:21:00,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:00,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:00,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:00,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:21:00,334 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)] === [2024-06-27 20:21:00,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1580844025, now seen corresponding path program 1 times [2024-06-27 20:21:00,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:00,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396917855] [2024-06-27 20:21:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:00,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:01,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:01,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396917855] [2024-06-27 20:21:01,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396917855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:01,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:01,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:21:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922168029] [2024-06-27 20:21:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:01,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:21:01,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:01,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:21:01,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:21:01,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:01,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 350 transitions, 3717 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:01,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:01,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:01,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:02,466 INFO L124 PetriNetUnfolderBase]: 4224/6448 cut-off events. [2024-06-27 20:21:02,466 INFO L125 PetriNetUnfolderBase]: For 1802100/1802103 co-relation queries the response was YES. [2024-06-27 20:21:02,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72211 conditions, 6448 events. 4224/6448 cut-off events. For 1802100/1802103 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 34909 event pairs, 1060 based on Foata normal form. 3/6432 useless extension candidates. Maximal degree in co-relation 72070. Up to 5969 conditions per place. [2024-06-27 20:21:02,561 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 299 selfloop transitions, 34 changer transitions 0/380 dead transitions. [2024-06-27 20:21:02,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 380 transitions, 4977 flow [2024-06-27 20:21:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:21:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:21:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:21:02,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 20:21:02,562 INFO L175 Difference]: Start difference. First operand has 290 places, 350 transitions, 3717 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:21:02,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 380 transitions, 4977 flow [2024-06-27 20:21:04,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 380 transitions, 4885 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:21:04,642 INFO L231 Difference]: Finished difference. Result has 292 places, 359 transitions, 3855 flow [2024-06-27 20:21:04,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3855, PETRI_PLACES=292, PETRI_TRANSITIONS=359} [2024-06-27 20:21:04,642 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-27 20:21:04,643 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 359 transitions, 3855 flow [2024-06-27 20:21:04,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:04,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:04,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:04,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:21:04,643 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)] === [2024-06-27 20:21:04,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash -495695621, now seen corresponding path program 2 times [2024-06-27 20:21:04,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:04,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443123716] [2024-06-27 20:21:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:04,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443123716] [2024-06-27 20:21:05,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443123716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:05,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:05,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:21:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605577948] [2024-06-27 20:21:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:21:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:21:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:21:05,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:05,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 359 transitions, 3855 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:05,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:05,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:05,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:06,795 INFO L124 PetriNetUnfolderBase]: 4226/6455 cut-off events. [2024-06-27 20:21:06,796 INFO L125 PetriNetUnfolderBase]: For 1833315/1833318 co-relation queries the response was YES. [2024-06-27 20:21:06,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72923 conditions, 6455 events. 4226/6455 cut-off events. For 1833315/1833318 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 35006 event pairs, 1060 based on Foata normal form. 3/6448 useless extension candidates. Maximal degree in co-relation 72781. Up to 5975 conditions per place. [2024-06-27 20:21:06,897 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 296 selfloop transitions, 41 changer transitions 0/384 dead transitions. [2024-06-27 20:21:06,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 384 transitions, 5094 flow [2024-06-27 20:21:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:21:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:21:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:21:06,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-27 20:21:06,898 INFO L175 Difference]: Start difference. First operand has 292 places, 359 transitions, 3855 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:21:06,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 384 transitions, 5094 flow [2024-06-27 20:21:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 384 transitions, 4982 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-27 20:21:09,244 INFO L231 Difference]: Finished difference. Result has 297 places, 366 transitions, 3956 flow [2024-06-27 20:21:09,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3956, PETRI_PLACES=297, PETRI_TRANSITIONS=366} [2024-06-27 20:21:09,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-27 20:21:09,245 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 366 transitions, 3956 flow [2024-06-27 20:21:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:09,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:09,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:21:09,245 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:09,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1000239869, now seen corresponding path program 5 times [2024-06-27 20:21:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:09,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036239364] [2024-06-27 20:21:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:09,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:10,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:10,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036239364] [2024-06-27 20:21:10,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036239364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:10,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:10,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:10,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025726159] [2024-06-27 20:21:10,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:10,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:10,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:10,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:10,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 366 transitions, 3956 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:10,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:10,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:10,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:12,481 INFO L124 PetriNetUnfolderBase]: 4223/6527 cut-off events. [2024-06-27 20:21:12,482 INFO L125 PetriNetUnfolderBase]: For 2028511/2028514 co-relation queries the response was YES. [2024-06-27 20:21:12,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77427 conditions, 6527 events. 4223/6527 cut-off events. For 2028511/2028514 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 36858 event pairs, 854 based on Foata normal form. 16/6540 useless extension candidates. Maximal degree in co-relation 77283. Up to 5163 conditions per place. [2024-06-27 20:21:12,579 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 295 selfloop transitions, 120 changer transitions 0/428 dead transitions. [2024-06-27 20:21:12,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 428 transitions, 5882 flow [2024-06-27 20:21:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-27 20:21:12,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 20:21:12,581 INFO L175 Difference]: Start difference. First operand has 297 places, 366 transitions, 3956 flow. Second operand 12 states and 249 transitions. [2024-06-27 20:21:12,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 428 transitions, 5882 flow [2024-06-27 20:21:14,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 428 transitions, 5791 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:21:14,313 INFO L231 Difference]: Finished difference. Result has 306 places, 368 transitions, 4273 flow [2024-06-27 20:21:14,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4273, PETRI_PLACES=306, PETRI_TRANSITIONS=368} [2024-06-27 20:21:14,314 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-27 20:21:14,314 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 368 transitions, 4273 flow [2024-06-27 20:21:14,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:14,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:14,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:21:14,314 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:14,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1778879807, now seen corresponding path program 6 times [2024-06-27 20:21:14,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:14,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716503984] [2024-06-27 20:21:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:14,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:15,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716503984] [2024-06-27 20:21:15,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716503984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:15,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:15,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223894689] [2024-06-27 20:21:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:15,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:15,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 368 transitions, 4273 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:15,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:15,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:15,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:17,375 INFO L124 PetriNetUnfolderBase]: 4478/6963 cut-off events. [2024-06-27 20:21:17,376 INFO L125 PetriNetUnfolderBase]: For 2259955/2259958 co-relation queries the response was YES. [2024-06-27 20:21:17,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86129 conditions, 6963 events. 4478/6963 cut-off events. For 2259955/2259958 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 40232 event pairs, 953 based on Foata normal form. 16/6976 useless extension candidates. Maximal degree in co-relation 85984. Up to 5672 conditions per place. [2024-06-27 20:21:17,477 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 313 selfloop transitions, 99 changer transitions 0/425 dead transitions. [2024-06-27 20:21:17,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 425 transitions, 5929 flow [2024-06-27 20:21:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-27 20:21:17,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-06-27 20:21:17,478 INFO L175 Difference]: Start difference. First operand has 306 places, 368 transitions, 4273 flow. Second operand 11 states and 228 transitions. [2024-06-27 20:21:17,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 425 transitions, 5929 flow [2024-06-27 20:21:19,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 425 transitions, 5685 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:19,689 INFO L231 Difference]: Finished difference. Result has 311 places, 371 transitions, 4494 flow [2024-06-27 20:21:19,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4494, PETRI_PLACES=311, PETRI_TRANSITIONS=371} [2024-06-27 20:21:19,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-27 20:21:19,690 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 371 transitions, 4494 flow [2024-06-27 20:21:19,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:19,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:19,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:21:19,690 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:19,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1171062269, now seen corresponding path program 7 times [2024-06-27 20:21:19,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:19,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402241252] [2024-06-27 20:21:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:19,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:20,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402241252] [2024-06-27 20:21:20,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402241252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:20,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:20,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:20,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766899271] [2024-06-27 20:21:20,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 371 transitions, 4494 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:21,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:21,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:21,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:22,857 INFO L124 PetriNetUnfolderBase]: 4611/7176 cut-off events. [2024-06-27 20:21:22,857 INFO L125 PetriNetUnfolderBase]: For 2382224/2382227 co-relation queries the response was YES. [2024-06-27 20:21:22,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88326 conditions, 7176 events. 