./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi008.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/mutex-meet-nonrel/rfi008.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/rfi008.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi008.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-eb4cb34-m [2024-06-21 21:22:57,845 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:22:57,889 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:22:57,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:22:57,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:22:57,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:22:57,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:22:57,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:22:57,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:22:57,907 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:22:57,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:22:57,908 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:22:57,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:22:57,908 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:22:57,909 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:22:57,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:22:57,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:22:57,910 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:22:57,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:22:57,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:22:57,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:22:57,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:22:57,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:22:57,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:22:57,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:22:57,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:22:57,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:22:57,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:22:57,912 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:22:57,912 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:22:57,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:22:57,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:22:57,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:22:57,913 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:22:57,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:22:57,914 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:22:57,914 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:22:57,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:22:57,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:22:57,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:22:57,915 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:22:57,915 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:22:57,915 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:22:57,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:22:58,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:22:58,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:22:58,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:22:58,091 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:22:58,092 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:22:58,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/rfi008.oepc.yml/witness.yml [2024-06-21 21:22:58,226 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:22:58,226 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:22:58,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i [2024-06-21 21:22:59,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:22:59,386 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:22:59,386 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i [2024-06-21 21:22:59,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429e88b02/b877ddd80c674c2c8b7ce31d09e000f5/FLAG34cda6475 [2024-06-21 21:22:59,423 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/429e88b02/b877ddd80c674c2c8b7ce31d09e000f5 [2024-06-21 21:22:59,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:22:59,425 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:22:59,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:22:59,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:22:59,433 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:22:59,434 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:22:58" (1/2) ... [2024-06-21 21:22:59,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2423303f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:22:59, skipping insertion in model container [2024-06-21 21:22:59,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:22:58" (1/2) ... [2024-06-21 21:22:59,437 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@585fb88e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:22:59, skipping insertion in model container [2024-06-21 21:22:59,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:22:59" (2/2) ... [2024-06-21 21:22:59,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2423303f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:22:59, skipping insertion in model container [2024-06-21 21:22:59,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:22:59" (2/2) ... [2024-06-21 21:22:59,439 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:22:59,497 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:22:59,498 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-21 21:22:59,498 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) [2024-06-21 21:22:59,498 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:22:59,499 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-21 21:22:59,536 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:22:59,848 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:22:59,860 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:22:59,977 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:23:00,007 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:23:00,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00 WrapperNode [2024-06-21 21:23:00,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:23:00,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:23:00,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:23:00,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:23:00,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,069 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-21 21:23:00,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:23:00,070 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:23:00,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:23:00,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:23:00,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,082 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,102 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]. [2024-06-21 21:23:00,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:23:00,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:23:00,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:23:00,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:23:00,122 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (1/1) ... [2024-06-21 21:23:00,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:23:00,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:23:00,159 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) [2024-06-21 21:23:00,167 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 [2024-06-21 21:23:00,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:23:00,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:23:00,191 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:23:00,191 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:23:00,191 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:23:00,192 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:23:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:23:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:23:00,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:23:00,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:23:00,193 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:23:00,313 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:23:00,315 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:23:00,543 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:23:00,543 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:23:00,676 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:23:00,676 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:23:00,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:23:00 BoogieIcfgContainer [2024-06-21 21:23:00,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:23:00,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:23:00,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:23:00,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:23:00,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:22:58" (1/4) ... [2024-06-21 21:23:00,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720cf9de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:23:00, skipping insertion in model container [2024-06-21 21:23:00,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:22:59" (2/4) ... [2024-06-21 21:23:00,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720cf9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:23:00, skipping insertion in model container [2024-06-21 21:23:00,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:23:00" (3/4) ... [2024-06-21 21:23:00,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720cf9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:23:00, skipping insertion in model container [2024-06-21 21:23:00,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:23:00" (4/4) ... [2024-06-21 21:23:00,690 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi008.oepc.i [2024-06-21 21:23:00,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:23:00,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 21:23:00,702 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:23:00,735 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:23:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:23:00,784 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 21:23:00,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:23:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:23:00,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:23:00,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 21:23:00,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:23:00,806 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;@229054a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:23:00,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 21:23:00,810 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:23:00,810 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:23:00,811 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:23:00,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:00,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:23:00,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:00,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash 368677949, now seen corresponding path program 1 times [2024-06-21 21:23:00,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021911985] [2024-06-21 21:23:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:00,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:01,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:01,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021911985] [2024-06-21 21:23:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021911985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:01,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:23:01,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436654769] [2024-06-21 21:23:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:01,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:23:01,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:23:01,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:23:01,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 21:23:01,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:01,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:01,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 21:23:01,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:01,705 INFO L124 PetriNetUnfolderBase]: 162/309 cut-off events. [2024-06-21 21:23:01,705 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 21:23:01,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 309 events. 162/309 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1182 event pairs, 97 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 609. Up to 288 conditions per place. [2024-06-21 21:23:01,710 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 21:23:01,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-21 21:23:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:23:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:23:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-06-21 21:23:01,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-06-21 21:23:01,721 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 56 transitions. [2024-06-21 21:23:01,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-21 21:23:01,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 21:23:01,725 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 21:23:01,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 21:23:01,728 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 21:23:01,729 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 21:23:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:01,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:01,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:23:01,730 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:01,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2112218588, now seen corresponding path program 1 times [2024-06-21 21:23:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:01,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663820555] [2024-06-21 21:23:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:02,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:02,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663820555] [2024-06-21 21:23:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663820555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:02,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:02,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:23:02,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008011144] [2024-06-21 21:23:02,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:02,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:23:02,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:23:02,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:23:02,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 21:23:02,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:02,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:02,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 21:23:02,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:02,386 INFO L124 PetriNetUnfolderBase]: 159/306 cut-off events. [2024-06-21 21:23:02,386 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-21 21:23:02,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 306 events. 159/306 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1173 event pairs, 79 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 682. Up to 274 conditions per place. [2024-06-21 21:23:02,391 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 21:23:02,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 157 flow [2024-06-21 21:23:02,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:23:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:23:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-06-21 21:23:02,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 21:23:02,394 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 72 transitions. [2024-06-21 21:23:02,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 157 flow [2024-06-21 21:23:02,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:23:02,398 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 21:23:02,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 21:23:02,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 21:23:02,399 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 21:23:02,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:02,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:02,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:02,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:23:02,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:02,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1054267720, now seen corresponding path program 1 times [2024-06-21 21:23:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:02,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426115431] [2024-06-21 21:23:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:03,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426115431] [2024-06-21 21:23:03,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426115431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:03,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:03,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:23:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887477253] [2024-06-21 21:23:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:23:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:23:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:23:03,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 21:23:03,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:03,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:03,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 21:23:03,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:03,332 INFO L124 PetriNetUnfolderBase]: 156/306 cut-off events. [2024-06-21 21:23:03,332 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-06-21 21:23:03,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 306 events. 156/306 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1153 event pairs, 61 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 750. Up to 260 conditions per place. [2024-06-21 21:23:03,333 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 29 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-06-21 21:23:03,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 205 flow [2024-06-21 21:23:03,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:23:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:23:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 21:23:03,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.567741935483871 [2024-06-21 21:23:03,335 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 88 transitions. [2024-06-21 21:23:03,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 205 flow [2024-06-21 21:23:03,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 21:23:03,337 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-21 21:23:03,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-21 21:23:03,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 21:23:03,338 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-21 21:23:03,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:03,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:03,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:03,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:23:03,338 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:03,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:03,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1256776971, now seen corresponding path program 1 times [2024-06-21 21:23:03,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:03,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548138253] [2024-06-21 21:23:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:04,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:04,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548138253] [2024-06-21 21:23:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548138253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:04,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:04,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:23:04,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373649425] [2024-06-21 21:23:04,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:23:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:04,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:23:04,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:23:04,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:23:04,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:04,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:04,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:23:04,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:04,758 INFO L124 PetriNetUnfolderBase]: 181/345 cut-off events. [2024-06-21 21:23:04,758 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-06-21 21:23:04,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 345 events. 181/345 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1272 event pairs, 47 based on Foata normal form. 2/345 useless extension candidates. Maximal degree in co-relation 925. Up to 285 conditions per place. [2024-06-21 21:23:04,760 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 38 selfloop transitions, 11 changer transitions 0/53 dead transitions. [2024-06-21 21:23:04,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 288 flow [2024-06-21 21:23:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:23:04,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253456221198156 [2024-06-21 21:23:04,762 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:23:04,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 288 flow [2024-06-21 21:23:04,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 268 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:04,764 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 158 flow [2024-06-21 21:23:04,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=158, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-06-21 21:23:04,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-21 21:23:04,765 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 158 flow [2024-06-21 21:23:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:04,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:04,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:04,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:23:04,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:04,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash -905032760, now seen corresponding path program 1 times [2024-06-21 21:23:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:04,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807883029] [2024-06-21 21:23:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807883029] [2024-06-21 21:23:05,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807883029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:05,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:05,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:23:05,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116560042] [2024-06-21 21:23:05,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:05,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:23:05,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:05,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:23:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:23:05,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:05,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:05,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:05,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:05,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:05,377 INFO L124 PetriNetUnfolderBase]: 211/379 cut-off events. [2024-06-21 21:23:05,377 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2024-06-21 21:23:05,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 379 events. 211/379 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1342 event pairs, 56 based on Foata normal form. 1/378 useless extension candidates. Maximal degree in co-relation 1145. Up to 368 conditions per place. [2024-06-21 21:23:05,379 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 32 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2024-06-21 21:23:05,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 252 flow [2024-06-21 21:23:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:23:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:23:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-06-21 21:23:05,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 21:23:05,381 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 158 flow. Second operand 5 states and 61 transitions. [2024-06-21 21:23:05,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 252 flow [2024-06-21 21:23:05,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 229 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:05,383 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 162 flow [2024-06-21 21:23:05,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-21 21:23:05,383 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 21:23:05,384 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 162 flow [2024-06-21 21:23:05,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:05,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:05,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:05,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:23:05,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:05,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1405231846, now seen corresponding path program 1 times [2024-06-21 21:23:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763317701] [2024-06-21 21:23:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:06,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:06,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763317701] [2024-06-21 21:23:06,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763317701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:06,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:06,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340256801] [2024-06-21 21:23:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:06,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:06,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:23:06,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:06,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:06,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:23:06,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:06,874 INFO L124 PetriNetUnfolderBase]: 190/354 cut-off events. [2024-06-21 21:23:06,875 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2024-06-21 21:23:06,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 354 events. 190/354 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1264 event pairs, 34 based on Foata normal form. 4/356 useless extension candidates. Maximal degree in co-relation 1101. Up to 272 conditions per place. [2024-06-21 21:23:06,887 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 39 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-21 21:23:06,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 308 flow [2024-06-21 21:23:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 21:23:06,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 21:23:06,889 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 162 flow. Second operand 8 states and 124 transitions. [2024-06-21 21:23:06,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 308 flow [2024-06-21 21:23:06,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 297 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:06,893 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 169 flow [2024-06-21 21:23:06,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=169, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-06-21 21:23:06,895 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:23:06,895 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 169 flow [2024-06-21 21:23:06,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:06,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:06,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:23:06,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2008756451, now seen corresponding path program 1 times [2024-06-21 21:23:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:06,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650634851] [2024-06-21 21:23:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:07,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:07,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650634851] [2024-06-21 21:23:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650634851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:07,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:07,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:23:07,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842341711] [2024-06-21 21:23:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:23:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:23:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:23:07,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:07,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 169 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:07,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:07,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:07,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:07,620 INFO L124 PetriNetUnfolderBase]: 201/362 cut-off events. [2024-06-21 21:23:07,620 INFO L125 PetriNetUnfolderBase]: For 931/931 co-relation queries the response was YES. [2024-06-21 21:23:07,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 362 events. 201/362 cut-off events. For 931/931 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1236 event pairs, 49 based on Foata normal form. 3/363 useless extension candidates. Maximal degree in co-relation 1194. Up to 342 conditions per place. [2024-06-21 21:23:07,622 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 34 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-21 21:23:07,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 279 flow [2024-06-21 21:23:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:23:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:23:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-06-21 21:23:07,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 21:23:07,623 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 169 flow. Second operand 6 states and 71 transitions. [2024-06-21 21:23:07,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 279 flow [2024-06-21 21:23:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 249 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:07,625 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 172 flow [2024-06-21 21:23:07,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-06-21 21:23:07,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:23:07,626 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 172 flow [2024-06-21 21:23:07,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:07,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:07,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:07,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:23:07,626 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:07,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash -921354087, now seen corresponding path program 1 times [2024-06-21 21:23:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:07,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568334115] [2024-06-21 21:23:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:07,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:08,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:08,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568334115] [2024-06-21 21:23:08,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568334115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:08,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:08,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:23:08,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654170407] [2024-06-21 21:23:08,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:23:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:23:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:23:08,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:08,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:08,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:08,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:08,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:08,379 INFO L124 PetriNetUnfolderBase]: 213/383 cut-off events. [2024-06-21 21:23:08,380 INFO L125 PetriNetUnfolderBase]: For 1155/1155 co-relation queries the response was YES. [2024-06-21 21:23:08,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1323 conditions, 383 events. 213/383 cut-off events. For 1155/1155 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1313 event pairs, 50 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 1301. Up to 359 conditions per place. [2024-06-21 21:23:08,382 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2024-06-21 21:23:08,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 339 flow [2024-06-21 21:23:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 21:23:08,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 21:23:08,383 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 172 flow. Second operand 7 states and 80 transitions. [2024-06-21 21:23:08,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 339 flow [2024-06-21 21:23:08,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 320 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:08,385 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 240 flow [2024-06-21 21:23:08,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-21 21:23:08,387 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-21 21:23:08,387 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 240 flow [2024-06-21 21:23:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:08,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:08,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:08,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:23:08,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1265593527, now seen corresponding path program 2 times [2024-06-21 21:23:08,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807351683] [2024-06-21 21:23:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:08,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:08,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807351683] [2024-06-21 21:23:08,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807351683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:08,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:08,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:23:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624039041] [2024-06-21 21:23:08,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:08,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:23:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:08,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:23:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:23:08,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:08,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:08,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:08,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:08,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:09,028 INFO L124 PetriNetUnfolderBase]: 211/380 cut-off events. [2024-06-21 21:23:09,028 INFO L125 PetriNetUnfolderBase]: For 1471/1471 co-relation queries the response was YES. [2024-06-21 21:23:09,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 380 events. 211/380 cut-off events. For 1471/1471 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1302 event pairs, 49 based on Foata normal form. 1/379 useless extension candidates. Maximal degree in co-relation 1383. Up to 365 conditions per place. [2024-06-21 21:23:09,030 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 38 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-06-21 21:23:09,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 346 flow [2024-06-21 21:23:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:23:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:23:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-21 21:23:09,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:23:09,031 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 240 flow. Second operand 6 states and 69 transitions. [2024-06-21 21:23:09,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 346 flow [2024-06-21 21:23:09,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 338 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 21:23:09,034 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 255 flow [2024-06-21 21:23:09,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=255, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-06-21 21:23:09,034 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-21 21:23:09,034 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 255 flow [2024-06-21 21:23:09,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:09,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:09,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:09,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:23:09,035 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:09,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1114817301, now seen corresponding path program 3 times [2024-06-21 21:23:09,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:09,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119888568] [2024-06-21 21:23:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:09,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119888568] [2024-06-21 21:23:09,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119888568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:09,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:09,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:23:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448989586] [2024-06-21 21:23:09,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:09,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:23:09,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:23:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:23:09,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:09,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:09,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:09,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:09,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:09,700 INFO L124 PetriNetUnfolderBase]: 209/377 cut-off events. [2024-06-21 21:23:09,700 INFO L125 PetriNetUnfolderBase]: For 1819/1819 co-relation queries the response was YES. [2024-06-21 21:23:09,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 377 events. 209/377 cut-off events. For 1819/1819 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1296 event pairs, 49 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1415. Up to 345 conditions per place. [2024-06-21 21:23:09,702 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 17 changer transitions 0/57 dead transitions. [2024-06-21 21:23:09,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 414 flow [2024-06-21 21:23:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 21:23:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:23:09,704 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 255 flow. Second operand 7 states and 84 transitions. [2024-06-21 21:23:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 414 flow [2024-06-21 21:23:09,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 397 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:09,706 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 318 flow [2024-06-21 21:23:09,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-06-21 21:23:09,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-21 21:23:09,707 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 318 flow [2024-06-21 21:23:09,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:09,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:09,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:09,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:23:09,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:09,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1767584361, now seen corresponding path program 1 times [2024-06-21 21:23:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:09,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425362102] [2024-06-21 21:23:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:09,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:10,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:10,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425362102] [2024-06-21 21:23:10,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425362102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:10,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:10,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:10,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382417901] [2024-06-21 21:23:10,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:10,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:10,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:10,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:10,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:10,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:10,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:10,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:10,638 INFO L124 PetriNetUnfolderBase]: 212/382 cut-off events. [2024-06-21 21:23:10,638 INFO L125 PetriNetUnfolderBase]: For 2283/2283 co-relation queries the response was YES. [2024-06-21 21:23:10,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570 conditions, 382 events. 212/382 cut-off events. For 2283/2283 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1340 event pairs, 49 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1540. Up to 327 conditions per place. [2024-06-21 21:23:10,641 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 41 selfloop transitions, 21 changer transitions 0/64 dead transitions. [2024-06-21 21:23:10,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 520 flow [2024-06-21 21:23:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 21:23:10,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-21 21:23:10,642 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 318 flow. Second operand 7 states and 88 transitions. [2024-06-21 21:23:10,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 520 flow [2024-06-21 21:23:10,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 488 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:10,645 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 361 flow [2024-06-21 21:23:10,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-06-21 21:23:10,645 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 21:23:10,646 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 361 flow [2024-06-21 21:23:10,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:10,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:10,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:10,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:23:10,646 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:10,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1502795314, now seen corresponding path program 1 times [2024-06-21 21:23:10,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741294845] [2024-06-21 21:23:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:11,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:11,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741294845] [2024-06-21 21:23:11,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741294845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:11,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:11,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987910204] [2024-06-21 21:23:11,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:11,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:11,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:11,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:11,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:11,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:11,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:11,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:11,519 INFO L124 PetriNetUnfolderBase]: 236/421 cut-off events. [2024-06-21 21:23:11,519 INFO L125 PetriNetUnfolderBase]: For 3071/3071 co-relation queries the response was YES. [2024-06-21 21:23:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 421 events. 236/421 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1491 event pairs, 53 based on Foata normal form. 3/422 useless extension candidates. Maximal degree in co-relation 1779. Up to 370 conditions per place. [2024-06-21 21:23:11,540 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 51 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-21 21:23:11,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 577 flow [2024-06-21 21:23:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 21:23:11,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 21:23:11,543 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 361 flow. Second operand 8 states and 95 transitions. [2024-06-21 21:23:11,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 577 flow [2024-06-21 21:23:11,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 546 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:11,551 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 412 flow [2024-06-21 21:23:11,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=412, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-06-21 21:23:11,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-21 21:23:11,551 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 412 flow [2024-06-21 21:23:11,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:11,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:11,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:11,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:23:11,552 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:11,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1502795097, now seen corresponding path program 2 times [2024-06-21 21:23:11,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:11,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096369842] [2024-06-21 21:23:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:11,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:12,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:12,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096369842] [2024-06-21 21:23:12,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096369842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:12,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:12,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132967795] [2024-06-21 21:23:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:12,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:12,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:12,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:12,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:12,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:12,405 INFO L124 PetriNetUnfolderBase]: 239/426 cut-off events. [2024-06-21 21:23:12,405 INFO L125 PetriNetUnfolderBase]: For 3457/3457 co-relation queries the response was YES. [2024-06-21 21:23:12,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 426 events. 239/426 cut-off events. For 3457/3457 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1511 event pairs, 50 based on Foata normal form. 1/425 useless extension candidates. Maximal degree in co-relation 1926. Up to 389 conditions per place. [2024-06-21 21:23:12,408 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 47 selfloop transitions, 19 changer transitions 0/68 dead transitions. [2024-06-21 21:23:12,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 68 transitions, 578 flow [2024-06-21 21:23:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-21 21:23:12,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-21 21:23:12,409 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 412 flow. Second operand 7 states and 83 transitions. [2024-06-21 21:23:12,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 68 transitions, 578 flow [2024-06-21 21:23:12,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 562 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:12,413 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 458 flow [2024-06-21 21:23:12,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=458, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-06-21 21:23:12,414 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-06-21 21:23:12,414 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 458 flow [2024-06-21 21:23:12,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:12,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:12,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:12,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:23:12,415 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:12,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash -578692951, now seen corresponding path program 3 times [2024-06-21 21:23:12,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:12,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537125443] [2024-06-21 21:23:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:12,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537125443] [2024-06-21 21:23:12,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537125443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:12,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:12,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239691697] [2024-06-21 21:23:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:12,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:13,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:13,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:13,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:13,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:13,221 INFO L124 PetriNetUnfolderBase]: 237/423 cut-off events. [2024-06-21 21:23:13,221 INFO L125 PetriNetUnfolderBase]: For 3909/3909 co-relation queries the response was YES. [2024-06-21 21:23:13,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 423 events. 237/423 cut-off events. For 3909/3909 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1493 event pairs, 51 based on Foata normal form. 1/422 useless extension candidates. Maximal degree in co-relation 1965. Up to 405 conditions per place. [2024-06-21 21:23:13,224 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 53 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-21 21:23:13,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 66 transitions, 600 flow [2024-06-21 21:23:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 21:23:13,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 21:23:13,225 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 458 flow. Second operand 7 states and 78 transitions. [2024-06-21 21:23:13,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 66 transitions, 600 flow [2024-06-21 21:23:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 556 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:13,230 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 441 flow [2024-06-21 21:23:13,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=7, PETRI_FLOW=441, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-21 21:23:13,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 21:23:13,231 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 441 flow [2024-06-21 21:23:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:13,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:13,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:23:13,232 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:13,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1974654658, now seen corresponding path program 2 times [2024-06-21 21:23:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152692460] [2024-06-21 21:23:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:13,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:13,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152692460] [2024-06-21 21:23:13,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152692460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:13,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:13,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922016392] [2024-06-21 21:23:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:13,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:13,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:13,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 441 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:13,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:13,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:13,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:14,017 INFO L124 PetriNetUnfolderBase]: 246/438 cut-off events. [2024-06-21 21:23:14,017 INFO L125 PetriNetUnfolderBase]: For 4655/4655 co-relation queries the response was YES. [2024-06-21 21:23:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 438 events. 246/438 cut-off events. For 4655/4655 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1560 event pairs, 51 based on Foata normal form. 3/439 useless extension candidates. Maximal degree in co-relation 2044. Up to 414 conditions per place. [2024-06-21 21:23:14,020 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-21 21:23:14,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 613 flow [2024-06-21 21:23:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 21:23:14,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 21:23:14,021 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 441 flow. Second operand 7 states and 80 transitions. [2024-06-21 21:23:14,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 613 flow [2024-06-21 21:23:14,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 571 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:14,026 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 446 flow [2024-06-21 21:23:14,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=446, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-21 21:23:14,027 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 21:23:14,027 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 446 flow [2024-06-21 21:23:14,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:14,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:14,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:14,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:23:14,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:14,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1773298498, now seen corresponding path program 3 times [2024-06-21 21:23:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812155349] [2024-06-21 21:23:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812155349] [2024-06-21 21:23:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812155349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:14,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801810943] [2024-06-21 21:23:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:14,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:14,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:14,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:14,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 446 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:14,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:14,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:14,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:14,803 INFO L124 PetriNetUnfolderBase]: 240/429 cut-off events. [2024-06-21 21:23:14,803 INFO L125 PetriNetUnfolderBase]: For 4942/4942 co-relation queries the response was YES. [2024-06-21 21:23:14,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2037 conditions, 429 events. 240/429 cut-off events. For 4942/4942 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1522 event pairs, 49 based on Foata normal form. 3/430 useless extension candidates. Maximal degree in co-relation 2000. Up to 393 conditions per place. [2024-06-21 21:23:14,806 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 56 selfloop transitions, 14 changer transitions 0/72 dead transitions. [2024-06-21 21:23:14,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 72 transitions, 612 flow [2024-06-21 21:23:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:23:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:23:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 21:23:14,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:23:14,808 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 446 flow. Second operand 7 states and 84 transitions. [2024-06-21 21:23:14,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 72 transitions, 612 flow [2024-06-21 21:23:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 579 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:14,812 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 446 flow [2024-06-21 21:23:14,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=446, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-06-21 21:23:14,813 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-21 21:23:14,813 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 446 flow [2024-06-21 21:23:14,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:14,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:14,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:14,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:23:14,814 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:14,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:14,814 INFO L85 PathProgramCache]: Analyzing trace with hash -199597024, now seen corresponding path program 4 times [2024-06-21 21:23:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:14,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824983055] [2024-06-21 21:23:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:14,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824983055] [2024-06-21 21:23:15,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824983055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:15,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:15,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:23:15,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068741606] [2024-06-21 21:23:15,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:15,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:23:15,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:23:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:23:15,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:15,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 446 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:15,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:15,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:15,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:15,609 INFO L124 PetriNetUnfolderBase]: 244/436 cut-off events. [2024-06-21 21:23:15,610 INFO L125 PetriNetUnfolderBase]: For 5388/5388 co-relation queries the response was YES. [2024-06-21 21:23:15,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 436 events. 244/436 cut-off events. For 5388/5388 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1568 event pairs, 49 based on Foata normal form. 3/437 useless extension candidates. Maximal degree in co-relation 2042. Up to 383 conditions per place. [2024-06-21 21:23:15,613 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 56 selfloop transitions, 22 changer transitions 0/80 dead transitions. [2024-06-21 21:23:15,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 680 flow [2024-06-21 21:23:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 21:23:15,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 21:23:15,614 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 446 flow. Second operand 8 states and 97 transitions. [2024-06-21 21:23:15,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 680 flow [2024-06-21 21:23:15,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 626 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:15,620 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 512 flow [2024-06-21 21:23:15,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=512, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2024-06-21 21:23:15,620 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 21:23:15,621 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 512 flow [2024-06-21 21:23:15,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:15,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:15,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:15,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:23:15,621 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:15,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 731248028, now seen corresponding path program 1 times [2024-06-21 21:23:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605817810] [2024-06-21 21:23:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:16,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:16,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605817810] [2024-06-21 21:23:16,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605817810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:16,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:16,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717165588] [2024-06-21 21:23:16,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:16,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:16,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:16,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:16,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 512 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:16,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:16,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:16,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:16,843 INFO L124 PetriNetUnfolderBase]: 247/441 cut-off events. [2024-06-21 21:23:16,843 INFO L125 PetriNetUnfolderBase]: For 5721/5721 co-relation queries the response was YES. [2024-06-21 21:23:16,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 441 events. 247/441 cut-off events. For 5721/5721 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1578 event pairs, 46 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 2178. Up to 397 conditions per place. [2024-06-21 21:23:16,846 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 67 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-21 21:23:16,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 738 flow [2024-06-21 21:23:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:23:16,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:23:16,848 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 512 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:23:16,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 738 flow [2024-06-21 21:23:16,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 696 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:16,853 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 525 flow [2024-06-21 21:23:16,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=525, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2024-06-21 21:23:16,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-21 21:23:16,854 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 525 flow [2024-06-21 21:23:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:16,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:16,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:16,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:23:16,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:16,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:16,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1039458904, now seen corresponding path program 2 times [2024-06-21 21:23:16,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031652482] [2024-06-21 21:23:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:17,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031652482] [2024-06-21 21:23:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031652482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070251588] [2024-06-21 21:23:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:17,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:17,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:17,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 525 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:17,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:17,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:17,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:17,848 INFO L124 PetriNetUnfolderBase]: 258/459 cut-off events. [2024-06-21 21:23:17,848 INFO L125 PetriNetUnfolderBase]: For 6599/6599 co-relation queries the response was YES. [2024-06-21 21:23:17,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2350 conditions, 459 events. 