4611/7176 cut-off events. For 2382224/2382227 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 41952 event pairs, 998 based on Foata normal form. 36/7209 useless extension candidates. Maximal degree in co-relation 88178. Up to 6107 conditions per place. [2024-06-27 20:21:22,965 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 316 selfloop transitions, 98 changer transitions 0/427 dead transitions. [2024-06-27 20:21:22,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 427 transitions, 5686 flow [2024-06-27 20:21:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 20:21:22,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:21:22,966 INFO L175 Difference]: Start difference. First operand has 311 places, 371 transitions, 4494 flow. Second operand 12 states and 242 transitions. [2024-06-27 20:21:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 427 transitions, 5686 flow [2024-06-27 20:21:25,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 427 transitions, 5506 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:25,511 INFO L231 Difference]: Finished difference. Result has 316 places, 373 transitions, 4677 flow [2024-06-27 20:21:25,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4326, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4677, PETRI_PLACES=316, PETRI_TRANSITIONS=373} [2024-06-27 20:21:25,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-27 20:21:25,511 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 373 transitions, 4677 flow [2024-06-27 20:21:25,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:25,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:25,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:21:25,512 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:25,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1177737623, now seen corresponding path program 1 times [2024-06-27 20:21:25,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:25,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432107498] [2024-06-27 20:21:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:26,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:26,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432107498] [2024-06-27 20:21:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432107498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:26,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:26,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502319672] [2024-06-27 20:21:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:26,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:21:26,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 373 transitions, 4677 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:26,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:26,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:21:26,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:28,562 INFO L124 PetriNetUnfolderBase]: 5121/7789 cut-off events. [2024-06-27 20:21:28,562 INFO L125 PetriNetUnfolderBase]: For 2335412/2335415 co-relation queries the response was YES. [2024-06-27 20:21:28,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93042 conditions, 7789 events. 5121/7789 cut-off events. For 2335412/2335415 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43542 event pairs, 1182 based on Foata normal form. 4/7790 useless extension candidates. Maximal degree in co-relation 92892. Up to 7386 conditions per place. [2024-06-27 20:21:28,679 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 357 selfloop transitions, 48 changer transitions 0/416 dead transitions. [2024-06-27 20:21:28,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 416 transitions, 5707 flow [2024-06-27 20:21:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:21:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:21:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:21:28,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:21:28,680 INFO L175 Difference]: Start difference. First operand has 316 places, 373 transitions, 4677 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:21:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 416 transitions, 5707 flow [2024-06-27 20:21:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 416 transitions, 5472 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 20:21:32,159 INFO L231 Difference]: Finished difference. Result has 317 places, 378 transitions, 4675 flow [2024-06-27 20:21:32,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4675, PETRI_PLACES=317, PETRI_TRANSITIONS=378} [2024-06-27 20:21:32,159 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-27 20:21:32,159 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 378 transitions, 4675 flow [2024-06-27 20:21:32,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:32,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:32,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:32,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:21:32,159 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:32,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1944935957, now seen corresponding path program 8 times [2024-06-27 20:21:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496908800] [2024-06-27 20:21:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:33,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:33,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496908800] [2024-06-27 20:21:33,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496908800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:33,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:33,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:33,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111849531] [2024-06-27 20:21:33,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:33,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:33,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:33,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:33,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 378 transitions, 4675 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:33,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:33,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:33,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:35,291 INFO L124 PetriNetUnfolderBase]: 4804/7513 cut-off events. [2024-06-27 20:21:35,291 INFO L125 PetriNetUnfolderBase]: For 2499770/2499773 co-relation queries the response was YES. [2024-06-27 20:21:35,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92311 conditions, 7513 events. 4804/7513 cut-off events. For 2499770/2499773 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 44627 event pairs, 1044 based on Foata normal form. 36/7546 useless extension candidates. Maximal degree in co-relation 92159. Up to 6455 conditions per place. [2024-06-27 20:21:35,416 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 325 selfloop transitions, 93 changer transitions 0/432 dead transitions. [2024-06-27 20:21:35,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 432 transitions, 5882 flow [2024-06-27 20:21:35,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-27 20:21:35,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-27 20:21:35,417 INFO L175 Difference]: Start difference. First operand has 317 places, 378 transitions, 4675 flow. Second operand 11 states and 224 transitions. [2024-06-27 20:21:35,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 432 transitions, 5882 flow [2024-06-27 20:21:39,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 432 transitions, 5697 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:39,138 INFO L231 Difference]: Finished difference. Result has 322 places, 383 transitions, 4874 flow [2024-06-27 20:21:39,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4874, PETRI_PLACES=322, PETRI_TRANSITIONS=383} [2024-06-27 20:21:39,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-27 20:21:39,139 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 383 transitions, 4874 flow [2024-06-27 20:21:39,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:39,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:39,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:21:39,139 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:39,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1945113587, now seen corresponding path program 9 times [2024-06-27 20:21:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080004953] [2024-06-27 20:21:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080004953] [2024-06-27 20:21:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080004953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:40,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:40,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:40,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461611467] [2024-06-27 20:21:40,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:40,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:40,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:40,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:40,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 383 transitions, 4874 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:40,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:40,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:40,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:42,455 INFO L124 PetriNetUnfolderBase]: 4990/7824 cut-off events. [2024-06-27 20:21:42,455 INFO L125 PetriNetUnfolderBase]: For 2576445/2576448 co-relation queries the response was YES. [2024-06-27 20:21:42,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97522 conditions, 7824 events. 4990/7824 cut-off events. For 2576445/2576448 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47183 event pairs, 1048 based on Foata normal form. 16/7832 useless extension candidates. Maximal degree in co-relation 97368. Up to 6458 conditions per place. [2024-06-27 20:21:42,582 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 327 selfloop transitions, 101 changer transitions 0/442 dead transitions. [2024-06-27 20:21:42,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 442 transitions, 6488 flow [2024-06-27 20:21:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 20:21:42,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 20:21:42,584 INFO L175 Difference]: Start difference. First operand has 322 places, 383 transitions, 4874 flow. Second operand 11 states and 231 transitions. [2024-06-27 20:21:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 442 transitions, 6488 flow [2024-06-27 20:21:46,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 442 transitions, 6253 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-27 20:21:46,269 INFO L231 Difference]: Finished difference. Result has 326 places, 387 transitions, 5016 flow [2024-06-27 20:21:46,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5016, PETRI_PLACES=326, PETRI_TRANSITIONS=387} [2024-06-27 20:21:46,269 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-27 20:21:46,269 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 387 transitions, 5016 flow [2024-06-27 20:21:46,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:46,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:46,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:46,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:21:46,269 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:46,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:46,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1772446067, now seen corresponding path program 10 times [2024-06-27 20:21:46,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:46,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514324932] [2024-06-27 20:21:46,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:46,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514324932] [2024-06-27 20:21:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514324932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761122246] [2024-06-27 20:21:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:47,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:47,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 387 transitions, 5016 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:47,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:47,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:47,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:49,468 INFO L124 PetriNetUnfolderBase]: 4925/7719 cut-off events. [2024-06-27 20:21:49,468 INFO L125 PetriNetUnfolderBase]: For 2539845/2539848 co-relation queries the response was YES. [2024-06-27 20:21:49,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92749 conditions, 7719 events. 4925/7719 cut-off events. For 2539845/2539848 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 46452 event pairs, 1039 based on Foata normal form. 40/7751 useless extension candidates. Maximal degree in co-relation 92593. Up to 6629 conditions per place. [2024-06-27 20:21:49,591 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 325 selfloop transitions, 96 changer transitions 0/435 dead transitions. [2024-06-27 20:21:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 435 transitions, 6050 flow [2024-06-27 20:21:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:21:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:21:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 20:21:49,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 20:21:49,592 INFO L175 Difference]: Start difference. First operand has 326 places, 387 transitions, 5016 flow. Second operand 11 states and 221 transitions. [2024-06-27 20:21:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 435 transitions, 6050 flow [2024-06-27 20:21:53,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 435 transitions, 5856 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:21:53,854 INFO L231 Difference]: Finished difference. Result has 330 places, 387 transitions, 5023 flow [2024-06-27 20:21:53,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5023, PETRI_PLACES=330, PETRI_TRANSITIONS=387} [2024-06-27 20:21:53,855 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-27 20:21:53,855 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 387 transitions, 5023 flow [2024-06-27 20:21:53,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:53,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:21:53,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:21:53,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:21:53,855 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:21:53,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:21:53,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1004828489, now seen corresponding path program 11 times [2024-06-27 20:21:53,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:21:53,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057327517] [2024-06-27 20:21:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:21:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:21:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:21:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:21:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:21:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057327517] [2024-06-27 20:21:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057327517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:21:55,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:21:55,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:21:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140834723] [2024-06-27 20:21:55,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:21:55,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:21:55,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:21:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:21:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:21:55,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:21:55,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 387 transitions, 5023 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:21:55,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:21:55,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:21:55,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:21:57,580 INFO L124 PetriNetUnfolderBase]: 4889/7663 cut-off events. [2024-06-27 20:21:57,581 INFO L125 PetriNetUnfolderBase]: For 2381129/2381132 co-relation queries the response was YES. [2024-06-27 20:21:57,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90367 conditions, 7663 events. 4889/7663 cut-off events. For 2381129/2381132 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 46005 event pairs, 1009 based on Foata normal form. 20/7675 useless extension candidates. Maximal degree in co-relation 90209. Up to 6453 conditions per place. [2024-06-27 20:21:57,730 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 326 selfloop transitions, 100 changer transitions 0/440 dead transitions. [2024-06-27 20:21:57,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 440 transitions, 6081 flow [2024-06-27 20:21:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:21:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:21:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-27 20:21:57,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564393939393939 [2024-06-27 20:21:57,731 INFO L175 Difference]: Start difference. First operand has 330 places, 387 transitions, 5023 flow. Second operand 12 states and 241 transitions. [2024-06-27 20:21:57,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 440 transitions, 6081 flow [2024-06-27 20:22:00,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 440 transitions, 5851 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 20:22:00,676 INFO L231 Difference]: Finished difference. Result has 332 places, 387 transitions, 5005 flow [2024-06-27 20:22:00,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4793, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5005, PETRI_PLACES=332, PETRI_TRANSITIONS=387} [2024-06-27 20:22:00,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-27 20:22:00,677 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 387 transitions, 5005 flow [2024-06-27 20:22:00,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:00,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:00,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:00,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:22:00,677 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:00,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1504611539, now seen corresponding path program 12 times [2024-06-27 20:22:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780978934] [2024-06-27 20:22:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:00,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:01,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780978934] [2024-06-27 20:22:01,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780978934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:01,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:01,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267868295] [2024-06-27 20:22:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:02,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:02,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 387 transitions, 5005 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:02,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:02,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:02,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:04,148 INFO L124 PetriNetUnfolderBase]: 4947/7766 cut-off events. [2024-06-27 20:22:04,148 INFO L125 PetriNetUnfolderBase]: For 2403942/2403945 co-relation queries the response was YES. [2024-06-27 20:22:04,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91383 conditions, 7766 events. 4947/7766 cut-off events. For 2403942/2403945 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 46874 event pairs, 997 based on Foata normal form. 16/7774 useless extension candidates. Maximal degree in co-relation 91224. Up to 6468 conditions per place. [2024-06-27 20:22:04,260 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 309 selfloop transitions, 121 changer transitions 0/444 dead transitions. [2024-06-27 20:22:04,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 444 transitions, 6929 flow [2024-06-27 20:22:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:22:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:22:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 20:22:04,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834710743801653 [2024-06-27 20:22:04,261 INFO L175 Difference]: Start difference. First operand has 332 places, 387 transitions, 5005 flow. Second operand 11 states and 234 transitions. [2024-06-27 20:22:04,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 444 transitions, 6929 flow [2024-06-27 20:22:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 444 transitions, 6735 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 20:22:07,036 INFO L231 Difference]: Finished difference. Result has 333 places, 388 transitions, 5131 flow [2024-06-27 20:22:07,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5131, PETRI_PLACES=333, PETRI_TRANSITIONS=388} [2024-06-27 20:22:07,037 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-27 20:22:07,037 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 388 transitions, 5131 flow [2024-06-27 20:22:07,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:07,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:07,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:07,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:22:07,038 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:07,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:07,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1000359839, now seen corresponding path program 13 times [2024-06-27 20:22:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:07,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50276526] [2024-06-27 20:22:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:07,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:08,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:08,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50276526] [2024-06-27 20:22:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50276526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:08,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:08,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:08,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048952786] [2024-06-27 20:22:08,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:08,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:08,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:08,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:08,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:08,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:08,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 388 transitions, 5131 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:08,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:08,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:08,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:10,423 INFO L124 PetriNetUnfolderBase]: 4911/7710 cut-off events. [2024-06-27 20:22:10,423 INFO L125 PetriNetUnfolderBase]: For 2368524/2368527 co-relation queries the response was YES. [2024-06-27 20:22:10,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89359 conditions, 7710 events. 4911/7710 cut-off events. For 2368524/2368527 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 46382 event pairs, 1002 based on Foata normal form. 20/7722 useless extension candidates. Maximal degree in co-relation 89199. Up to 6270 conditions per place. [2024-06-27 20:22:10,543 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 314 selfloop transitions, 118 changer transitions 0/446 dead transitions. [2024-06-27 20:22:10,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 446 transitions, 6215 flow [2024-06-27 20:22:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:22:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:22:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 261 transitions. [2024-06-27 20:22:10,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562937062937063 [2024-06-27 20:22:10,544 INFO L175 Difference]: Start difference. First operand has 333 places, 388 transitions, 5131 flow. Second operand 13 states and 261 transitions. [2024-06-27 20:22:10,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 446 transitions, 6215 flow [2024-06-27 20:22:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 446 transitions, 5695 flow, removed 58 selfloop flow, removed 11 redundant places. [2024-06-27 20:22:14,487 INFO L231 Difference]: Finished difference. Result has 335 places, 388 transitions, 4862 flow [2024-06-27 20:22:14,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4611, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4862, PETRI_PLACES=335, PETRI_TRANSITIONS=388} [2024-06-27 20:22:14,488 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-27 20:22:14,488 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 388 transitions, 4862 flow [2024-06-27 20:22:14,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:14,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:14,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:22:14,488 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)] === [2024-06-27 20:22:14,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1573215545, now seen corresponding path program 1 times [2024-06-27 20:22:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838858944] [2024-06-27 20:22:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:15,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:15,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838858944] [2024-06-27 20:22:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838858944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:15,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:15,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:15,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092417262] [2024-06-27 20:22:15,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:15,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:15,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 388 transitions, 4862 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:15,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:15,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:15,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:17,242 INFO L124 PetriNetUnfolderBase]: 5174/8034 cut-off events. [2024-06-27 20:22:17,242 INFO L125 PetriNetUnfolderBase]: For 2360958/2360977 co-relation queries the response was YES. [2024-06-27 20:22:17,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89950 conditions, 8034 events. 5174/8034 cut-off events. For 2360958/2360977 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47453 event pairs, 1338 based on Foata normal form. 12/7978 useless extension candidates. Maximal degree in co-relation 89793. Up to 7506 conditions per place. [2024-06-27 20:22:17,360 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 317 selfloop transitions, 40 changer transitions 0/419 dead transitions. [2024-06-27 20:22:17,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 419 transitions, 5954 flow [2024-06-27 20:22:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:22:17,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 20:22:17,361 INFO L175 Difference]: Start difference. First operand has 335 places, 388 transitions, 4862 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:22:17,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 419 transitions, 5954 flow [2024-06-27 20:22:21,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 419 transitions, 5713 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:22:21,093 INFO L231 Difference]: Finished difference. Result has 332 places, 397 transitions, 4837 flow [2024-06-27 20:22:21,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4837, PETRI_PLACES=332, PETRI_TRANSITIONS=397} [2024-06-27 20:22:21,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-27 20:22:21,094 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 397 transitions, 4837 flow [2024-06-27 20:22:21,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:21,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:21,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:21,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:22:21,094 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)] === [2024-06-27 20:22:21,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -488290279, now seen corresponding path program 3 times [2024-06-27 20:22:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:21,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485120503] [2024-06-27 20:22:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:22,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485120503] [2024-06-27 20:22:22,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485120503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:22,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:22,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133464885] [2024-06-27 20:22:22,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:22,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:22,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:22,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 397 transitions, 4837 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:22,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:22,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:23,885 INFO L124 PetriNetUnfolderBase]: 5262/8156 cut-off events. [2024-06-27 20:22:23,885 INFO L125 PetriNetUnfolderBase]: For 2322944/2322944 co-relation queries the response was YES. [2024-06-27 20:22:23,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90621 conditions, 8156 events. 