258/459 cut-off events. For 6599/6599 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1685 event pairs, 48 based on Foata normal form. 2/459 useless extension candidates. Maximal degree in co-relation 2309. Up to 360 conditions per place. [2024-06-21 21:23:17,851 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 60 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-21 21:23:17,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 875 flow [2024-06-21 21:23:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 21:23:17,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-21 21:23:17,855 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 525 flow. Second operand 8 states and 103 transitions. [2024-06-21 21:23:17,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 875 flow [2024-06-21 21:23:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 836 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:17,861 INFO L231 Difference]: Finished difference. Result has 87 places, 76 transitions, 603 flow [2024-06-21 21:23:17,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=603, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2024-06-21 21:23:17,861 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 21:23:17,862 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 603 flow [2024-06-21 21:23:17,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:17,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:17,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:17,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:23:17,862 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:17,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1039458718, now seen corresponding path program 1 times [2024-06-21 21:23:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:17,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096900441] [2024-06-21 21:23:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:18,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096900441] [2024-06-21 21:23:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096900441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:18,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:18,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24102824] [2024-06-21 21:23:18,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:18,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:18,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:18,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 603 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:18,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:18,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:18,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:18,865 INFO L124 PetriNetUnfolderBase]: 271/480 cut-off events. [2024-06-21 21:23:18,865 INFO L125 PetriNetUnfolderBase]: For 7653/7653 co-relation queries the response was YES. [2024-06-21 21:23:18,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2541 conditions, 480 events. 271/480 cut-off events. For 7653/7653 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1786 event pairs, 52 based on Foata normal form. 1/479 useless extension candidates. Maximal degree in co-relation 2499. Up to 346 conditions per place. [2024-06-21 21:23:18,868 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 35 changer transitions 0/97 dead transitions. [2024-06-21 21:23:18,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 97 transitions, 905 flow [2024-06-21 21:23:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 21:23:18,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:23:18,869 INFO L175 Difference]: Start difference. First operand has 87 places, 76 transitions, 603 flow. Second operand 8 states and 104 transitions. [2024-06-21 21:23:18,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 97 transitions, 905 flow [2024-06-21 21:23:18,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 97 transitions, 872 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:18,876 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 701 flow [2024-06-21 21:23:18,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=701, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2024-06-21 21:23:18,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-21 21:23:18,877 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 701 flow [2024-06-21 21:23:18,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:18,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:18,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:18,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:23:18,877 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:18,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1034810578, now seen corresponding path program 2 times [2024-06-21 21:23:18,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:18,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626519089] [2024-06-21 21:23:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:18,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:19,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:19,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626519089] [2024-06-21 21:23:19,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626519089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:19,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:19,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004683811] [2024-06-21 21:23:19,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:19,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:19,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:19,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 701 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:19,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:19,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:19,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:19,830 INFO L124 PetriNetUnfolderBase]: 280/495 cut-off events. [2024-06-21 21:23:19,830 INFO L125 PetriNetUnfolderBase]: For 8936/8936 co-relation queries the response was YES. [2024-06-21 21:23:19,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 495 events. 280/495 cut-off events. For 8936/8936 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1858 event pairs, 49 based on Foata normal form. 3/496 useless extension candidates. Maximal degree in co-relation 2748. Up to 407 conditions per place. [2024-06-21 21:23:19,833 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 65 selfloop transitions, 31 changer transitions 0/98 dead transitions. [2024-06-21 21:23:19,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 98 transitions, 962 flow [2024-06-21 21:23:19,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 21:23:19,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 21:23:19,834 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 701 flow. Second operand 8 states and 100 transitions. [2024-06-21 21:23:19,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 98 transitions, 962 flow [2024-06-21 21:23:19,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 912 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:23:19,843 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 754 flow [2024-06-21 21:23:19,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=754, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2024-06-21 21:23:19,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-21 21:23:19,843 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 754 flow [2024-06-21 21:23:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:19,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:19,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:19,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:23:19,844 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:19,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1034817274, now seen corresponding path program 3 times [2024-06-21 21:23:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671093590] [2024-06-21 21:23:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:20,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:20,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671093590] [2024-06-21 21:23:20,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671093590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:20,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:20,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036187093] [2024-06-21 21:23:20,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:20,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:20,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:20,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 84 transitions, 754 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:20,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:20,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:20,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:20,782 INFO L124 PetriNetUnfolderBase]: 286/505 cut-off events. [2024-06-21 21:23:20,782 INFO L125 PetriNetUnfolderBase]: For 9552/9552 co-relation queries the response was YES. [2024-06-21 21:23:20,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 505 events. 286/505 cut-off events. For 9552/9552 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1906 event pairs, 52 based on Foata normal form. 2/505 useless extension candidates. Maximal degree in co-relation 2902. Up to 462 conditions per place. [2024-06-21 21:23:20,785 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 73 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-21 21:23:20,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 988 flow [2024-06-21 21:23:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:20,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-21 21:23:20,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:23:20,786 INFO L175 Difference]: Start difference. First operand has 97 places, 84 transitions, 754 flow. Second operand 8 states and 93 transitions. [2024-06-21 21:23:20,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 988 flow [2024-06-21 21:23:20,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 926 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:20,796 INFO L231 Difference]: Finished difference. Result has 99 places, 86 transitions, 761 flow [2024-06-21 21:23:20,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=761, PETRI_PLACES=99, PETRI_TRANSITIONS=86} [2024-06-21 21:23:20,797 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 21:23:20,797 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 86 transitions, 761 flow [2024-06-21 21:23:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:20,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:20,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:20,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:23:20,797 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:20,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -657991310, now seen corresponding path program 3 times [2024-06-21 21:23:20,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:20,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676340441] [2024-06-21 21:23:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:21,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:21,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676340441] [2024-06-21 21:23:21,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676340441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:21,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705460372] [2024-06-21 21:23:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:21,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:21,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:21,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 761 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:21,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:21,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:21,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:21,802 INFO L124 PetriNetUnfolderBase]: 289/510 cut-off events. [2024-06-21 21:23:21,802 INFO L125 PetriNetUnfolderBase]: For 10172/10172 co-relation queries the response was YES. [2024-06-21 21:23:21,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 510 events. 289/510 cut-off events. For 10172/10172 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1937 event pairs, 49 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 2949. Up to 414 conditions per place. [2024-06-21 21:23:21,806 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 33 changer transitions 0/102 dead transitions. [2024-06-21 21:23:21,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 1019 flow [2024-06-21 21:23:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-21 21:23:21,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 21:23:21,807 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 761 flow. Second operand 8 states and 102 transitions. [2024-06-21 21:23:21,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 1019 flow [2024-06-21 21:23:21,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 102 transitions, 972 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:21,818 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 805 flow [2024-06-21 21:23:21,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=805, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2024-06-21 21:23:21,819 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 21:23:21,819 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 805 flow [2024-06-21 21:23:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:21,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:21,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:21,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:23:21,820 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:21,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1256385208, now seen corresponding path program 4 times [2024-06-21 21:23:21,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:21,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843594739] [2024-06-21 21:23:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:22,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843594739] [2024-06-21 21:23:22,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843594739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:22,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216785074] [2024-06-21 21:23:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:22,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:22,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 805 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:22,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:22,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:22,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:22,753 INFO L124 PetriNetUnfolderBase]: 287/507 cut-off events. [2024-06-21 21:23:22,753 INFO L125 PetriNetUnfolderBase]: For 10800/10800 co-relation queries the response was YES. [2024-06-21 21:23:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3039 conditions, 507 events. 287/507 cut-off events. For 10800/10800 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1910 event pairs, 54 based on Foata normal form. 1/506 useless extension candidates. Maximal degree in co-relation 2990. Up to 486 conditions per place. [2024-06-21 21:23:22,757 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 82 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2024-06-21 21:23:22,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 97 transitions, 1031 flow [2024-06-21 21:23:22,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:23:22,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 21:23:22,760 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 805 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:23:22,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 97 transitions, 1031 flow [2024-06-21 21:23:22,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 97 transitions, 962 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:22,773 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 791 flow [2024-06-21 21:23:22,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2024-06-21 21:23:22,774 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-06-21 21:23:22,774 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 791 flow [2024-06-21 21:23:22,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:22,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:22,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:22,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:23:22,774 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:22,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash -485494910, now seen corresponding path program 4 times [2024-06-21 21:23:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:22,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24546192] [2024-06-21 21:23:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:22,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:23,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:23,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24546192] [2024-06-21 21:23:23,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24546192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:23,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:23,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770907794] [2024-06-21 21:23:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:23,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:23,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:23,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:23,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 791 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:23,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:23,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:23,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:23,681 INFO L124 PetriNetUnfolderBase]: 296/522 cut-off events. [2024-06-21 21:23:23,681 INFO L125 PetriNetUnfolderBase]: For 12188/12188 co-relation queries the response was YES. [2024-06-21 21:23:23,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 522 events. 296/522 cut-off events. For 12188/12188 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1992 event pairs, 52 based on Foata normal form. 3/523 useless extension candidates. Maximal degree in co-relation 3071. Up to 475 conditions per place. [2024-06-21 21:23:23,684 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-06-21 21:23:23,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 105 transitions, 1058 flow [2024-06-21 21:23:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 21:23:23,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 21:23:23,686 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 791 flow. Second operand 8 states and 95 transitions. [2024-06-21 21:23:23,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 105 transitions, 1058 flow [2024-06-21 21:23:23,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 105 transitions, 1021 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:23,698 INFO L231 Difference]: Finished difference. Result has 105 places, 93 transitions, 836 flow [2024-06-21 21:23:23,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=105, PETRI_TRANSITIONS=93} [2024-06-21 21:23:23,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2024-06-21 21:23:23,698 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 93 transitions, 836 flow [2024-06-21 21:23:23,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:23,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:23,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:23,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:23:23,699 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:23,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:23,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1084761594, now seen corresponding path program 1 times [2024-06-21 21:23:23,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:23,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507227004] [2024-06-21 21:23:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507227004] [2024-06-21 21:23:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507227004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:24,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:24,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214075738] [2024-06-21 21:23:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:24,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:24,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:24,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 93 transitions, 836 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:24,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:24,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:24,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:24,560 INFO L124 PetriNetUnfolderBase]: 292/516 cut-off events. [2024-06-21 21:23:24,560 INFO L125 PetriNetUnfolderBase]: For 12323/12323 co-relation queries the response was YES. [2024-06-21 21:23:24,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 516 events. 292/516 cut-off events. For 12323/12323 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1971 event pairs, 53 based on Foata normal form. 2/516 useless extension candidates. Maximal degree in co-relation 3065. Up to 487 conditions per place. [2024-06-21 21:23:24,564 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 89 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2024-06-21 21:23:24,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 104 transitions, 1082 flow [2024-06-21 21:23:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:23:24,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 21:23:24,567 INFO L175 Difference]: Start difference. First operand has 105 places, 93 transitions, 836 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:23:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 104 transitions, 1082 flow [2024-06-21 21:23:24,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 104 transitions, 1033 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:24,579 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 844 flow [2024-06-21 21:23:24,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=844, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2024-06-21 21:23:24,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 21:23:24,580 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 844 flow [2024-06-21 21:23:24,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:24,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:24,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:23:24,580 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:24,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1084752976, now seen corresponding path program 5 times [2024-06-21 21:23:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156431887] [2024-06-21 21:23:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:25,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:25,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156431887] [2024-06-21 21:23:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156431887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:25,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:25,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772618973] [2024-06-21 21:23:25,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:25,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:25,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:25,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:25,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:25,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:25,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:25,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:25,447 INFO L124 PetriNetUnfolderBase]: 291/515 cut-off events. [2024-06-21 21:23:25,448 INFO L125 PetriNetUnfolderBase]: For 12841/12841 co-relation queries the response was YES. [2024-06-21 21:23:25,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 515 events. 291/515 cut-off events. For 12841/12841 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1981 event pairs, 52 based on Foata normal form. 3/516 useless extension candidates. Maximal degree in co-relation 3039. Up to 480 conditions per place. [2024-06-21 21:23:25,451 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 90 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-06-21 21:23:25,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 107 transitions, 1102 flow [2024-06-21 21:23:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-21 21:23:25,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-21 21:23:25,453 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 844 flow. Second operand 8 states and 91 transitions. [2024-06-21 21:23:25,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 107 transitions, 1102 flow [2024-06-21 21:23:25,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 1058 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:25,465 INFO L231 Difference]: Finished difference. Result has 109 places, 97 transitions, 865 flow [2024-06-21 21:23:25,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=865, PETRI_PLACES=109, PETRI_TRANSITIONS=97} [2024-06-21 21:23:25,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 21:23:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 97 transitions, 865 flow [2024-06-21 21:23:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:25,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:23:25,466 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:25,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 369805234, now seen corresponding path program 6 times [2024-06-21 21:23:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:25,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835028923] [2024-06-21 21:23:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:26,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835028923] [2024-06-21 21:23:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835028923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:26,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:26,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:23:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393293989] [2024-06-21 21:23:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:26,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:23:26,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:23:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:23:26,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:26,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 97 transitions, 865 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:26,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:26,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:26,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:26,537 INFO L124 PetriNetUnfolderBase]: 289/512 cut-off events. [2024-06-21 21:23:26,538 INFO L125 PetriNetUnfolderBase]: For 12700/12700 co-relation queries the response was YES. [2024-06-21 21:23:26,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 512 events. 289/512 cut-off events. For 12700/12700 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1966 event pairs, 50 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 3020. Up to 448 conditions per place. [2024-06-21 21:23:26,540 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 80 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2024-06-21 21:23:26,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 1099 flow [2024-06-21 21:23:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 21:23:26,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:23:26,542 INFO L175 Difference]: Start difference. First operand has 109 places, 97 transitions, 865 flow. Second operand 8 states and 94 transitions. [2024-06-21 21:23:26,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 1099 flow [2024-06-21 21:23:26,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 107 transitions, 1052 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:26,555 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 873 flow [2024-06-21 21:23:26,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=873, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-06-21 21:23:26,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-21 21:23:26,555 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 873 flow [2024-06-21 21:23:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:26,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:26,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:23:26,556 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:26,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1829763304, now seen corresponding path program 1 times [2024-06-21 21:23:26,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:26,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383172226] [2024-06-21 21:23:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:27,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383172226] [2024-06-21 21:23:27,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383172226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:27,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:27,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:27,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550166490] [2024-06-21 21:23:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:27,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:27,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:27,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:27,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:27,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 873 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:27,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:27,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:27,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:27,840 INFO L124 PetriNetUnfolderBase]: 286/507 cut-off events. [2024-06-21 21:23:27,841 INFO L125 PetriNetUnfolderBase]: For 13193/13193 co-relation queries the response was YES. [2024-06-21 21:23:27,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 507 events. 286/507 cut-off events. For 13193/13193 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1920 event pairs, 51 based on Foata normal form. 2/507 useless extension candidates. Maximal degree in co-relation 2978. Up to 480 conditions per place. [2024-06-21 21:23:27,843 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 92 selfloop transitions, 12 changer transitions 0/106 dead transitions. [2024-06-21 21:23:27,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 106 transitions, 1101 flow [2024-06-21 21:23:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:23:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:23:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:23:27,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 21:23:27,844 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 873 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:23:27,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 106 transitions, 1101 flow [2024-06-21 21:23:27,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 106 transitions, 1006 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:27,856 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 806 flow [2024-06-21 21:23:27,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-06-21 21:23:27,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 21:23:27,857 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 806 flow [2024-06-21 21:23:27,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:27,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:27,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:27,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:23:27,857 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:27,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2136365258, now seen corresponding path program 1 times [2024-06-21 21:23:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:27,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332828932] [2024-06-21 21:23:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:27,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:28,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:28,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332828932] [2024-06-21 21:23:28,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332828932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:28,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:28,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:28,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637949328] [2024-06-21 21:23:28,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:28,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:28,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:28,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:28,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:28,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 806 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:28,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:28,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:28,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:29,215 INFO L124 PetriNetUnfolderBase]: 289/512 cut-off events. [2024-06-21 21:23:29,215 INFO L125 PetriNetUnfolderBase]: For 13562/13562 co-relation queries the response was YES. [2024-06-21 21:23:29,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 512 events. 289/512 cut-off events. For 13562/13562 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1953 event pairs, 48 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 2948. Up to 452 conditions per place. [2024-06-21 21:23:29,218 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 96 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-21 21:23:29,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 120 transitions, 1182 flow [2024-06-21 21:23:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:23:29,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:23:29,219 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 806 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:23:29,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 120 transitions, 1182 flow [2024-06-21 21:23:29,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 120 transitions, 1154 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:29,232 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 845 flow [2024-06-21 21:23:29,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=845, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2024-06-21 21:23:29,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 21:23:29,233 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 845 flow [2024-06-21 21:23:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:29,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:29,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:23:29,234 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:29,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:29,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2132794213, now seen corresponding path program 1 times [2024-06-21 21:23:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354333127] [2024-06-21 21:23:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:30,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354333127] [2024-06-21 21:23:30,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354333127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:30,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:30,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:30,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263907551] [2024-06-21 21:23:30,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:30,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:30,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:30,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:30,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:30,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 845 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:30,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:30,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:30,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:30,337 INFO L124 PetriNetUnfolderBase]: 296/524 cut-off events. [2024-06-21 21:23:30,338 INFO L125 PetriNetUnfolderBase]: For 14853/14853 co-relation queries the response was YES. [2024-06-21 21:23:30,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 524 events. 296/524 cut-off events. For 14853/14853 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2035 event pairs, 47 based on Foata normal form. 2/524 useless extension candidates. Maximal degree in co-relation 3057. Up to 453 conditions per place. [2024-06-21 21:23:30,340 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-21 21:23:30,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 119 transitions, 1213 flow [2024-06-21 21:23:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:23:30,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:23:30,349 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 845 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:23:30,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 119 transitions, 1213 flow [2024-06-21 21:23:30,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 1166 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:30,365 INFO L231 Difference]: Finished difference. Result has 118 places, 101 transitions, 869 flow [2024-06-21 21:23:30,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=869, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2024-06-21 21:23:30,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 21:23:30,365 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 869 flow [2024-06-21 21:23:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:30,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:30,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:23:30,366 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:30,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2132794058, now seen corresponding path program 2 times [2024-06-21 21:23:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:30,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901680853] [2024-06-21 21:23:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901680853] [2024-06-21 21:23:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901680853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:31,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290527591] [2024-06-21 21:23:31,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:31,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:31,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:31,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:31,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:31,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:31,923 INFO L124 PetriNetUnfolderBase]: 293/519 cut-off events. [2024-06-21 21:23:31,923 INFO L125 PetriNetUnfolderBase]: For 14922/14922 co-relation queries the response was YES. [2024-06-21 21:23:31,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3119 conditions, 519 events. 293/519 cut-off events. For 14922/14922 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1990 event pairs, 47 based on Foata normal form. 1/518 useless extension candidates. Maximal degree in co-relation 3062. Up to 472 conditions per place. [2024-06-21 21:23:31,926 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 97 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-21 21:23:31,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 1147 flow [2024-06-21 21:23:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 21:23:31,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:23:31,928 INFO L175 Difference]: Start difference. First operand has 118 places, 101 transitions, 869 flow. Second operand 9 states and 105 transitions. [2024-06-21 21:23:31,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 1147 flow [2024-06-21 21:23:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 1085 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:31,941 INFO L231 Difference]: Finished difference. Result has 120 places, 101 transitions, 848 flow [2024-06-21 21:23:31,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=848, PETRI_PLACES=120, PETRI_TRANSITIONS=101} [2024-06-21 21:23:31,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-21 21:23:31,942 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 101 transitions, 848 flow [2024-06-21 21:23:31,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:31,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:31,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:31,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:23:31,943 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:31,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2136519080, now seen corresponding path program 1 times [2024-06-21 21:23:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:31,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050503020] [2024-06-21 21:23:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:32,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:32,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050503020] [2024-06-21 21:23:32,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050503020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:32,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:32,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380842254] [2024-06-21 21:23:32,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:32,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:32,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:32,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 848 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:32,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:32,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:32,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:33,090 INFO L124 PetriNetUnfolderBase]: 309/545 cut-off events. [2024-06-21 21:23:33,090 INFO L125 PetriNetUnfolderBase]: For 17402/17402 co-relation queries the response was YES. [2024-06-21 21:23:33,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3280 conditions, 545 events. 309/545 cut-off events. For 17402/17402 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2130 event pairs, 51 based on Foata normal form. 2/545 useless extension candidates. Maximal degree in co-relation 3222. Up to 380 conditions per place. [2024-06-21 21:23:33,093 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 44 changer transitions 0/123 dead transitions. [2024-06-21 21:23:33,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 123 transitions, 1246 flow [2024-06-21 21:23:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 21:23:33,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 21:23:33,094 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 848 flow. Second operand 9 states and 114 transitions. [2024-06-21 21:23:33,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 123 transitions, 1246 flow [2024-06-21 21:23:33,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 123 transitions, 1200 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 21:23:33,110 INFO L231 Difference]: Finished difference. Result has 120 places, 105 transitions, 935 flow [2024-06-21 21:23:33,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=120, PETRI_TRANSITIONS=105} [2024-06-21 21:23:33,110 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-21 21:23:33,111 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 105 transitions, 935 flow [2024-06-21 21:23:33,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:33,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:33,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:23:33,111 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:33,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2136513283, now seen corresponding path program 2 times [2024-06-21 21:23:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:33,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579252598] [2024-06-21 21:23:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579252598] [2024-06-21 21:23:33,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579252598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:33,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:33,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:33,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417388572] [2024-06-21 21:23:33,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:33,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:33,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:33,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 105 transitions, 935 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:33,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:33,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:33,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:34,245 INFO L124 PetriNetUnfolderBase]: 327/574 cut-off events. [2024-06-21 21:23:34,246 INFO L125 PetriNetUnfolderBase]: For 19811/19811 co-relation queries the response was YES. [2024-06-21 21:23:34,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3647 conditions, 574 events. 327/574 cut-off events. For 19811/19811 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2275 event pairs, 48 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 3588. Up to 366 conditions per place. [2024-06-21 21:23:34,249 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 50 changer transitions 0/134 dead transitions. [2024-06-21 21:23:34,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 134 transitions, 1488 flow [2024-06-21 21:23:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 21:23:34,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 21:23:34,250 INFO L175 Difference]: Start difference. First operand has 120 places, 105 transitions, 935 flow. Second operand 9 states and 118 transitions. [2024-06-21 21:23:34,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 134 transitions, 1488 flow [2024-06-21 21:23:34,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 134 transitions, 1435 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:34,269 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 1145 flow [2024-06-21 21:23:34,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1145, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2024-06-21 21:23:34,269 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 21:23:34,269 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 1145 flow [2024-06-21 21:23:34,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:34,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:34,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:34,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:23:34,270 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:34,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2136518863, now seen corresponding path program 3 times [2024-06-21 21:23:34,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:34,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374714626] [2024-06-21 21:23:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:34,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374714626] [2024-06-21 21:23:35,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374714626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:35,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:35,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79499755] [2024-06-21 21:23:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:35,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:35,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 1145 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:35,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:35,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:35,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:35,376 INFO L124 PetriNetUnfolderBase]: 325/571 cut-off events. [2024-06-21 21:23:35,376 INFO L125 PetriNetUnfolderBase]: For 20816/20816 co-relation queries the response was YES. [2024-06-21 21:23:35,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3827 conditions, 571 events. 325/571 cut-off events. For 20816/20816 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2260 event pairs, 48 based on Foata normal form. 1/570 useless extension candidates. Maximal degree in co-relation 3763. Up to 364 conditions per place. [2024-06-21 21:23:35,379 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 80 selfloop transitions, 52 changer transitions 0/134 dead transitions. [2024-06-21 21:23:35,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 134 transitions, 1538 flow [2024-06-21 21:23:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 21:23:35,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 21:23:35,380 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 1145 flow. Second operand 9 states and 116 transitions. [2024-06-21 21:23:35,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 134 transitions, 1538 flow [2024-06-21 21:23:35,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 134 transitions, 1463 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 21:23:35,406 INFO L231 Difference]: Finished difference. Result has 133 places, 117 transitions, 1190 flow [2024-06-21 21:23:35,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1190, PETRI_PLACES=133, PETRI_TRANSITIONS=117} [2024-06-21 21:23:35,407 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-06-21 21:23:35,407 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 117 transitions, 1190 flow [2024-06-21 21:23:35,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:35,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:35,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:23:35,407 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:35,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1077308433, now seen corresponding path program 4 times [2024-06-21 21:23:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195626478] [2024-06-21 21:23:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:36,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195626478] [2024-06-21 21:23:36,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195626478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:36,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:36,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:36,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758562320] [2024-06-21 21:23:36,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:36,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:36,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:36,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:36,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 117 transitions, 1190 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:36,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:36,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:36,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:36,496 INFO L124 PetriNetUnfolderBase]: 343/601 cut-off events. [2024-06-21 21:23:36,496 INFO L125 PetriNetUnfolderBase]: For 25135/25135 co-relation queries the response was YES. [2024-06-21 21:23:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4068 conditions, 601 events. 343/601 cut-off events. For 25135/25135 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2438 event pairs, 47 based on Foata normal form. 6/605 useless extension candidates. Maximal degree in co-relation 4003. Up to 491 conditions per place. [2024-06-21 21:23:36,499 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 36 changer transitions 0/138 dead transitions. [2024-06-21 21:23:36,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 138 transitions, 1575 flow [2024-06-21 21:23:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 21:23:36,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 21:23:36,501 INFO L175 Difference]: Start difference. First operand has 133 places, 117 transitions, 1190 flow. Second operand 9 states and 112 transitions. [2024-06-21 21:23:36,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 138 transitions, 1575 flow [2024-06-21 21:23:36,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 138 transitions, 1480 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:36,533 INFO L231 Difference]: Finished difference. Result has 137 places, 122 transitions, 1251 flow [2024-06-21 21:23:36,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1251, PETRI_PLACES=137, PETRI_TRANSITIONS=122} [2024-06-21 21:23:36,533 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-21 21:23:36,533 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 122 transitions, 1251 flow [2024-06-21 21:23:36,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:36,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:36,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:23:36,534 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:36,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:36,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2014355876, now seen corresponding path program 2 times [2024-06-21 21:23:36,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:36,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769287673] [2024-06-21 21:23:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:37,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:37,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769287673] [2024-06-21 21:23:37,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769287673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:37,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:37,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:37,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684792195] [2024-06-21 21:23:37,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:37,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:37,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:37,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:37,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 122 transitions, 1251 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:37,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:37,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:37,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:37,766 INFO L124 PetriNetUnfolderBase]: 349/611 cut-off events. [2024-06-21 21:23:37,766 INFO L125 PetriNetUnfolderBase]: For 24103/24103 co-relation queries the response was YES. [2024-06-21 21:23:37,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4163 conditions, 611 events. 349/611 cut-off events. For 24103/24103 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2482 event pairs, 49 based on Foata normal form. 2/611 useless extension candidates. Maximal degree in co-relation 4097. Up to 517 conditions per place. [2024-06-21 21:23:37,769 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 104 selfloop transitions, 33 changer transitions 0/139 dead transitions. [2024-06-21 21:23:37,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 1581 flow [2024-06-21 21:23:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 21:23:37,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 21:23:37,770 INFO L175 Difference]: Start difference. First operand has 137 places, 122 transitions, 1251 flow. Second operand 9 states and 110 transitions. [2024-06-21 21:23:37,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 1581 flow [2024-06-21 21:23:37,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 139 transitions, 1475 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:37,795 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 1240 flow [2024-06-21 21:23:37,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1240, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2024-06-21 21:23:37,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-21 21:23:37,795 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 1240 flow [2024-06-21 21:23:37,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:37,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:37,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:23:37,796 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:37,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash 535901480, now seen corresponding path program 3 times [2024-06-21 21:23:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:37,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081445002] [2024-06-21 21:23:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:37,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081445002] [2024-06-21 21:23:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081445002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839363613] [2024-06-21 21:23:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:38,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:38,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:38,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:38,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:38,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 1240 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:38,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:38,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:39,052 INFO L124 PetriNetUnfolderBase]: 355/621 cut-off events. [2024-06-21 21:23:39,052 INFO L125 PetriNetUnfolderBase]: For 25303/25303 co-relation queries the response was YES. [2024-06-21 21:23:39,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4206 conditions, 621 events. 355/621 cut-off events. For 25303/25303 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2530 event pairs, 49 based on Foata normal form. 2/621 useless extension candidates. Maximal degree in co-relation 4139. Up to 513 conditions per place. [2024-06-21 21:23:39,056 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 103 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-21 21:23:39,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 1578 flow [2024-06-21 21:23:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 21:23:39,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 21:23:39,061 INFO L175 Difference]: Start difference. First operand has 139 places, 124 transitions, 1240 flow. Second operand 9 states and 112 transitions. [2024-06-21 21:23:39,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 1578 flow [2024-06-21 21:23:39,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 141 transitions, 1503 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:39,094 INFO L231 Difference]: Finished difference. Result has 141 places, 126 transitions, 1270 flow [2024-06-21 21:23:39,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1270, PETRI_PLACES=141, PETRI_TRANSITIONS=126} [2024-06-21 21:23:39,095 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 21:23:39,095 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 126 transitions, 1270 flow [2024-06-21 21:23:39,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:39,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:39,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:39,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:23:39,095 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:39,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash 535901263, now seen corresponding path program 5 times [2024-06-21 21:23:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926862844] [2024-06-21 21:23:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:39,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926862844] [2024-06-21 21:23:39,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926862844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:39,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:39,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:39,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079714771] [2024-06-21 21:23:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:39,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:39,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:39,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 126 transitions, 1270 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:39,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:39,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:39,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:40,143 INFO L124 PetriNetUnfolderBase]: 371/647 cut-off events. [2024-06-21 21:23:40,143 INFO L125 PetriNetUnfolderBase]: For 27933/27933 co-relation queries the response was YES. [2024-06-21 21:23:40,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4477 conditions, 647 events. 371/647 cut-off events. For 27933/27933 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2670 event pairs, 47 based on Foata normal form. 2/647 useless extension candidates. Maximal degree in co-relation 4409. Up to 506 conditions per place. [2024-06-21 21:23:40,148 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 104 selfloop transitions, 44 changer transitions 0/150 dead transitions. [2024-06-21 21:23:40,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 150 transitions, 1781 flow [2024-06-21 21:23:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 21:23:40,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:23:40,150 INFO L175 Difference]: Start difference. First operand has 141 places, 126 transitions, 1270 flow. Second operand 9 states and 117 transitions. [2024-06-21 21:23:40,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 150 transitions, 1781 flow [2024-06-21 21:23:40,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 150 transitions, 1696 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:40,194 INFO L231 Difference]: Finished difference. Result has 143 places, 132 transitions, 1355 flow [2024-06-21 21:23:40,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1355, PETRI_PLACES=143, PETRI_TRANSITIONS=132} [2024-06-21 21:23:40,194 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 21:23:40,195 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 132 transitions, 1355 flow [2024-06-21 21:23:40,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:40,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:40,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:40,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:23:40,195 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:40,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:40,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2014563483, now seen corresponding path program 6 times [2024-06-21 21:23:40,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:40,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049003611] [2024-06-21 21:23:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049003611] [2024-06-21 21:23:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049003611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:40,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:40,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512519907] [2024-06-21 21:23:40,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:40,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:41,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:41,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 132 transitions, 1355 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:41,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:41,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:41,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:41,348 INFO L124 PetriNetUnfolderBase]: 369/644 cut-off events. [2024-06-21 21:23:41,348 INFO L125 PetriNetUnfolderBase]: For 27988/27988 co-relation queries the response was YES. [2024-06-21 21:23:41,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 644 events. 369/644 cut-off events. For 27988/27988 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2643 event pairs, 47 based on Foata normal form. 1/643 useless extension candidates. Maximal degree in co-relation 4417. Up to 528 conditions per place. [2024-06-21 21:23:41,352 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 39 changer transitions 0/150 dead transitions. [2024-06-21 21:23:41,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 150 transitions, 1719 flow [2024-06-21 21:23:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:41,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 21:23:41,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 21:23:41,353 INFO L175 Difference]: Start difference. First operand has 143 places, 132 transitions, 1355 flow. Second operand 9 states and 114 transitions. [2024-06-21 21:23:41,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 150 transitions, 1719 flow [2024-06-21 21:23:41,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 150 transitions, 1644 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:41,394 INFO L231 Difference]: Finished difference. Result has 148 places, 135 transitions, 1407 flow [2024-06-21 21:23:41,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1407, PETRI_PLACES=148, PETRI_TRANSITIONS=135} [2024-06-21 21:23:41,395 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-21 21:23:41,395 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 135 transitions, 1407 flow [2024-06-21 21:23:41,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:41,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:41,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:41,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:23:41,395 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:41,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:41,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1807208118, now seen corresponding path program 4 times [2024-06-21 21:23:41,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:41,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533237790] [2024-06-21 21:23:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:41,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533237790] [2024-06-21 21:23:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533237790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:42,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36361494] [2024-06-21 21:23:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:42,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:42,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 135 transitions, 1407 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:42,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:42,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:42,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:42,428 INFO L124 PetriNetUnfolderBase]: 365/638 cut-off events. [2024-06-21 21:23:42,428 INFO L125 PetriNetUnfolderBase]: For 28532/28532 co-relation queries the response was YES. [2024-06-21 21:23:42,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4495 conditions, 638 events. 