5262/8156 cut-off events. For 2322944/2322944 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47910 event pairs, 1329 based on Foata normal form. 1/8127 useless extension candidates. Maximal degree in co-relation 90463. Up to 7696 conditions per place. [2024-06-27 20:22:24,014 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 340 selfloop transitions, 29 changer transitions 0/417 dead transitions. [2024-06-27 20:22:24,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 417 transitions, 5675 flow [2024-06-27 20:22:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:22:24,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-27 20:22:24,015 INFO L175 Difference]: Start difference. First operand has 332 places, 397 transitions, 4837 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:22:24,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 417 transitions, 5675 flow [2024-06-27 20:22:26,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 417 transitions, 5613 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:26,924 INFO L231 Difference]: Finished difference. Result has 337 places, 400 transitions, 4903 flow [2024-06-27 20:22:26,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=337, PETRI_TRANSITIONS=400} [2024-06-27 20:22:26,925 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-27 20:22:26,925 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 400 transitions, 4903 flow [2024-06-27 20:22:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:26,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:26,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:22:26,925 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)] === [2024-06-27 20:22:26,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 700204953, now seen corresponding path program 3 times [2024-06-27 20:22:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298909110] [2024-06-27 20:22:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:26,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:27,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298909110] [2024-06-27 20:22:27,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298909110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:27,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:27,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:27,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985278944] [2024-06-27 20:22:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:27,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:27,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:27,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 400 transitions, 4903 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:27,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:27,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:27,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:29,449 INFO L124 PetriNetUnfolderBase]: 5266/8159 cut-off events. [2024-06-27 20:22:29,449 INFO L125 PetriNetUnfolderBase]: For 2360969/2360973 co-relation queries the response was YES. [2024-06-27 20:22:29,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90895 conditions, 8159 events. 5266/8159 cut-off events. For 2360969/2360973 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47926 event pairs, 1336 based on Foata normal form. 1/8125 useless extension candidates. Maximal degree in co-relation 90734. Up to 7714 conditions per place. [2024-06-27 20:22:29,581 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 345 selfloop transitions, 24 changer transitions 0/417 dead transitions. [2024-06-27 20:22:29,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 417 transitions, 5905 flow [2024-06-27 20:22:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:22:29,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:22:29,582 INFO L175 Difference]: Start difference. First operand has 337 places, 400 transitions, 4903 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:22:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 417 transitions, 5905 flow [2024-06-27 20:22:33,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 417 transitions, 5791 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:33,499 INFO L231 Difference]: Finished difference. Result has 339 places, 400 transitions, 4843 flow [2024-06-27 20:22:33,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4789, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4843, PETRI_PLACES=339, PETRI_TRANSITIONS=400} [2024-06-27 20:22:33,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-27 20:22:33,500 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 400 transitions, 4843 flow [2024-06-27 20:22:33,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:33,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:33,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:22:33,500 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)] === [2024-06-27 20:22:33,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:33,500 INFO L85 PathProgramCache]: Analyzing trace with hash 700592763, now seen corresponding path program 4 times [2024-06-27 20:22:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:33,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084545043] [2024-06-27 20:22:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:34,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:34,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084545043] [2024-06-27 20:22:34,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084545043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:34,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:34,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014601404] [2024-06-27 20:22:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:34,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:34,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:34,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:34,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 400 transitions, 4843 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:34,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:34,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:36,047 INFO L124 PetriNetUnfolderBase]: 5271/8166 cut-off events. [2024-06-27 20:22:36,047 INFO L125 PetriNetUnfolderBase]: For 2397420/2397424 co-relation queries the response was YES. [2024-06-27 20:22:36,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91247 conditions, 8166 events. 5271/8166 cut-off events. For 2397420/2397424 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47966 event pairs, 1315 based on Foata normal form. 1/8132 useless extension candidates. Maximal degree in co-relation 91085. Up to 7736 conditions per place. [2024-06-27 20:22:36,173 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 19 changer transitions 0/416 dead transitions. [2024-06-27 20:22:36,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 416 transitions, 5668 flow [2024-06-27 20:22:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:22:36,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-27 20:22:36,174 INFO L175 Difference]: Start difference. First operand has 339 places, 400 transitions, 4843 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:22:36,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 416 transitions, 5668 flow [2024-06-27 20:22:40,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 416 transitions, 5574 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:40,281 INFO L231 Difference]: Finished difference. Result has 340 places, 403 transitions, 4856 flow [2024-06-27 20:22:40,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4856, PETRI_PLACES=340, PETRI_TRANSITIONS=403} [2024-06-27 20:22:40,282 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-27 20:22:40,282 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 403 transitions, 4856 flow [2024-06-27 20:22:40,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:40,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:40,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:40,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:22:40,282 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)] === [2024-06-27 20:22:40,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash 961203067, now seen corresponding path program 5 times [2024-06-27 20:22:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:40,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890554253] [2024-06-27 20:22:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:40,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:40,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890554253] [2024-06-27 20:22:40,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890554253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:40,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:40,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:40,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686674363] [2024-06-27 20:22:40,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:40,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:41,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:41,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 403 transitions, 4856 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:41,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:41,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:41,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:42,808 INFO L124 PetriNetUnfolderBase]: 5261/8156 cut-off events. [2024-06-27 20:22:42,809 INFO L125 PetriNetUnfolderBase]: For 2425548/2425551 co-relation queries the response was YES. [2024-06-27 20:22:42,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91215 conditions, 8156 events. 5261/8156 cut-off events. For 2425548/2425551 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47855 event pairs, 1332 based on Foata normal form. 3/8128 useless extension candidates. Maximal degree in co-relation 91053. Up to 7725 conditions per place. [2024-06-27 20:22:42,939 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 346 selfloop transitions, 19 changer transitions 0/413 dead transitions. [2024-06-27 20:22:42,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 413 transitions, 5610 flow [2024-06-27 20:22:42,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:42,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:22:42,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-27 20:22:42,940 INFO L175 Difference]: Start difference. First operand has 340 places, 403 transitions, 4856 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:22:42,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 413 transitions, 5610 flow [2024-06-27 20:22:46,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 413 transitions, 5532 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:46,365 INFO L231 Difference]: Finished difference. Result has 342 places, 403 transitions, 4822 flow [2024-06-27 20:22:46,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4822, PETRI_PLACES=342, PETRI_TRANSITIONS=403} [2024-06-27 20:22:46,365 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-27 20:22:46,365 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 403 transitions, 4822 flow [2024-06-27 20:22:46,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:46,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:46,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:46,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:22:46,366 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)] === [2024-06-27 20:22:46,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:46,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1826411313, now seen corresponding path program 6 times [2024-06-27 20:22:46,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:46,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470452209] [2024-06-27 20:22:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:46,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470452209] [2024-06-27 20:22:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470452209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:47,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:47,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278807519] [2024-06-27 20:22:47,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:47,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:47,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:47,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:22:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 403 transitions, 4822 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:47,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:47,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:22:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:48,879 INFO L124 PetriNetUnfolderBase]: 5265/8159 cut-off events. [2024-06-27 20:22:48,879 INFO L125 PetriNetUnfolderBase]: For 2462745/2462752 co-relation queries the response was YES. [2024-06-27 20:22:48,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91557 conditions, 8159 events. 5265/8159 cut-off events. For 2462745/2462752 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 47942 event pairs, 1318 based on Foata normal form. 3/8126 useless extension candidates. Maximal degree in co-relation 91394. Up to 7719 conditions per place. [2024-06-27 20:22:49,007 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 338 selfloop transitions, 27 changer transitions 0/413 dead transitions. [2024-06-27 20:22:49,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 413 transitions, 5576 flow [2024-06-27 20:22:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:22:49,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40584415584415584 [2024-06-27 20:22:49,008 INFO L175 Difference]: Start difference. First operand has 342 places, 403 transitions, 4822 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:22:49,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 413 transitions, 5576 flow [2024-06-27 20:22:53,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 413 transitions, 5496 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:53,404 INFO L231 Difference]: Finished difference. Result has 343 places, 403 transitions, 4802 flow [2024-06-27 20:22:53,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4802, PETRI_PLACES=343, PETRI_TRANSITIONS=403} [2024-06-27 20:22:53,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-27 20:22:53,404 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 403 transitions, 4802 flow [2024-06-27 20:22:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:53,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:53,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:22:53,404 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash 831253587, now seen corresponding path program 2 times [2024-06-27 20:22:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336381787] [2024-06-27 20:22:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:53,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336381787] [2024-06-27 20:22:54,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336381787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:54,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:54,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:22:54,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146156961] [2024-06-27 20:22:54,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:22:54,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:22:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:22:54,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:22:54,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 403 transitions, 4802 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:54,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:54,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:22:54,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:56,804 INFO L124 PetriNetUnfolderBase]: 5530/8453 cut-off events. [2024-06-27 20:22:56,804 INFO L125 PetriNetUnfolderBase]: For 2530348/2530352 co-relation queries the response was YES. [2024-06-27 20:22:56,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94111 conditions, 8453 events. 5530/8453 cut-off events. For 2530348/2530352 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 48611 event pairs, 1351 based on Foata normal form. 4/8450 useless extension candidates. Maximal degree in co-relation 93947. Up to 8205 conditions per place. [2024-06-27 20:22:56,944 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 404 selfloop transitions, 23 changer transitions 0/438 dead transitions. [2024-06-27 20:22:56,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 438 transitions, 5840 flow [2024-06-27 20:22:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:22:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:22:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:22:56,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 20:22:56,946 INFO L175 Difference]: Start difference. First operand has 343 places, 403 transitions, 4802 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:22:56,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 438 transitions, 5840 flow [2024-06-27 20:23:01,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 438 transitions, 5750 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:01,493 INFO L231 Difference]: Finished difference. Result has 347 places, 405 transitions, 4871 flow [2024-06-27 20:23:01,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4871, PETRI_PLACES=347, PETRI_TRANSITIONS=405} [2024-06-27 20:23:01,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-27 20:23:01,494 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 405 transitions, 4871 flow [2024-06-27 20:23:01,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:01,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:01,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:01,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:23:01,494 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:01,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1270246311, now seen corresponding path program 14 times [2024-06-27 20:23:01,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:01,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315463453] [2024-06-27 20:23:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:01,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:02,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:02,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315463453] [2024-06-27 20:23:02,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315463453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:02,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:02,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:02,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427500765] [2024-06-27 20:23:02,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:02,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:02,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:02,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:23:02,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 405 transitions, 4871 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:02,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:02,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:23:02,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:04,806 INFO L124 PetriNetUnfolderBase]: 5047/7915 cut-off events. [2024-06-27 20:23:04,806 INFO L125 PetriNetUnfolderBase]: For 2657399/2657399 co-relation queries the response was YES. [2024-06-27 20:23:04,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92300 conditions, 7915 events. 5047/7915 cut-off events. For 2657399/2657399 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 47965 event pairs, 1152 based on Foata normal form. 20/7933 useless extension candidates. Maximal degree in co-relation 92135. Up to 7080 conditions per place. [2024-06-27 20:23:05,126 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 362 selfloop transitions, 77 changer transitions 0/453 dead transitions. [2024-06-27 20:23:05,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 453 transitions, 6421 flow [2024-06-27 20:23:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:23:05,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-27 20:23:05,128 INFO L175 Difference]: Start difference. First operand has 347 places, 405 transitions, 4871 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:23:05,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 453 transitions, 6421 flow [2024-06-27 20:23:09,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 453 transitions, 6280 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:23:09,136 INFO L231 Difference]: Finished difference. Result has 350 places, 406 transitions, 4983 flow [2024-06-27 20:23:09,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4730, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4983, PETRI_PLACES=350, PETRI_TRANSITIONS=406} [2024-06-27 20:23:09,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-27 20:23:09,136 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 406 transitions, 4983 flow [2024-06-27 20:23:09,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:09,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:09,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:09,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:23:09,137 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:09,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -888477451, now seen corresponding path program 3 times [2024-06-27 20:23:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:09,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318224304] [2024-06-27 20:23:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:10,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318224304] [2024-06-27 20:23:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318224304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:10,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266110775] [2024-06-27 20:23:10,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:10,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:10,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:10,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:10,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:23:10,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 406 transitions, 4983 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:10,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:10,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:23:10,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:12,570 INFO L124 PetriNetUnfolderBase]: 5632/8625 cut-off events. [2024-06-27 20:23:12,570 INFO L125 PetriNetUnfolderBase]: For 2635528/2635528 co-relation queries the response was YES. [2024-06-27 20:23:12,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97084 conditions, 8625 events. 5632/8625 cut-off events. For 2635528/2635528 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 49968 event pairs, 1378 based on Foata normal form. 4/8627 useless extension candidates. Maximal degree in co-relation 96918. Up to 8328 conditions per place. [2024-06-27 20:23:12,695 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 403 selfloop transitions, 32 changer transitions 0/446 dead transitions. [2024-06-27 20:23:12,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 446 transitions, 6087 flow [2024-06-27 20:23:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:23:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:23:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:23:12,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 20:23:12,696 INFO L175 Difference]: Start difference. First operand has 350 places, 406 transitions, 4983 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:23:12,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 446 transitions, 6087 flow [2024-06-27 20:23:17,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 446 transitions, 5866 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:17,731 INFO L231 Difference]: Finished difference. Result has 351 places, 411 transitions, 4983 flow [2024-06-27 20:23:17,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4983, PETRI_PLACES=351, PETRI_TRANSITIONS=411} [2024-06-27 20:23:17,731 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-27 20:23:17,731 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 411 transitions, 4983 flow [2024-06-27 20:23:17,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:17,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:17,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:17,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:23:17,732 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:17,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1031064289, now seen corresponding path program 15 times [2024-06-27 20:23:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:17,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020155739] [2024-06-27 20:23:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:17,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:19,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020155739] [2024-06-27 20:23:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020155739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:19,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:19,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989280043] [2024-06-27 20:23:19,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:19,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:19,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:23:19,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 411 transitions, 4983 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:19,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:19,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:23:19,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:21,524 INFO L124 PetriNetUnfolderBase]: 5268/8290 cut-off events. [2024-06-27 20:23:21,524 INFO L125 PetriNetUnfolderBase]: For 2887665/2887665 co-relation queries the response was YES. [2024-06-27 20:23:21,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99453 conditions, 8290 events. 5268/8290 cut-off events. For 2887665/2887665 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50873 event pairs, 1184 based on Foata normal form. 16/8304 useless extension candidates. Maximal degree in co-relation 99286. Up to 7146 conditions per place. [2024-06-27 20:23:21,724 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 375 selfloop transitions, 74 changer transitions 0/464 dead transitions. [2024-06-27 20:23:21,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 464 transitions, 6705 flow [2024-06-27 20:23:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 20:23:21,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 20:23:21,725 INFO L175 Difference]: Start difference. First operand has 351 places, 411 transitions, 4983 flow. Second operand 11 states and 221 transitions. [2024-06-27 20:23:21,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 464 transitions, 6705 flow [2024-06-27 20:23:25,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 464 transitions, 6538 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:25,479 INFO L231 Difference]: Finished difference. Result has 355 places, 413 transitions, 5160 flow [2024-06-27 20:23:25,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5160, PETRI_PLACES=355, PETRI_TRANSITIONS=413} [2024-06-27 20:23:25,480 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-27 20:23:25,480 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 413 transitions, 5160 flow [2024-06-27 20:23:25,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:25,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:25,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:23:25,480 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:25,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -888723715, now seen corresponding path program 16 times [2024-06-27 20:23:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789293885] [2024-06-27 20:23:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:26,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789293885] [2024-06-27 20:23:26,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789293885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:26,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:26,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:26,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130521731] [2024-06-27 20:23:26,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:26,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:26,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:27,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:23:27,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 413 transitions, 5160 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:27,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:27,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:23:27,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:29,135 INFO L124 PetriNetUnfolderBase]: 5381/8473 cut-off events. [2024-06-27 20:23:29,135 INFO L125 PetriNetUnfolderBase]: For 3036691/3036691 co-relation queries the response was YES. [2024-06-27 20:23:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102025 conditions, 8473 events. 