365/638 cut-off events. For 28532/28532 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2623 event pairs, 54 based on Foata normal form. 2/638 useless extension candidates. Maximal degree in co-relation 4423. Up to 601 conditions per place. [2024-06-21 21:23:42,432 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 131 selfloop transitions, 15 changer transitions 0/148 dead transitions. [2024-06-21 21:23:42,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 148 transitions, 1747 flow [2024-06-21 21:23:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-21 21:23:42,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:23:42,434 INFO L175 Difference]: Start difference. First operand has 148 places, 135 transitions, 1407 flow. Second operand 9 states and 99 transitions. [2024-06-21 21:23:42,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 148 transitions, 1747 flow [2024-06-21 21:23:42,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 148 transitions, 1681 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:42,478 INFO L231 Difference]: Finished difference. Result has 152 places, 137 transitions, 1404 flow [2024-06-21 21:23:42,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1404, PETRI_PLACES=152, PETRI_TRANSITIONS=137} [2024-06-21 21:23:42,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-21 21:23:42,479 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 137 transitions, 1404 flow [2024-06-21 21:23:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:42,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:42,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:23:42,479 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:42,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:42,479 INFO L85 PathProgramCache]: Analyzing trace with hash -732395142, now seen corresponding path program 5 times [2024-06-21 21:23:42,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:42,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655758960] [2024-06-21 21:23:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:43,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:43,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655758960] [2024-06-21 21:23:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655758960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:43,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:43,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:43,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153909954] [2024-06-21 21:23:43,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:43,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:43,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:43,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:43,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 137 transitions, 1404 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:43,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:43,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:43,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:43,670 INFO L124 PetriNetUnfolderBase]: 371/648 cut-off events. [2024-06-21 21:23:43,670 INFO L125 PetriNetUnfolderBase]: For 29766/29766 co-relation queries the response was YES. [2024-06-21 21:23:43,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4565 conditions, 648 events. 371/648 cut-off events. For 29766/29766 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2665 event pairs, 54 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 4491. Up to 607 conditions per place. [2024-06-21 21:23:43,674 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 132 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2024-06-21 21:23:43,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 151 transitions, 1758 flow [2024-06-21 21:23:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 21:23:43,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 21:23:43,677 INFO L175 Difference]: Start difference. First operand has 152 places, 137 transitions, 1404 flow. Second operand 9 states and 101 transitions. [2024-06-21 21:23:43,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 151 transitions, 1758 flow [2024-06-21 21:23:43,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 1709 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:43,720 INFO L231 Difference]: Finished difference. Result has 154 places, 139 transitions, 1426 flow [2024-06-21 21:23:43,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1426, PETRI_PLACES=154, PETRI_TRANSITIONS=139} [2024-06-21 21:23:43,721 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-21 21:23:43,721 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 139 transitions, 1426 flow [2024-06-21 21:23:43,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:43,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:43,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:43,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:23:43,723 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:43,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash -732395359, now seen corresponding path program 7 times [2024-06-21 21:23:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:43,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034282160] [2024-06-21 21:23:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:43,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:44,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034282160] [2024-06-21 21:23:44,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034282160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:44,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:44,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:44,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624760480] [2024-06-21 21:23:44,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:44,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:44,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:44,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 139 transitions, 1426 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:44,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:44,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:44,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:44,705 INFO L124 PetriNetUnfolderBase]: 389/678 cut-off events. [2024-06-21 21:23:44,705 INFO L125 PetriNetUnfolderBase]: For 34550/34550 co-relation queries the response was YES. [2024-06-21 21:23:44,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 678 events. 389/678 cut-off events. For 34550/34550 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2836 event pairs, 56 based on Foata normal form. 6/682 useless extension candidates. Maximal degree in co-relation 4708. Up to 621 conditions per place. [2024-06-21 21:23:44,709 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 135 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2024-06-21 21:23:44,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 157 transitions, 1855 flow [2024-06-21 21:23:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 21:23:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-21 21:23:44,709 INFO L175 Difference]: Start difference. First operand has 154 places, 139 transitions, 1426 flow. Second operand 9 states and 103 transitions. [2024-06-21 21:23:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 157 transitions, 1855 flow [2024-06-21 21:23:44,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 157 transitions, 1804 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:44,760 INFO L231 Difference]: Finished difference. Result has 156 places, 144 transitions, 1511 flow [2024-06-21 21:23:44,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1511, PETRI_PLACES=156, PETRI_TRANSITIONS=144} [2024-06-21 21:23:44,760 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-21 21:23:44,760 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 144 transitions, 1511 flow [2024-06-21 21:23:44,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:44,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:44,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:44,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:23:44,761 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:44,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash -988895652, now seen corresponding path program 6 times [2024-06-21 21:23:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:44,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954398302] [2024-06-21 21:23:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:44,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:45,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954398302] [2024-06-21 21:23:45,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954398302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:45,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:45,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:45,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418161470] [2024-06-21 21:23:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:45,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:45,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:45,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:45,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 144 transitions, 1511 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:45,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:45,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:45,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:45,879 INFO L124 PetriNetUnfolderBase]: 395/688 cut-off events. [2024-06-21 21:23:45,879 INFO L125 PetriNetUnfolderBase]: For 32936/32936 co-relation queries the response was YES. [2024-06-21 21:23:45,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4914 conditions, 688 events. 395/688 cut-off events. For 32936/32936 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2898 event pairs, 56 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 4838. Up to 635 conditions per place. [2024-06-21 21:23:45,883 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 137 selfloop transitions, 21 changer transitions 0/160 dead transitions. [2024-06-21 21:23:45,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 160 transitions, 1893 flow [2024-06-21 21:23:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 21:23:45,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:23:45,884 INFO L175 Difference]: Start difference. First operand has 156 places, 144 transitions, 1511 flow. Second operand 9 states and 105 transitions. [2024-06-21 21:23:45,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 160 transitions, 1893 flow [2024-06-21 21:23:45,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 160 transitions, 1801 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:45,939 INFO L231 Difference]: Finished difference. Result has 158 places, 146 transitions, 1502 flow [2024-06-21 21:23:45,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1502, PETRI_PLACES=158, PETRI_TRANSITIONS=146} [2024-06-21 21:23:45,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-21 21:23:45,939 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 146 transitions, 1502 flow [2024-06-21 21:23:45,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:45,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:45,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:45,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:23:45,940 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:45,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 622045089, now seen corresponding path program 8 times [2024-06-21 21:23:45,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:45,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242226981] [2024-06-21 21:23:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:45,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:46,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242226981] [2024-06-21 21:23:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242226981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:46,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:46,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:46,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662944541] [2024-06-21 21:23:46,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:46,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:46,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:46,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:46,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 146 transitions, 1502 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:46,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:46,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:46,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:46,996 INFO L124 PetriNetUnfolderBase]: 403/702 cut-off events. [2024-06-21 21:23:46,996 INFO L125 PetriNetUnfolderBase]: For 36000/36000 co-relation queries the response was YES. [2024-06-21 21:23:46,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4909 conditions, 702 events. 403/702 cut-off events. For 36000/36000 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2971 event pairs, 55 based on Foata normal form. 6/706 useless extension candidates. Maximal degree in co-relation 4832. Up to 633 conditions per place. [2024-06-21 21:23:47,000 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 139 selfloop transitions, 24 changer transitions 0/165 dead transitions. [2024-06-21 21:23:47,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 165 transitions, 1944 flow [2024-06-21 21:23:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 21:23:47,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-21 21:23:47,003 INFO L175 Difference]: Start difference. First operand has 158 places, 146 transitions, 1502 flow. Second operand 9 states and 107 transitions. [2024-06-21 21:23:47,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 165 transitions, 1944 flow [2024-06-21 21:23:47,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 165 transitions, 1881 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:47,061 INFO L231 Difference]: Finished difference. Result has 160 places, 150 transitions, 1572 flow [2024-06-21 21:23:47,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1572, PETRI_PLACES=160, PETRI_TRANSITIONS=150} [2024-06-21 21:23:47,062 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 21:23:47,062 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 150 transitions, 1572 flow [2024-06-21 21:23:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:47,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:47,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:47,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:23:47,062 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:47,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash -989103259, now seen corresponding path program 9 times [2024-06-21 21:23:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:47,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505735487] [2024-06-21 21:23:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:47,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:47,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:47,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505735487] [2024-06-21 21:23:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505735487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:47,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:47,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:47,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777387626] [2024-06-21 21:23:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:47,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:47,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:47,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:47,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 150 transitions, 1572 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:47,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:47,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:47,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:48,094 INFO L124 PetriNetUnfolderBase]: 415/722 cut-off events. [2024-06-21 21:23:48,094 INFO L125 PetriNetUnfolderBase]: For 34867/34867 co-relation queries the response was YES. [2024-06-21 21:23:48,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5174 conditions, 722 events. 415/722 cut-off events. For 34867/34867 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3077 event pairs, 52 based on Foata normal form. 2/722 useless extension candidates. Maximal degree in co-relation 5096. Up to 589 conditions per place. [2024-06-21 21:23:48,098 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 124 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-06-21 21:23:48,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 169 transitions, 2126 flow [2024-06-21 21:23:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:23:48,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:23:48,099 INFO L175 Difference]: Start difference. First operand has 160 places, 150 transitions, 1572 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:23:48,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 169 transitions, 2126 flow [2024-06-21 21:23:48,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 169 transitions, 2016 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:48,163 INFO L231 Difference]: Finished difference. Result has 162 places, 155 transitions, 1646 flow [2024-06-21 21:23:48,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1646, PETRI_PLACES=162, PETRI_TRANSITIONS=155} [2024-06-21 21:23:48,163 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2024-06-21 21:23:48,163 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 155 transitions, 1646 flow [2024-06-21 21:23:48,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:48,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:48,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:23:48,163 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:48,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash -989103414, now seen corresponding path program 3 times [2024-06-21 21:23:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:48,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549001205] [2024-06-21 21:23:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:49,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549001205] [2024-06-21 21:23:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549001205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:49,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:49,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841873071] [2024-06-21 21:23:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:49,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:49,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:49,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 155 transitions, 1646 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:49,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:49,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:49,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:49,400 INFO L124 PetriNetUnfolderBase]: 412/717 cut-off events. [2024-06-21 21:23:49,400 INFO L125 PetriNetUnfolderBase]: For 34230/34230 co-relation queries the response was YES. [2024-06-21 21:23:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5118 conditions, 717 events. 412/717 cut-off events. For 34230/34230 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3050 event pairs, 64 based on Foata normal form. 1/716 useless extension candidates. Maximal degree in co-relation 5039. Up to 693 conditions per place. [2024-06-21 21:23:49,404 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 146 selfloop transitions, 15 changer transitions 0/163 dead transitions. [2024-06-21 21:23:49,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 163 transitions, 1986 flow [2024-06-21 21:23:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 21:23:49,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:23:49,405 INFO L175 Difference]: Start difference. First operand has 162 places, 155 transitions, 1646 flow. Second operand 9 states and 96 transitions. [2024-06-21 21:23:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 163 transitions, 1986 flow [2024-06-21 21:23:49,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 1893 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 21:23:49,479 INFO L231 Difference]: Finished difference. Result has 166 places, 155 transitions, 1588 flow [2024-06-21 21:23:49,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1588, PETRI_PLACES=166, PETRI_TRANSITIONS=155} [2024-06-21 21:23:49,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-21 21:23:49,479 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 155 transitions, 1588 flow [2024-06-21 21:23:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:49,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:49,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:23:49,480 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:49,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash -989097679, now seen corresponding path program 10 times [2024-06-21 21:23:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:49,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367976610] [2024-06-21 21:23:49,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:49,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:50,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367976610] [2024-06-21 21:23:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367976610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:50,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:50,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:50,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259773104] [2024-06-21 21:23:50,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:50,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:50,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:50,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:50,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 155 transitions, 1588 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:50,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:50,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:50,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:50,541 INFO L124 PetriNetUnfolderBase]: 408/711 cut-off events. [2024-06-21 21:23:50,541 INFO L125 PetriNetUnfolderBase]: For 34143/34143 co-relation queries the response was YES. [2024-06-21 21:23:50,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4962 conditions, 711 events. 408/711 cut-off events. For 34143/34143 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3032 event pairs, 51 based on Foata normal form. 2/711 useless extension candidates. Maximal degree in co-relation 4881. Up to 583 conditions per place. [2024-06-21 21:23:50,545 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 125 selfloop transitions, 41 changer transitions 0/168 dead transitions. [2024-06-21 21:23:50,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 168 transitions, 1972 flow [2024-06-21 21:23:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 21:23:50,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:23:50,546 INFO L175 Difference]: Start difference. First operand has 166 places, 155 transitions, 1588 flow. Second operand 9 states and 108 transitions. [2024-06-21 21:23:50,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 168 transitions, 1972 flow [2024-06-21 21:23:50,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 168 transitions, 1895 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:23:50,630 INFO L231 Difference]: Finished difference. Result has 167 places, 155 transitions, 1603 flow [2024-06-21 21:23:50,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=167, PETRI_TRANSITIONS=155} [2024-06-21 21:23:50,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-21 21:23:50,630 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 155 transitions, 1603 flow [2024-06-21 21:23:50,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:50,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:50,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:50,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:23:50,631 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:50,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash -989097462, now seen corresponding path program 7 times [2024-06-21 21:23:50,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:50,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340127329] [2024-06-21 21:23:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:50,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:51,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:51,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340127329] [2024-06-21 21:23:51,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340127329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:51,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:51,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:23:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402914534] [2024-06-21 21:23:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:23:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:23:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:23:51,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:51,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 155 transitions, 1603 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:51,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:51,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:51,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:51,782 INFO L124 PetriNetUnfolderBase]: 404/705 cut-off events. [2024-06-21 21:23:51,783 INFO L125 PetriNetUnfolderBase]: For 33337/33337 co-relation queries the response was YES. [2024-06-21 21:23:51,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4876 conditions, 705 events. 404/705 cut-off events. For 33337/33337 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2997 event pairs, 54 based on Foata normal form. 2/705 useless extension candidates. Maximal degree in co-relation 4794. Up to 623 conditions per place. [2024-06-21 21:23:51,788 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 136 selfloop transitions, 29 changer transitions 0/167 dead transitions. [2024-06-21 21:23:51,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 167 transitions, 1961 flow [2024-06-21 21:23:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:23:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:23:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 21:23:51,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 21:23:51,789 INFO L175 Difference]: Start difference. First operand has 167 places, 155 transitions, 1603 flow. Second operand 9 states and 104 transitions. [2024-06-21 21:23:51,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 167 transitions, 1961 flow [2024-06-21 21:23:51,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 167 transitions, 1843 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:23:51,862 INFO L231 Difference]: Finished difference. Result has 168 places, 155 transitions, 1548 flow [2024-06-21 21:23:51,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1548, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2024-06-21 21:23:51,862 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-21 21:23:51,862 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 1548 flow [2024-06-21 21:23:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:23:51,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:51,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:23:51,863 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:51,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:51,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1689250213, now seen corresponding path program 1 times [2024-06-21 21:23:51,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:51,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493360485] [2024-06-21 21:23:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:51,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:52,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493360485] [2024-06-21 21:23:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493360485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:52,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:52,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138396575] [2024-06-21 21:23:52,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:52,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:52,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:53,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:53,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 1548 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:53,462 INFO L124 PetriNetUnfolderBase]: 415/726 cut-off events. [2024-06-21 21:23:53,462 INFO L125 PetriNetUnfolderBase]: For 37031/37031 co-relation queries the response was YES. [2024-06-21 21:23:53,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 726 events. 415/726 cut-off events. For 37031/37031 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3132 event pairs, 40 based on Foata normal form. 2/726 useless extension candidates. Maximal degree in co-relation 4974. Up to 630 conditions per place. [2024-06-21 21:23:53,467 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 155 selfloop transitions, 24 changer transitions 0/181 dead transitions. [2024-06-21 21:23:53,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 181 transitions, 2102 flow [2024-06-21 21:23:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:23:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:23:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 21:23:53,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 21:23:53,468 INFO L175 Difference]: Start difference. First operand has 168 places, 155 transitions, 1548 flow. Second operand 11 states and 128 transitions. [2024-06-21 21:23:53,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 181 transitions, 2102 flow [2024-06-21 21:23:53,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 181 transitions, 1965 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 21:23:53,538 INFO L231 Difference]: Finished difference. Result has 170 places, 157 transitions, 1493 flow [2024-06-21 21:23:53,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1493, PETRI_PLACES=170, PETRI_TRANSITIONS=157} [2024-06-21 21:23:53,538 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-21 21:23:53,538 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 157 transitions, 1493 flow [2024-06-21 21:23:53,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:53,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:53,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:53,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:23:53,539 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:53,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:53,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1689310663, now seen corresponding path program 2 times [2024-06-21 21:23:53,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:53,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900821411] [2024-06-21 21:23:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:54,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900821411] [2024-06-21 21:23:54,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900821411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:54,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:54,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:54,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766667221] [2024-06-21 21:23:54,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:54,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:54,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:54,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:54,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:54,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:54,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 157 transitions, 1493 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:54,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:54,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:54,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:55,081 INFO L124 PetriNetUnfolderBase]: 419/734 cut-off events. [2024-06-21 21:23:55,081 INFO L125 PetriNetUnfolderBase]: For 38317/38317 co-relation queries the response was YES. [2024-06-21 21:23:55,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4997 conditions, 734 events. 419/734 cut-off events. For 38317/38317 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3179 event pairs, 57 based on Foata normal form. 2/734 useless extension candidates. Maximal degree in co-relation 4914. Up to 669 conditions per place. [2024-06-21 21:23:55,086 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 155 selfloop transitions, 23 changer transitions 0/180 dead transitions. [2024-06-21 21:23:55,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 180 transitions, 1931 flow [2024-06-21 21:23:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:23:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:23:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 21:23:55,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 21:23:55,087 INFO L175 Difference]: Start difference. First operand has 170 places, 157 transitions, 1493 flow. Second operand 11 states and 127 transitions. [2024-06-21 21:23:55,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 180 transitions, 1931 flow [2024-06-21 21:23:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 180 transitions, 1876 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:23:55,169 INFO L231 Difference]: Finished difference. Result has 174 places, 158 transitions, 1506 flow [2024-06-21 21:23:55,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1506, PETRI_PLACES=174, PETRI_TRANSITIONS=158} [2024-06-21 21:23:55,169 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 21:23:55,170 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 158 transitions, 1506 flow [2024-06-21 21:23:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:55,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:55,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:55,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:23:55,170 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:55,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:55,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1250535369, now seen corresponding path program 1 times [2024-06-21 21:23:55,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:55,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815700751] [2024-06-21 21:23:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:56,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:56,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815700751] [2024-06-21 21:23:56,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815700751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:56,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:56,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:56,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628365220] [2024-06-21 21:23:56,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:56,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:56,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 158 transitions, 1506 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:56,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:56,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:56,548 INFO L124 PetriNetUnfolderBase]: 441/770 cut-off events. [2024-06-21 21:23:56,548 INFO L125 PetriNetUnfolderBase]: For 45166/45166 co-relation queries the response was YES. [2024-06-21 21:23:56,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5359 conditions, 770 events. 441/770 cut-off events. For 45166/45166 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3380 event pairs, 61 based on Foata normal form. 4/772 useless extension candidates. Maximal degree in co-relation 5274. Up to 678 conditions per place. [2024-06-21 21:23:56,552 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 28 changer transitions 0/183 dead transitions. [2024-06-21 21:23:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 183 transitions, 2120 flow [2024-06-21 21:23:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 21:23:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 21:23:56,553 INFO L175 Difference]: Start difference. First operand has 174 places, 158 transitions, 1506 flow. Second operand 10 states and 122 transitions. [2024-06-21 21:23:56,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 183 transitions, 2120 flow [2024-06-21 21:23:56,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 183 transitions, 2070 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:23:56,655 INFO L231 Difference]: Finished difference. Result has 175 places, 163 transitions, 1619 flow [2024-06-21 21:23:56,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1619, PETRI_PLACES=175, PETRI_TRANSITIONS=163} [2024-06-21 21:23:56,656 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-21 21:23:56,656 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 1619 flow [2024-06-21 21:23:56,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:56,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:56,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:23:56,656 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:56,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1692107173, now seen corresponding path program 3 times [2024-06-21 21:23:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769711213] [2024-06-21 21:23:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:57,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769711213] [2024-06-21 21:23:57,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769711213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:57,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:57,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945620151] [2024-06-21 21:23:57,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:57,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:57,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:57,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:57,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:57,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 163 transitions, 1619 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:57,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:57,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:57,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:58,329 INFO L124 PetriNetUnfolderBase]: 438/765 cut-off events. [2024-06-21 21:23:58,329 INFO L125 PetriNetUnfolderBase]: For 41464/41464 co-relation queries the response was YES. [2024-06-21 21:23:58,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 765 events. 438/765 cut-off events. For 41464/41464 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3335 event pairs, 63 based on Foata normal form. 2/765 useless extension candidates. Maximal degree in co-relation 5237. Up to 712 conditions per place. [2024-06-21 21:23:58,333 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 160 selfloop transitions, 19 changer transitions 0/181 dead transitions. [2024-06-21 21:23:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 181 transitions, 2029 flow [2024-06-21 21:23:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 21:23:58,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 21:23:58,334 INFO L175 Difference]: Start difference. First operand has 175 places, 163 transitions, 1619 flow. Second operand 10 states and 114 transitions. [2024-06-21 21:23:58,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 181 transitions, 2029 flow [2024-06-21 21:23:58,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 181 transitions, 1934 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 21:23:58,427 INFO L231 Difference]: Finished difference. Result has 179 places, 163 transitions, 1566 flow [2024-06-21 21:23:58,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1566, PETRI_PLACES=179, PETRI_TRANSITIONS=163} [2024-06-21 21:23:58,428 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 21:23:58,428 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 163 transitions, 1566 flow [2024-06-21 21:23:58,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:58,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:58,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:58,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:23:58,428 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:58,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1807582793, now seen corresponding path program 2 times [2024-06-21 21:23:58,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:58,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353649830] [2024-06-21 21:23:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:23:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:23:59,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:23:59,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353649830] [2024-06-21 21:23:59,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353649830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:23:59,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:23:59,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:23:59,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116102410] [2024-06-21 21:23:59,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:23:59,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:23:59,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:23:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:23:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:23:59,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:23:59,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 163 transitions, 1566 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:59,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:23:59,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:23:59,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:23:59,779 INFO L124 PetriNetUnfolderBase]: 494/855 cut-off events. [2024-06-21 21:23:59,779 INFO L125 PetriNetUnfolderBase]: For 58466/58466 co-relation queries the response was YES. [2024-06-21 21:23:59,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6402 conditions, 855 events. 494/855 cut-off events. For 58466/58466 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3827 event pairs, 51 based on Foata normal form. 2/855 useless extension candidates. Maximal degree in co-relation 6314. Up to 375 conditions per place. [2024-06-21 21:23:59,785 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 111 selfloop transitions, 83 changer transitions 0/196 dead transitions. [2024-06-21 21:23:59,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 196 transitions, 2546 flow [2024-06-21 21:23:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:23:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:23:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 21:23:59,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2024-06-21 21:23:59,786 INFO L175 Difference]: Start difference. First operand has 179 places, 163 transitions, 1566 flow. Second operand 10 states and 136 transitions. [2024-06-21 21:23:59,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 196 transitions, 2546 flow [2024-06-21 21:23:59,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 196 transitions, 2502 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:23:59,903 INFO L231 Difference]: Finished difference. Result has 182 places, 173 transitions, 1945 flow [2024-06-21 21:23:59,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1945, PETRI_PLACES=182, PETRI_TRANSITIONS=173} [2024-06-21 21:23:59,904 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-21 21:23:59,904 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 173 transitions, 1945 flow [2024-06-21 21:23:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:23:59,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:23:59,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:23:59,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:23:59,904 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:23:59,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:23:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1807576097, now seen corresponding path program 1 times [2024-06-21 21:23:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:23:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949296502] [2024-06-21 21:23:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:23:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:23:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:01,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:01,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949296502] [2024-06-21 21:24:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949296502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:01,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:01,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83267271] [2024-06-21 21:24:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:01,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:01,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 173 transitions, 1945 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:01,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:01,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:01,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:01,576 INFO L124 PetriNetUnfolderBase]: 497/860 cut-off events. [2024-06-21 21:24:01,576 INFO L125 PetriNetUnfolderBase]: For 60261/60261 co-relation queries the response was YES. [2024-06-21 21:24:01,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6820 conditions, 860 events. 497/860 cut-off events. For 60261/60261 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3884 event pairs, 63 based on Foata normal form. 1/859 useless extension candidates. Maximal degree in co-relation 6729. Up to 640 conditions per place. [2024-06-21 21:24:01,582 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 125 selfloop transitions, 64 changer transitions 0/191 dead transitions. [2024-06-21 21:24:01,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 191 transitions, 2412 flow [2024-06-21 21:24:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:24:01,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:24:01,583 INFO L175 Difference]: Start difference. First operand has 182 places, 173 transitions, 1945 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:24:01,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 191 transitions, 2412 flow [2024-06-21 21:24:01,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 191 transitions, 2285 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 21:24:01,706 INFO L231 Difference]: Finished difference. Result has 188 places, 175 transitions, 2002 flow [2024-06-21 21:24:01,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2002, PETRI_PLACES=188, PETRI_TRANSITIONS=175} [2024-06-21 21:24:01,706 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 21:24:01,706 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 175 transitions, 2002 flow [2024-06-21 21:24:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:01,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:01,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:01,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:24:01,707 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:01,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1961193435, now seen corresponding path program 2 times [2024-06-21 21:24:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:01,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352974022] [2024-06-21 21:24:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:02,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:02,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352974022] [2024-06-21 21:24:02,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352974022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:02,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:02,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130795328] [2024-06-21 21:24:02,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:02,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:02,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:02,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:02,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 175 transitions, 2002 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:02,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:02,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:02,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:03,262 INFO L124 PetriNetUnfolderBase]: 495/857 cut-off events. [2024-06-21 21:24:03,262 INFO L125 PetriNetUnfolderBase]: For 59708/59708 co-relation queries the response was YES. [2024-06-21 21:24:03,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6759 conditions, 857 events. 495/857 cut-off events. For 59708/59708 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3867 event pairs, 62 based on Foata normal form. 1/856 useless extension candidates. Maximal degree in co-relation 6666. Up to 551 conditions per place. [2024-06-21 21:24:03,268 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 82 changer transitions 0/192 dead transitions. [2024-06-21 21:24:03,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 192 transitions, 2553 flow [2024-06-21 21:24:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 21:24:03,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-21 21:24:03,269 INFO L175 Difference]: Start difference. First operand has 188 places, 175 transitions, 2002 flow. Second operand 9 states and 121 transitions. [2024-06-21 21:24:03,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 192 transitions, 2553 flow [2024-06-21 21:24:03,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 192 transitions, 2404 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:03,420 INFO L231 Difference]: Finished difference. Result has 189 places, 176 transitions, 2045 flow [2024-06-21 21:24:03,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2045, PETRI_PLACES=189, PETRI_TRANSITIONS=176} [2024-06-21 21:24:03,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-21 21:24:03,421 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 176 transitions, 2045 flow [2024-06-21 21:24:03,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:03,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:03,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:03,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:24:03,422 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:03,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:03,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1807403303, now seen corresponding path program 3 times [2024-06-21 21:24:03,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:03,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109483536] [2024-06-21 21:24:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:03,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109483536] [2024-06-21 21:24:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109483536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:04,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878621705] [2024-06-21 21:24:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:04,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:04,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:04,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 176 transitions, 2045 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:04,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:04,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:04,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:04,942 INFO L124 PetriNetUnfolderBase]: 517/893 cut-off events. [2024-06-21 21:24:04,943 INFO L125 PetriNetUnfolderBase]: For 69774/69774 co-relation queries the response was YES. [2024-06-21 21:24:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7192 conditions, 893 events. 517/893 cut-off events. For 69774/69774 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4054 event pairs, 60 based on Foata normal form. 4/895 useless extension candidates. Maximal degree in co-relation 7098. Up to 393 conditions per place. [2024-06-21 21:24:04,949 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 123 selfloop transitions, 81 changer transitions 0/206 dead transitions. [2024-06-21 21:24:04,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 206 transitions, 3073 flow [2024-06-21 21:24:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:04,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 21:24:04,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2024-06-21 21:24:04,950 INFO L175 Difference]: Start difference. First operand has 189 places, 176 transitions, 2045 flow. Second operand 10 states and 141 transitions. [2024-06-21 21:24:04,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 206 transitions, 3073 flow [2024-06-21 21:24:05,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 206 transitions, 2875 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:05,118 INFO L231 Difference]: Finished difference. Result has 191 places, 181 transitions, 2124 flow [2024-06-21 21:24:05,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2124, PETRI_PLACES=191, PETRI_TRANSITIONS=181} [2024-06-21 21:24:05,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-21 21:24:05,119 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 181 transitions, 2124 flow [2024-06-21 21:24:05,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:05,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:05,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:05,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:24:05,119 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:05,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1807398343, now seen corresponding path program 4 times [2024-06-21 21:24:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:05,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110476272] [2024-06-21 21:24:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:05,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:06,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:06,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110476272] [2024-06-21 21:24:06,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110476272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:06,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:06,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:06,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667546391] [2024-06-21 21:24:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:06,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:06,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:06,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:06,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:06,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 181 transitions, 2124 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:06,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:06,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:06,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:06,595 INFO L124 PetriNetUnfolderBase]: 521/901 cut-off events. [2024-06-21 21:24:06,595 INFO L125 PetriNetUnfolderBase]: For 67119/67119 co-relation queries the response was YES. [2024-06-21 21:24:06,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 901 events. 521/901 cut-off events. For 67119/67119 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4105 event pairs, 81 based on Foata normal form. 2/901 useless extension candidates. Maximal degree in co-relation 7174. Up to 816 conditions per place. [2024-06-21 21:24:06,602 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 163 selfloop transitions, 33 changer transitions 0/198 dead transitions. [2024-06-21 21:24:06,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 198 transitions, 2580 flow [2024-06-21 21:24:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:24:06,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:24:06,603 INFO L175 Difference]: Start difference. First operand has 191 places, 181 transitions, 2124 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:24:06,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 198 transitions, 2580 flow [2024-06-21 21:24:06,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 198 transitions, 2387 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:06,749 INFO L231 Difference]: Finished difference. Result has 196 places, 183 transitions, 2044 flow [2024-06-21 21:24:06,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2044, PETRI_PLACES=196, PETRI_TRANSITIONS=183} [2024-06-21 21:24:06,750 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 21:24:06,750 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 183 transitions, 2044 flow [2024-06-21 21:24:06,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:06,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:06,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:06,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:24:06,750 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:06,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1807576283, now seen corresponding path program 4 times [2024-06-21 21:24:06,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:06,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480085299] [2024-06-21 21:24:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480085299] [2024-06-21 21:24:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480085299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:07,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765960788] [2024-06-21 21:24:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:07,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:07,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 183 transitions, 2044 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:07,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:07,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:07,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:08,216 INFO L124 PetriNetUnfolderBase]: 513/889 cut-off events. [2024-06-21 21:24:08,217 INFO L125 PetriNetUnfolderBase]: For 65100/65100 co-relation queries the response was YES. [2024-06-21 21:24:08,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6792 conditions, 889 events. 513/889 cut-off events. For 65100/65100 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4049 event pairs, 60 based on Foata normal form. 4/891 useless extension candidates. Maximal degree in co-relation 6696. Up to 397 conditions per place. [2024-06-21 21:24:08,223 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 120 selfloop transitions, 84 changer transitions 0/206 dead transitions. [2024-06-21 21:24:08,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 206 transitions, 2864 flow [2024-06-21 21:24:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 21:24:08,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 21:24:08,224 INFO L175 Difference]: Start difference. First operand has 196 places, 183 transitions, 2044 flow. Second operand 10 states and 137 transitions. [2024-06-21 21:24:08,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 206 transitions, 2864 flow [2024-06-21 21:24:08,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 206 transitions, 2752 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:08,363 INFO L231 Difference]: Finished difference. Result has 197 places, 183 transitions, 2107 flow [2024-06-21 21:24:08,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2107, PETRI_PLACES=197, PETRI_TRANSITIONS=183} [2024-06-21 21:24:08,363 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 21:24:08,363 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 183 transitions, 2107 flow [2024-06-21 21:24:08,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:08,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:08,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:08,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:24:08,364 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:08,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash -969605065, now seen corresponding path program 5 times [2024-06-21 21:24:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893069001] [2024-06-21 21:24:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:08,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:09,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893069001] [2024-06-21 21:24:09,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893069001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:09,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:09,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:09,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309210645] [2024-06-21 21:24:09,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:09,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:09,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:09,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 183 transitions, 2107 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:09,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:09,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:09,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:09,677 INFO L124 PetriNetUnfolderBase]: 529/915 cut-off events. [2024-06-21 21:24:09,677 INFO L125 PetriNetUnfolderBase]: For 68834/68834 co-relation queries the response was YES. [2024-06-21 21:24:09,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7216 conditions, 915 events. 529/915 cut-off events. For 68834/68834 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4231 event pairs, 66 based on Foata normal form. 2/915 useless extension candidates. Maximal degree in co-relation 7120. Up to 762 conditions per place. [2024-06-21 21:24:09,683 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 159 selfloop transitions, 44 changer transitions 0/205 dead transitions. [2024-06-21 21:24:09,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 205 transitions, 2759 flow [2024-06-21 21:24:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 21:24:09,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 21:24:09,684 INFO L175 Difference]: Start difference. First operand has 197 places, 183 transitions, 2107 flow. Second operand 10 states and 125 transitions. [2024-06-21 21:24:09,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 205 transitions, 2759 flow [2024-06-21 21:24:09,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 205 transitions, 2567 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:09,806 INFO L231 Difference]: Finished difference. Result has 198 places, 187 transitions, 2100 flow [2024-06-21 21:24:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2100, PETRI_PLACES=198, PETRI_TRANSITIONS=187} [2024-06-21 21:24:09,806 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-21 21:24:09,806 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 187 transitions, 2100 flow [2024-06-21 21:24:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:09,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:09,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:24:09,807 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:09,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:09,807 INFO L85 PathProgramCache]: Analyzing trace with hash -969605251, now seen corresponding path program 3 times [2024-06-21 21:24:09,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:09,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330406478] [2024-06-21 21:24:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:09,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:10,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:10,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330406478] [2024-06-21 21:24:10,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330406478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:10,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:10,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:10,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091701600] [2024-06-21 21:24:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:10,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:10,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:10,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 187 transitions, 2100 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:10,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:10,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:10,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:11,270 INFO L124 PetriNetUnfolderBase]: 527/912 cut-off events. [2024-06-21 21:24:11,270 INFO L125 PetriNetUnfolderBase]: For 66866/66866 co-relation queries the response was YES. [2024-06-21 21:24:11,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 912 events. 527/912 cut-off events. For 66866/66866 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4212 event pairs, 70 based on Foata normal form. 1/911 useless extension candidates. Maximal degree in co-relation 6976. Up to 774 conditions per place. [2024-06-21 21:24:11,277 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 154 selfloop transitions, 46 changer transitions 0/202 dead transitions. [2024-06-21 21:24:11,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 202 transitions, 2536 flow [2024-06-21 21:24:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 21:24:11,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 21:24:11,278 INFO L175 Difference]: Start difference. First operand has 198 places, 187 transitions, 2100 flow. Second operand 9 states and 116 transitions. [2024-06-21 21:24:11,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 202 transitions, 2536 flow [2024-06-21 21:24:11,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 202 transitions, 2431 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:11,443 INFO L231 Difference]: Finished difference. Result has 201 places, 187 transitions, 2094 flow [2024-06-21 21:24:11,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=201, PETRI_TRANSITIONS=187} [2024-06-21 21:24:11,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-21 21:24:11,444 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 187 transitions, 2094 flow [2024-06-21 21:24:11,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:11,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:11,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:11,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:24:11,445 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:11,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1973215417, now seen corresponding path program 6 times [2024-06-21 21:24:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:11,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913771164] [2024-06-21 21:24:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:11,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:12,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:12,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913771164] [2024-06-21 21:24:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913771164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:12,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:12,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:12,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571904179] [2024-06-21 21:24:12,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:12,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:12,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:12,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 187 transitions, 2094 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:12,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:12,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:12,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:12,824 INFO L124 PetriNetUnfolderBase]: 579/996 cut-off events. [2024-06-21 21:24:12,824 INFO L125 PetriNetUnfolderBase]: For 89614/89614 co-relation queries the response was YES. [2024-06-21 21:24:12,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8249 conditions, 996 events. 579/996 cut-off events. For 89614/89614 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4671 event pairs, 78 based on Foata normal form. 4/998 useless extension candidates. Maximal degree in co-relation 8150. Up to 759 conditions per place. [2024-06-21 21:24:12,832 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 164 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2024-06-21 21:24:12,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 221 transitions, 3228 flow [2024-06-21 21:24:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 21:24:12,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 21:24:12,834 INFO L175 Difference]: Start difference. First operand has 201 places, 187 transitions, 2094 flow. Second operand 10 states and 134 transitions. [2024-06-21 21:24:12,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 221 transitions, 3228 flow [2024-06-21 21:24:12,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 221 transitions, 3120 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:12,980 INFO L231 Difference]: Finished difference. Result has 202 places, 198 transitions, 2376 flow [2024-06-21 21:24:12,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2376, PETRI_PLACES=202, PETRI_TRANSITIONS=198} [2024-06-21 21:24:12,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2024-06-21 21:24:12,980 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 198 transitions, 2376 flow [2024-06-21 21:24:12,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:12,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:12,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:12,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:24:12,980 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:12,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:12,981 INFO L85 PathProgramCache]: Analyzing trace with hash -969425575, now seen corresponding path program 7 times [2024-06-21 21:24:12,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:12,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602653829] [2024-06-21 21:24:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:12,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:13,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602653829] [2024-06-21 21:24:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602653829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:13,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:13,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:13,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807649554] [2024-06-21 21:24:13,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:13,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:13,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:13,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:13,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 198 transitions, 2376 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:13,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:13,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:13,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:14,386 INFO L124 PetriNetUnfolderBase]: 585/1006 cut-off events. [2024-06-21 21:24:14,386 INFO L125 PetriNetUnfolderBase]: For 86749/86749 co-relation queries the response was YES. [2024-06-21 21:24:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8415 conditions, 1006 events. 585/1006 cut-off events. For 86749/86749 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4735 event pairs, 74 based on Foata normal form. 2/1006 useless extension candidates. Maximal degree in co-relation 8316. Up to 767 conditions per place. [2024-06-21 21:24:14,395 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 160 selfloop transitions, 61 changer transitions 0/223 dead transitions. [2024-06-21 21:24:14,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 223 transitions, 3310 flow [2024-06-21 21:24:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 21:24:14,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 21:24:14,396 INFO L175 Difference]: Start difference. First operand has 202 places, 198 transitions, 2376 flow. Second operand 10 states and 133 transitions. [2024-06-21 21:24:14,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 223 transitions, 3310 flow [2024-06-21 21:24:14,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 223 transitions, 3175 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 21:24:14,533 INFO L231 Difference]: Finished difference. Result has 208 places, 201 transitions, 2442 flow [2024-06-21 21:24:14,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2442, PETRI_PLACES=208, PETRI_TRANSITIONS=201} [2024-06-21 21:24:14,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 21:24:14,534 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 201 transitions, 2442 flow [2024-06-21 21:24:14,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:14,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:14,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:14,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:24:14,534 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:14,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2127422441, now seen corresponding path program 5 times [2024-06-21 21:24:14,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:14,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732753346] [2024-06-21 21:24:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:14,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:15,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:15,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732753346] [2024-06-21 21:24:15,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732753346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:15,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:15,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063504600] [2024-06-21 21:24:15,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:15,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:15,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:15,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 201 transitions, 2442 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:15,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:15,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:15,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:16,064 INFO L124 PetriNetUnfolderBase]: 589/1014 cut-off events. [2024-06-21 21:24:16,064 INFO L125 PetriNetUnfolderBase]: For 89190/89190 co-relation queries the response was YES. [2024-06-21 21:24:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8492 conditions, 1014 events. 589/1014 cut-off events. For 89190/89190 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4794 event pairs, 91 based on Foata normal form. 2/1014 useless extension candidates. Maximal degree in co-relation 8391. Up to 965 conditions per place. [2024-06-21 21:24:16,073 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 188 selfloop transitions, 24 changer transitions 0/214 dead transitions. [2024-06-21 21:24:16,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 214 transitions, 2912 flow [2024-06-21 21:24:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:24:16,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:24:16,075 INFO L175 Difference]: Start difference. First operand has 208 places, 201 transitions, 2442 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:24:16,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 214 transitions, 2912 flow [2024-06-21 21:24:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 214 transitions, 2789 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:16,218 INFO L231 Difference]: Finished difference. Result has 212 places, 202 transitions, 2391 flow [2024-06-21 21:24:16,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2391, PETRI_PLACES=212, PETRI_TRANSITIONS=202} [2024-06-21 21:24:16,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-21 21:24:16,219 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 202 transitions, 2391 flow [2024-06-21 21:24:16,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:16,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:16,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:24:16,219 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:16,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -962929897, now seen corresponding path program 1 times [2024-06-21 21:24:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032059246] [2024-06-21 21:24:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:17,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:17,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032059246] [2024-06-21 21:24:17,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032059246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:17,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:17,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:17,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328519617] [2024-06-21 21:24:17,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:17,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:17,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:17,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:17,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:17,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:17,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 202 transitions, 2391 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:17,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:17,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:17,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:17,853 INFO L124 PetriNetUnfolderBase]: 593/1022 cut-off events. [2024-06-21 21:24:17,853 INFO L125 PetriNetUnfolderBase]: For 91566/91566 co-relation queries the response was YES. [2024-06-21 21:24:17,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8446 conditions, 1022 events. 593/1022 cut-off events. For 91566/91566 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4842 event pairs, 86 based on Foata normal form. 2/1022 useless extension candidates. Maximal degree in co-relation 8344. Up to 943 conditions per place. [2024-06-21 21:24:17,860 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 184 selfloop transitions, 32 changer transitions 0/218 dead transitions. [2024-06-21 21:24:17,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 218 transitions, 2883 flow [2024-06-21 21:24:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 21:24:17,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 21:24:17,861 INFO L175 Difference]: Start difference. First operand has 212 places, 202 transitions, 2391 flow. Second operand 9 states and 106 transitions. [2024-06-21 21:24:17,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 218 transitions, 2883 flow [2024-06-21 21:24:18,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 218 transitions, 2797 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:18,010 INFO L231 Difference]: Finished difference. Result has 213 places, 205 transitions, 2414 flow [2024-06-21 21:24:18,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2414, PETRI_PLACES=213, PETRI_TRANSITIONS=205} [2024-06-21 21:24:18,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 21:24:18,010 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 205 transitions, 2414 flow [2024-06-21 21:24:18,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:18,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:18,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:18,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:24:18,011 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:18,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash -963169465, now seen corresponding path program 8 times [2024-06-21 21:24:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:18,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017165383] [2024-06-21 21:24:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017165383] [2024-06-21 21:24:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017165383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228272538] [2024-06-21 21:24:19,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:19,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:19,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 205 transitions, 2414 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:19,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:19,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:19,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:19,556 INFO L124 PetriNetUnfolderBase]: 609/1048 cut-off events. [2024-06-21 21:24:19,556 INFO L125 PetriNetUnfolderBase]: For 98825/98825 co-relation queries the response was YES. [2024-06-21 21:24:19,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8804 conditions, 1048 events. 609/1048 cut-off events. For 98825/98825 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5014 event pairs, 76 based on Foata normal form. 2/1048 useless extension candidates. Maximal degree in co-relation 8701. Up to 889 conditions per place. [2024-06-21 21:24:19,565 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-21 21:24:19,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 228 transitions, 3261 flow [2024-06-21 21:24:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 21:24:19,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 21:24:19,566 INFO L175 Difference]: Start difference. First operand has 213 places, 205 transitions, 2414 flow. Second operand 10 states and 126 transitions. [2024-06-21 21:24:19,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 228 transitions, 3261 flow [2024-06-21 21:24:19,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 228 transitions, 3174 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:24:19,743 INFO L231 Difference]: Finished difference. Result has 217 places, 209 transitions, 2516 flow [2024-06-21 21:24:19,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2516, PETRI_PLACES=217, PETRI_TRANSITIONS=209} [2024-06-21 21:24:19,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-06-21 21:24:19,743 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 209 transitions, 2516 flow [2024-06-21 21:24:19,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:19,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:19,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:24:19,744 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:19,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1979471527, now seen corresponding path program 9 times [2024-06-21 21:24:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:19,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688498042] [2024-06-21 21:24:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:20,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:20,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688498042] [2024-06-21 21:24:20,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688498042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:20,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:20,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:20,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095675106] [2024-06-21 21:24:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:20,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:20,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:20,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:20,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:20,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 209 transitions, 2516 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:20,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:20,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:20,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:21,185 INFO L124 PetriNetUnfolderBase]: 601/1036 cut-off events. [2024-06-21 21:24:21,185 INFO L125 PetriNetUnfolderBase]: For 97672/97672 co-relation queries the response was YES. [2024-06-21 21:24:21,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 1036 events. 601/1036 cut-off events. For 97672/97672 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4963 event pairs, 74 based on Foata normal form. 4/1038 useless extension candidates. Maximal degree in co-relation 8429. Up to 885 conditions per place. [2024-06-21 21:24:21,193 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 45 changer transitions 0/227 dead transitions. [2024-06-21 21:24:21,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 227 transitions, 3143 flow [2024-06-21 21:24:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:24:21,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:24:21,194 INFO L175 Difference]: Start difference. First operand has 217 places, 209 transitions, 2516 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:24:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 227 transitions, 3143 flow [2024-06-21 21:24:21,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 227 transitions, 2959 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:21,390 INFO L231 Difference]: Finished difference. Result has 220 places, 209 transitions, 2430 flow [2024-06-21 21:24:21,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2430, PETRI_PLACES=220, PETRI_TRANSITIONS=209} [2024-06-21 21:24:21,391 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 21:24:21,391 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 209 transitions, 2430 flow [2024-06-21 21:24:21,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:21,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:21,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:24:21,391 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:21,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash -188867129, now seen corresponding path program 2 times [2024-06-21 21:24:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:21,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864896149] [2024-06-21 21:24:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:21,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:22,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:22,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864896149] [2024-06-21 21:24:22,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864896149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:22,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:22,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:24:22,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250208482] [2024-06-21 21:24:22,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:22,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:24:22,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:22,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:24:22,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:24:22,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:22,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 209 transitions, 2430 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:22,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:22,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:22,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:22,513 INFO L124 PetriNetUnfolderBase]: 605/1044 cut-off events. [2024-06-21 21:24:22,513 INFO L125 PetriNetUnfolderBase]: For 96355/96355 co-relation queries the response was YES. [2024-06-21 21:24:22,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8498 conditions, 1044 events. 605/1044 cut-off events. For 96355/96355 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5006 event pairs, 81 based on Foata normal form. 2/1044 useless extension candidates. Maximal degree in co-relation 8393. Up to 1009 conditions per place. [2024-06-21 21:24:22,522 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 205 selfloop transitions, 14 changer transitions 0/221 dead transitions. [2024-06-21 21:24:22,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 221 transitions, 2908 flow [2024-06-21 21:24:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 21:24:22,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 21:24:22,523 INFO L175 Difference]: Start difference. First operand has 220 places, 209 transitions, 2430 flow. Second operand 9 states and 98 transitions. [2024-06-21 21:24:22,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 221 transitions, 2908 flow [2024-06-21 21:24:22,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 221 transitions, 2820 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:22,717 INFO L231 Difference]: Finished difference. Result has 221 places, 210 transitions, 2392 flow [2024-06-21 21:24:22,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2392, PETRI_PLACES=221, PETRI_TRANSITIONS=210} [2024-06-21 21:24:22,717 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-21 21:24:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 210 transitions, 2392 flow [2024-06-21 21:24:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:22,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:24:22,718 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:22,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1465356841, now seen corresponding path program 3 times [2024-06-21 21:24:22,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:22,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448227232] [2024-06-21 21:24:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:23,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448227232] [2024-06-21 21:24:23,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448227232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:23,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494778512] [2024-06-21 21:24:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:23,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 210 transitions, 2392 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:23,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:23,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:23,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:24,092 INFO L124 PetriNetUnfolderBase]: 612/1057 cut-off events. [2024-06-21 21:24:24,092 INFO L125 PetriNetUnfolderBase]: For 98975/98975 co-relation queries the response was YES. [2024-06-21 21:24:24,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8538 conditions, 1057 events. 612/1057 cut-off events. For 98975/98975 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5093 event pairs, 81 based on Foata normal form. 2/1057 useless extension candidates. Maximal degree in co-relation 8432. Up to 1018 conditions per place. [2024-06-21 21:24:24,100 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 208 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-21 21:24:24,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 227 transitions, 2915 flow [2024-06-21 21:24:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 21:24:24,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-21 21:24:24,101 INFO L175 Difference]: Start difference. First operand has 221 places, 210 transitions, 2392 flow. Second operand 9 states and 100 transitions. [2024-06-21 21:24:24,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 227 transitions, 2915 flow [2024-06-21 21:24:24,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 227 transitions, 2870 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:24,287 INFO L231 Difference]: Finished difference. Result has 225 places, 216 transitions, 2456 flow [2024-06-21 21:24:24,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2456, PETRI_PLACES=225, PETRI_TRANSITIONS=216} [2024-06-21 21:24:24,287 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 195 predicate places. [2024-06-21 21:24:24,288 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 216 transitions, 2456 flow [2024-06-21 21:24:24,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:24,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:24,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:24,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:24:24,288 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:24,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -933597211, now seen corresponding path program 4 times [2024-06-21 21:24:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698719746] [2024-06-21 21:24:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:25,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:25,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698719746] [2024-06-21 21:24:25,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698719746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:25,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:25,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367813115] [2024-06-21 21:24:25,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:25,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:25,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 216 transitions, 2456 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:25,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:25,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:25,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:25,470 INFO L124 PetriNetUnfolderBase]: 616/1065 cut-off events. [2024-06-21 21:24:25,470 INFO L125 PetriNetUnfolderBase]: For 102064/102064 co-relation queries the response was YES. [2024-06-21 21:24:25,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8756 conditions, 1065 events. 616/1065 cut-off events. For 102064/102064 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5144 event pairs, 81 based on Foata normal form. 2/1065 useless extension candidates. Maximal degree in co-relation 8647. Up to 1030 conditions per place. [2024-06-21 21:24:25,477 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 211 selfloop transitions, 14 changer transitions 0/227 dead transitions. [2024-06-21 21:24:25,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 227 transitions, 2948 flow [2024-06-21 21:24:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 21:24:25,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:24:25,478 INFO L175 Difference]: Start difference. First operand has 225 places, 216 transitions, 2456 flow. Second operand 9 states and 96 transitions. [2024-06-21 21:24:25,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 227 transitions, 2948 flow [2024-06-21 21:24:25,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 227 transitions, 2909 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 21:24:25,676 INFO L231 Difference]: Finished difference. Result has 230 places, 217 transitions, 2471 flow [2024-06-21 21:24:25,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2471, PETRI_PLACES=230, PETRI_TRANSITIONS=217} [2024-06-21 21:24:25,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 21:24:25,676 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 217 transitions, 2471 flow [2024-06-21 21:24:25,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:25,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:25,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:25,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:24:25,677 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:25,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -597433947, now seen corresponding path program 6 times [2024-06-21 21:24:25,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:25,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119787468] [2024-06-21 21:24:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:25,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:26,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:26,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119787468] [2024-06-21 21:24:26,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119787468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:26,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:26,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:26,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809768180] [2024-06-21 21:24:26,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:26,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:26,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:26,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:26,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 217 transitions, 2471 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:26,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:26,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:26,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:27,167 INFO L124 PetriNetUnfolderBase]: 613/1060 cut-off events. [2024-06-21 21:24:27,168 INFO L125 PetriNetUnfolderBase]: For 100302/100302 co-relation queries the response was YES. [2024-06-21 21:24:27,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8609 conditions, 1060 events. 613/1060 cut-off events. For 100302/100302 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5123 event pairs, 82 based on Foata normal form. 2/1060 useless extension candidates. Maximal degree in co-relation 8499. Up to 1030 conditions per place. [2024-06-21 21:24:27,177 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 209 selfloop transitions, 15 changer transitions 0/226 dead transitions. [2024-06-21 21:24:27,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 226 transitions, 2939 flow [2024-06-21 21:24:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:24:27,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:24:27,178 INFO L175 Difference]: Start difference. First operand has 230 places, 217 transitions, 2471 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:24:27,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 226 transitions, 2939 flow [2024-06-21 21:24:27,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 226 transitions, 2895 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:27,408 INFO L231 Difference]: Finished difference. Result has 232 places, 217 transitions, 2461 flow [2024-06-21 21:24:27,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2461, PETRI_PLACES=232, PETRI_TRANSITIONS=217} [2024-06-21 21:24:27,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 21:24:27,408 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 217 transitions, 2461 flow [2024-06-21 21:24:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:27,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:27,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:27,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:24:27,409 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:27,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1969792711, now seen corresponding path program 10 times [2024-06-21 21:24:27,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:27,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444139327] [2024-06-21 21:24:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:28,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:28,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444139327] [2024-06-21 21:24:28,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444139327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:28,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:28,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:28,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300893957] [2024-06-21 21:24:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:28,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:28,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:28,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 217 transitions, 2461 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:28,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:28,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:28,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:28,585 INFO L124 PetriNetUnfolderBase]: 645/1112 cut-off events. [2024-06-21 21:24:28,586 INFO L125 PetriNetUnfolderBase]: For 118528/118528 co-relation queries the response was YES. [2024-06-21 21:24:28,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9342 conditions, 1112 events. 645/1112 cut-off events. For 118528/118528 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5437 event pairs, 77 based on Foata normal form. 4/1114 useless extension candidates. Maximal degree in co-relation 9231. Up to 1009 conditions per place. [2024-06-21 21:24:28,595 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 210 selfloop transitions, 26 changer transitions 0/238 dead transitions. [2024-06-21 21:24:28,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 238 transitions, 3264 flow [2024-06-21 21:24:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:24:28,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:24:28,596 INFO L175 Difference]: Start difference. First operand has 232 places, 217 transitions, 2461 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:24:28,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 238 transitions, 3264 flow [2024-06-21 21:24:28,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 238 transitions, 3178 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:28,819 INFO L231 Difference]: Finished difference. Result has 233 places, 222 transitions, 2566 flow [2024-06-21 21:24:28,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2566, PETRI_PLACES=233, PETRI_TRANSITIONS=222} [2024-06-21 21:24:28,819 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 21:24:28,820 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 222 transitions, 2566 flow [2024-06-21 21:24:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:28,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:28,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:28,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:24:28,820 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:28,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash -361074137, now seen corresponding path program 11 times [2024-06-21 21:24:28,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69240612] [2024-06-21 21:24:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:29,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69240612] [2024-06-21 21:24:29,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69240612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:29,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:29,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:29,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835018343] [2024-06-21 21:24:29,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:29,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:29,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:29,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:29,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:29,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 222 transitions, 2566 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:29,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:29,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:29,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:30,013 INFO L124 PetriNetUnfolderBase]: 641/1106 cut-off events. [2024-06-21 21:24:30,014 INFO L125 PetriNetUnfolderBase]: For 111638/111638 co-relation queries the response was YES. [2024-06-21 21:24:30,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9222 conditions, 1106 events. 641/1106 cut-off events. For 111638/111638 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5379 event pairs, 88 based on Foata normal form. 2/1106 useless extension candidates. Maximal degree in co-relation 9111. Up to 1058 conditions per place. [2024-06-21 21:24:30,022 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 214 selfloop transitions, 20 changer transitions 0/236 dead transitions. [2024-06-21 21:24:30,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 236 transitions, 3110 flow [2024-06-21 21:24:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 21:24:30,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 21:24:30,023 INFO L175 Difference]: Start difference. First operand has 233 places, 222 transitions, 2566 flow. Second operand 10 states and 109 transitions. [2024-06-21 21:24:30,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 236 transitions, 3110 flow [2024-06-21 21:24:30,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 2984 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:30,252 INFO L231 Difference]: Finished difference. Result has 235 places, 224 transitions, 2533 flow [2024-06-21 21:24:30,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2533, PETRI_PLACES=235, PETRI_TRANSITIONS=224} [2024-06-21 21:24:30,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 21:24:30,253 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 224 transitions, 2533 flow [2024-06-21 21:24:30,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:30,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:30,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:30,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:24:30,253 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:30,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash -369348347, now seen corresponding path program 12 times [2024-06-21 21:24:30,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:30,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061915334] [2024-06-21 21:24:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:31,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061915334] [2024-06-21 21:24:31,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061915334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:31,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535047998] [2024-06-21 21:24:31,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:31,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:31,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 224 transitions, 2533 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:31,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:31,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:31,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:31,544 INFO L124 PetriNetUnfolderBase]: 637/1100 cut-off events. [2024-06-21 21:24:31,545 INFO L125 PetriNetUnfolderBase]: For 108072/108072 co-relation queries the response was YES. [2024-06-21 21:24:31,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8906 conditions, 1100 events. 637/1100 cut-off events. For 108072/108072 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5359 event pairs, 79 based on Foata normal form. 2/1100 useless extension candidates. Maximal degree in co-relation 8795. Up to 1002 conditions per place. [2024-06-21 21:24:31,553 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-21 21:24:31,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 241 transitions, 3248 flow [2024-06-21 21:24:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:24:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:24:31,554 INFO L175 Difference]: Start difference. First operand has 235 places, 224 transitions, 2533 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:24:31,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 241 transitions, 3248 flow [2024-06-21 21:24:31,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 241 transitions, 3171 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:31,804 INFO L231 Difference]: Finished difference. Result has 237 places, 226 transitions, 2565 flow [2024-06-21 21:24:31,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2565, PETRI_PLACES=237, PETRI_TRANSITIONS=226} [2024-06-21 21:24:31,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 21:24:31,804 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 226 transitions, 2565 flow [2024-06-21 21:24:31,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:31,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:31,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:31,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:24:31,805 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:31,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2097100455, now seen corresponding path program 13 times [2024-06-21 21:24:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:31,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995850721] [2024-06-21 21:24:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995850721] [2024-06-21 21:24:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995850721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:32,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:32,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783092239] [2024-06-21 21:24:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:32,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:32,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:32,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 226 transitions, 2565 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:32,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:32,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:32,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:33,148 INFO L124 PetriNetUnfolderBase]: 659/1136 cut-off events. [2024-06-21 21:24:33,148 INFO L125 PetriNetUnfolderBase]: For 122377/122377 co-relation queries the response was YES. [2024-06-21 21:24:33,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9434 conditions, 1136 events. 659/1136 cut-off events. For 122377/122377 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5585 event pairs, 71 based on Foata normal form. 4/1138 useless extension candidates. Maximal degree in co-relation 9322. Up to 896 conditions per place. [2024-06-21 21:24:33,157 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 195 selfloop transitions, 52 changer transitions 0/249 dead transitions. [2024-06-21 21:24:33,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 249 transitions, 3566 flow [2024-06-21 21:24:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:24:33,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:24:33,158 INFO L175 Difference]: Start difference. First operand has 237 places, 226 transitions, 2565 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:24:33,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 249 transitions, 3566 flow [2024-06-21 21:24:33,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 249 transitions, 3486 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:33,366 INFO L231 Difference]: Finished difference. Result has 240 places, 231 transitions, 2738 flow [2024-06-21 21:24:33,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2738, PETRI_PLACES=240, PETRI_TRANSITIONS=231} [2024-06-21 21:24:33,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 21:24:33,367 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 231 transitions, 2738 flow [2024-06-21 21:24:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:33,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:33,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:33,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:24:33,367 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:33,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:33,368 INFO L85 PathProgramCache]: Analyzing trace with hash -597249497, now seen corresponding path program 14 times [2024-06-21 21:24:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:33,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564868373] [2024-06-21 21:24:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564868373] [2024-06-21 21:24:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564868373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:34,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:34,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:34,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119818030] [2024-06-21 21:24:34,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:34,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:34,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:34,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:34,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 231 transitions, 2738 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:34,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:34,758 INFO L124 PetriNetUnfolderBase]: 695/1194 cut-off events. [2024-06-21 21:24:34,758 INFO L125 PetriNetUnfolderBase]: For 138922/138922 co-relation queries the response was YES. [2024-06-21 21:24:34,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10556 conditions, 1194 events. 695/1194 cut-off events. For 138922/138922 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 5914 event pairs, 75 based on Foata normal form. 2/1194 useless extension candidates. Maximal degree in co-relation 10443. Up to 919 conditions per place. [2024-06-21 21:24:34,767 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 198 selfloop transitions, 57 changer transitions 0/257 dead transitions. [2024-06-21 21:24:34,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 257 transitions, 3979 flow [2024-06-21 21:24:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 21:24:34,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 21:24:34,769 INFO L175 Difference]: Start difference. First operand has 240 places, 231 transitions, 2738 flow. Second operand 10 states and 125 transitions. [2024-06-21 21:24:34,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 257 transitions, 3979 flow [2024-06-21 21:24:35,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 257 transitions, 3636 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:35,012 INFO L231 Difference]: Finished difference. Result has 242 places, 238 transitions, 2741 flow [2024-06-21 21:24:35,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2741, PETRI_PLACES=242, PETRI_TRANSITIONS=238} [2024-06-21 21:24:35,013 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 21:24:35,013 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 238 transitions, 2741 flow [2024-06-21 21:24:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:35,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:35,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:24:35,013 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:35,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2103529545, now seen corresponding path program 15 times [2024-06-21 21:24:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496398233] [2024-06-21 21:24:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:35,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496398233] [2024-06-21 21:24:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496398233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:35,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875267668] [2024-06-21 21:24:35,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:35,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:35,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 238 transitions, 2741 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:35,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:35,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:35,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:36,309 INFO L124 PetriNetUnfolderBase]: 707/1214 cut-off events. [2024-06-21 21:24:36,309 INFO L125 PetriNetUnfolderBase]: For 145364/145364 co-relation queries the response was YES. [2024-06-21 21:24:36,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10392 conditions, 1214 events. 707/1214 cut-off events. For 145364/145364 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6029 event pairs, 85 based on Foata normal form. 4/1216 useless extension candidates. Maximal degree in co-relation 10279. Up to 1099 conditions per place. [2024-06-21 21:24:36,320 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 226 selfloop transitions, 30 changer transitions 0/258 dead transitions. [2024-06-21 21:24:36,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 258 transitions, 3562 flow [2024-06-21 21:24:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:24:36,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:24:36,321 INFO L175 Difference]: Start difference. First operand has 242 places, 238 transitions, 2741 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:24:36,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 258 transitions, 3562 flow [2024-06-21 21:24:36,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 258 transitions, 3435 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 21:24:36,609 INFO L231 Difference]: Finished difference. Result has 247 places, 241 transitions, 2761 flow [2024-06-21 21:24:36,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2761, PETRI_PLACES=247, PETRI_TRANSITIONS=241} [2024-06-21 21:24:36,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 21:24:36,609 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 241 transitions, 2761 flow [2024-06-21 21:24:36,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:36,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:36,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:36,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:24:36,610 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:36,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:36,610 INFO L85 PathProgramCache]: Analyzing trace with hash -590993387, now seen corresponding path program 16 times [2024-06-21 21:24:36,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:36,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503653589] [2024-06-21 21:24:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:36,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503653589] [2024-06-21 21:24:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503653589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:37,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363687818] [2024-06-21 21:24:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:37,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:37,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:37,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 241 transitions, 2761 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:37,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:37,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:37,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:38,086 INFO L124 PetriNetUnfolderBase]: 703/1208 cut-off events. [2024-06-21 21:24:38,086 INFO L125 PetriNetUnfolderBase]: For 138416/138416 co-relation queries the response was YES. [2024-06-21 21:24:38,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10073 conditions, 1208 events. 703/1208 cut-off events. For 138416/138416 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5988 event pairs, 85 based on Foata normal form. 2/1208 useless extension candidates. Maximal degree in co-relation 9959. Up to 1098 conditions per place. [2024-06-21 21:24:38,096 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 225 selfloop transitions, 32 changer transitions 0/259 dead transitions. [2024-06-21 21:24:38,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 259 transitions, 3537 flow [2024-06-21 21:24:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 21:24:38,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:24:38,097 INFO L175 Difference]: Start difference. First operand has 247 places, 241 transitions, 2761 flow. Second operand 10 states and 120 transitions. [2024-06-21 21:24:38,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 259 transitions, 3537 flow [2024-06-21 21:24:38,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 259 transitions, 3351 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-21 21:24:38,404 INFO L231 Difference]: Finished difference. Result has 247 places, 243 transitions, 2705 flow [2024-06-21 21:24:38,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2705, PETRI_PLACES=247, PETRI_TRANSITIONS=243} [2024-06-21 21:24:38,405 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 21:24:38,405 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 243 transitions, 2705 flow [2024-06-21 21:24:38,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:38,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:38,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:38,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:24:38,405 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:38,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash -590753819, now seen corresponding path program 5 times [2024-06-21 21:24:38,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:38,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700424965] [2024-06-21 21:24:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:38,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:39,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:39,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700424965] [2024-06-21 21:24:39,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700424965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:39,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:39,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242287783] [2024-06-21 21:24:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:39,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 243 transitions, 2705 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:39,777 INFO L124 PetriNetUnfolderBase]: 700/1203 cut-off events. [2024-06-21 21:24:39,777 INFO L125 PetriNetUnfolderBase]: For 136576/136576 co-relation queries the response was YES. [2024-06-21 21:24:39,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9718 conditions, 1203 events. 700/1203 cut-off events. For 136576/136576 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5963 event pairs, 93 based on Foata normal form. 2/1203 useless extension candidates. Maximal degree in co-relation 9605. Up to 1161 conditions per place. [2024-06-21 21:24:39,785 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 234 selfloop transitions, 18 changer transitions 0/254 dead transitions. [2024-06-21 21:24:39,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 254 transitions, 3237 flow [2024-06-21 21:24:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:24:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:24:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 21:24:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 21:24:39,786 INFO L175 Difference]: Start difference. First operand has 247 places, 243 transitions, 2705 flow. Second operand 9 states and 101 transitions. [2024-06-21 21:24:39,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 254 transitions, 3237 flow [2024-06-21 21:24:40,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 254 transitions, 3139 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:40,062 INFO L231 Difference]: Finished difference. Result has 249 places, 243 transitions, 2647 flow [2024-06-21 21:24:40,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2647, PETRI_PLACES=249, PETRI_TRANSITIONS=243} [2024-06-21 21:24:40,063 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 21:24:40,063 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 243 transitions, 2647 flow [2024-06-21 21:24:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:40,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:40,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:40,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:24:40,064 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:40,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1099431381, now seen corresponding path program 17 times [2024-06-21 21:24:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845090753] [2024-06-21 21:24:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:40,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:40,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845090753] [2024-06-21 21:24:40,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845090753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:40,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:40,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052838734] [2024-06-21 21:24:40,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:40,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:41,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:41,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 243 transitions, 2647 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:41,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:41,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:41,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:41,497 INFO L124 PetriNetUnfolderBase]: 696/1197 cut-off events. [2024-06-21 21:24:41,497 INFO L125 PetriNetUnfolderBase]: For 134105/134105 co-relation queries the response was YES. [2024-06-21 21:24:41,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9461 conditions, 1197 events. 696/1197 cut-off events. For 134105/134105 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5968 event pairs, 74 based on Foata normal form. 2/1197 useless extension candidates. Maximal degree in co-relation 9347. Up to 1036 conditions per place. [2024-06-21 21:24:41,508 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 216 selfloop transitions, 45 changer transitions 0/263 dead transitions. [2024-06-21 21:24:41,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 263 transitions, 3270 flow [2024-06-21 21:24:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:24:41,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:24:41,509 INFO L175 Difference]: Start difference. First operand has 249 places, 243 transitions, 2647 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:24:41,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 263 transitions, 3270 flow [2024-06-21 21:24:41,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 263 transitions, 3180 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:41,810 INFO L231 Difference]: Finished difference. Result has 253 places, 249 transitions, 2752 flow [2024-06-21 21:24:41,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2752, PETRI_PLACES=253, PETRI_TRANSITIONS=249} [2024-06-21 21:24:41,811 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 223 predicate places. [2024-06-21 21:24:41,811 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 249 transitions, 2752 flow [2024-06-21 21:24:41,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 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) [2024-06-21 21:24:41,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:41,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:41,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:24:41,811 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:41,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -200609356, now seen corresponding path program 1 times [2024-06-21 21:24:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:41,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316067225] [2024-06-21 21:24:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:41,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:43,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316067225] [2024-06-21 21:24:43,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316067225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:43,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:43,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273097926] [2024-06-21 21:24:43,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:43,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:43,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:43,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 249 transitions, 2752 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:43,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:43,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:43,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:43,614 INFO L124 PetriNetUnfolderBase]: 707/1218 cut-off events. [2024-06-21 21:24:43,614 INFO L125 PetriNetUnfolderBase]: For 141907/141907 co-relation queries the response was YES. [2024-06-21 21:24:43,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9901 conditions, 1218 events. 707/1218 cut-off events. For 141907/141907 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6074 event pairs, 79 based on Foata normal form. 2/1218 useless extension candidates. Maximal degree in co-relation 9785. Up to 1086 conditions per place. [2024-06-21 21:24:43,626 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 249 selfloop transitions, 26 changer transitions 0/277 dead transitions. [2024-06-21 21:24:43,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 277 transitions, 3576 flow [2024-06-21 21:24:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:24:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:24:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 21:24:43,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:24:43,627 INFO L175 Difference]: Start difference. First operand has 253 places, 249 transitions, 2752 flow. Second operand 12 states and 140 transitions. [2024-06-21 21:24:43,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 277 transitions, 3576 flow [2024-06-21 21:24:43,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 277 transitions, 3437 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:43,957 INFO L231 Difference]: Finished difference. Result has 258 places, 251 transitions, 2715 flow [2024-06-21 21:24:43,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2715, PETRI_PLACES=258, PETRI_TRANSITIONS=251} [2024-06-21 21:24:43,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-21 21:24:43,958 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 251 transitions, 2715 flow [2024-06-21 21:24:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:24:43,958 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:43,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -198735406, now seen corresponding path program 2 times [2024-06-21 21:24:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68301255] [2024-06-21 21:24:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:45,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68301255] [2024-06-21 21:24:45,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68301255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:45,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292742199] [2024-06-21 21:24:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:45,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:45,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 251 transitions, 2715 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:45,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:45,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:45,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:45,899 INFO L124 PetriNetUnfolderBase]: 721/1244 cut-off events. [2024-06-21 21:24:45,899 INFO L125 PetriNetUnfolderBase]: For 152974/152974 co-relation queries the response was YES. [2024-06-21 21:24:45,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 1244 events. 