5381/8473 cut-off events. For 3036691/3036691 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 52401 event pairs, 1263 based on Foata normal form. 28/8499 useless extension candidates. Maximal degree in co-relation 101857. Up to 7737 conditions per place. [2024-06-27 20:23:29,280 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 402 selfloop transitions, 42 changer transitions 0/459 dead transitions. [2024-06-27 20:23:29,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 459 transitions, 6330 flow [2024-06-27 20:23:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:23:29,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 20:23:29,281 INFO L175 Difference]: Start difference. First operand has 355 places, 413 transitions, 5160 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:23:29,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 459 transitions, 6330 flow [2024-06-27 20:23:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 459 transitions, 6152 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:32,856 INFO L231 Difference]: Finished difference. Result has 359 places, 414 transitions, 5172 flow [2024-06-27 20:23:32,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5172, PETRI_PLACES=359, PETRI_TRANSITIONS=414} [2024-06-27 20:23:32,857 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-27 20:23:32,857 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 414 transitions, 5172 flow [2024-06-27 20:23:32,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:32,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:32,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:32,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:23:32,857 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:32,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -894979825, now seen corresponding path program 17 times [2024-06-27 20:23:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:32,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351041850] [2024-06-27 20:23:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:32,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:34,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:34,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351041850] [2024-06-27 20:23:34,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351041850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:34,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:34,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:34,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447971038] [2024-06-27 20:23:34,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:34,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:23:34,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 414 transitions, 5172 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:34,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:34,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:23:34,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:36,641 INFO L124 PetriNetUnfolderBase]: 5473/8625 cut-off events. [2024-06-27 20:23:36,641 INFO L125 PetriNetUnfolderBase]: For 3065543/3065543 co-relation queries the response was YES. [2024-06-27 20:23:36,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103560 conditions, 8625 events. 5473/8625 cut-off events. For 3065543/3065543 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 53626 event pairs, 1278 based on Foata normal form. 24/8647 useless extension candidates. Maximal degree in co-relation 103390. Up to 7916 conditions per place. [2024-06-27 20:23:36,783 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 401 selfloop transitions, 44 changer transitions 0/460 dead transitions. [2024-06-27 20:23:36,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 460 transitions, 6346 flow [2024-06-27 20:23:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 20:23:36,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359504132231405 [2024-06-27 20:23:36,784 INFO L175 Difference]: Start difference. First operand has 359 places, 414 transitions, 5172 flow. Second operand 11 states and 211 transitions. [2024-06-27 20:23:36,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 460 transitions, 6346 flow [2024-06-27 20:23:41,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 460 transitions, 6218 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:41,896 INFO L231 Difference]: Finished difference. Result has 361 places, 415 transitions, 5240 flow [2024-06-27 20:23:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5240, PETRI_PLACES=361, PETRI_TRANSITIONS=415} [2024-06-27 20:23:41,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-27 20:23:41,896 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 415 transitions, 5240 flow [2024-06-27 20:23:41,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:41,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:41,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:23:41,897 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:41,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -895152805, now seen corresponding path program 18 times [2024-06-27 20:23:41,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:41,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222430883] [2024-06-27 20:23:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:41,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:43,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:43,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222430883] [2024-06-27 20:23:43,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222430883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:43,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:43,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:43,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526808336] [2024-06-27 20:23:43,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:43,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:43,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:43,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:23:43,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 415 transitions, 5240 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:43,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:43,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:23:43,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:45,557 INFO L124 PetriNetUnfolderBase]: 5523/8721 cut-off events. [2024-06-27 20:23:45,557 INFO L125 PetriNetUnfolderBase]: For 3065890/3065890 co-relation queries the response was YES. [2024-06-27 20:23:45,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104090 conditions, 8721 events. 5523/8721 cut-off events. For 3065890/3065890 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 54513 event pairs, 1284 based on Foata normal form. 20/8739 useless extension candidates. Maximal degree in co-relation 103919. Up to 7892 conditions per place. [2024-06-27 20:23:45,699 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 383 selfloop transitions, 66 changer transitions 0/464 dead transitions. [2024-06-27 20:23:45,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 464 transitions, 7272 flow [2024-06-27 20:23:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:23:45,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 20:23:45,700 INFO L175 Difference]: Start difference. First operand has 361 places, 415 transitions, 5240 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:23:45,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 464 transitions, 7272 flow [2024-06-27 20:23:49,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 464 transitions, 7138 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 20:23:49,622 INFO L231 Difference]: Finished difference. Result has 363 places, 416 transitions, 5347 flow [2024-06-27 20:23:49,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5347, PETRI_PLACES=363, PETRI_TRANSITIONS=416} [2024-06-27 20:23:49,623 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-27 20:23:49,623 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 416 transitions, 5347 flow [2024-06-27 20:23:49,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:49,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:49,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:49,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:23:49,623 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:49,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:49,624 INFO L85 PathProgramCache]: Analyzing trace with hash -895157455, now seen corresponding path program 19 times [2024-06-27 20:23:49,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:49,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992639871] [2024-06-27 20:23:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:50,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:50,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992639871] [2024-06-27 20:23:50,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992639871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:23:50,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600779056] [2024-06-27 20:23:50,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:23:50,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:23:50,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:23:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:23:50,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 416 transitions, 5347 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:50,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:50,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:23:50,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:54,092 INFO L124 PetriNetUnfolderBase]: 5775/9152 cut-off events. [2024-06-27 20:23:54,092 INFO L125 PetriNetUnfolderBase]: For 3271073/3271073 co-relation queries the response was YES. [2024-06-27 20:23:54,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111354 conditions, 9152 events. 5775/9152 cut-off events. For 3271073/3271073 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58139 event pairs, 1334 based on Foata normal form. 16/9166 useless extension candidates. Maximal degree in co-relation 111182. Up to 7758 conditions per place. [2024-06-27 20:23:54,298 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 387 selfloop transitions, 71 changer transitions 0/473 dead transitions. [2024-06-27 20:23:54,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 473 transitions, 8071 flow [2024-06-27 20:23:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:23:54,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:23:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 20:23:54,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:23:54,303 INFO L175 Difference]: Start difference. First operand has 363 places, 416 transitions, 5347 flow. Second operand 11 states and 220 transitions. [2024-06-27 20:23:54,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 473 transitions, 8071 flow [2024-06-27 20:23:59,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 473 transitions, 7774 flow, removed 37 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:59,292 INFO L231 Difference]: Finished difference. Result has 365 places, 420 transitions, 5525 flow [2024-06-27 20:23:59,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5525, PETRI_PLACES=365, PETRI_TRANSITIONS=420} [2024-06-27 20:23:59,293 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-27 20:23:59,293 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 420 transitions, 5525 flow [2024-06-27 20:23:59,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:59,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:59,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:23:59,293 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:59,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1270419291, now seen corresponding path program 20 times [2024-06-27 20:23:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:59,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024562534] [2024-06-27 20:23:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:00,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:00,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024562534] [2024-06-27 20:24:00,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024562534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:00,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:00,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510272331] [2024-06-27 20:24:00,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:00,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:00,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:00,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:24:00,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 420 transitions, 5525 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:00,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:00,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:24:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:03,446 INFO L124 PetriNetUnfolderBase]: 5755/9113 cut-off events. [2024-06-27 20:24:03,447 INFO L125 PetriNetUnfolderBase]: For 3210170/3210170 co-relation queries the response was YES. [2024-06-27 20:24:03,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107948 conditions, 9113 events. 5755/9113 cut-off events. For 3210170/3210170 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 57790 event pairs, 1346 based on Foata normal form. 24/9135 useless extension candidates. Maximal degree in co-relation 107775. Up to 8272 conditions per place. [2024-06-27 20:24:03,580 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 384 selfloop transitions, 66 changer transitions 0/465 dead transitions. [2024-06-27 20:24:03,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 465 transitions, 6611 flow [2024-06-27 20:24:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:24:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:24:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:24:03,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 20:24:03,581 INFO L175 Difference]: Start difference. First operand has 365 places, 420 transitions, 5525 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:24:03,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 465 transitions, 6611 flow [2024-06-27 20:24:08,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 465 transitions, 6391 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:08,592 INFO L231 Difference]: Finished difference. Result has 369 places, 420 transitions, 5445 flow [2024-06-27 20:24:08,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5445, PETRI_PLACES=369, PETRI_TRANSITIONS=420} [2024-06-27 20:24:08,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-27 20:24:08,592 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 420 transitions, 5445 flow [2024-06-27 20:24:08,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:08,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:08,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:08,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:24:08,593 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:08,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1526896233, now seen corresponding path program 4 times [2024-06-27 20:24:08,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:08,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155242806] [2024-06-27 20:24:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:09,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:09,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155242806] [2024-06-27 20:24:09,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155242806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:09,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:09,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:09,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321528965] [2024-06-27 20:24:09,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:09,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:09,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:09,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:09,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:24:09,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 420 transitions, 5445 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:09,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:09,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:24:09,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:12,746 INFO L124 PetriNetUnfolderBase]: 6436/9953 cut-off events. [2024-06-27 20:24:12,746 INFO L125 PetriNetUnfolderBase]: For 3147381/3147381 co-relation queries the response was YES. [2024-06-27 20:24:12,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113015 conditions, 9953 events. 