721/1244 cut-off events. For 152974/152974 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6265 event pairs, 96 based on Foata normal form. 2/1244 useless extension candidates. Maximal degree in co-relation 9968. Up to 1151 conditions per place. [2024-06-21 21:24:45,910 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 250 selfloop transitions, 28 changer transitions 0/280 dead transitions. [2024-06-21 21:24:45,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 280 transitions, 3573 flow [2024-06-21 21:24:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:24:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:24:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:24:45,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:24:45,912 INFO L175 Difference]: Start difference. First operand has 258 places, 251 transitions, 2715 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:24:45,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 280 transitions, 3573 flow [2024-06-21 21:24:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 280 transitions, 3480 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:46,200 INFO L231 Difference]: Finished difference. Result has 262 places, 255 transitions, 2756 flow [2024-06-21 21:24:46,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2756, PETRI_PLACES=262, PETRI_TRANSITIONS=255} [2024-06-21 21:24:46,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 21:24:46,201 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 255 transitions, 2756 flow [2024-06-21 21:24:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:46,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:24:46,201 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:46,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 829027660, now seen corresponding path program 3 times [2024-06-21 21:24:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:46,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798808228] [2024-06-21 21:24:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:47,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:47,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798808228] [2024-06-21 21:24:47,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798808228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:47,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:47,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:24:47,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457369182] [2024-06-21 21:24:47,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:47,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:24:47,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:47,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:24:47,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:24:47,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:47,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 255 transitions, 2756 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:47,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:47,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:47,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:47,745 INFO L124 PetriNetUnfolderBase]: 722/1247 cut-off events. [2024-06-21 21:24:47,746 INFO L125 PetriNetUnfolderBase]: For 157138/157138 co-relation queries the response was YES. [2024-06-21 21:24:47,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9910 conditions, 1247 events. 722/1247 cut-off events. For 157138/157138 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6300 event pairs, 95 based on Foata normal form. 4/1249 useless extension candidates. Maximal degree in co-relation 9794. Up to 1165 conditions per place. [2024-06-21 21:24:47,758 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 245 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-21 21:24:47,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 274 transitions, 3368 flow [2024-06-21 21:24:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 21:24:47,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 21:24:47,759 INFO L175 Difference]: Start difference. First operand has 262 places, 255 transitions, 2756 flow. Second operand 10 states and 117 transitions. [2024-06-21 21:24:47,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 274 transitions, 3368 flow [2024-06-21 21:24:48,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 274 transitions, 3313 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:24:48,099 INFO L231 Difference]: Finished difference. Result has 265 places, 256 transitions, 2779 flow [2024-06-21 21:24:48,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2779, PETRI_PLACES=265, PETRI_TRANSITIONS=256} [2024-06-21 21:24:48,099 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 21:24:48,100 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 256 transitions, 2779 flow [2024-06-21 21:24:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:24:48,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:48,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:48,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:24:48,100 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:48,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 915715750, now seen corresponding path program 4 times [2024-06-21 21:24:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:48,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459186668] [2024-06-21 21:24:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:48,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:49,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:49,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459186668] [2024-06-21 21:24:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459186668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:49,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:49,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:49,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524765292] [2024-06-21 21:24:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:49,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:49,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:49,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:49,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 256 transitions, 2779 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:49,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:49,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:50,121 INFO L124 PetriNetUnfolderBase]: 719/1242 cut-off events. [2024-06-21 21:24:50,121 INFO L125 PetriNetUnfolderBase]: For 147757/147757 co-relation queries the response was YES. [2024-06-21 21:24:50,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9776 conditions, 1242 events. 719/1242 cut-off events. For 147757/147757 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6276 event pairs, 92 based on Foata normal form. 2/1242 useless extension candidates. Maximal degree in co-relation 9658. Up to 1167 conditions per place. [2024-06-21 21:24:50,132 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 251 selfloop transitions, 23 changer transitions 0/276 dead transitions. [2024-06-21 21:24:50,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 276 transitions, 3383 flow [2024-06-21 21:24:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:24:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:24:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:24:50,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:24:50,133 INFO L175 Difference]: Start difference. First operand has 265 places, 256 transitions, 2779 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:24:50,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 276 transitions, 3383 flow [2024-06-21 21:24:50,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 276 transitions, 3313 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:50,499 INFO L231 Difference]: Finished difference. Result has 268 places, 256 transitions, 2759 flow [2024-06-21 21:24:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2759, PETRI_PLACES=268, PETRI_TRANSITIONS=256} [2024-06-21 21:24:50,500 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 21:24:50,500 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 256 transitions, 2759 flow [2024-06-21 21:24:50,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:50,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:50,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:24:50,500 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:50,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash 915869355, now seen corresponding path program 1 times [2024-06-21 21:24:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:50,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886902035] [2024-06-21 21:24:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:51,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:51,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886902035] [2024-06-21 21:24:51,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886902035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:51,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:51,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:51,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348380659] [2024-06-21 21:24:51,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:51,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:51,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:51,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:51,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:51,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 256 transitions, 2759 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:51,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:51,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:51,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:52,397 INFO L124 PetriNetUnfolderBase]: 715/1236 cut-off events. [2024-06-21 21:24:52,397 INFO L125 PetriNetUnfolderBase]: For 144640/144640 co-relation queries the response was YES. [2024-06-21 21:24:52,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9581 conditions, 1236 events. 715/1236 cut-off events. For 144640/144640 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6233 event pairs, 93 based on Foata normal form. 2/1236 useless extension candidates. Maximal degree in co-relation 9462. Up to 1144 conditions per place. [2024-06-21 21:24:52,408 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 243 selfloop transitions, 29 changer transitions 0/274 dead transitions. [2024-06-21 21:24:52,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 274 transitions, 3357 flow [2024-06-21 21:24:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:24:52,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:24:52,409 INFO L175 Difference]: Start difference. First operand has 268 places, 256 transitions, 2759 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:24:52,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 274 transitions, 3357 flow [2024-06-21 21:24:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 274 transitions, 3263 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 21:24:52,737 INFO L231 Difference]: Finished difference. Result has 268 places, 256 transitions, 2732 flow [2024-06-21 21:24:52,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2732, PETRI_PLACES=268, PETRI_TRANSITIONS=256} [2024-06-21 21:24:52,737 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 21:24:52,737 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 256 transitions, 2732 flow [2024-06-21 21:24:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:52,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:52,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:52,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:24:52,738 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:52,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:52,738 INFO L85 PathProgramCache]: Analyzing trace with hash 673033017, now seen corresponding path program 1 times [2024-06-21 21:24:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038029523] [2024-06-21 21:24:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:54,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:54,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038029523] [2024-06-21 21:24:54,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038029523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:54,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:54,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:54,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444790081] [2024-06-21 21:24:54,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:54,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:54,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:54,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:54,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:54,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:54,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 256 transitions, 2732 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:54,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:54,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:54,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:54,870 INFO L124 PetriNetUnfolderBase]: 719/1244 cut-off events. [2024-06-21 21:24:54,871 INFO L125 PetriNetUnfolderBase]: For 147800/147800 co-relation queries the response was YES. [2024-06-21 21:24:54,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9588 conditions, 1244 events. 719/1244 cut-off events. For 147800/147800 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6339 event pairs, 69 based on Foata normal form. 2/1244 useless extension candidates. Maximal degree in co-relation 9469. Up to 1060 conditions per place. [2024-06-21 21:24:54,883 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 219 selfloop transitions, 54 changer transitions 0/275 dead transitions. [2024-06-21 21:24:54,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 275 transitions, 3336 flow [2024-06-21 21:24:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:24:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:24:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 21:24:54,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 21:24:54,884 INFO L175 Difference]: Start difference. First operand has 268 places, 256 transitions, 2732 flow. Second operand 10 states and 122 transitions. [2024-06-21 21:24:54,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 275 transitions, 3336 flow [2024-06-21 21:24:55,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 275 transitions, 3283 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:55,219 INFO L231 Difference]: Finished difference. Result has 270 places, 257 transitions, 2799 flow [2024-06-21 21:24:55,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2799, PETRI_PLACES=270, PETRI_TRANSITIONS=257} [2024-06-21 21:24:55,220 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 21:24:55,220 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 257 transitions, 2799 flow [2024-06-21 21:24:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:55,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:55,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:24:55,220 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:55,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash 200492519, now seen corresponding path program 2 times [2024-06-21 21:24:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744148862] [2024-06-21 21:24:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:55,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:56,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:56,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744148862] [2024-06-21 21:24:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744148862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:56,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:56,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675885003] [2024-06-21 21:24:56,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:56,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:56,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:56,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 257 transitions, 2799 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:56,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:56,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:56,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:57,226 INFO L124 PetriNetUnfolderBase]: 725/1254 cut-off events. [2024-06-21 21:24:57,226 INFO L125 PetriNetUnfolderBase]: For 151498/151498 co-relation queries the response was YES. [2024-06-21 21:24:57,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9792 conditions, 1254 events. 725/1254 cut-off events. For 151498/151498 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 6365 event pairs, 73 based on Foata normal form. 2/1254 useless extension candidates. Maximal degree in co-relation 9672. Up to 601 conditions per place. [2024-06-21 21:24:57,237 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 134 changer transitions 0/282 dead transitions. [2024-06-21 21:24:57,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 282 transitions, 3803 flow [2024-06-21 21:24:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:24:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:24:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 21:24:57,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 21:24:57,239 INFO L175 Difference]: Start difference. First operand has 270 places, 257 transitions, 2799 flow. Second operand 11 states and 145 transitions. [2024-06-21 21:24:57,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 282 transitions, 3803 flow [2024-06-21 21:24:57,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 282 transitions, 3693 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:24:57,642 INFO L231 Difference]: Finished difference. Result has 273 places, 259 transitions, 3002 flow [2024-06-21 21:24:57,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3002, PETRI_PLACES=273, PETRI_TRANSITIONS=259} [2024-06-21 21:24:57,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 21:24:57,643 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 259 transitions, 3002 flow [2024-06-21 21:24:57,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:57,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:57,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:24:57,643 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:57,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 194774724, now seen corresponding path program 5 times [2024-06-21 21:24:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:57,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175225821] [2024-06-21 21:24:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:57,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:24:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:24:58,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:24:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175225821] [2024-06-21 21:24:58,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175225821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:24:58,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:24:58,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:24:58,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355812940] [2024-06-21 21:24:58,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:24:58,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:24:58,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:24:58,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:24:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:24:59,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:24:59,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 259 transitions, 3002 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:24:59,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:24:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:24:59,492 INFO L124 PetriNetUnfolderBase]: 736/1275 cut-off events. [2024-06-21 21:24:59,492 INFO L125 PetriNetUnfolderBase]: For 163591/163591 co-relation queries the response was YES. [2024-06-21 21:24:59,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10392 conditions, 1275 events. 736/1275 cut-off events. For 163591/163591 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6517 event pairs, 84 based on Foata normal form. 2/1275 useless extension candidates. Maximal degree in co-relation 10271. Up to 1022 conditions per place. [2024-06-21 21:24:59,503 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 207 selfloop transitions, 72 changer transitions 0/281 dead transitions. [2024-06-21 21:24:59,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 281 transitions, 3832 flow [2024-06-21 21:24:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:24:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:24:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 21:24:59,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 21:24:59,505 INFO L175 Difference]: Start difference. First operand has 273 places, 259 transitions, 3002 flow. Second operand 11 states and 137 transitions. [2024-06-21 21:24:59,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 281 transitions, 3832 flow [2024-06-21 21:24:59,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 281 transitions, 3536 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 21:24:59,902 INFO L231 Difference]: Finished difference. Result has 275 places, 261 transitions, 2904 flow [2024-06-21 21:24:59,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2904, PETRI_PLACES=275, PETRI_TRANSITIONS=261} [2024-06-21 21:24:59,903 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-21 21:24:59,903 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 261 transitions, 2904 flow [2024-06-21 21:24:59,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:24:59,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:24:59,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:24:59,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:24:59,903 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:24:59,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:24:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash 672823271, now seen corresponding path program 3 times [2024-06-21 21:24:59,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:24:59,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295787904] [2024-06-21 21:24:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:24:59,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:24:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295787904] [2024-06-21 21:25:01,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295787904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:01,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:01,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:01,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380587201] [2024-06-21 21:25:01,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:01,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:01,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:01,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:01,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:01,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:01,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 261 transitions, 2904 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:01,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:01,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:01,728 INFO L124 PetriNetUnfolderBase]: 732/1269 cut-off events. [2024-06-21 21:25:01,728 INFO L125 PetriNetUnfolderBase]: For 159256/159256 co-relation queries the response was YES. [2024-06-21 21:25:01,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9988 conditions, 1269 events. 732/1269 cut-off events. For 159256/159256 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6504 event pairs, 79 based on Foata normal form. 2/1269 useless extension candidates. Maximal degree in co-relation 9866. Up to 619 conditions per place. [2024-06-21 21:25:01,739 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 156 selfloop transitions, 126 changer transitions 0/284 dead transitions. [2024-06-21 21:25:01,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 284 transitions, 3880 flow [2024-06-21 21:25:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 21:25:01,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 21:25:01,740 INFO L175 Difference]: Start difference. First operand has 275 places, 261 transitions, 2904 flow. Second operand 11 states and 146 transitions. [2024-06-21 21:25:01,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 284 transitions, 3880 flow [2024-06-21 21:25:02,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 284 transitions, 3731 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:25:02,160 INFO L231 Difference]: Finished difference. Result has 280 places, 261 transitions, 3012 flow [2024-06-21 21:25:02,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3012, PETRI_PLACES=280, PETRI_TRANSITIONS=261} [2024-06-21 21:25:02,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-21 21:25:02,160 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 261 transitions, 3012 flow [2024-06-21 21:25:02,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:02,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:02,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:02,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:25:02,160 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:02,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash 672817536, now seen corresponding path program 6 times [2024-06-21 21:25:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:02,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592177534] [2024-06-21 21:25:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:02,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:03,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592177534] [2024-06-21 21:25:03,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592177534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:03,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:03,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:03,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055426555] [2024-06-21 21:25:03,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:03,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:03,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:03,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:03,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:03,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 261 transitions, 3012 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:03,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:03,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:03,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:04,468 INFO L124 PetriNetUnfolderBase]: 742/1287 cut-off events. [2024-06-21 21:25:04,468 INFO L125 PetriNetUnfolderBase]: For 163157/163157 co-relation queries the response was YES. [2024-06-21 21:25:04,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10287 conditions, 1287 events. 742/1287 cut-off events. For 163157/163157 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 6640 event pairs, 86 based on Foata normal form. 2/1287 useless extension candidates. Maximal degree in co-relation 10163. Up to 1036 conditions per place. [2024-06-21 21:25:04,477 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 207 selfloop transitions, 75 changer transitions 0/284 dead transitions. [2024-06-21 21:25:04,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 284 transitions, 3658 flow [2024-06-21 21:25:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:25:04,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:25:04,478 INFO L175 Difference]: Start difference. First operand has 280 places, 261 transitions, 3012 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:25:04,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 284 transitions, 3658 flow [2024-06-21 21:25:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 284 transitions, 3369 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 21:25:04,915 INFO L231 Difference]: Finished difference. Result has 281 places, 265 transitions, 2957 flow [2024-06-21 21:25:04,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2957, PETRI_PLACES=281, PETRI_TRANSITIONS=265} [2024-06-21 21:25:04,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 21:25:04,915 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 265 transitions, 2957 flow [2024-06-21 21:25:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:04,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:04,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:25:04,916 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:04,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash 194928329, now seen corresponding path program 4 times [2024-06-21 21:25:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:04,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394992910] [2024-06-21 21:25:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:06,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:06,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394992910] [2024-06-21 21:25:06,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394992910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:06,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:06,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:06,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673298335] [2024-06-21 21:25:06,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:06,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:06,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:06,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:06,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:06,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:06,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 265 transitions, 2957 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:06,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:06,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:06,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:07,263 INFO L124 PetriNetUnfolderBase]: 738/1281 cut-off events. [2024-06-21 21:25:07,263 INFO L125 PetriNetUnfolderBase]: For 158487/158487 co-relation queries the response was YES. [2024-06-21 21:25:07,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10004 conditions, 1281 events. 738/1281 cut-off events. For 158487/158487 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 6588 event pairs, 85 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 9878. Up to 634 conditions per place. [2024-06-21 21:25:07,276 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 123 changer transitions 0/287 dead transitions. [2024-06-21 21:25:07,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 287 transitions, 3769 flow [2024-06-21 21:25:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 21:25:07,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 21:25:07,277 INFO L175 Difference]: Start difference. First operand has 281 places, 265 transitions, 2957 flow. Second operand 11 states and 146 transitions. [2024-06-21 21:25:07,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 287 transitions, 3769 flow [2024-06-21 21:25:07,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 287 transitions, 3631 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:25:07,728 INFO L231 Difference]: Finished difference. Result has 284 places, 265 transitions, 3070 flow [2024-06-21 21:25:07,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3070, PETRI_PLACES=284, PETRI_TRANSITIONS=265} [2024-06-21 21:25:07,729 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 21:25:07,729 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 265 transitions, 3070 flow [2024-06-21 21:25:07,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:07,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:07,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:07,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:25:07,729 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:07,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -832980902, now seen corresponding path program 7 times [2024-06-21 21:25:07,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:07,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759497513] [2024-06-21 21:25:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:07,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:08,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:08,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759497513] [2024-06-21 21:25:08,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759497513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:08,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:08,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:08,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060664338] [2024-06-21 21:25:08,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:08,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:08,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:09,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 265 transitions, 3070 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:09,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:09,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:09,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:09,569 INFO L124 PetriNetUnfolderBase]: 745/1294 cut-off events. [2024-06-21 21:25:09,569 INFO L125 PetriNetUnfolderBase]: For 162885/162885 co-relation queries the response was YES. [2024-06-21 21:25:09,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10274 conditions, 1294 events. 745/1294 cut-off events. For 162885/162885 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6673 event pairs, 88 based on Foata normal form. 2/1294 useless extension candidates. Maximal degree in co-relation 10147. Up to 1059 conditions per place. [2024-06-21 21:25:09,582 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 73 changer transitions 0/286 dead transitions. [2024-06-21 21:25:09,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 286 transitions, 3728 flow [2024-06-21 21:25:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 21:25:09,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 21:25:09,583 INFO L175 Difference]: Start difference. First operand has 284 places, 265 transitions, 3070 flow. Second operand 11 states and 135 transitions. [2024-06-21 21:25:09,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 286 transitions, 3728 flow [2024-06-21 21:25:10,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 286 transitions, 3469 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 21:25:10,040 INFO L231 Difference]: Finished difference. Result has 285 places, 268 transitions, 3003 flow [2024-06-21 21:25:10,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3003, PETRI_PLACES=285, PETRI_TRANSITIONS=268} [2024-06-21 21:25:10,041 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 21:25:10,041 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 268 transitions, 3003 flow [2024-06-21 21:25:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:10,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:10,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:25:10,041 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:10,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -832836752, now seen corresponding path program 8 times [2024-06-21 21:25:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:10,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357446286] [2024-06-21 21:25:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357446286] [2024-06-21 21:25:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357446286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995307353] [2024-06-21 21:25:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:11,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:11,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:11,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:11,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:11,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:11,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 268 transitions, 3003 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:12,423 INFO L124 PetriNetUnfolderBase]: 742/1289 cut-off events. [2024-06-21 21:25:12,423 INFO L125 PetriNetUnfolderBase]: For 157794/157794 co-relation queries the response was YES. [2024-06-21 21:25:12,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1289 events. 742/1289 cut-off events. For 157794/157794 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6665 event pairs, 87 based on Foata normal form. 2/1289 useless extension candidates. Maximal degree in co-relation 9804. Up to 1063 conditions per place. [2024-06-21 21:25:12,435 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 216 selfloop transitions, 68 changer transitions 0/286 dead transitions. [2024-06-21 21:25:12,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 286 transitions, 3621 flow [2024-06-21 21:25:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:25:12,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:25:12,436 INFO L175 Difference]: Start difference. First operand has 285 places, 268 transitions, 3003 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:25:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 286 transitions, 3621 flow [2024-06-21 21:25:12,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 286 transitions, 3457 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:25:12,877 INFO L231 Difference]: Finished difference. Result has 288 places, 268 transitions, 2979 flow [2024-06-21 21:25:12,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2979, PETRI_PLACES=288, PETRI_TRANSITIONS=268} [2024-06-21 21:25:12,878 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 21:25:12,878 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 268 transitions, 2979 flow [2024-06-21 21:25:12,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:12,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:12,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:12,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:25:12,878 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:12,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash 12371486, now seen corresponding path program 9 times [2024-06-21 21:25:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:12,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278793229] [2024-06-21 21:25:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:14,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:14,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278793229] [2024-06-21 21:25:14,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278793229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:14,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:14,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:14,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230457195] [2024-06-21 21:25:14,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:14,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:14,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 268 transitions, 2979 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:14,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:14,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:14,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:14,753 INFO L124 PetriNetUnfolderBase]: 746/1297 cut-off events. [2024-06-21 21:25:14,753 INFO L125 PetriNetUnfolderBase]: For 161248/161248 co-relation queries the response was YES. [2024-06-21 21:25:14,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9987 conditions, 1297 events. 746/1297 cut-off events. For 161248/161248 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6714 event pairs, 80 based on Foata normal form. 2/1297 useless extension candidates. Maximal degree in co-relation 9858. Up to 1163 conditions per place. [2024-06-21 21:25:14,765 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 237 selfloop transitions, 47 changer transitions 0/286 dead transitions. [2024-06-21 21:25:14,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 286 transitions, 3630 flow [2024-06-21 21:25:14,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:25:14,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:25:14,766 INFO L175 Difference]: Start difference. First operand has 288 places, 268 transitions, 2979 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:25:14,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 286 transitions, 3630 flow [2024-06-21 21:25:15,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 286 transitions, 3469 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:25:15,152 INFO L231 Difference]: Finished difference. Result has 288 places, 270 transitions, 2959 flow [2024-06-21 21:25:15,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2959, PETRI_PLACES=288, PETRI_TRANSITIONS=270} [2024-06-21 21:25:15,153 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 21:25:15,153 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 270 transitions, 2959 flow [2024-06-21 21:25:15,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:15,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:15,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:25:15,154 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash 213935687, now seen corresponding path program 2 times [2024-06-21 21:25:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245679557] [2024-06-21 21:25:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:16,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:16,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245679557] [2024-06-21 21:25:16,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245679557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:16,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:16,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:16,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055683218] [2024-06-21 21:25:16,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:16,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:16,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:16,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:16,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:16,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 270 transitions, 2959 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:16,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:16,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:16,936 INFO L124 PetriNetUnfolderBase]: 750/1305 cut-off events. [2024-06-21 21:25:16,936 INFO L125 PetriNetUnfolderBase]: For 164504/164504 co-relation queries the response was YES. [2024-06-21 21:25:16,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9985 conditions, 1305 events. 750/1305 cut-off events. For 164504/164504 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 6801 event pairs, 86 based on Foata normal form. 2/1305 useless extension candidates. Maximal degree in co-relation 9855. Up to 1216 conditions per place. [2024-06-21 21:25:16,949 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 251 selfloop transitions, 34 changer transitions 0/287 dead transitions. [2024-06-21 21:25:16,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 287 transitions, 3588 flow [2024-06-21 21:25:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:25:16,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:25:16,949 INFO L175 Difference]: Start difference. First operand has 288 places, 270 transitions, 2959 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:25:16,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 287 transitions, 3588 flow [2024-06-21 21:25:17,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 287 transitions, 3484 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:25:17,333 INFO L231 Difference]: Finished difference. Result has 292 places, 272 transitions, 2954 flow [2024-06-21 21:25:17,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2954, PETRI_PLACES=292, PETRI_TRANSITIONS=272} [2024-06-21 21:25:17,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-21 21:25:17,334 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 272 transitions, 2954 flow [2024-06-21 21:25:17,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:17,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:17,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:17,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:25:17,334 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:17,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 206526377, now seen corresponding path program 3 times [2024-06-21 21:25:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663229766] [2024-06-21 21:25:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:18,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663229766] [2024-06-21 21:25:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663229766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:18,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:18,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671424150] [2024-06-21 21:25:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:18,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:18,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:18,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:18,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 272 transitions, 2954 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:18,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:18,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:18,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:19,406 INFO L124 PetriNetUnfolderBase]: 754/1313 cut-off events. [2024-06-21 21:25:19,406 INFO L125 PetriNetUnfolderBase]: For 167664/167664 co-relation queries the response was YES. [2024-06-21 21:25:19,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10011 conditions, 1313 events. 754/1313 cut-off events. For 167664/167664 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 6845 event pairs, 80 based on Foata normal form. 2/1313 useless extension candidates. Maximal degree in co-relation 9879. Up to 1204 conditions per place. [2024-06-21 21:25:19,418 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 248 selfloop transitions, 39 changer transitions 0/289 dead transitions. [2024-06-21 21:25:19,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 289 transitions, 3582 flow [2024-06-21 21:25:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 21:25:19,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:25:19,419 INFO L175 Difference]: Start difference. First operand has 292 places, 272 transitions, 2954 flow. Second operand 10 states and 120 transitions. [2024-06-21 21:25:19,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 289 transitions, 3582 flow [2024-06-21 21:25:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 289 transitions, 3514 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:25:19,870 INFO L231 Difference]: Finished difference. Result has 295 places, 273 transitions, 2980 flow [2024-06-21 21:25:19,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2980, PETRI_PLACES=295, PETRI_TRANSITIONS=273} [2024-06-21 21:25:19,870 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-21 21:25:19,870 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 273 transitions, 2980 flow [2024-06-21 21:25:19,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:19,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:19,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:19,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:25:19,871 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:19,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash 213944987, now seen corresponding path program 4 times [2024-06-21 21:25:19,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:19,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457033023] [2024-06-21 21:25:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:19,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:20,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:20,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457033023] [2024-06-21 21:25:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457033023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:20,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449970507] [2024-06-21 21:25:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:21,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:21,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 273 transitions, 2980 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:21,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:21,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:21,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:21,505 INFO L124 PetriNetUnfolderBase]: 758/1321 cut-off events. [2024-06-21 21:25:21,505 INFO L125 PetriNetUnfolderBase]: For 171272/171272 co-relation queries the response was YES. [2024-06-21 21:25:21,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10106 conditions, 1321 events. 758/1321 cut-off events. For 171272/171272 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 6893 event pairs, 86 based on Foata normal form. 2/1321 useless extension candidates. Maximal degree in co-relation 9973. Up to 1234 conditions per place. [2024-06-21 21:25:21,516 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 254 selfloop transitions, 33 changer transitions 0/289 dead transitions. [2024-06-21 21:25:21,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 289 transitions, 3604 flow [2024-06-21 21:25:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 21:25:21,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:25:21,517 INFO L175 Difference]: Start difference. First operand has 295 places, 273 transitions, 2980 flow. Second operand 10 states and 115 transitions. [2024-06-21 21:25:21,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 289 transitions, 3604 flow [2024-06-21 21:25:21,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 289 transitions, 3520 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:25:21,970 INFO L231 Difference]: Finished difference. Result has 297 places, 274 transitions, 2980 flow [2024-06-21 21:25:21,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2980, PETRI_PLACES=297, PETRI_TRANSITIONS=274} [2024-06-21 21:25:21,971 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-21 21:25:21,971 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 274 transitions, 2980 flow [2024-06-21 21:25:21,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:21,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:21,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:21,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:25:21,971 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:21,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:21,971 INFO L85 PathProgramCache]: Analyzing trace with hash 12586967, now seen corresponding path program 5 times [2024-06-21 21:25:21,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:21,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077280324] [2024-06-21 21:25:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:21,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077280324] [2024-06-21 21:25:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077280324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:23,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:23,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590275123] [2024-06-21 21:25:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:23,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:23,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:23,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:23,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 274 transitions, 2980 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:23,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:23,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:23,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:23,801 INFO L124 PetriNetUnfolderBase]: 762/1329 cut-off events. [2024-06-21 21:25:23,802 INFO L125 PetriNetUnfolderBase]: For 174961/174961 co-relation queries the response was YES. [2024-06-21 21:25:23,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10163 conditions, 1329 events. 762/1329 cut-off events. For 174961/174961 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 6965 event pairs, 78 based on Foata normal form. 2/1329 useless extension candidates. Maximal degree in co-relation 10029. Up to 1206 conditions per place. [2024-06-21 21:25:23,816 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 247 selfloop transitions, 42 changer transitions 0/291 dead transitions. [2024-06-21 21:25:23,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 291 transitions, 3616 flow [2024-06-21 21:25:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 21:25:23,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 21:25:23,818 INFO L175 Difference]: Start difference. First operand has 297 places, 274 transitions, 2980 flow. Second operand 10 states and 122 transitions. [2024-06-21 21:25:23,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 291 transitions, 3616 flow [2024-06-21 21:25:24,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 291 transitions, 3542 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:25:24,289 INFO L231 Difference]: Finished difference. Result has 299 places, 275 transitions, 3010 flow [2024-06-21 21:25:24,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3010, PETRI_PLACES=299, PETRI_TRANSITIONS=275} [2024-06-21 21:25:24,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-21 21:25:24,289 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 275 transitions, 3010 flow [2024-06-21 21:25:24,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:24,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:24,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:24,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:25:24,290 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:24,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash 12579031, now seen corresponding path program 5 times [2024-06-21 21:25:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827755801] [2024-06-21 21:25:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:25,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:25,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827755801] [2024-06-21 21:25:25,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827755801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:25,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:25,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966703437] [2024-06-21 21:25:25,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:25,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:25,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:25,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 275 transitions, 3010 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:25,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:25,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:25,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:26,111 INFO L124 PetriNetUnfolderBase]: 768/1339 cut-off events. [2024-06-21 21:25:26,111 INFO L125 PetriNetUnfolderBase]: For 179192/179192 co-relation queries the response was YES. [2024-06-21 21:25:26,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10288 conditions, 1339 events. 768/1339 cut-off events. For 179192/179192 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 7066 event pairs, 77 based on Foata normal form. 2/1339 useless extension candidates. Maximal degree in co-relation 10153. Up to 1169 conditions per place. [2024-06-21 21:25:26,124 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 240 selfloop transitions, 53 changer transitions 0/295 dead transitions. [2024-06-21 21:25:26,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 295 transitions, 3688 flow [2024-06-21 21:25:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 21:25:26,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 21:25:26,125 INFO L175 Difference]: Start difference. First operand has 299 places, 275 transitions, 3010 flow. Second operand 11 states and 135 transitions. [2024-06-21 21:25:26,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 295 transitions, 3688 flow [2024-06-21 21:25:26,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 295 transitions, 3594 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:25:26,578 INFO L231 Difference]: Finished difference. Result has 302 places, 277 transitions, 3071 flow [2024-06-21 21:25:26,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3071, PETRI_PLACES=302, PETRI_TRANSITIONS=277} [2024-06-21 21:25:26,578 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-21 21:25:26,578 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 277 transitions, 3071 flow [2024-06-21 21:25:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:26,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:26,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:26,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:25:26,579 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:26,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash 12377221, now seen corresponding path program 6 times [2024-06-21 21:25:26,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:26,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607185182] [2024-06-21 21:25:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:27,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607185182] [2024-06-21 21:25:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607185182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:27,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:27,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931128808] [2024-06-21 21:25:27,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:27,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:27,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:28,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:28,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 277 transitions, 3071 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:28,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:28,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:28,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:28,578 INFO L124 PetriNetUnfolderBase]: 764/1333 cut-off events. [2024-06-21 21:25:28,578 INFO L125 PetriNetUnfolderBase]: For 172997/172997 co-relation queries the response was YES. [2024-06-21 21:25:28,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 1333 events. 764/1333 cut-off events. For 172997/172997 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 7008 event pairs, 80 based on Foata normal form. 2/1333 useless extension candidates. Maximal degree in co-relation 9978. Up to 1086 conditions per place. [2024-06-21 21:25:28,592 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 233 selfloop transitions, 63 changer transitions 0/298 dead transitions. [2024-06-21 21:25:28,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 298 transitions, 4111 flow [2024-06-21 21:25:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 21:25:28,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:25:28,595 INFO L175 Difference]: Start difference. First operand has 302 places, 277 transitions, 3071 flow. Second operand 11 states and 143 transitions. [2024-06-21 21:25:28,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 298 transitions, 4111 flow [2024-06-21 21:25:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 298 transitions, 3980 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:25:29,120 INFO L231 Difference]: Finished difference. Result has 306 places, 277 transitions, 3071 flow [2024-06-21 21:25:29,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3071, PETRI_PLACES=306, PETRI_TRANSITIONS=277} [2024-06-21 21:25:29,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-21 21:25:29,120 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 277 transitions, 3071 flow [2024-06-21 21:25:29,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:29,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:29,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:25:29,121 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:29,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash 206310896, now seen corresponding path program 10 times [2024-06-21 21:25:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:29,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062872680] [2024-06-21 21:25:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062872680] [2024-06-21 21:25:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062872680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:30,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:30,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:30,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919329487] [2024-06-21 21:25:30,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:30,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:30,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 277 transitions, 3071 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:30,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:30,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:30,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:30,981 INFO L124 PetriNetUnfolderBase]: 784/1377 cut-off events. [2024-06-21 21:25:30,982 INFO L125 PetriNetUnfolderBase]: For 223970/223970 co-relation queries the response was YES. [2024-06-21 21:25:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10358 conditions, 1377 events. 784/1377 cut-off events. For 223970/223970 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7312 event pairs, 90 based on Foata normal form. 12/1387 useless extension candidates. Maximal degree in co-relation 10221. Up to 1219 conditions per place. [2024-06-21 21:25:30,995 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 253 selfloop transitions, 39 changer transitions 6/300 dead transitions. [2024-06-21 21:25:30,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 300 transitions, 3793 flow [2024-06-21 21:25:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 21:25:30,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 21:25:30,996 INFO L175 Difference]: Start difference. First operand has 306 places, 277 transitions, 3071 flow. Second operand 11 states and 135 transitions. [2024-06-21 21:25:30,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 300 transitions, 3793 flow [2024-06-21 21:25:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 300 transitions, 3649 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:25:31,542 INFO L231 Difference]: Finished difference. Result has 307 places, 277 transitions, 3029 flow [2024-06-21 21:25:31,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3029, PETRI_PLACES=307, PETRI_TRANSITIONS=277} [2024-06-21 21:25:31,542 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 21:25:31,542 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 277 transitions, 3029 flow [2024-06-21 21:25:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:31,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:31,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:31,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:25:31,543 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:31,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 7014841, now seen corresponding path program 7 times [2024-06-21 21:25:31,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:31,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475188508] [2024-06-21 21:25:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:31,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:32,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475188508] [2024-06-21 21:25:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475188508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493025400] [2024-06-21 21:25:32,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:32,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:32,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 277 transitions, 3029 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:32,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:32,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:32,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:33,579 INFO L124 PetriNetUnfolderBase]: 770/1355 cut-off events. [2024-06-21 21:25:33,579 INFO L125 PetriNetUnfolderBase]: For 170707/170707 co-relation queries the response was YES. [2024-06-21 21:25:33,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9786 conditions, 1355 events. 770/1355 cut-off events. For 170707/170707 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 7203 event pairs, 80 based on Foata normal form. 4/1357 useless extension candidates. Maximal degree in co-relation 9648. Up to 1114 conditions per place. [2024-06-21 21:25:33,592 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 229 selfloop transitions, 65 changer transitions 0/296 dead transitions. [2024-06-21 21:25:33,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 296 transitions, 3869 flow [2024-06-21 21:25:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 21:25:33,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 21:25:33,593 INFO L175 Difference]: Start difference. First operand has 307 places, 277 transitions, 3029 flow. Second operand 11 states and 139 transitions. [2024-06-21 21:25:33,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 296 transitions, 3869 flow [2024-06-21 21:25:34,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 296 transitions, 3685 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-21 21:25:34,060 INFO L231 Difference]: Finished difference. Result has 308 places, 277 transitions, 2988 flow [2024-06-21 21:25:34,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2988, PETRI_PLACES=308, PETRI_TRANSITIONS=277} [2024-06-21 21:25:34,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-21 21:25:34,061 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 277 transitions, 2988 flow [2024-06-21 21:25:34,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:34,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:34,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:34,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:25:34,061 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:34,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:34,061 INFO L85 PathProgramCache]: Analyzing trace with hash 206316631, now seen corresponding path program 8 times [2024-06-21 21:25:34,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:34,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424535531] [2024-06-21 21:25:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:34,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:35,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:35,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424535531] [2024-06-21 21:25:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424535531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:35,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:35,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659029438] [2024-06-21 21:25:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:35,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:35,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:35,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:35,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 277 transitions, 2988 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:35,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:35,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:35,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:35,841 INFO L124 PetriNetUnfolderBase]: 776/1365 cut-off events. [2024-06-21 21:25:35,841 INFO L125 PetriNetUnfolderBase]: For 166839/166839 co-relation queries the response was YES. [2024-06-21 21:25:35,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9863 conditions, 1365 events. 776/1365 cut-off events. For 166839/166839 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 7260 event pairs, 84 based on Foata normal form. 2/1365 useless extension candidates. Maximal degree in co-relation 9724. Up to 1238 conditions per place. [2024-06-21 21:25:35,855 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 252 selfloop transitions, 43 changer transitions 0/297 dead transitions. [2024-06-21 21:25:35,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 297 transitions, 3674 flow [2024-06-21 21:25:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 21:25:35,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 21:25:35,856 INFO L175 Difference]: Start difference. First operand has 308 places, 277 transitions, 2988 flow. Second operand 11 states and 131 transitions. [2024-06-21 21:25:35,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 297 transitions, 3674 flow [2024-06-21 21:25:36,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 297 transitions, 3486 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 21:25:36,366 INFO L231 Difference]: Finished difference. Result has 307 places, 279 transitions, 2939 flow [2024-06-21 21:25:36,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2939, PETRI_PLACES=307, PETRI_TRANSITIONS=279} [2024-06-21 21:25:36,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 21:25:36,367 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 279 transitions, 2939 flow [2024-06-21 21:25:36,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:36,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:36,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:36,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:25:36,368 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:36,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash 206518441, now seen corresponding path program 9 times [2024-06-21 21:25:36,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:36,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999650097] [2024-06-21 21:25:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:36,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999650097] [2024-06-21 21:25:37,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999650097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:37,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:37,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549207623] [2024-06-21 21:25:37,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:37,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:37,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:37,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 279 transitions, 2939 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:37,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:37,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:37,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:38,187 INFO L124 PetriNetUnfolderBase]: 772/1359 cut-off events. [2024-06-21 21:25:38,187 INFO L125 PetriNetUnfolderBase]: For 156378/156378 co-relation queries the response was YES. [2024-06-21 21:25:38,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9525 conditions, 1359 events. 772/1359 cut-off events. For 156378/156378 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 7234 event pairs, 83 based on Foata normal form. 2/1359 useless extension candidates. Maximal degree in co-relation 9386. Up to 1232 conditions per place. [2024-06-21 21:25:38,201 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 253 selfloop transitions, 42 changer transitions 0/297 dead transitions. [2024-06-21 21:25:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 297 transitions, 3581 flow [2024-06-21 21:25:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:25:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:25:38,202 INFO L175 Difference]: Start difference. First operand has 307 places, 279 transitions, 2939 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:25:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 297 transitions, 3581 flow [2024-06-21 21:25:38,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 297 transitions, 3434 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 21:25:38,709 INFO L231 Difference]: Finished difference. Result has 309 places, 279 transitions, 2881 flow [2024-06-21 21:25:38,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2881, PETRI_PLACES=309, PETRI_TRANSITIONS=279} [2024-06-21 21:25:38,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-06-21 21:25:38,709 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 279 transitions, 2881 flow [2024-06-21 21:25:38,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:38,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:38,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:38,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:25:38,710 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:38,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:38,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1034624302, now seen corresponding path program 11 times [2024-06-21 21:25:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:38,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384162577] [2024-06-21 21:25:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:39,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384162577] [2024-06-21 21:25:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384162577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:39,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:39,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308230700] [2024-06-21 21:25:39,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:39,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:39,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:39,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:40,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:40,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 279 transitions, 2881 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:40,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:40,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:40,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:40,451 INFO L124 PetriNetUnfolderBase]: 779/1372 cut-off events. [2024-06-21 21:25:40,451 INFO L125 PetriNetUnfolderBase]: For 159393/159393 co-relation queries the response was YES. [2024-06-21 21:25:40,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9572 conditions, 1372 events. 779/1372 cut-off events. For 159393/159393 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7319 event pairs, 99 based on Foata normal form. 2/1372 useless extension candidates. Maximal degree in co-relation 9432. Up to 1227 conditions per place. [2024-06-21 21:25:40,465 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 244 selfloop transitions, 53 changer transitions 1/300 dead transitions. [2024-06-21 21:25:40,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 300 transitions, 3572 flow [2024-06-21 21:25:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:25:40,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:25:40,466 INFO L175 Difference]: Start difference. First operand has 309 places, 279 transitions, 2881 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:25:40,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 300 transitions, 3572 flow [2024-06-21 21:25:40,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 300 transitions, 3448 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 21:25:40,978 INFO L231 Difference]: Finished difference. Result has 309 places, 282 transitions, 2914 flow [2024-06-21 21:25:40,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2914, PETRI_PLACES=309, PETRI_TRANSITIONS=282} [2024-06-21 21:25:40,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-06-21 21:25:40,979 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 282 transitions, 2914 flow [2024-06-21 21:25:40,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:40,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:40,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:40,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:25:40,980 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:40,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1398842634, now seen corresponding path program 12 times [2024-06-21 21:25:40,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:40,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443312753] [2024-06-21 21:25:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:40,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:42,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:42,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443312753] [2024-06-21 21:25:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443312753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:42,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245383713] [2024-06-21 21:25:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:42,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:42,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 282 transitions, 2914 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:42,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:42,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:42,951 INFO L124 PetriNetUnfolderBase]: 783/1380 cut-off events. [2024-06-21 21:25:42,952 INFO L125 PetriNetUnfolderBase]: For 162818/162818 co-relation queries the response was YES. [2024-06-21 21:25:42,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9659 conditions, 1380 events. 783/1380 cut-off events. For 162818/162818 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 7366 event pairs, 88 based on Foata normal form. 2/1380 useless extension candidates. Maximal degree in co-relation 9518. Up to 1246 conditions per place. [2024-06-21 21:25:42,966 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 249 selfloop transitions, 49 changer transitions 0/300 dead transitions. [2024-06-21 21:25:42,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 300 transitions, 3588 flow [2024-06-21 21:25:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:25:42,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:25:42,967 INFO L175 Difference]: Start difference. First operand has 309 places, 282 transitions, 2914 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:25:42,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 300 transitions, 3588 flow [2024-06-21 21:25:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 300 transitions, 3467 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 21:25:43,412 INFO L231 Difference]: Finished difference. Result has 313 places, 283 transitions, 2929 flow [2024-06-21 21:25:43,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2929, PETRI_PLACES=313, PETRI_TRANSITIONS=283} [2024-06-21 21:25:43,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 21:25:43,413 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 283 transitions, 2929 flow [2024-06-21 21:25:43,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:43,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:43,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:43,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:25:43,413 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:43,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1034620582, now seen corresponding path program 13 times [2024-06-21 21:25:43,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:43,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207728256] [2024-06-21 21:25:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:43,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207728256] [2024-06-21 21:25:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207728256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:44,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15129397] [2024-06-21 21:25:44,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:44,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:44,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:44,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:44,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 283 transitions, 2929 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:44,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:44,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:44,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:45,156 INFO L124 PetriNetUnfolderBase]: 787/1388 cut-off events. [2024-06-21 21:25:45,156 INFO L125 PetriNetUnfolderBase]: For 166065/166065 co-relation queries the response was YES. [2024-06-21 21:25:45,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9724 conditions, 1388 events. 787/1388 cut-off events. For 166065/166065 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 7444 event pairs, 89 based on Foata normal form. 2/1388 useless extension candidates. Maximal degree in co-relation 9582. Up to 1179 conditions per place. [2024-06-21 21:25:45,171 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 243 selfloop transitions, 57 changer transitions 4/306 dead transitions. [2024-06-21 21:25:45,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 306 transitions, 3653 flow [2024-06-21 21:25:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 21:25:45,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 21:25:45,171 INFO L175 Difference]: Start difference. First operand has 313 places, 283 transitions, 2929 flow. Second operand 11 states and 138 transitions. [2024-06-21 21:25:45,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 306 transitions, 3653 flow [2024-06-21 21:25:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 306 transitions, 3511 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 21:25:45,701 INFO L231 Difference]: Finished difference. Result has 314 places, 284 transitions, 2941 flow [2024-06-21 21:25:45,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2941, PETRI_PLACES=314, PETRI_TRANSITIONS=284} [2024-06-21 21:25:45,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 21:25:45,702 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 284 transitions, 2941 flow [2024-06-21 21:25:45,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:45,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:45,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:45,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:25:45,702 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:45,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash 795404608, now seen corresponding path program 14 times [2024-06-21 21:25:45,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:45,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375589777] [2024-06-21 21:25:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:45,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:46,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:46,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375589777] [2024-06-21 21:25:46,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375589777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:46,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:46,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798307012] [2024-06-21 21:25:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:46,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:47,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:47,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 284 transitions, 2941 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:47,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:47,595 INFO L124 PetriNetUnfolderBase]: 807/1432 cut-off events. [2024-06-21 21:25:47,596 INFO L125 PetriNetUnfolderBase]: For 223429/223429 co-relation queries the response was YES. [2024-06-21 21:25:47,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 1432 events. 807/1432 cut-off events. For 223429/223429 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7739 event pairs, 113 based on Foata normal form. 12/1442 useless extension candidates. Maximal degree in co-relation 9812. Up to 1315 conditions per place. [2024-06-21 21:25:47,610 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 273 selfloop transitions, 25 changer transitions 6/306 dead transitions. [2024-06-21 21:25:47,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 306 transitions, 3689 flow [2024-06-21 21:25:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:25:47,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:25:47,611 INFO L175 Difference]: Start difference. First operand has 314 places, 284 transitions, 2941 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:25:47,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 306 transitions, 3689 flow [2024-06-21 21:25:48,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 306 transitions, 3545 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:25:48,146 INFO L231 Difference]: Finished difference. Result has 317 places, 285 transitions, 2896 flow [2024-06-21 21:25:48,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2896, PETRI_PLACES=317, PETRI_TRANSITIONS=285} [2024-06-21 21:25:48,147 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-21 21:25:48,147 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 285 transitions, 2896 flow [2024-06-21 21:25:48,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:48,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:48,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:48,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:25:48,147 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:48,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:48,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1133507783, now seen corresponding path program 6 times [2024-06-21 21:25:48,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:48,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914736714] [2024-06-21 21:25:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:49,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914736714] [2024-06-21 21:25:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914736714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:49,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:49,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:25:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810322858] [2024-06-21 21:25:49,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:49,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:25:49,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:25:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:25:49,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:49,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 285 transitions, 2896 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:49,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:49,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:49,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:49,800 INFO L124 PetriNetUnfolderBase]: 805/1430 cut-off events. [2024-06-21 21:25:49,801 INFO L125 PetriNetUnfolderBase]: For 172521/172521 co-relation queries the response was YES. [2024-06-21 21:25:49,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9857 conditions, 1430 events. 805/1430 cut-off events. For 172521/172521 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 7727 event pairs, 117 based on Foata normal form. 2/1430 useless extension candidates. Maximal degree in co-relation 9712. Up to 1380 conditions per place. [2024-06-21 21:25:49,815 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 278 selfloop transitions, 20 changer transitions 0/300 dead transitions. [2024-06-21 21:25:49,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 300 transitions, 3555 flow [2024-06-21 21:25:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 21:25:49,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 21:25:49,816 INFO L175 Difference]: Start difference. First operand has 317 places, 285 transitions, 2896 flow. Second operand 10 states and 111 transitions. [2024-06-21 21:25:49,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 300 transitions, 3555 flow [2024-06-21 21:25:50,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 300 transitions, 3477 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:25:50,351 INFO L231 Difference]: Finished difference. Result has 320 places, 287 transitions, 2898 flow [2024-06-21 21:25:50,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2898, PETRI_PLACES=320, PETRI_TRANSITIONS=287} [2024-06-21 21:25:50,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 21:25:50,352 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 287 transitions, 2898 flow [2024-06-21 21:25:50,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:50,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:50,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:50,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:25:50,352 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:50,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:50,352 INFO L85 PathProgramCache]: Analyzing trace with hash 550086985, now seen corresponding path program 7 times [2024-06-21 21:25:50,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:50,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448131135] [2024-06-21 21:25:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:50,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:51,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:51,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448131135] [2024-06-21 21:25:51,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448131135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:51,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:51,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:25:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224688237] [2024-06-21 21:25:51,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:51,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:25:51,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:25:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:25:51,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:51,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 287 transitions, 2898 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:51,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:51,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:51,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:51,917 INFO L124 PetriNetUnfolderBase]: 809/1438 cut-off events. [2024-06-21 21:25:51,917 INFO L125 PetriNetUnfolderBase]: For 175094/175094 co-relation queries the response was YES. [2024-06-21 21:25:51,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9885 conditions, 1438 events. 809/1438 cut-off events. For 175094/175094 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 7809 event pairs, 121 based on Foata normal form. 2/1438 useless extension candidates. Maximal degree in co-relation 9738. Up to 1400 conditions per place. [2024-06-21 21:25:51,933 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 283 selfloop transitions, 16 changer transitions 0/301 dead transitions. [2024-06-21 21:25:51,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 301 transitions, 3554 flow [2024-06-21 21:25:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:51,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 21:25:51,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 21:25:51,933 INFO L175 Difference]: Start difference. First operand has 320 places, 287 transitions, 2898 flow. Second operand 10 states and 107 transitions. [2024-06-21 21:25:51,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 301 transitions, 3554 flow [2024-06-21 21:25:52,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 301 transitions, 3505 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 21:25:52,496 INFO L231 Difference]: Finished difference. Result has 324 places, 289 transitions, 2920 flow [2024-06-21 21:25:52,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2920, PETRI_PLACES=324, PETRI_TRANSITIONS=289} [2024-06-21 21:25:52,496 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2024-06-21 21:25:52,497 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 289 transitions, 2920 flow [2024-06-21 21:25:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:52,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:52,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:25:52,497 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:52,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1340582234, now seen corresponding path program 15 times [2024-06-21 21:25:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61939051] [2024-06-21 21:25:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:53,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61939051] [2024-06-21 21:25:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61939051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:53,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:53,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:25:53,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216415404] [2024-06-21 21:25:53,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:53,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:25:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:25:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:25:53,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:53,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 289 transitions, 2920 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:53,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:53,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:53,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:54,010 INFO L124 PetriNetUnfolderBase]: 849/1518 cut-off events. [2024-06-21 21:25:54,010 INFO L125 PetriNetUnfolderBase]: For 248305/248305 co-relation queries the response was YES. [2024-06-21 21:25:54,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11645 conditions, 1518 events. 849/1518 cut-off events. For 248305/248305 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 8296 event pairs, 123 based on Foata normal form. 2/1518 useless extension candidates. Maximal degree in co-relation 11496. Up to 1243 conditions per place. [2024-06-21 21:25:54,025 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 262 selfloop transitions, 46 changer transitions 0/310 dead transitions. [2024-06-21 21:25:54,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 310 transitions, 3910 flow [2024-06-21 21:25:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:25:54,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:25:54,026 INFO L175 Difference]: Start difference. First operand has 324 places, 289 transitions, 2920 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:25:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 310 transitions, 3910 flow [2024-06-21 21:25:54,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 310 transitions, 3866 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:25:54,783 INFO L231 Difference]: Finished difference. Result has 327 places, 290 transitions, 3010 flow [2024-06-21 21:25:54,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3010, PETRI_PLACES=327, PETRI_TRANSITIONS=290} [2024-06-21 21:25:54,783 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2024-06-21 21:25:54,783 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 290 transitions, 3010 flow [2024-06-21 21:25:54,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:25:54,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:54,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:54,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:25:54,784 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:54,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:54,784 INFO L85 PathProgramCache]: Analyzing trace with hash 550355755, now seen corresponding path program 8 times [2024-06-21 21:25:54,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:54,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880057572] [2024-06-21 21:25:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:55,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880057572] [2024-06-21 21:25:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880057572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:55,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860986721] [2024-06-21 21:25:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:56,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:56,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 290 transitions, 3010 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:56,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:56,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:56,513 INFO L124 PetriNetUnfolderBase]: 853/1526 cut-off events. [2024-06-21 21:25:56,513 INFO L125 PetriNetUnfolderBase]: For 251176/251176 co-relation queries the response was YES. [2024-06-21 21:25:56,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11796 conditions, 1526 events. 853/1526 cut-off events. For 251176/251176 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8384 event pairs, 147 based on Foata normal form. 2/1526 useless extension candidates. Maximal degree in co-relation 11646. Up to 1474 conditions per place. [2024-06-21 21:25:56,529 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 285 selfloop transitions, 18 changer transitions 0/305 dead transitions. [2024-06-21 21:25:56,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 305 transitions, 3670 flow [2024-06-21 21:25:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:25:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:25:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 21:25:56,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 21:25:56,530 INFO L175 Difference]: Start difference. First operand has 327 places, 290 transitions, 3010 flow. Second operand 11 states and 117 transitions. [2024-06-21 21:25:56,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 305 transitions, 3670 flow [2024-06-21 21:25:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 305 transitions, 3457 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 21:25:57,392 INFO L231 Difference]: Finished difference. Result has 328 places, 291 transitions, 2859 flow [2024-06-21 21:25:57,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2859, PETRI_PLACES=328, PETRI_TRANSITIONS=291} [2024-06-21 21:25:57,393 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 298 predicate places. [2024-06-21 21:25:57,393 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 291 transitions, 2859 flow [2024-06-21 21:25:57,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:57,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:57,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:25:57,393 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:57,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 792535595, now seen corresponding path program 9 times [2024-06-21 21:25:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501779141] [2024-06-21 21:25:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:25:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:25:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:25:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501779141] [2024-06-21 21:25:58,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501779141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:25:58,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:25:58,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:25:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548749010] [2024-06-21 21:25:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:25:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:25:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:25:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:25:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:25:58,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:25:58,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 291 transitions, 2859 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:58,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:25:58,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:25:58,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:25:58,993 INFO L124 PetriNetUnfolderBase]: 857/1534 cut-off events. [2024-06-21 21:25:58,993 INFO L125 PetriNetUnfolderBase]: For 256743/256743 co-relation queries the response was YES. [2024-06-21 21:25:59,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11565 conditions, 1534 events. 857/1534 cut-off events. For 256743/256743 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8433 event pairs, 145 based on Foata normal form. 2/1534 useless extension candidates. Maximal degree in co-relation 11417. Up to 1484 conditions per place. [2024-06-21 21:25:59,010 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 284 selfloop transitions, 19 changer transitions 0/305 dead transitions. [2024-06-21 21:25:59,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 305 transitions, 3519 flow [2024-06-21 21:25:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:25:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:25:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:25:59,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:25:59,011 INFO L175 Difference]: Start difference. First operand has 328 places, 291 transitions, 2859 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:25:59,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 305 transitions, 3519 flow [2024-06-21 21:25:59,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 305 transitions, 3467 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:25:59,853 INFO L231 Difference]: Finished difference. Result has 329 places, 292 transitions, 2873 flow [2024-06-21 21:25:59,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2873, PETRI_PLACES=329, PETRI_TRANSITIONS=292} [2024-06-21 21:25:59,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2024-06-21 21:25:59,853 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 292 transitions, 2873 flow [2024-06-21 21:25:59,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:25:59,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:25:59,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:25:59,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:25:59,854 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:25:59,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:25:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1123258253, now seen corresponding path program 10 times [2024-06-21 21:25:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:25:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323262843] [2024-06-21 21:25:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:25:59,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:25:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:00,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323262843] [2024-06-21 21:26:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323262843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:00,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424962244] [2024-06-21 21:26:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:00,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:00,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:00,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 292 transitions, 2873 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:00,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:00,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:00,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:01,345 INFO L124 PetriNetUnfolderBase]: 861/1542 cut-off events. [2024-06-21 21:26:01,345 INFO L125 PetriNetUnfolderBase]: For 259747/259747 co-relation queries the response was YES. [2024-06-21 21:26:01,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11644 conditions, 1542 events. 861/1542 cut-off events. For 259747/259747 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8504 event pairs, 151 based on Foata normal form. 2/1542 useless extension candidates. Maximal degree in co-relation 11495. Up to 1499 conditions per place. [2024-06-21 21:26:01,362 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 288 selfloop transitions, 15 changer transitions 0/305 dead transitions. [2024-06-21 21:26:01,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 305 transitions, 3529 flow [2024-06-21 21:26:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 21:26:01,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 21:26:01,363 INFO L175 Difference]: Start difference. First operand has 329 places, 292 transitions, 2873 flow. Second operand 10 states and 105 transitions. [2024-06-21 21:26:01,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 305 transitions, 3529 flow [2024-06-21 21:26:02,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 305 transitions, 3473 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:02,225 INFO L231 Difference]: Finished difference. Result has 331 places, 293 transitions, 2877 flow [2024-06-21 21:26:02,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2877, PETRI_PLACES=331, PETRI_TRANSITIONS=293} [2024-06-21 21:26:02,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2024-06-21 21:26:02,225 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 293 transitions, 2877 flow [2024-06-21 21:26:02,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:02,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:02,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:26:02,225 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:02,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1140917093, now seen corresponding path program 11 times [2024-06-21 21:26:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197607953] [2024-06-21 21:26:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:03,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197607953] [2024-06-21 21:26:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197607953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:03,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:03,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:03,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892088172] [2024-06-21 21:26:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:03,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:03,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:03,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:03,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 293 transitions, 2877 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:03,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:03,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:03,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:04,024 INFO L124 PetriNetUnfolderBase]: 865/1550 cut-off events. [2024-06-21 21:26:04,024 INFO L125 PetriNetUnfolderBase]: For 264703/264703 co-relation queries the response was YES. [2024-06-21 21:26:04,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11713 conditions, 1550 events. 865/1550 cut-off events. For 264703/264703 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 8590 event pairs, 147 based on Foata normal form. 2/1550 useless extension candidates. Maximal degree in co-relation 11563. Up to 1491 conditions per place. [2024-06-21 21:26:04,040 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 283 selfloop transitions, 23 changer transitions 0/308 dead transitions. [2024-06-21 21:26:04,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 308 transitions, 3553 flow [2024-06-21 21:26:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 21:26:04,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 21:26:04,041 INFO L175 Difference]: Start difference. First operand has 331 places, 293 transitions, 2877 flow. Second operand 10 states and 114 transitions. [2024-06-21 21:26:04,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 308 transitions, 3553 flow [2024-06-21 21:26:05,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 308 transitions, 3503 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:05,036 INFO L231 Difference]: Finished difference. Result has 333 places, 294 transitions, 2905 flow [2024-06-21 21:26:05,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2905, PETRI_PLACES=333, PETRI_TRANSITIONS=294} [2024-06-21 21:26:05,036 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2024-06-21 21:26:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 294 transitions, 2905 flow [2024-06-21 21:26:05,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:05,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:05,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:26:05,036 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:05,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:05,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1141126839, now seen corresponding path program 10 times [2024-06-21 21:26:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:05,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954570727] [2024-06-21 21:26:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:05,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954570727] [2024-06-21 21:26:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954570727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:06,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175961843] [2024-06-21 21:26:06,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:06,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:06,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 294 transitions, 2905 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:06,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:06,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:06,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:07,084 INFO L124 PetriNetUnfolderBase]: 871/1560 cut-off events. [2024-06-21 21:26:07,085 INFO L125 PetriNetUnfolderBase]: For 271311/271311 co-relation queries the response was YES. [2024-06-21 21:26:07,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11812 conditions, 1560 events. 871/1560 cut-off events. For 271311/271311 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8686 event pairs, 139 based on Foata normal form. 2/1560 useless extension candidates. Maximal degree in co-relation 11661. Up to 1474 conditions per place. [2024-06-21 21:26:07,102 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 280 selfloop transitions, 30 changer transitions 0/312 dead transitions. [2024-06-21 21:26:07,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 312 transitions, 3611 flow [2024-06-21 21:26:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:26:07,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:26:07,103 INFO L175 Difference]: Start difference. First operand has 333 places, 294 transitions, 2905 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:26:07,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 312 transitions, 3611 flow [2024-06-21 21:26:07,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 312 transitions, 3543 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:07,999 INFO L231 Difference]: Finished difference. Result has 336 places, 296 transitions, 2946 flow [2024-06-21 21:26:07,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2946, PETRI_PLACES=336, PETRI_TRANSITIONS=296} [2024-06-21 21:26:08,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2024-06-21 21:26:08,000 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 296 transitions, 2946 flow [2024-06-21 21:26:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:08,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:08,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:26:08,000 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:08,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 542937145, now seen corresponding path program 12 times [2024-06-21 21:26:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098293491] [2024-06-21 21:26:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:09,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098293491] [2024-06-21 21:26:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098293491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:09,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:09,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:09,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005875430] [2024-06-21 21:26:09,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:09,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:09,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:09,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:09,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:09,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:09,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 296 transitions, 2946 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:09,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:09,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:09,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:10,111 INFO L124 PetriNetUnfolderBase]: 875/1568 cut-off events. [2024-06-21 21:26:10,111 INFO L125 PetriNetUnfolderBase]: For 274291/274291 co-relation queries the response was YES. [2024-06-21 21:26:10,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11912 conditions, 1568 events. 875/1568 cut-off events. For 274291/274291 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8734 event pairs, 151 based on Foata normal form. 2/1568 useless extension candidates. Maximal degree in co-relation 11760. Up to 1521 conditions per place. [2024-06-21 21:26:10,128 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 289 selfloop transitions, 19 changer transitions 0/310 dead transitions. [2024-06-21 21:26:10,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 310 transitions, 3624 flow [2024-06-21 21:26:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:26:10,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:26:10,129 INFO L175 Difference]: Start difference. First operand has 336 places, 296 transitions, 2946 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:26:10,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 310 transitions, 3624 flow [2024-06-21 21:26:10,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 310 transitions, 3542 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:10,952 INFO L231 Difference]: Finished difference. Result has 338 places, 297 transitions, 2936 flow [2024-06-21 21:26:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2936, PETRI_PLACES=338, PETRI_TRANSITIONS=297} [2024-06-21 21:26:10,952 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2024-06-21 21:26:10,953 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 297 transitions, 2936 flow [2024-06-21 21:26:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:10,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:10,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:26:10,953 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:10,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 585455564, now seen corresponding path program 16 times [2024-06-21 21:26:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:10,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336181441] [2024-06-21 21:26:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:11,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:11,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336181441] [2024-06-21 21:26:11,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336181441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:11,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:11,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560988235] [2024-06-21 21:26:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:12,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:12,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 297 transitions, 2936 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:12,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:12,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:12,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:12,694 INFO L124 PetriNetUnfolderBase]: 879/1576 cut-off events. [2024-06-21 21:26:12,694 INFO L125 PetriNetUnfolderBase]: For 281143/281143 co-relation queries the response was YES. [2024-06-21 21:26:12,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11973 conditions, 1576 events. 879/1576 cut-off events. For 281143/281143 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 8801 event pairs, 139 based on Foata normal form. 2/1576 useless extension candidates. Maximal degree in co-relation 11820. Up to 1442 conditions per place. [2024-06-21 21:26:12,712 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 262 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-21 21:26:12,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 314 transitions, 3635 flow [2024-06-21 21:26:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:26:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:26:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 21:26:12,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:26:12,713 INFO L175 Difference]: Start difference. First operand has 338 places, 297 transitions, 2936 flow. Second operand 12 states and 136 transitions. [2024-06-21 21:26:12,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 314 transitions, 3635 flow [2024-06-21 21:26:13,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 314 transitions, 3573 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:13,599 INFO L231 Difference]: Finished difference. Result has 342 places, 298 transitions, 3013 flow [2024-06-21 21:26:13,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3013, PETRI_PLACES=342, PETRI_TRANSITIONS=298} [2024-06-21 21:26:13,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2024-06-21 21:26:13,599 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 298 transitions, 3013 flow [2024-06-21 21:26:13,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:13,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:13,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:13,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:26:13,600 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:13,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:13,600 INFO L85 PathProgramCache]: Analyzing trace with hash 542929209, now seen corresponding path program 11 times [2024-06-21 21:26:13,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:13,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333160874] [2024-06-21 21:26:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:13,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:14,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:14,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333160874] [2024-06-21 21:26:14,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333160874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:14,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:14,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120766217] [2024-06-21 21:26:14,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:14,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:15,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 298 transitions, 3013 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:15,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:15,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:15,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:15,801 INFO L124 PetriNetUnfolderBase]: 885/1586 cut-off events. [2024-06-21 21:26:15,801 INFO L125 PetriNetUnfolderBase]: For 284147/284147 co-relation queries the response was YES. [2024-06-21 21:26:15,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12122 conditions, 1586 events. 885/1586 cut-off events. For 284147/284147 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 8865 event pairs, 144 based on Foata normal form. 2/1586 useless extension candidates. Maximal degree in co-relation 11968. Up to 1484 conditions per place. [2024-06-21 21:26:15,817 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 283 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-21 21:26:15,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 316 transitions, 3957 flow [2024-06-21 21:26:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:26:15,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:26:15,818 INFO L175 Difference]: Start difference. First operand has 342 places, 298 transitions, 3013 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:26:15,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 316 transitions, 3957 flow [2024-06-21 21:26:16,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 316 transitions, 3808 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:16,755 INFO L231 Difference]: Finished difference. Result has 345 places, 300 transitions, 2971 flow [2024-06-21 21:26:16,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2971, PETRI_PLACES=345, PETRI_TRANSITIONS=300} [2024-06-21 21:26:16,755 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2024-06-21 21:26:16,755 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 300 transitions, 2971 flow [2024-06-21 21:26:16,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:16,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:16,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:16,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:26:16,756 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:16,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1140925029, now seen corresponding path program 12 times [2024-06-21 21:26:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:16,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091892075] [2024-06-21 21:26:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:16,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:18,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:18,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091892075] [2024-06-21 21:26:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091892075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:18,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:18,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664578403] [2024-06-21 21:26:18,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:18,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:18,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:18,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 300 transitions, 2971 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:18,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:18,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:18,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:18,808 INFO L124 PetriNetUnfolderBase]: 881/1580 cut-off events. [2024-06-21 21:26:18,808 INFO L125 PetriNetUnfolderBase]: For 276421/276421 co-relation queries the response was YES. [2024-06-21 21:26:18,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11783 conditions, 1580 events. 881/1580 cut-off events. For 276421/276421 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 8868 event pairs, 140 based on Foata normal form. 2/1580 useless extension candidates. Maximal degree in co-relation 11628. Up to 1469 conditions per place. [2024-06-21 21:26:18,825 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 280 selfloop transitions, 34 changer transitions 0/316 dead transitions. [2024-06-21 21:26:18,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 316 transitions, 3645 flow [2024-06-21 21:26:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 21:26:18,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 21:26:18,827 INFO L175 Difference]: Start difference. First operand has 345 places, 300 transitions, 2971 flow. Second operand 11 states and 129 transitions. [2024-06-21 21:26:18,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 316 transitions, 3645 flow [2024-06-21 21:26:19,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 316 transitions, 3535 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:19,776 INFO L231 Difference]: Finished difference. Result has 347 places, 300 transitions, 2934 flow [2024-06-21 21:26:19,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2934, PETRI_PLACES=347, PETRI_TRANSITIONS=300} [2024-06-21 21:26:19,777 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-21 21:26:19,777 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 300 transitions, 2934 flow [2024-06-21 21:26:19,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:19,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:19,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:19,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:26:19,777 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:19,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 542721664, now seen corresponding path program 17 times [2024-06-21 21:26:19,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:19,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954137181] [2024-06-21 21:26:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:19,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954137181] [2024-06-21 21:26:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954137181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:20,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68949106] [2024-06-21 21:26:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:20,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:20,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:20,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:20,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 300 transitions, 2934 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:20,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:20,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:20,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:21,470 INFO L124 PetriNetUnfolderBase]: 891/1606 cut-off events. [2024-06-21 21:26:21,470 INFO L125 PetriNetUnfolderBase]: For 334218/334218 co-relation queries the response was YES. [2024-06-21 21:26:21,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11481 conditions, 1606 events. 891/1606 cut-off events. For 334218/334218 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9058 event pairs, 148 based on Foata normal form. 14/1618 useless extension candidates. Maximal degree in co-relation 11325. Up to 1491 conditions per place. [2024-06-21 21:26:21,488 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 289 selfloop transitions, 19 changer transitions 9/319 dead transitions. [2024-06-21 21:26:21,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 319 transitions, 3719 flow [2024-06-21 21:26:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 21:26:21,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 21:26:21,489 INFO L175 Difference]: Start difference. First operand has 347 places, 300 transitions, 2934 flow. Second operand 10 states and 117 transitions. [2024-06-21 21:26:21,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 319 transitions, 3719 flow [2024-06-21 21:26:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 319 transitions, 3615 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:26:22,488 INFO L231 Difference]: Finished difference. Result has 346 places, 298 transitions, 2868 flow [2024-06-21 21:26:22,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2868, PETRI_PLACES=346, PETRI_TRANSITIONS=298} [2024-06-21 21:26:22,488 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-21 21:26:22,489 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 298 transitions, 2868 flow [2024-06-21 21:26:22,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:22,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:22,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:26:22,489 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:22,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:22,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1340428629, now seen corresponding path program 13 times [2024-06-21 21:26:22,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:22,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122396308] [2024-06-21 21:26:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:23,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:23,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122396308] [2024-06-21 21:26:23,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122396308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:23,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:23,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:23,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202654419] [2024-06-21 21:26:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:23,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:23,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:23,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:23,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 298 transitions, 2868 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:23,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:23,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:23,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:24,481 INFO L124 PetriNetUnfolderBase]: 851/1532 cut-off events. [2024-06-21 21:26:24,482 INFO L125 PetriNetUnfolderBase]: For 241641/241641 co-relation queries the response was YES. [2024-06-21 21:26:24,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10780 conditions, 1532 events. 851/1532 cut-off events. For 241641/241641 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 8580 event pairs, 119 based on Foata normal form. 2/1532 useless extension candidates. Maximal degree in co-relation 10623. Up to 1371 conditions per place. [2024-06-21 21:26:24,497 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 259 selfloop transitions, 52 changer transitions 0/313 dead transitions. [2024-06-21 21:26:24,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 313 transitions, 3532 flow [2024-06-21 21:26:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:26:24,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:26:24,498 INFO L175 Difference]: Start difference. First operand has 346 places, 298 transitions, 2868 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:26:24,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 313 transitions, 3532 flow [2024-06-21 21:26:25,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 313 transitions, 3440 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:25,247 INFO L231 Difference]: Finished difference. Result has 349 places, 298 transitions, 2885 flow [2024-06-21 21:26:25,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2885, PETRI_PLACES=349, PETRI_TRANSITIONS=298} [2024-06-21 21:26:25,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2024-06-21 21:26:25,248 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 298 transitions, 2885 flow [2024-06-21 21:26:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:25,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:25,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:26:25,248 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:25,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1335066249, now seen corresponding path program 14 times [2024-06-21 21:26:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634773479] [2024-06-21 21:26:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:26,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634773479] [2024-06-21 21:26:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634773479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:26,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:26,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088201549] [2024-06-21 21:26:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:26,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:26,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:26,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:26,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 298 transitions, 2885 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:26,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:26,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:26,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:27,232 INFO L124 PetriNetUnfolderBase]: 857/1542 cut-off events. [2024-06-21 21:26:27,232 INFO L125 PetriNetUnfolderBase]: For 245361/245361 co-relation queries the response was YES. [2024-06-21 21:26:27,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 1542 events. 