6436/9953 cut-off events. For 3147381/3147381 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 60575 event pairs, 1617 based on Foata normal form. 4/9955 useless extension candidates. Maximal degree in co-relation 112840. Up to 9692 conditions per place. [2024-06-27 20:24:12,893 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 421 selfloop transitions, 27 changer transitions 0/459 dead transitions. [2024-06-27 20:24:12,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 459 transitions, 6591 flow [2024-06-27 20:24:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:24:12,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-27 20:24:12,894 INFO L175 Difference]: Start difference. First operand has 369 places, 420 transitions, 5445 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:24:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 459 transitions, 6591 flow [2024-06-27 20:24:17,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 459 transitions, 6443 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:24:17,434 INFO L231 Difference]: Finished difference. Result has 370 places, 425 transitions, 5534 flow [2024-06-27 20:24:17,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5534, PETRI_PLACES=370, PETRI_TRANSITIONS=425} [2024-06-27 20:24:17,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-27 20:24:17,435 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 425 transitions, 5534 flow [2024-06-27 20:24:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:17,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:17,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:17,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:24:17,435 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:17,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1241796363, now seen corresponding path program 5 times [2024-06-27 20:24:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:17,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911429643] [2024-06-27 20:24:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:18,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911429643] [2024-06-27 20:24:18,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911429643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:18,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913585253] [2024-06-27 20:24:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:18,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:18,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:24:18,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 425 transitions, 5534 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:18,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:18,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:24:18,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:21,477 INFO L124 PetriNetUnfolderBase]: 6453/9980 cut-off events. [2024-06-27 20:24:21,478 INFO L125 PetriNetUnfolderBase]: For 3201825/3201825 co-relation queries the response was YES. [2024-06-27 20:24:21,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114102 conditions, 9980 events. 6453/9980 cut-off events. For 3201825/3201825 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 60802 event pairs, 1636 based on Foata normal form. 4/9982 useless extension candidates. Maximal degree in co-relation 113925. Up to 9746 conditions per place. [2024-06-27 20:24:21,620 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 427 selfloop transitions, 22 changer transitions 0/460 dead transitions. [2024-06-27 20:24:21,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 460 transitions, 6642 flow [2024-06-27 20:24:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:24:21,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-27 20:24:21,621 INFO L175 Difference]: Start difference. First operand has 370 places, 425 transitions, 5534 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:24:21,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 460 transitions, 6642 flow [2024-06-27 20:24:26,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 460 transitions, 6463 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:26,709 INFO L231 Difference]: Finished difference. Result has 373 places, 427 transitions, 5536 flow [2024-06-27 20:24:26,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5536, PETRI_PLACES=373, PETRI_TRANSITIONS=427} [2024-06-27 20:24:26,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-27 20:24:26,709 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 427 transitions, 5536 flow [2024-06-27 20:24:26,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:26,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:26,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:26,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:24:26,710 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:26,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash -667078675, now seen corresponding path program 21 times [2024-06-27 20:24:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474607264] [2024-06-27 20:24:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:26,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:27,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:27,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474607264] [2024-06-27 20:24:27,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474607264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:27,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:27,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:27,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697521089] [2024-06-27 20:24:27,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:27,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:27,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:28,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:24:28,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 427 transitions, 5536 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:28,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:28,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:24:28,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:30,849 INFO L124 PetriNetUnfolderBase]: 5857/9292 cut-off events. [2024-06-27 20:24:30,849 INFO L125 PetriNetUnfolderBase]: For 3364233/3364233 co-relation queries the response was YES. [2024-06-27 20:24:30,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109606 conditions, 9292 events. 5857/9292 cut-off events. For 3364233/3364233 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 59381 event pairs, 1402 based on Foata normal form. 36/9321 useless extension candidates. Maximal degree in co-relation 109428. Up to 8599 conditions per place. [2024-06-27 20:24:30,987 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 425 selfloop transitions, 32 changer transitions 0/473 dead transitions. [2024-06-27 20:24:30,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 473 transitions, 6823 flow [2024-06-27 20:24:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:24:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:24:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-27 20:24:30,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42768595041322316 [2024-06-27 20:24:30,988 INFO L175 Difference]: Start difference. First operand has 373 places, 427 transitions, 5536 flow. Second operand 11 states and 207 transitions. [2024-06-27 20:24:30,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 473 transitions, 6823 flow [2024-06-27 20:24:35,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 473 transitions, 6656 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:35,071 INFO L231 Difference]: Finished difference. Result has 376 places, 429 transitions, 5637 flow [2024-06-27 20:24:35,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5637, PETRI_PLACES=376, PETRI_TRANSITIONS=429} [2024-06-27 20:24:35,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-27 20:24:35,072 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 429 transitions, 5637 flow [2024-06-27 20:24:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:35,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:35,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:35,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:24:35,072 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:35,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:35,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1231677033, now seen corresponding path program 6 times [2024-06-27 20:24:35,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:35,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085339371] [2024-06-27 20:24:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:35,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:36,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:36,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085339371] [2024-06-27 20:24:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085339371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:36,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:36,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988199242] [2024-06-27 20:24:36,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:36,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:24:36,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 429 transitions, 5637 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:36,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:36,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:24:36,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:39,445 INFO L124 PetriNetUnfolderBase]: 6570/10179 cut-off events. [2024-06-27 20:24:39,445 INFO L125 PetriNetUnfolderBase]: For 3273222/3273222 co-relation queries the response was YES. [2024-06-27 20:24:39,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116345 conditions, 10179 events. 6570/10179 cut-off events. For 3273222/3273222 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 62454 event pairs, 1638 based on Foata normal form. 4/10181 useless extension candidates. Maximal degree in co-relation 116166. Up to 9909 conditions per place. [2024-06-27 20:24:39,756 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 424 selfloop transitions, 29 changer transitions 0/464 dead transitions. [2024-06-27 20:24:39,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 464 transitions, 6759 flow [2024-06-27 20:24:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:24:39,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:24:39,757 INFO L175 Difference]: Start difference. First operand has 376 places, 429 transitions, 5637 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:24:39,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 464 transitions, 6759 flow [2024-06-27 20:24:44,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 464 transitions, 6606 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 20:24:44,864 INFO L231 Difference]: Finished difference. Result has 377 places, 431 transitions, 5688 flow [2024-06-27 20:24:44,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5484, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5688, PETRI_PLACES=377, PETRI_TRANSITIONS=431} [2024-06-27 20:24:44,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-27 20:24:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 431 transitions, 5688 flow [2024-06-27 20:24:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:44,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:24:44,865 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:44,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -658500851, now seen corresponding path program 1 times [2024-06-27 20:24:44,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:44,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184964531] [2024-06-27 20:24:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:45,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:45,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184964531] [2024-06-27 20:24:45,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184964531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:45,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:45,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:45,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971696081] [2024-06-27 20:24:45,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:45,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:45,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:45,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-27 20:24:45,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 431 transitions, 5688 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:45,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:45,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-27 20:24:45,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:48,746 INFO L124 PetriNetUnfolderBase]: 6587/10204 cut-off events. [2024-06-27 20:24:48,746 INFO L125 PetriNetUnfolderBase]: For 3268664/3268664 co-relation queries the response was YES. [2024-06-27 20:24:48,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115961 conditions, 10204 events. 