857/1542 cut-off events. For 245361/245361 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8666 event pairs, 123 based on Foata normal form. 2/1542 useless extension candidates. Maximal degree in co-relation 10727. Up to 1381 conditions per place. [2024-06-21 21:26:27,249 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 267 selfloop transitions, 47 changer transitions 0/316 dead transitions. [2024-06-21 21:26:27,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 316 transitions, 3597 flow [2024-06-21 21:26:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 21:26:27,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 21:26:27,250 INFO L175 Difference]: Start difference. First operand has 349 places, 298 transitions, 2885 flow. Second operand 11 states and 129 transitions. [2024-06-21 21:26:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 316 transitions, 3597 flow [2024-06-21 21:26:28,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 316 transitions, 3505 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:28,060 INFO L231 Difference]: Finished difference. Result has 351 places, 300 transitions, 2934 flow [2024-06-21 21:26:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2934, PETRI_PLACES=351, PETRI_TRANSITIONS=300} [2024-06-21 21:26:28,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2024-06-21 21:26:28,061 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 300 transitions, 2934 flow [2024-06-21 21:26:28,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:26:28,061 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:28,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1335071829, now seen corresponding path program 15 times [2024-06-21 21:26:28,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:28,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326880848] [2024-06-21 21:26:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:29,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:29,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326880848] [2024-06-21 21:26:29,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326880848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:29,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:29,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:29,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556258990] [2024-06-21 21:26:29,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:29,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:29,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:29,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:29,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:29,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 300 transitions, 2934 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:29,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:29,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:29,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:29,951 INFO L124 PetriNetUnfolderBase]: 853/1536 cut-off events. [2024-06-21 21:26:29,951 INFO L125 PetriNetUnfolderBase]: For 234870/234870 co-relation queries the response was YES. [2024-06-21 21:26:29,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10650 conditions, 1536 events. 853/1536 cut-off events. For 234870/234870 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8636 event pairs, 121 based on Foata normal form. 2/1536 useless extension candidates. Maximal degree in co-relation 10491. Up to 1355 conditions per place. [2024-06-21 21:26:29,965 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 264 selfloop transitions, 53 changer transitions 0/319 dead transitions. [2024-06-21 21:26:29,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 319 transitions, 3864 flow [2024-06-21 21:26:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:26:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:26:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:26:29,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:26:29,965 INFO L175 Difference]: Start difference. First operand has 351 places, 300 transitions, 2934 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:26:29,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 319 transitions, 3864 flow [2024-06-21 21:26:30,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 319 transitions, 3721 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:30,767 INFO L231 Difference]: Finished difference. Result has 354 places, 300 transitions, 2902 flow [2024-06-21 21:26:30,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2902, PETRI_PLACES=354, PETRI_TRANSITIONS=300} [2024-06-21 21:26:30,767 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 324 predicate places. [2024-06-21 21:26:30,767 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 300 transitions, 2902 flow [2024-06-21 21:26:30,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:30,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:30,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:30,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:26:30,767 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:30,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:30,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1335071984, now seen corresponding path program 18 times [2024-06-21 21:26:30,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:30,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431818607] [2024-06-21 21:26:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:30,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431818607] [2024-06-21 21:26:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431818607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:32,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667342850] [2024-06-21 21:26:32,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:32,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:32,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 300 transitions, 2902 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:32,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:32,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:32,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:32,693 INFO L124 PetriNetUnfolderBase]: 850/1531 cut-off events. [2024-06-21 21:26:32,693 INFO L125 PetriNetUnfolderBase]: For 223223/223223 co-relation queries the response was YES. [2024-06-21 21:26:32,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10348 conditions, 1531 events. 850/1531 cut-off events. For 223223/223223 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8576 event pairs, 137 based on Foata normal form. 2/1531 useless extension candidates. Maximal degree in co-relation 10188. Up to 1435 conditions per place. [2024-06-21 21:26:32,709 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 275 selfloop transitions, 36 changer transitions 0/313 dead transitions. [2024-06-21 21:26:32,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 313 transitions, 3556 flow [2024-06-21 21:26:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:32,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:26:32,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:26:32,710 INFO L175 Difference]: Start difference. First operand has 354 places, 300 transitions, 2902 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:26:32,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 313 transitions, 3556 flow [2024-06-21 21:26:33,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 313 transitions, 3385 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:26:33,553 INFO L231 Difference]: Finished difference. Result has 353 places, 300 transitions, 2807 flow [2024-06-21 21:26:33,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2807, PETRI_PLACES=353, PETRI_TRANSITIONS=300} [2024-06-21 21:26:33,554 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2024-06-21 21:26:33,554 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 300 transitions, 2807 flow [2024-06-21 21:26:33,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:33,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:33,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:33,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:26:33,554 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:33,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 591177575, now seen corresponding path program 13 times [2024-06-21 21:26:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:33,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886230299] [2024-06-21 21:26:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:33,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886230299] [2024-06-21 21:26:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886230299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:34,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:34,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:34,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675168134] [2024-06-21 21:26:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:34,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:34,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 300 transitions, 2807 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:34,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:34,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:34,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:35,351 INFO L124 PetriNetUnfolderBase]: 854/1539 cut-off events. [2024-06-21 21:26:35,351 INFO L125 PetriNetUnfolderBase]: For 226796/226796 co-relation queries the response was YES. [2024-06-21 21:26:35,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10351 conditions, 1539 events. 854/1539 cut-off events. For 226796/226796 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8624 event pairs, 135 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 10190. Up to 1451 conditions per place. [2024-06-21 21:26:35,368 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 281 selfloop transitions, 31 changer transitions 0/314 dead transitions. [2024-06-21 21:26:35,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 314 transitions, 3495 flow [2024-06-21 21:26:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 21:26:35,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 21:26:35,369 INFO L175 Difference]: Start difference. First operand has 353 places, 300 transitions, 2807 flow. Second operand 10 states and 113 transitions. [2024-06-21 21:26:35,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 314 transitions, 3495 flow [2024-06-21 21:26:36,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 314 transitions, 3393 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:36,201 INFO L231 Difference]: Finished difference. Result has 354 places, 301 transitions, 2803 flow [2024-06-21 21:26:36,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2803, PETRI_PLACES=354, PETRI_TRANSITIONS=301} [2024-06-21 21:26:36,201 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 324 predicate places. [2024-06-21 21:26:36,201 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 301 transitions, 2803 flow [2024-06-21 21:26:36,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:36,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:36,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:36,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:26:36,202 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:36,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1334864439, now seen corresponding path program 16 times [2024-06-21 21:26:36,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:36,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802496794] [2024-06-21 21:26:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:37,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:37,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802496794] [2024-06-21 21:26:37,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802496794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:37,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:37,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361465854] [2024-06-21 21:26:37,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:37,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:37,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:37,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:37,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 301 transitions, 2803 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:37,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:37,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:37,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:38,241 INFO L124 PetriNetUnfolderBase]: 828/1487 cut-off events. [2024-06-21 21:26:38,242 INFO L125 PetriNetUnfolderBase]: For 156140/156140 co-relation queries the response was YES. [2024-06-21 21:26:38,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 1487 events. 828/1487 cut-off events. For 156140/156140 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8351 event pairs, 106 based on Foata normal form. 2/1487 useless extension candidates. Maximal degree in co-relation 8636. Up to 1326 conditions per place. [2024-06-21 21:26:38,257 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 266 selfloop transitions, 48 changer transitions 0/316 dead transitions. [2024-06-21 21:26:38,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 316 transitions, 3473 flow [2024-06-21 21:26:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 21:26:38,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 21:26:38,259 INFO L175 Difference]: Start difference. First operand has 354 places, 301 transitions, 2803 flow. Second operand 11 states and 127 transitions. [2024-06-21 21:26:38,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 316 transitions, 3473 flow [2024-06-21 21:26:38,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 316 transitions, 3327 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:38,885 INFO L231 Difference]: Finished difference. Result has 356 places, 301 transitions, 2758 flow [2024-06-21 21:26:38,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2758, PETRI_PLACES=356, PETRI_TRANSITIONS=301} [2024-06-21 21:26:38,886 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2024-06-21 21:26:38,886 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 301 transitions, 2758 flow [2024-06-21 21:26:38,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:38,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:38,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:38,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:26:38,886 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:38,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1700818431, now seen corresponding path program 14 times [2024-06-21 21:26:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:38,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900296885] [2024-06-21 21:26:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:39,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900296885] [2024-06-21 21:26:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900296885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:39,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:39,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:39,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249909250] [2024-06-21 21:26:39,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:39,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:39,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:39,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:40,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:40,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 301 transitions, 2758 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:40,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:40,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:40,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:40,562 INFO L124 PetriNetUnfolderBase]: 832/1495 cut-off events. [2024-06-21 21:26:40,562 INFO L125 PetriNetUnfolderBase]: For 158417/158417 co-relation queries the response was YES. [2024-06-21 21:26:40,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8764 conditions, 1495 events. 832/1495 cut-off events. For 158417/158417 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8390 event pairs, 126 based on Foata normal form. 2/1495 useless extension candidates. Maximal degree in co-relation 8602. Up to 1449 conditions per place. [2024-06-21 21:26:40,577 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 294 selfloop transitions, 18 changer transitions 0/314 dead transitions. [2024-06-21 21:26:40,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 314 transitions, 3442 flow [2024-06-21 21:26:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:40,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 21:26:40,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 21:26:40,579 INFO L175 Difference]: Start difference. First operand has 356 places, 301 transitions, 2758 flow. Second operand 10 states and 107 transitions. [2024-06-21 21:26:40,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 314 transitions, 3442 flow [2024-06-21 21:26:41,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 314 transitions, 3334 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:26:41,276 INFO L231 Difference]: Finished difference. Result has 356 places, 302 transitions, 2724 flow [2024-06-21 21:26:41,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2724, PETRI_PLACES=356, PETRI_TRANSITIONS=302} [2024-06-21 21:26:41,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2024-06-21 21:26:41,277 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 302 transitions, 2724 flow [2024-06-21 21:26:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:41,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:41,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:41,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:26:41,277 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:41,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:41,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1561488085, now seen corresponding path program 15 times [2024-06-21 21:26:41,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:41,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875376703] [2024-06-21 21:26:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:42,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875376703] [2024-06-21 21:26:42,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875376703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:42,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:42,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:42,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831077845] [2024-06-21 21:26:42,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:42,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:42,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:42,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:42,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 302 transitions, 2724 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:42,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:42,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:42,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:42,897 INFO L124 PetriNetUnfolderBase]: 829/1490 cut-off events. [2024-06-21 21:26:42,897 INFO L125 PetriNetUnfolderBase]: For 144980/144980 co-relation queries the response was YES. [2024-06-21 21:26:42,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8403 conditions, 1490 events. 829/1490 cut-off events. For 144980/144980 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8393 event pairs, 125 based on Foata normal form. 2/1490 useless extension candidates. Maximal degree in co-relation 8240. Up to 1441 conditions per place. [2024-06-21 21:26:42,910 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 292 selfloop transitions, 20 changer transitions 0/314 dead transitions. [2024-06-21 21:26:42,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 314 transitions, 3378 flow [2024-06-21 21:26:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:26:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:26:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 21:26:42,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 21:26:42,911 INFO L175 Difference]: Start difference. First operand has 356 places, 302 transitions, 2724 flow. Second operand 10 states and 108 transitions. [2024-06-21 21:26:42,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 314 transitions, 3378 flow [2024-06-21 21:26:43,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 314 transitions, 3314 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:26:43,510 INFO L231 Difference]: Finished difference. Result has 358 places, 302 transitions, 2705 flow [2024-06-21 21:26:43,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2705, PETRI_PLACES=358, PETRI_TRANSITIONS=302} [2024-06-21 21:26:43,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2024-06-21 21:26:43,510 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 302 transitions, 2705 flow [2024-06-21 21:26:43,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:43,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:43,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:43,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:26:43,511 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:43,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1434902105, now seen corresponding path program 17 times [2024-06-21 21:26:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:43,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335720121] [2024-06-21 21:26:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335720121] [2024-06-21 21:26:45,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335720121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:45,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:45,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079352774] [2024-06-21 21:26:45,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:45,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:45,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 302 transitions, 2705 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:45,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:45,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:45,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:45,796 INFO L124 PetriNetUnfolderBase]: 825/1484 cut-off events. [2024-06-21 21:26:45,796 INFO L125 PetriNetUnfolderBase]: For 130707/130707 co-relation queries the response was YES. [2024-06-21 21:26:45,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8084 conditions, 1484 events. 825/1484 cut-off events. For 130707/130707 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8348 event pairs, 120 based on Foata normal form. 2/1484 useless extension candidates. Maximal degree in co-relation 7920. Up to 1418 conditions per place. [2024-06-21 21:26:45,812 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 291 selfloop transitions, 24 changer transitions 0/317 dead transitions. [2024-06-21 21:26:45,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 317 transitions, 3377 flow [2024-06-21 21:26:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:26:45,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:26:45,813 INFO L175 Difference]: Start difference. First operand has 358 places, 302 transitions, 2705 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:26:45,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 317 transitions, 3377 flow [2024-06-21 21:26:46,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 317 transitions, 3233 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:46,377 INFO L231 Difference]: Finished difference. Result has 360 places, 302 transitions, 2614 flow [2024-06-21 21:26:46,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2614, PETRI_PLACES=360, PETRI_TRANSITIONS=302} [2024-06-21 21:26:46,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 330 predicate places. [2024-06-21 21:26:46,378 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 302 transitions, 2614 flow [2024-06-21 21:26:46,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:46,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:46,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:46,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:26:46,378 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:46,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash 798240427, now seen corresponding path program 18 times [2024-06-21 21:26:46,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:46,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867972156] [2024-06-21 21:26:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:46,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:47,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867972156] [2024-06-21 21:26:47,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867972156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:47,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:47,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605010029] [2024-06-21 21:26:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:47,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:47,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:47,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 302 transitions, 2614 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:47,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:47,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:47,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:48,200 INFO L124 PetriNetUnfolderBase]: 821/1478 cut-off events. [2024-06-21 21:26:48,200 INFO L125 PetriNetUnfolderBase]: For 115768/115768 co-relation queries the response was YES. [2024-06-21 21:26:48,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7671 conditions, 1478 events. 821/1478 cut-off events. For 115768/115768 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8311 event pairs, 124 based on Foata normal form. 2/1478 useless extension candidates. Maximal degree in co-relation 7506. Up to 1416 conditions per place. [2024-06-21 21:26:48,216 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 291 selfloop transitions, 25 changer transitions 0/318 dead transitions. [2024-06-21 21:26:48,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 318 transitions, 3322 flow [2024-06-21 21:26:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:48,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 21:26:48,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 21:26:48,217 INFO L175 Difference]: Start difference. First operand has 360 places, 302 transitions, 2614 flow. Second operand 11 states and 119 transitions. [2024-06-21 21:26:48,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 318 transitions, 3322 flow [2024-06-21 21:26:48,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 318 transitions, 3094 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-06-21 21:26:48,676 INFO L231 Difference]: Finished difference. Result has 356 places, 304 transitions, 2484 flow [2024-06-21 21:26:48,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2484, PETRI_PLACES=356, PETRI_TRANSITIONS=304} [2024-06-21 21:26:48,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2024-06-21 21:26:48,676 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 304 transitions, 2484 flow [2024-06-21 21:26:48,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:26:48,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:48,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:48,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:26:48,677 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:48,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash -128153116, now seen corresponding path program 1 times [2024-06-21 21:26:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677002569] [2024-06-21 21:26:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:48,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:50,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:50,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677002569] [2024-06-21 21:26:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677002569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:50,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:50,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:26:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321007759] [2024-06-21 21:26:50,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:26:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:26:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:26:50,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:50,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 304 transitions, 2484 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:26:50,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:50,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:50,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:50,787 INFO L124 PetriNetUnfolderBase]: 869/1578 cut-off events. [2024-06-21 21:26:50,787 INFO L125 PetriNetUnfolderBase]: For 263934/263934 co-relation queries the response was YES. [2024-06-21 21:26:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9421 conditions, 1578 events. 869/1578 cut-off events. For 263934/263934 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 9003 event pairs, 140 based on Foata normal form. 8/1584 useless extension candidates. Maximal degree in co-relation 9259. Up to 1278 conditions per place. [2024-06-21 21:26:50,804 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 297 selfloop transitions, 22 changer transitions 16/337 dead transitions. [2024-06-21 21:26:50,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 337 transitions, 3590 flow [2024-06-21 21:26:50,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:26:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:26:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 21:26:50,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 21:26:50,805 INFO L175 Difference]: Start difference. First operand has 356 places, 304 transitions, 2484 flow. Second operand 12 states and 146 transitions. [2024-06-21 21:26:50,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 337 transitions, 3590 flow [2024-06-21 21:26:51,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 337 transitions, 3512 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:51,487 INFO L231 Difference]: Finished difference. Result has 359 places, 300 transitions, 2431 flow [2024-06-21 21:26:51,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2431, PETRI_PLACES=359, PETRI_TRANSITIONS=300} [2024-06-21 21:26:51,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2024-06-21 21:26:51,487 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 300 transitions, 2431 flow [2024-06-21 21:26:51,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:26:51,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:51,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:51,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:26:51,487 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:51,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -70060666, now seen corresponding path program 2 times [2024-06-21 21:26:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507600804] [2024-06-21 21:26:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:52,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507600804] [2024-06-21 21:26:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507600804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:52,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:52,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344343522] [2024-06-21 21:26:52,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:52,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:52,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:52,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 300 transitions, 2431 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:52,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:52,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:52,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:53,190 INFO L124 PetriNetUnfolderBase]: 849/1540 cut-off events. [2024-06-21 21:26:53,190 INFO L125 PetriNetUnfolderBase]: For 267676/267676 co-relation queries the response was YES. [2024-06-21 21:26:53,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9288 conditions, 1540 events. 849/1540 cut-off events. For 267676/267676 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8724 event pairs, 130 based on Foata normal form. 8/1546 useless extension candidates. Maximal degree in co-relation 9125. Up to 1278 conditions per place. [2024-06-21 21:26:53,205 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 293 selfloop transitions, 20 changer transitions 13/328 dead transitions. [2024-06-21 21:26:53,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 328 transitions, 3505 flow [2024-06-21 21:26:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:26:53,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:26:53,206 INFO L175 Difference]: Start difference. First operand has 359 places, 300 transitions, 2431 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:26:53,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 328 transitions, 3505 flow [2024-06-21 21:26:53,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 328 transitions, 3453 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 21:26:53,941 INFO L231 Difference]: Finished difference. Result has 353 places, 294 transitions, 2389 flow [2024-06-21 21:26:53,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2387, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2389, PETRI_PLACES=353, PETRI_TRANSITIONS=294} [2024-06-21 21:26:53,941 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2024-06-21 21:26:53,941 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 294 transitions, 2389 flow [2024-06-21 21:26:53,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:53,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:53,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:53,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:26:53,942 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:53,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -898417548, now seen corresponding path program 3 times [2024-06-21 21:26:53,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:53,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479106929] [2024-06-21 21:26:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:53,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479106929] [2024-06-21 21:26:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479106929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:55,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:55,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4248950] [2024-06-21 21:26:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:55,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:55,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 294 transitions, 2389 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:55,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:55,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:55,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:55,676 INFO L124 PetriNetUnfolderBase]: 830/1507 cut-off events. [2024-06-21 21:26:55,677 INFO L125 PetriNetUnfolderBase]: For 271677/271677 co-relation queries the response was YES. [2024-06-21 21:26:55,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8863 conditions, 1507 events. 830/1507 cut-off events. For 271677/271677 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 8489 event pairs, 137 based on Foata normal form. 12/1517 useless extension candidates. Maximal degree in co-relation 8703. Up to 1367 conditions per place. [2024-06-21 21:26:55,728 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 283 selfloop transitions, 25 changer transitions 7/317 dead transitions. [2024-06-21 21:26:55,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 317 transitions, 3149 flow [2024-06-21 21:26:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 21:26:55,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 21:26:55,730 INFO L175 Difference]: Start difference. First operand has 353 places, 294 transitions, 2389 flow. Second operand 11 states and 128 transitions. [2024-06-21 21:26:55,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 317 transitions, 3149 flow [2024-06-21 21:26:56,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 317 transitions, 3101 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 21:26:56,375 INFO L231 Difference]: Finished difference. Result has 345 places, 292 transitions, 2399 flow [2024-06-21 21:26:56,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2399, PETRI_PLACES=345, PETRI_TRANSITIONS=292} [2024-06-21 21:26:56,376 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2024-06-21 21:26:56,376 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 292 transitions, 2399 flow [2024-06-21 21:26:56,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:56,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:56,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:56,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:26:56,376 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:56,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1865714000, now seen corresponding path program 4 times [2024-06-21 21:26:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:56,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128544392] [2024-06-21 21:26:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:56,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:57,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:57,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128544392] [2024-06-21 21:26:57,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128544392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:57,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:57,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:26:57,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772415311] [2024-06-21 21:26:57,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:26:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:26:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:26:57,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:26:57,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 292 transitions, 2399 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:57,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:26:57,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:26:57,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:26:58,093 INFO L124 PetriNetUnfolderBase]: 816/1485 cut-off events. [2024-06-21 21:26:58,094 INFO L125 PetriNetUnfolderBase]: For 225073/225073 co-relation queries the response was YES. [2024-06-21 21:26:58,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8683 conditions, 1485 events. 816/1485 cut-off events. For 225073/225073 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8340 event pairs, 129 based on Foata normal form. 8/1491 useless extension candidates. Maximal degree in co-relation 8527. Up to 1278 conditions per place. [2024-06-21 21:26:58,108 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 284 selfloop transitions, 17 changer transitions 15/318 dead transitions. [2024-06-21 21:26:58,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 318 transitions, 3403 flow [2024-06-21 21:26:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:26:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:26:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:26:58,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:26:58,109 INFO L175 Difference]: Start difference. First operand has 345 places, 292 transitions, 2399 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:26:58,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 318 transitions, 3403 flow [2024-06-21 21:26:58,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 318 transitions, 3323 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:26:58,579 INFO L231 Difference]: Finished difference. Result has 347 places, 282 transitions, 2283 flow [2024-06-21 21:26:58,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2283, PETRI_PLACES=347, PETRI_TRANSITIONS=282} [2024-06-21 21:26:58,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2024-06-21 21:26:58,580 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 282 transitions, 2283 flow [2024-06-21 21:26:58,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:26:58,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:26:58,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:26:58,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:26:58,580 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:26:58,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:26:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1672820252, now seen corresponding path program 5 times [2024-06-21 21:26:58,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:26:58,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289157951] [2024-06-21 21:26:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:26:58,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:26:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:26:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:26:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:26:59,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289157951] [2024-06-21 21:26:59,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289157951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:26:59,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:26:59,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:26:59,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214735897] [2024-06-21 21:26:59,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:26:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:26:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:26:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:26:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:00,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:00,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 282 transitions, 2283 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:00,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:00,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:00,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:00,524 INFO L124 PetriNetUnfolderBase]: 769/1391 cut-off events. [2024-06-21 21:27:00,524 INFO L125 PetriNetUnfolderBase]: For 168346/168346 co-relation queries the response was YES. [2024-06-21 21:27:00,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7030 conditions, 1391 events. 769/1391 cut-off events. For 168346/168346 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 7719 event pairs, 118 based on Foata normal form. 10/1399 useless extension candidates. Maximal degree in co-relation 6873. Up to 1278 conditions per place. [2024-06-21 21:27:00,538 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 267 selfloop transitions, 11 changer transitions 25/305 dead transitions. [2024-06-21 21:27:00,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 305 transitions, 2987 flow [2024-06-21 21:27:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 21:27:00,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 21:27:00,539 INFO L175 Difference]: Start difference. First operand has 347 places, 282 transitions, 2283 flow. Second operand 12 states and 131 transitions. [2024-06-21 21:27:00,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 305 transitions, 2987 flow [2024-06-21 21:27:00,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 305 transitions, 2932 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-21 21:27:00,929 INFO L231 Difference]: Finished difference. Result has 336 places, 273 transitions, 2185 flow [2024-06-21 21:27:00,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2185, PETRI_PLACES=336, PETRI_TRANSITIONS=273} [2024-06-21 21:27:00,930 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2024-06-21 21:27:00,930 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 273 transitions, 2185 flow [2024-06-21 21:27:00,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:00,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:00,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:00,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:27:00,931 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:00,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:00,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1747818662, now seen corresponding path program 1 times [2024-06-21 21:27:00,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:00,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992028099] [2024-06-21 21:27:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:02,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:02,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992028099] [2024-06-21 21:27:02,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992028099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:02,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:02,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:02,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707722070] [2024-06-21 21:27:02,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:02,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:02,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:02,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:02,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 273 transitions, 2185 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:02,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:02,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:02,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:03,155 INFO L124 PetriNetUnfolderBase]: 733/1318 cut-off events. [2024-06-21 21:27:03,155 INFO L125 PetriNetUnfolderBase]: For 102192/102192 co-relation queries the response was YES. [2024-06-21 21:27:03,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6703 conditions, 1318 events. 733/1318 cut-off events. For 102192/102192 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 7297 event pairs, 66 based on Foata normal form. 2/1318 useless extension candidates. Maximal degree in co-relation 6550. Up to 980 conditions per place. [2024-06-21 21:27:03,168 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 207 selfloop transitions, 85 changer transitions 0/294 dead transitions. [2024-06-21 21:27:03,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 294 transitions, 2867 flow [2024-06-21 21:27:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:27:03,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:27:03,169 INFO L175 Difference]: Start difference. First operand has 336 places, 273 transitions, 2185 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:27:03,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 294 transitions, 2867 flow [2024-06-21 21:27:03,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 294 transitions, 2819 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 21:27:03,587 INFO L231 Difference]: Finished difference. Result has 322 places, 276 transitions, 2378 flow [2024-06-21 21:27:03,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2378, PETRI_PLACES=322, PETRI_TRANSITIONS=276} [2024-06-21 21:27:03,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-21 21:27:03,588 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 276 transitions, 2378 flow [2024-06-21 21:27:03,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:03,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:03,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:03,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:27:03,588 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:03,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1747638738, now seen corresponding path program 6 times [2024-06-21 21:27:03,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:03,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358197607] [2024-06-21 21:27:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:03,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:04,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:04,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358197607] [2024-06-21 21:27:04,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358197607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:04,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:04,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:04,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152149264] [2024-06-21 21:27:04,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:04,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:04,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:04,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:04,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:04,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 276 transitions, 2378 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:04,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:04,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:04,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:05,339 INFO L124 PetriNetUnfolderBase]: 749/1354 cut-off events. [2024-06-21 21:27:05,339 INFO L125 PetriNetUnfolderBase]: For 145565/145565 co-relation queries the response was YES. [2024-06-21 21:27:05,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 1354 events. 749/1354 cut-off events. For 145565/145565 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7486 event pairs, 96 based on Foata normal form. 10/1362 useless extension candidates. Maximal degree in co-relation 6830. Up to 736 conditions per place. [2024-06-21 21:27:05,353 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 169 selfloop transitions, 120 changer transitions 8/299 dead transitions. [2024-06-21 21:27:05,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 299 transitions, 3068 flow [2024-06-21 21:27:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 21:27:05,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 21:27:05,354 INFO L175 Difference]: Start difference. First operand has 322 places, 276 transitions, 2378 flow. Second operand 11 states and 144 transitions. [2024-06-21 21:27:05,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 299 transitions, 3068 flow [2024-06-21 21:27:05,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 299 transitions, 2885 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:27:05,765 INFO L231 Difference]: Finished difference. Result has 326 places, 272 transitions, 2411 flow [2024-06-21 21:27:05,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2411, PETRI_PLACES=326, PETRI_TRANSITIONS=272} [2024-06-21 21:27:05,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2024-06-21 21:27:05,765 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 272 transitions, 2411 flow [2024-06-21 21:27:05,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:05,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:05,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:27:05,766 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:05,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:05,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1743050118, now seen corresponding path program 7 times [2024-06-21 21:27:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:05,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437217647] [2024-06-21 21:27:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:05,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:06,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:06,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437217647] [2024-06-21 21:27:06,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437217647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:06,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:27:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210467009] [2024-06-21 21:27:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:27:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:27:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:27:06,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:06,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 272 transitions, 2411 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:06,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:06,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:06,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:07,392 INFO L124 PetriNetUnfolderBase]: 771/1404 cut-off events. [2024-06-21 21:27:07,392 INFO L125 PetriNetUnfolderBase]: For 212588/212588 co-relation queries the response was YES. [2024-06-21 21:27:07,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8675 conditions, 1404 events. 771/1404 cut-off events. For 212588/212588 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 7810 event pairs, 116 based on Foata normal form. 8/1410 useless extension candidates. Maximal degree in co-relation 8524. Up to 656 conditions per place. [2024-06-21 21:27:07,405 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 174 selfloop transitions, 114 changer transitions 10/300 dead transitions. [2024-06-21 21:27:07,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 300 transitions, 3395 flow [2024-06-21 21:27:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 21:27:07,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 21:27:07,406 INFO L175 Difference]: Start difference. First operand has 326 places, 272 transitions, 2411 flow. Second operand 11 states and 144 transitions. [2024-06-21 21:27:07,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 300 transitions, 3395 flow [2024-06-21 21:27:07,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 300 transitions, 3143 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 21:27:07,988 INFO L231 Difference]: Finished difference. Result has 324 places, 269 transitions, 2375 flow [2024-06-21 21:27:07,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2161, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2375, PETRI_PLACES=324, PETRI_TRANSITIONS=269} [2024-06-21 21:27:07,988 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2024-06-21 21:27:07,988 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 269 transitions, 2375 flow [2024-06-21 21:27:07,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:07,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:07,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:07,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:27:07,988 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:07,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:07,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1743165438, now seen corresponding path program 8 times [2024-06-21 21:27:07,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:07,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149491794] [2024-06-21 21:27:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:07,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149491794] [2024-06-21 21:27:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149491794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:09,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:09,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139655722] [2024-06-21 21:27:09,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:09,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:09,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:09,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 269 transitions, 2375 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:09,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:09,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:09,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:10,014 INFO L124 PetriNetUnfolderBase]: 761/1386 cut-off events. [2024-06-21 21:27:10,015 INFO L125 PetriNetUnfolderBase]: For 212492/212492 co-relation queries the response was YES. [2024-06-21 21:27:10,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8592 conditions, 1386 events. 761/1386 cut-off events. For 212492/212492 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7730 event pairs, 90 based on Foata normal form. 8/1392 useless extension candidates. Maximal degree in co-relation 8442. Up to 974 conditions per place. [2024-06-21 21:27:10,028 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 187 selfloop transitions, 91 changer transitions 12/292 dead transitions. [2024-06-21 21:27:10,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 292 transitions, 3039 flow [2024-06-21 21:27:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 21:27:10,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 21:27:10,029 INFO L175 Difference]: Start difference. First operand has 324 places, 269 transitions, 2375 flow. Second operand 12 states and 146 transitions. [2024-06-21 21:27:10,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 292 transitions, 3039 flow [2024-06-21 21:27:10,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 292 transitions, 2819 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:10,678 INFO L231 Difference]: Finished difference. Result has 322 places, 265 transitions, 2315 flow [2024-06-21 21:27:10,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2315, PETRI_PLACES=322, PETRI_TRANSITIONS=265} [2024-06-21 21:27:10,679 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-21 21:27:10,679 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 265 transitions, 2315 flow [2024-06-21 21:27:10,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:10,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:10,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:10,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:27:10,679 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:10,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1747634088, now seen corresponding path program 9 times [2024-06-21 21:27:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638189878] [2024-06-21 21:27:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:11,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638189878] [2024-06-21 21:27:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638189878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:11,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:11,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:27:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101345052] [2024-06-21 21:27:11,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:11,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:27:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:27:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:27:11,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:11,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 265 transitions, 2315 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:11,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:11,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:11,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:12,347 INFO L124 PetriNetUnfolderBase]: 782/1429 cut-off events. [2024-06-21 21:27:12,347 INFO L125 PetriNetUnfolderBase]: For 269042/269042 co-relation queries the response was YES. [2024-06-21 21:27:12,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9830 conditions, 1429 events. 782/1429 cut-off events. For 269042/269042 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 7974 event pairs, 127 based on Foata normal form. 8/1435 useless extension candidates. Maximal degree in co-relation 9682. Up to 760 conditions per place. [2024-06-21 21:27:12,361 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 169 selfloop transitions, 113 changer transitions 8/292 dead transitions. [2024-06-21 21:27:12,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 292 transitions, 3249 flow [2024-06-21 21:27:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 21:27:12,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 21:27:12,362 INFO L175 Difference]: Start difference. First operand has 322 places, 265 transitions, 2315 flow. Second operand 11 states and 146 transitions. [2024-06-21 21:27:12,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 292 transitions, 3249 flow [2024-06-21 21:27:13,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 292 transitions, 3063 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:13,276 INFO L231 Difference]: Finished difference. Result has 317 places, 262 transitions, 2342 flow [2024-06-21 21:27:13,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2342, PETRI_PLACES=317, PETRI_TRANSITIONS=262} [2024-06-21 21:27:13,276 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2024-06-21 21:27:13,276 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 262 transitions, 2342 flow [2024-06-21 21:27:13,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:13,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:13,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:13,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:27:13,277 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:13,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:13,277 INFO L85 PathProgramCache]: Analyzing trace with hash -47956936, now seen corresponding path program 10 times [2024-06-21 21:27:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:13,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107922353] [2024-06-21 21:27:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107922353] [2024-06-21 21:27:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107922353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:14,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:14,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:14,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623280869] [2024-06-21 21:27:14,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:15,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:15,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 262 transitions, 2342 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:15,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:15,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:15,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:15,694 INFO L124 PetriNetUnfolderBase]: 765/1398 cut-off events. [2024-06-21 21:27:15,694 INFO L125 PetriNetUnfolderBase]: For 252396/252396 co-relation queries the response was YES. [2024-06-21 21:27:15,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9260 conditions, 1398 events. 765/1398 cut-off events. For 252396/252396 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7766 event pairs, 127 based on Foata normal form. 10/1406 useless extension candidates. Maximal degree in co-relation 9114. Up to 797 conditions per place. [2024-06-21 21:27:15,708 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 113 changer transitions 9/286 dead transitions. [2024-06-21 21:27:15,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 286 transitions, 3008 flow [2024-06-21 21:27:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 21:27:15,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 21:27:15,709 INFO L175 Difference]: Start difference. First operand has 317 places, 262 transitions, 2342 flow. Second operand 12 states and 149 transitions. [2024-06-21 21:27:15,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 286 transitions, 3008 flow [2024-06-21 21:27:16,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 286 transitions, 2781 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:16,402 INFO L231 Difference]: Finished difference. Result has 316 places, 259 transitions, 2321 flow [2024-06-21 21:27:16,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2321, PETRI_PLACES=316, PETRI_TRANSITIONS=259} [2024-06-21 21:27:16,403 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 21:27:16,403 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 259 transitions, 2321 flow [2024-06-21 21:27:16,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:16,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:16,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:16,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:27:16,403 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:16,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash 118283788, now seen corresponding path program 2 times [2024-06-21 21:27:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:16,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043907540] [2024-06-21 21:27:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:18,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043907540] [2024-06-21 21:27:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043907540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:18,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:18,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:18,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022372501] [2024-06-21 21:27:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:18,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:18,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:18,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 259 transitions, 2321 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:18,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:18,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:18,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:18,876 INFO L124 PetriNetUnfolderBase]: 759/1392 cut-off events. [2024-06-21 21:27:18,877 INFO L125 PetriNetUnfolderBase]: For 259389/259389 co-relation queries the response was YES. [2024-06-21 21:27:18,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9247 conditions, 1392 events. 