6587/10204 cut-off events. For 3268664/3268664 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 62691 event pairs, 1651 based on Foata normal form. 2/10204 useless extension candidates. Maximal degree in co-relation 115781. Up to 9938 conditions per place. [2024-06-27 20:24:48,900 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 425 selfloop transitions, 31 changer transitions 0/467 dead transitions. [2024-06-27 20:24:48,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 467 transitions, 6730 flow [2024-06-27 20:24:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:24:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:24:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:24:48,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-27 20:24:48,901 INFO L175 Difference]: Start difference. First operand has 377 places, 431 transitions, 5688 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:24:48,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 467 transitions, 6730 flow [2024-06-27 20:24:53,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 467 transitions, 6480 flow, removed 99 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:53,482 INFO L231 Difference]: Finished difference. Result has 379 places, 434 transitions, 5562 flow [2024-06-27 20:24:53,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5438, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5562, PETRI_PLACES=379, PETRI_TRANSITIONS=434} [2024-06-27 20:24:53,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-27 20:24:53,483 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 434 transitions, 5562 flow [2024-06-27 20:24:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:53,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:53,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:24:53,483 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:53,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1035528289, now seen corresponding path program 22 times [2024-06-27 20:24:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:53,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451545113] [2024-06-27 20:24:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:53,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:54,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:54,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451545113] [2024-06-27 20:24:54,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451545113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:54,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:54,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:24:54,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456643066] [2024-06-27 20:24:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:54,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:24:54,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:54,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:24:54,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:24:54,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:24:54,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 434 transitions, 5562 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:54,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:54,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:24:54,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:57,596 INFO L124 PetriNetUnfolderBase]: 5994/9522 cut-off events. [2024-06-27 20:24:57,596 INFO L125 PetriNetUnfolderBase]: For 3347942/3347942 co-relation queries the response was YES. [2024-06-27 20:24:57,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111270 conditions, 9522 events. 5994/9522 cut-off events. For 3347942/3347942 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 61000 event pairs, 1351 based on Foata normal form. 20/9540 useless extension candidates. Maximal degree in co-relation 111089. Up to 8387 conditions per place. [2024-06-27 20:24:57,732 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 346 selfloop transitions, 119 changer transitions 0/481 dead transitions. [2024-06-27 20:24:57,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 481 transitions, 7228 flow [2024-06-27 20:24:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:24:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:24:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 20:24:57,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-27 20:24:57,733 INFO L175 Difference]: Start difference. First operand has 379 places, 434 transitions, 5562 flow. Second operand 11 states and 218 transitions. [2024-06-27 20:24:57,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 481 transitions, 7228 flow [2024-06-27 20:25:02,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 481 transitions, 7121 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 20:25:02,461 INFO L231 Difference]: Finished difference. Result has 380 places, 435 transitions, 5812 flow [2024-06-27 20:25:02,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5812, PETRI_PLACES=380, PETRI_TRANSITIONS=435} [2024-06-27 20:25:02,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-27 20:25:02,462 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 435 transitions, 5812 flow [2024-06-27 20:25:02,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:02,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:02,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:02,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:25:02,463 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:02,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1035532939, now seen corresponding path program 23 times [2024-06-27 20:25:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:02,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152924905] [2024-06-27 20:25:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:02,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:03,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:03,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152924905] [2024-06-27 20:25:03,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152924905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:03,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:03,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:25:03,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201048064] [2024-06-27 20:25:03,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:03,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:25:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:25:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:25:03,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:25:03,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 435 transitions, 5812 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:03,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:03,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:25:03,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:06,568 INFO L124 PetriNetUnfolderBase]: 6028/9591 cut-off events. [2024-06-27 20:25:06,568 INFO L125 PetriNetUnfolderBase]: For 3394758/3394758 co-relation queries the response was YES. [2024-06-27 20:25:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113099 conditions, 9591 events. 6028/9591 cut-off events. For 3394758/3394758 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 61684 event pairs, 1351 based on Foata normal form. 16/9605 useless extension candidates. Maximal degree in co-relation 112917. Up to 8349 conditions per place. [2024-06-27 20:25:06,919 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 349 selfloop transitions, 121 changer transitions 0/486 dead transitions. [2024-06-27 20:25:06,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 486 transitions, 7520 flow [2024-06-27 20:25:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:25:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:25:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 20:25:06,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-27 20:25:06,921 INFO L175 Difference]: Start difference. First operand has 380 places, 435 transitions, 5812 flow. Second operand 11 states and 222 transitions. [2024-06-27 20:25:06,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 486 transitions, 7520 flow [2024-06-27 20:25:11,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 486 transitions, 7213 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 20:25:11,913 INFO L231 Difference]: Finished difference. Result has 382 places, 436 transitions, 5867 flow [2024-06-27 20:25:11,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5505, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5867, PETRI_PLACES=382, PETRI_TRANSITIONS=436} [2024-06-27 20:25:11,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-27 20:25:11,914 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 436 transitions, 5867 flow [2024-06-27 20:25:11,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:11,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:11,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:25:11,914 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:11,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1035648259, now seen corresponding path program 24 times [2024-06-27 20:25:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181606134] [2024-06-27 20:25:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:13,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181606134] [2024-06-27 20:25:13,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181606134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:13,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:13,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:25:13,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105808504] [2024-06-27 20:25:13,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:13,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:25:13,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:25:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:25:13,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:25:13,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 436 transitions, 5867 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:13,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:13,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:25:13,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:16,240 INFO L124 PetriNetUnfolderBase]: 6172/9831 cut-off events. [2024-06-27 20:25:16,240 INFO L125 PetriNetUnfolderBase]: For 3586349/3586349 co-relation queries the response was YES. [2024-06-27 20:25:16,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117929 conditions, 9831 events. 6172/9831 cut-off events. For 3586349/3586349 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 63743 event pairs, 1352 based on Foata normal form. 16/9845 useless extension candidates. Maximal degree in co-relation 117746. Up to 6965 conditions per place. [2024-06-27 20:25:16,386 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 345 selfloop transitions, 128 changer transitions 0/489 dead transitions. [2024-06-27 20:25:16,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 489 transitions, 7723 flow [2024-06-27 20:25:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:25:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:25:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 20:25:16,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 20:25:16,388 INFO L175 Difference]: Start difference. First operand has 382 places, 436 transitions, 5867 flow. Second operand 11 states and 221 transitions. [2024-06-27 20:25:16,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 489 transitions, 7723 flow [2024-06-27 20:25:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 489 transitions, 7391 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:25:21,078 INFO L231 Difference]: Finished difference. Result has 385 places, 438 transitions, 6027 flow [2024-06-27 20:25:21,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5535, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6027, PETRI_PLACES=385, PETRI_TRANSITIONS=438} [2024-06-27 20:25:21,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-27 20:25:21,079 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 438 transitions, 6027 flow [2024-06-27 20:25:21,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:21,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:21,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:21,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:25:21,079 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:25:21,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1513284355, now seen corresponding path program 25 times [2024-06-27 20:25:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:21,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911717548] [2024-06-27 20:25:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:21,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:22,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:22,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911717548] [2024-06-27 20:25:22,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911717548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:22,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:22,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:25:22,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39177174] [2024-06-27 20:25:22,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:22,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:25:22,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:25:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:25:22,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 20:25:22,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 438 transitions, 6027 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:22,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:22,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 20:25:22,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:25,273 INFO L124 PetriNetUnfolderBase]: 6264/9983 cut-off events. [2024-06-27 20:25:25,273 INFO L125 PetriNetUnfolderBase]: For 3721769/3721769 co-relation queries the response was YES. [2024-06-27 20:25:25,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119912 conditions, 9983 events. 6264/9983 cut-off events. For 3721769/3721769 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 65158 event pairs, 1476 based on Foata normal form. 24/10005 useless extension candidates. Maximal degree in co-relation 119728. Up to 9112 conditions per place. [2024-06-27 20:25:25,424 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 404 selfloop transitions, 65 changer transitions 0/485 dead transitions. [2024-06-27 20:25:25,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 485 transitions, 7271 flow [2024-06-27 20:25:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:25:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:25:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:25:25,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-27 20:25:25,425 INFO L175 Difference]: Start difference. First operand has 385 places, 438 transitions, 6027 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:25:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 485 transitions, 7271 flow