759/1392 cut-off events. For 259389/259389 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 7748 event pairs, 129 based on Foata normal form. 12/1402 useless extension candidates. Maximal degree in co-relation 9102. Up to 793 conditions per place. [2024-06-21 21:27:18,888 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 161 selfloop transitions, 109 changer transitions 12/284 dead transitions. [2024-06-21 21:27:18,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 284 transitions, 3015 flow [2024-06-21 21:27:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 21:27:18,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 21:27:18,889 INFO L175 Difference]: Start difference. First operand has 316 places, 259 transitions, 2321 flow. Second operand 12 states and 149 transitions. [2024-06-21 21:27:18,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 284 transitions, 3015 flow [2024-06-21 21:27:19,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 284 transitions, 2783 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:27:19,616 INFO L231 Difference]: Finished difference. Result has 314 places, 254 transitions, 2299 flow [2024-06-21 21:27:19,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2299, PETRI_PLACES=314, PETRI_TRANSITIONS=254} [2024-06-21 21:27:19,617 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 21:27:19,617 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 254 transitions, 2299 flow [2024-06-21 21:27:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:19,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:19,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:19,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:27:19,618 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:19,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash 118099214, now seen corresponding path program 11 times [2024-06-21 21:27:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:19,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390349366] [2024-06-21 21:27:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:19,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:21,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:21,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390349366] [2024-06-21 21:27:21,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390349366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:21,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:21,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:21,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65640551] [2024-06-21 21:27:21,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:21,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:21,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:21,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:21,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 254 transitions, 2299 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:21,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:21,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:21,917 INFO L124 PetriNetUnfolderBase]: 752/1391 cut-off events. [2024-06-21 21:27:21,917 INFO L125 PetriNetUnfolderBase]: For 265170/265170 co-relation queries the response was YES. [2024-06-21 21:27:21,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9824 conditions, 1391 events. 752/1391 cut-off events. For 265170/265170 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 7810 event pairs, 110 based on Foata normal form. 8/1397 useless extension candidates. Maximal degree in co-relation 9680. Up to 945 conditions per place. [2024-06-21 21:27:21,930 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 80 changer transitions 8/282 dead transitions. [2024-06-21 21:27:21,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 282 transitions, 3209 flow [2024-06-21 21:27:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 21:27:21,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:27:21,931 INFO L175 Difference]: Start difference. First operand has 314 places, 254 transitions, 2299 flow. Second operand 12 states and 148 transitions. [2024-06-21 21:27:21,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 282 transitions, 3209 flow [2024-06-21 21:27:22,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 282 transitions, 2946 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-21 21:27:22,575 INFO L231 Difference]: Finished difference. Result has 312 places, 251 transitions, 2181 flow [2024-06-21 21:27:22,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2181, PETRI_PLACES=312, PETRI_TRANSITIONS=251} [2024-06-21 21:27:22,575 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-06-21 21:27:22,575 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 251 transitions, 2181 flow [2024-06-21 21:27:22,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:22,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:22,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 21:27:22,576 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:22,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash 124770538, now seen corresponding path program 3 times [2024-06-21 21:27:22,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:22,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520282619] [2024-06-21 21:27:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:22,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:23,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:23,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520282619] [2024-06-21 21:27:23,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520282619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:23,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:23,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:23,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636513280] [2024-06-21 21:27:23,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:23,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:23,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:23,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:24,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:24,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 251 transitions, 2181 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:24,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:24,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:24,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:24,430 INFO L124 PetriNetUnfolderBase]: 730/1345 cut-off events. [2024-06-21 21:27:24,431 INFO L125 PetriNetUnfolderBase]: For 219164/219164 co-relation queries the response was YES. [2024-06-21 21:27:24,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9268 conditions, 1345 events. 730/1345 cut-off events. For 219164/219164 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7462 event pairs, 115 based on Foata normal form. 2/1345 useless extension candidates. Maximal degree in co-relation 9124. Up to 1007 conditions per place. [2024-06-21 21:27:24,444 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 186 selfloop transitions, 81 changer transitions 0/269 dead transitions. [2024-06-21 21:27:24,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 269 transitions, 2795 flow [2024-06-21 21:27:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 21:27:24,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 21:27:24,445 INFO L175 Difference]: Start difference. First operand has 312 places, 251 transitions, 2181 flow. Second operand 11 states and 129 transitions. [2024-06-21 21:27:24,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 269 transitions, 2795 flow [2024-06-21 21:27:25,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 269 transitions, 2631 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 21:27:25,185 INFO L231 Difference]: Finished difference. Result has 308 places, 252 transitions, 2219 flow [2024-06-21 21:27:25,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2219, PETRI_PLACES=308, PETRI_TRANSITIONS=252} [2024-06-21 21:27:25,185 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-21 21:27:25,185 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 252 transitions, 2219 flow [2024-06-21 21:27:25,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:25,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:25,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:25,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 21:27:25,186 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:25,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:25,186 INFO L85 PathProgramCache]: Analyzing trace with hash 124532954, now seen corresponding path program 12 times [2024-06-21 21:27:25,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:25,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491912753] [2024-06-21 21:27:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:26,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:26,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491912753] [2024-06-21 21:27:26,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491912753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:26,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:26,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491607195] [2024-06-21 21:27:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:26,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:26,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:26,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 252 transitions, 2219 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:26,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:26,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:26,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:27,449 INFO L124 PetriNetUnfolderBase]: 725/1342 cut-off events. [2024-06-21 21:27:27,449 INFO L125 PetriNetUnfolderBase]: For 231827/231827 co-relation queries the response was YES. [2024-06-21 21:27:27,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8106 conditions, 1342 events. 725/1342 cut-off events. For 231827/231827 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7498 event pairs, 106 based on Foata normal form. 16/1356 useless extension candidates. Maximal degree in co-relation 7964. Up to 930 conditions per place. [2024-06-21 21:27:27,462 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 77 changer transitions 16/275 dead transitions. [2024-06-21 21:27:27,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 275 transitions, 2859 flow [2024-06-21 21:27:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 21:27:27,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 21:27:27,463 INFO L175 Difference]: Start difference. First operand has 308 places, 252 transitions, 2219 flow. Second operand 12 states and 143 transitions. [2024-06-21 21:27:27,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 275 transitions, 2859 flow [2024-06-21 21:27:28,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 275 transitions, 2667 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:27:28,050 INFO L231 Difference]: Finished difference. Result has 311 places, 246 transitions, 2145 flow [2024-06-21 21:27:28,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2145, PETRI_PLACES=311, PETRI_TRANSITIONS=246} [2024-06-21 21:27:28,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-21 21:27:28,050 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 246 transitions, 2145 flow [2024-06-21 21:27:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:28,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:28,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:28,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 21:27:28,050 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:28,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash 124778908, now seen corresponding path program 4 times [2024-06-21 21:27:28,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:28,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939474064] [2024-06-21 21:27:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:29,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939474064] [2024-06-21 21:27:29,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939474064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:29,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:29,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399771772] [2024-06-21 21:27:29,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:29,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:29,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:29,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:29,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:29,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 246 transitions, 2145 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:29,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:29,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:29,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:29,814 INFO L124 PetriNetUnfolderBase]: 685/1262 cut-off events. [2024-06-21 21:27:29,815 INFO L125 PetriNetUnfolderBase]: For 157630/157630 co-relation queries the response was YES. [2024-06-21 21:27:29,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7815 conditions, 1262 events. 685/1262 cut-off events. For 157630/157630 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6933 event pairs, 86 based on Foata normal form. 2/1262 useless extension candidates. Maximal degree in co-relation 7672. Up to 912 conditions per place. [2024-06-21 21:27:29,826 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 181 selfloop transitions, 81 changer transitions 0/264 dead transitions. [2024-06-21 21:27:29,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 264 transitions, 2749 flow [2024-06-21 21:27:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 21:27:29,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 21:27:29,827 INFO L175 Difference]: Start difference. First operand has 311 places, 246 transitions, 2145 flow. Second operand 11 states and 128 transitions. [2024-06-21 21:27:29,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 264 transitions, 2749 flow [2024-06-21 21:27:30,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 264 transitions, 2579 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 21:27:30,320 INFO L231 Difference]: Finished difference. Result has 303 places, 247 transitions, 2179 flow [2024-06-21 21:27:30,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2179, PETRI_PLACES=303, PETRI_TRANSITIONS=247} [2024-06-21 21:27:30,320 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-21 21:27:30,320 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 247 transitions, 2179 flow [2024-06-21 21:27:30,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:30,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:30,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 21:27:30,320 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:30,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash 390188360, now seen corresponding path program 5 times [2024-06-21 21:27:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:30,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788368606] [2024-06-21 21:27:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788368606] [2024-06-21 21:27:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788368606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:31,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036076331] [2024-06-21 21:27:31,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:31,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:31,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:31,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:31,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 247 transitions, 2179 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:31,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:31,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:31,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:32,222 INFO L124 PetriNetUnfolderBase]: 689/1270 cut-off events. [2024-06-21 21:27:32,222 INFO L125 PetriNetUnfolderBase]: For 148176/148176 co-relation queries the response was YES. [2024-06-21 21:27:32,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 1270 events. 689/1270 cut-off events. For 148176/148176 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 6961 event pairs, 104 based on Foata normal form. 2/1270 useless extension candidates. Maximal degree in co-relation 7686. Up to 1102 conditions per place. [2024-06-21 21:27:32,235 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 212 selfloop transitions, 52 changer transitions 0/266 dead transitions. [2024-06-21 21:27:32,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 266 transitions, 2791 flow [2024-06-21 21:27:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 21:27:32,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 21:27:32,236 INFO L175 Difference]: Start difference. First operand has 303 places, 247 transitions, 2179 flow. Second operand 11 states and 134 transitions. [2024-06-21 21:27:32,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 266 transitions, 2791 flow [2024-06-21 21:27:32,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 266 transitions, 2601 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 21:27:32,772 INFO L231 Difference]: Finished difference. Result has 305 places, 248 transitions, 2133 flow [2024-06-21 21:27:32,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2133, PETRI_PLACES=305, PETRI_TRANSITIONS=248} [2024-06-21 21:27:32,773 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 21:27:32,773 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 248 transitions, 2133 flow [2024-06-21 21:27:32,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:32,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:32,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:32,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 21:27:32,773 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:32,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2109001912, now seen corresponding path program 6 times [2024-06-21 21:27:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560277681] [2024-06-21 21:27:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:32,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:34,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:34,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560277681] [2024-06-21 21:27:34,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560277681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:34,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:34,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:34,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245921324] [2024-06-21 21:27:34,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:34,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:34,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:34,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:34,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 248 transitions, 2133 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:34,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:34,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:34,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:34,608 INFO L124 PetriNetUnfolderBase]: 700/1291 cut-off events. [2024-06-21 21:27:34,608 INFO L125 PetriNetUnfolderBase]: For 165521/165521 co-relation queries the response was YES. [2024-06-21 21:27:34,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8153 conditions, 1291 events. 700/1291 cut-off events. For 165521/165521 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7117 event pairs, 105 based on Foata normal form. 2/1291 useless extension candidates. Maximal degree in co-relation 8012. Up to 1098 conditions per place. [2024-06-21 21:27:34,620 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 213 selfloop transitions, 54 changer transitions 0/269 dead transitions. [2024-06-21 21:27:34,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 269 transitions, 3005 flow [2024-06-21 21:27:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 21:27:34,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 21:27:34,621 INFO L175 Difference]: Start difference. First operand has 305 places, 248 transitions, 2133 flow. Second operand 11 states and 135 transitions. [2024-06-21 21:27:34,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 269 transitions, 3005 flow [2024-06-21 21:27:35,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 269 transitions, 2871 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:27:35,086 INFO L231 Difference]: Finished difference. Result has 307 places, 250 transitions, 2185 flow [2024-06-21 21:27:35,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1999, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2185, PETRI_PLACES=307, PETRI_TRANSITIONS=250} [2024-06-21 21:27:35,086 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 21:27:35,087 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 250 transitions, 2185 flow [2024-06-21 21:27:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:35,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:35,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:35,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 21:27:35,087 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:35,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2109247866, now seen corresponding path program 13 times [2024-06-21 21:27:35,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:35,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629538917] [2024-06-21 21:27:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629538917] [2024-06-21 21:27:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629538917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:36,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:36,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:36,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780969291] [2024-06-21 21:27:36,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:36,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:36,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:37,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:37,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 250 transitions, 2185 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:37,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:37,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:37,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:37,616 INFO L124 PetriNetUnfolderBase]: 716/1327 cut-off events. [2024-06-21 21:27:37,616 INFO L125 PetriNetUnfolderBase]: For 214296/214296 co-relation queries the response was YES. [2024-06-21 21:27:37,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8278 conditions, 1327 events. 716/1327 cut-off events. For 214296/214296 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7417 event pairs, 109 based on Foata normal form. 10/1335 useless extension candidates. Maximal degree in co-relation 8136. Up to 1115 conditions per place. [2024-06-21 21:27:37,629 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 50 changer transitions 11/274 dead transitions. [2024-06-21 21:27:37,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 274 transitions, 2827 flow [2024-06-21 21:27:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 21:27:37,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 21:27:37,630 INFO L175 Difference]: Start difference. First operand has 307 places, 250 transitions, 2185 flow. Second operand 12 states and 147 transitions. [2024-06-21 21:27:37,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 274 transitions, 2827 flow [2024-06-21 21:27:38,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 274 transitions, 2717 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 21:27:38,145 INFO L231 Difference]: Finished difference. Result has 312 places, 247 transitions, 2158 flow [2024-06-21 21:27:38,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2158, PETRI_PLACES=312, PETRI_TRANSITIONS=247} [2024-06-21 21:27:38,146 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-06-21 21:27:38,146 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 247 transitions, 2158 flow [2024-06-21 21:27:38,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:38,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:38,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:38,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 21:27:38,146 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:38,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 383701610, now seen corresponding path program 7 times [2024-06-21 21:27:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:38,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967317152] [2024-06-21 21:27:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:38,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:39,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:39,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967317152] [2024-06-21 21:27:39,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967317152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:39,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:39,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258218161] [2024-06-21 21:27:39,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:39,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:39,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 247 transitions, 2158 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:39,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:39,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:39,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:40,240 INFO L124 PetriNetUnfolderBase]: 694/1285 cut-off events. [2024-06-21 21:27:40,240 INFO L125 PetriNetUnfolderBase]: For 170855/170855 co-relation queries the response was YES. [2024-06-21 21:27:40,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8170 conditions, 1285 events. 694/1285 cut-off events. For 170855/170855 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7093 event pairs, 113 based on Foata normal form. 2/1285 useless extension candidates. Maximal degree in co-relation 8026. Up to 1117 conditions per place. [2024-06-21 21:27:40,252 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 215 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-21 21:27:40,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 267 transitions, 2772 flow [2024-06-21 21:27:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:27:40,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:27:40,253 INFO L175 Difference]: Start difference. First operand has 312 places, 247 transitions, 2158 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:27:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 267 transitions, 2772 flow [2024-06-21 21:27:40,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 267 transitions, 2668 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:27:40,736 INFO L231 Difference]: Finished difference. Result has 309 places, 248 transitions, 2190 flow [2024-06-21 21:27:40,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2190, PETRI_PLACES=309, PETRI_TRANSITIONS=248} [2024-06-21 21:27:40,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-06-21 21:27:40,736 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 248 transitions, 2190 flow [2024-06-21 21:27:40,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:40,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:40,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:40,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 21:27:40,737 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:40,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1957935912, now seen corresponding path program 8 times [2024-06-21 21:27:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39673047] [2024-06-21 21:27:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:41,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:41,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39673047] [2024-06-21 21:27:41,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39673047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:41,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:41,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929052617] [2024-06-21 21:27:41,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:41,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:42,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:42,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 248 transitions, 2190 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:42,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:42,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:42,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:42,491 INFO L124 PetriNetUnfolderBase]: 706/1313 cut-off events. [2024-06-21 21:27:42,492 INFO L125 PetriNetUnfolderBase]: For 200829/200829 co-relation queries the response was YES. [2024-06-21 21:27:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8303 conditions, 1313 events. 706/1313 cut-off events. For 200829/200829 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7308 event pairs, 123 based on Foata normal form. 8/1319 useless extension candidates. Maximal degree in co-relation 8160. Up to 1152 conditions per place. [2024-06-21 21:27:42,505 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 225 selfloop transitions, 32 changer transitions 13/272 dead transitions. [2024-06-21 21:27:42,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 272 transitions, 2875 flow [2024-06-21 21:27:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 21:27:42,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 21:27:42,506 INFO L175 Difference]: Start difference. First operand has 309 places, 248 transitions, 2190 flow. Second operand 11 states and 131 transitions. [2024-06-21 21:27:42,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 272 transitions, 2875 flow [2024-06-21 21:27:43,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 272 transitions, 2724 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:43,058 INFO L231 Difference]: Finished difference. Result has 311 places, 246 transitions, 2092 flow [2024-06-21 21:27:43,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2092, PETRI_PLACES=311, PETRI_TRANSITIONS=246} [2024-06-21 21:27:43,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-21 21:27:43,058 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 246 transitions, 2092 flow [2024-06-21 21:27:43,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:43,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:43,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:43,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 21:27:43,059 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:43,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1957927542, now seen corresponding path program 9 times [2024-06-21 21:27:43,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:43,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901973042] [2024-06-21 21:27:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:43,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:44,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:44,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901973042] [2024-06-21 21:27:44,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901973042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:44,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:44,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:27:44,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060969855] [2024-06-21 21:27:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:44,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:27:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:27:44,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:27:44,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:44,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 246 transitions, 2092 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:44,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:44,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:44,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:44,686 INFO L124 PetriNetUnfolderBase]: 672/1243 cut-off events. [2024-06-21 21:27:44,686 INFO L125 PetriNetUnfolderBase]: For 170595/170595 co-relation queries the response was YES. [2024-06-21 21:27:44,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 1243 events. 672/1243 cut-off events. For 170595/170595 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6786 event pairs, 108 based on Foata normal form. 2/1243 useless extension candidates. Maximal degree in co-relation 7792. Up to 1137 conditions per place. [2024-06-21 21:27:44,699 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 225 selfloop transitions, 37 changer transitions 0/264 dead transitions. [2024-06-21 21:27:44,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 264 transitions, 2698 flow [2024-06-21 21:27:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:27:44,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:27:44,700 INFO L175 Difference]: Start difference. First operand has 311 places, 246 transitions, 2092 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:27:44,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 264 transitions, 2698 flow [2024-06-21 21:27:45,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 264 transitions, 2622 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:45,241 INFO L231 Difference]: Finished difference. Result has 310 places, 247 transitions, 2134 flow [2024-06-21 21:27:45,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2134, PETRI_PLACES=310, PETRI_TRANSITIONS=247} [2024-06-21 21:27:45,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-06-21 21:27:45,242 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 247 transitions, 2134 flow [2024-06-21 21:27:45,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:27:45,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:45,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:45,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 21:27:45,242 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:45,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2100856024, now seen corresponding path program 10 times [2024-06-21 21:27:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:45,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560707379] [2024-06-21 21:27:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560707379] [2024-06-21 21:27:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560707379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:46,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:46,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522677055] [2024-06-21 21:27:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:46,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:46,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 247 transitions, 2134 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:46,938 INFO L124 PetriNetUnfolderBase]: 692/1287 cut-off events. [2024-06-21 21:27:46,938 INFO L125 PetriNetUnfolderBase]: For 230563/230563 co-relation queries the response was YES. [2024-06-21 21:27:46,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8176 conditions, 1287 events. 692/1287 cut-off events. For 230563/230563 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7160 event pairs, 113 based on Foata normal form. 12/1297 useless extension candidates. Maximal degree in co-relation 8032. Up to 1103 conditions per place. [2024-06-21 21:27:46,950 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 218 selfloop transitions, 43 changer transitions 7/270 dead transitions. [2024-06-21 21:27:46,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 270 transitions, 2802 flow [2024-06-21 21:27:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:27:46,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:27:46,951 INFO L175 Difference]: Start difference. First operand has 310 places, 247 transitions, 2134 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:27:46,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 270 transitions, 2802 flow [2024-06-21 21:27:47,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 270 transitions, 2694 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 21:27:47,495 INFO L231 Difference]: Finished difference. Result has 312 places, 245 transitions, 2140 flow [2024-06-21 21:27:47,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2140, PETRI_PLACES=312, PETRI_TRANSITIONS=245} [2024-06-21 21:27:47,495 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-06-21 21:27:47,496 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 245 transitions, 2140 flow [2024-06-21 21:27:47,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:47,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:47,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:47,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 21:27:47,496 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:47,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1957639242, now seen corresponding path program 11 times [2024-06-21 21:27:47,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:47,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707922925] [2024-06-21 21:27:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:48,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:48,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707922925] [2024-06-21 21:27:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707922925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:48,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:48,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709569782] [2024-06-21 21:27:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:48,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:48,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:48,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 245 transitions, 2140 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:48,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:48,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:48,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:49,354 INFO L124 PetriNetUnfolderBase]: 672/1247 cut-off events. [2024-06-21 21:27:49,354 INFO L125 PetriNetUnfolderBase]: For 174675/174675 co-relation queries the response was YES. [2024-06-21 21:27:49,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8073 conditions, 1247 events. 672/1247 cut-off events. For 174675/174675 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6875 event pairs, 111 based on Foata normal form. 2/1247 useless extension candidates. Maximal degree in co-relation 7928. Up to 1152 conditions per place. [2024-06-21 21:27:49,393 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 227 selfloop transitions, 34 changer transitions 0/263 dead transitions. [2024-06-21 21:27:49,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 263 transitions, 2746 flow [2024-06-21 21:27:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:27:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:27:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 21:27:49,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:27:49,394 INFO L175 Difference]: Start difference. First operand has 312 places, 245 transitions, 2140 flow. Second operand 11 states and 124 transitions. [2024-06-21 21:27:49,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 263 transitions, 2746 flow [2024-06-21 21:27:49,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 263 transitions, 2621 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:49,942 INFO L231 Difference]: Finished difference. Result has 313 places, 246 transitions, 2131 flow [2024-06-21 21:27:49,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2131, PETRI_PLACES=313, PETRI_TRANSITIONS=246} [2024-06-21 21:27:49,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 21:27:49,942 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 246 transitions, 2131 flow [2024-06-21 21:27:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:49,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:49,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:49,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 21:27:49,943 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:49,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash 383517036, now seen corresponding path program 14 times [2024-06-21 21:27:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:49,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982550839] [2024-06-21 21:27:49,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982550839] [2024-06-21 21:27:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982550839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:51,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:51,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773913473] [2024-06-21 21:27:51,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:51,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:51,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:51,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:51,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 246 transitions, 2131 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:51,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:51,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:51,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:52,224 INFO L124 PetriNetUnfolderBase]: 713/1334 cut-off events. [2024-06-21 21:27:52,225 INFO L125 PetriNetUnfolderBase]: For 275597/275597 co-relation queries the response was YES. [2024-06-21 21:27:52,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9456 conditions, 1334 events. 713/1334 cut-off events. For 275597/275597 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7517 event pairs, 120 based on Foata normal form. 8/1340 useless extension candidates. Maximal degree in co-relation 9310. Up to 1034 conditions per place. [2024-06-21 21:27:52,235 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 215 selfloop transitions, 51 changer transitions 7/275 dead transitions. [2024-06-21 21:27:52,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 275 transitions, 3033 flow [2024-06-21 21:27:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-06-21 21:27:52,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2024-06-21 21:27:52,240 INFO L175 Difference]: Start difference. First operand has 313 places, 246 transitions, 2131 flow. Second operand 12 states and 154 transitions. [2024-06-21 21:27:52,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 275 transitions, 3033 flow [2024-06-21 21:27:52,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 275 transitions, 2927 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 21:27:52,965 INFO L231 Difference]: Finished difference. Result has 316 places, 244 transitions, 2118 flow [2024-06-21 21:27:52,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2118, PETRI_PLACES=316, PETRI_TRANSITIONS=244} [2024-06-21 21:27:52,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 21:27:52,965 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 244 transitions, 2118 flow [2024-06-21 21:27:52,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:52,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:52,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:52,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 21:27:52,966 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:52,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2100849080, now seen corresponding path program 15 times [2024-06-21 21:27:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:52,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237480870] [2024-06-21 21:27:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:52,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:54,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:54,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237480870] [2024-06-21 21:27:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237480870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:54,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:54,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:54,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797322663] [2024-06-21 21:27:54,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:54,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:54,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 244 transitions, 2118 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:54,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:54,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:54,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:55,072 INFO L124 PetriNetUnfolderBase]: 711/1332 cut-off events. [2024-06-21 21:27:55,073 INFO L125 PetriNetUnfolderBase]: For 292668/292668 co-relation queries the response was YES. [2024-06-21 21:27:55,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9465 conditions, 1332 events. 711/1332 cut-off events. For 292668/292668 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7498 event pairs, 134 based on Foata normal form. 10/1340 useless extension candidates. Maximal degree in co-relation 9318. Up to 1154 conditions per place. [2024-06-21 21:27:55,086 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 217 selfloop transitions, 40 changer transitions 9/268 dead transitions. [2024-06-21 21:27:55,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 268 transitions, 2748 flow [2024-06-21 21:27:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:55,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 21:27:55,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 21:27:55,087 INFO L175 Difference]: Start difference. First operand has 316 places, 244 transitions, 2118 flow. Second operand 12 states and 145 transitions. [2024-06-21 21:27:55,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 268 transitions, 2748 flow [2024-06-21 21:27:55,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 268 transitions, 2652 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:27:55,770 INFO L231 Difference]: Finished difference. Result has 316 places, 241 transitions, 2088 flow [2024-06-21 21:27:55,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2088, PETRI_PLACES=316, PETRI_TRANSITIONS=241} [2024-06-21 21:27:55,770 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 21:27:55,770 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 241 transitions, 2088 flow [2024-06-21 21:27:55,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:55,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:55,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:55,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 21:27:55,771 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:55,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2100671450, now seen corresponding path program 16 times [2024-06-21 21:27:55,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:55,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134533749] [2024-06-21 21:27:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:55,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134533749] [2024-06-21 21:27:57,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134533749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:57,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:57,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:57,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115083746] [2024-06-21 21:27:57,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:57,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:57,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:57,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:57,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:27:57,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:27:57,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 241 transitions, 2088 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:57,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:27:57,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:27:57,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:27:57,779 INFO L124 PetriNetUnfolderBase]: 726/1369 cut-off events. [2024-06-21 21:27:57,779 INFO L125 PetriNetUnfolderBase]: For 336189/336189 co-relation queries the response was YES. [2024-06-21 21:27:57,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10668 conditions, 1369 events. 726/1369 cut-off events. For 336189/336189 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7789 event pairs, 143 based on Foata normal form. 8/1375 useless extension candidates. Maximal degree in co-relation 10522. Up to 1144 conditions per place. [2024-06-21 21:27:57,793 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 221 selfloop transitions, 38 changer transitions 8/269 dead transitions. [2024-06-21 21:27:57,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 269 transitions, 2974 flow [2024-06-21 21:27:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:27:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:27:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 21:27:57,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 21:27:57,794 INFO L175 Difference]: Start difference. First operand has 316 places, 241 transitions, 2088 flow. Second operand 12 states and 146 transitions. [2024-06-21 21:27:57,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 269 transitions, 2974 flow [2024-06-21 21:27:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 269 transitions, 2884 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:27:58,562 INFO L231 Difference]: Finished difference. Result has 314 places, 238 transitions, 2060 flow [2024-06-21 21:27:58,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2060, PETRI_PLACES=314, PETRI_TRANSITIONS=238} [2024-06-21 21:27:58,562 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 21:27:58,563 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 238 transitions, 2060 flow [2024-06-21 21:27:58,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:27:58,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:27:58,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:27:58,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 21:27:58,563 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:27:58,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:27:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2107342774, now seen corresponding path program 12 times [2024-06-21 21:27:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:27:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328938006] [2024-06-21 21:27:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:27:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:27:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:27:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:27:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:27:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328938006] [2024-06-21 21:27:59,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328938006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:27:59,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:27:59,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:27:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957965992] [2024-06-21 21:27:59,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:27:59,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:27:59,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:27:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:27:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:00,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:00,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 238 transitions, 2060 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:00,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:00,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:00,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:00,603 INFO L124 PetriNetUnfolderBase]: 737/1386 cut-off events. [2024-06-21 21:28:00,603 INFO L125 PetriNetUnfolderBase]: For 295615/295615 co-relation queries the response was YES. [2024-06-21 21:28:00,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10805 conditions, 1386 events. 737/1386 cut-off events. For 295615/295615 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7896 event pairs, 171 based on Foata normal form. 2/1386 useless extension candidates. Maximal degree in co-relation 10660. Up to 1285 conditions per place. [2024-06-21 21:28:00,615 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 232 selfloop transitions, 33 changer transitions 0/267 dead transitions. [2024-06-21 21:28:00,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 267 transitions, 2790 flow [2024-06-21 21:28:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 21:28:00,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 21:28:00,616 INFO L175 Difference]: Start difference. First operand has 314 places, 238 transitions, 2060 flow. Second operand 12 states and 135 transitions. [2024-06-21 21:28:00,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 267 transitions, 2790 flow [2024-06-21 21:28:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 267 transitions, 2696 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:28:01,451 INFO L231 Difference]: Finished difference. Result has 315 places, 249 transitions, 2218 flow [2024-06-21 21:28:01,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2218, PETRI_PLACES=315, PETRI_TRANSITIONS=249} [2024-06-21 21:28:01,452 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-21 21:28:01,452 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 249 transitions, 2218 flow [2024-06-21 21:28:01,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:01,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:01,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:01,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 21:28:01,452 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:01,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2107105190, now seen corresponding path program 17 times [2024-06-21 21:28:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:01,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798465222] [2024-06-21 21:28:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:01,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:03,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:03,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798465222] [2024-06-21 21:28:03,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798465222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:03,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:03,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:03,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484325961] [2024-06-21 21:28:03,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:03,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:03,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 249 transitions, 2218 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:03,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:03,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:03,858 INFO L124 PetriNetUnfolderBase]: 724/1363 cut-off events. [2024-06-21 21:28:03,858 INFO L125 PetriNetUnfolderBase]: For 278276/278276 co-relation queries the response was YES. [2024-06-21 21:28:03,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 1363 events. 724/1363 cut-off events. For 278276/278276 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7750 event pairs, 136 based on Foata normal form. 10/1371 useless extension candidates. Maximal degree in co-relation 9472. Up to 1160 conditions per place. [2024-06-21 21:28:03,869 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 214 selfloop transitions, 43 changer transitions 14/273 dead transitions. [2024-06-21 21:28:03,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 273 transitions, 2858 flow [2024-06-21 21:28:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 21:28:03,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 21:28:03,869 INFO L175 Difference]: Start difference. First operand has 315 places, 249 transitions, 2218 flow. Second operand 12 states and 142 transitions. [2024-06-21 21:28:03,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 273 transitions, 2858 flow [2024-06-21 21:28:04,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 273 transitions, 2768 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 21:28:04,583 INFO L231 Difference]: Finished difference. Result has 320 places, 243 transitions, 2162 flow [2024-06-21 21:28:04,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2162, PETRI_PLACES=320, PETRI_TRANSITIONS=243} [2024-06-21 21:28:04,583 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 21:28:04,583 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 243 transitions, 2162 flow [2024-06-21 21:28:04,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:04,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:04,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:04,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 21:28:04,584 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:04,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2107351144, now seen corresponding path program 13 times [2024-06-21 21:28:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087049018] [2024-06-21 21:28:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:04,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:05,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087049018] [2024-06-21 21:28:05,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087049018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:05,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:05,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:05,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657350523] [2024-06-21 21:28:05,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:05,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:06,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:06,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 243 transitions, 2162 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:06,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:06,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:06,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:06,449 INFO L124 PetriNetUnfolderBase]: 699/1320 cut-off events. [2024-06-21 21:28:06,449 INFO L125 PetriNetUnfolderBase]: For 248906/248906 co-relation queries the response was YES. [2024-06-21 21:28:06,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9804 conditions, 1320 events. 699/1320 cut-off events. For 248906/248906 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7470 event pairs, 135 based on Foata normal form. 2/1320 useless extension candidates. Maximal degree in co-relation 9656. Up to 1142 conditions per place. [2024-06-21 21:28:06,463 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 216 selfloop transitions, 46 changer transitions 0/264 dead transitions. [2024-06-21 21:28:06,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 264 transitions, 3050 flow [2024-06-21 21:28:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:28:06,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:28:06,463 INFO L175 Difference]: Start difference. First operand has 320 places, 243 transitions, 2162 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:28:06,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 264 transitions, 3050 flow [2024-06-21 21:28:07,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 264 transitions, 2956 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:28:07,081 INFO L231 Difference]: Finished difference. Result has 316 places, 245 transitions, 2262 flow [2024-06-21 21:28:07,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2262, PETRI_PLACES=316, PETRI_TRANSITIONS=245} [2024-06-21 21:28:07,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 21:28:07,081 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 245 transitions, 2262 flow [2024-06-21 21:28:07,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:07,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:07,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:07,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 21:28:07,082 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:07,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:07,082 INFO L85 PathProgramCache]: Analyzing trace with hash 383521686, now seen corresponding path program 18 times [2024-06-21 21:28:07,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:07,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650578048] [2024-06-21 21:28:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:07,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650578048] [2024-06-21 21:28:08,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650578048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:08,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:08,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:08,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574912709] [2024-06-21 21:28:08,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:08,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:08,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:08,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:08,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 245 transitions, 2262 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:08,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:08,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:08,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:09,098 INFO L124 PetriNetUnfolderBase]: 715/1356 cut-off events. [2024-06-21 21:28:09,099 INFO L125 PetriNetUnfolderBase]: For 291897/291897 co-relation queries the response was YES. [2024-06-21 21:28:09,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9929 conditions, 1356 events. 715/1356 cut-off events. For 291897/291897 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7794 event pairs, 131 based on Foata normal form. 10/1364 useless extension candidates. Maximal degree in co-relation 9782. Up to 1100 conditions per place. [2024-06-21 21:28:09,112 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 201 selfloop transitions, 55 changer transitions 12/270 dead transitions. [2024-06-21 21:28:09,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 270 transitions, 2900 flow [2024-06-21 21:28:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 21:28:09,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 21:28:09,112 INFO L175 Difference]: Start difference. First operand has 316 places, 245 transitions, 2262 flow. Second operand 12 states and 152 transitions. [2024-06-21 21:28:09,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 270 transitions, 2900 flow [2024-06-21 21:28:09,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 270 transitions, 2788 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:28:09,798 INFO L231 Difference]: Finished difference. Result has 321 places, 241 transitions, 2232 flow [2024-06-21 21:28:09,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2232, PETRI_PLACES=321, PETRI_TRANSITIONS=241} [2024-06-21 21:28:09,799 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2024-06-21 21:28:09,799 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 241 transitions, 2232 flow [2024-06-21 21:28:09,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 21:28:09,799 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:09,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash 463755532, now seen corresponding path program 19 times [2024-06-21 21:28:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:09,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996577783] [2024-06-21 21:28:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:11,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:11,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996577783] [2024-06-21 21:28:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996577783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:11,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:11,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:11,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726289143] [2024-06-21 21:28:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:11,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:11,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:11,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 241 transitions, 2232 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:11,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:11,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:11,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:11,953 INFO L124 PetriNetUnfolderBase]: 692/1315 cut-off events. [2024-06-21 21:28:11,953 INFO L125 PetriNetUnfolderBase]: For 271044/271044 co-relation queries the response was YES. [2024-06-21 21:28:11,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9307 conditions, 1315 events. 692/1315 cut-off events. For 271044/271044 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7492 event pairs, 127 based on Foata normal form. 10/1323 useless extension candidates. Maximal degree in co-relation 9158. Up to 1058 conditions per place. [2024-06-21 21:28:11,967 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 201 selfloop transitions, 52 changer transitions 11/266 dead transitions. [2024-06-21 21:28:11,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 266 transitions, 2862 flow [2024-06-21 21:28:11,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 21:28:11,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 21:28:11,968 INFO L175 Difference]: Start difference. First operand has 321 places, 241 transitions, 2232 flow. Second operand 12 states and 150 transitions. [2024-06-21 21:28:11,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 266 transitions, 2862 flow [2024-06-21 21:28:12,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 266 transitions, 2744 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 21:28:12,398 INFO L231 Difference]: Finished difference. Result has 318 places, 238 transitions, 2200 flow [2024-06-21 21:28:12,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2200, PETRI_PLACES=318, PETRI_TRANSITIONS=238} [2024-06-21 21:28:12,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-21 21:28:12,399 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 238 transitions, 2200 flow [2024-06-21 21:28:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:12,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:12,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:12,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 21:28:12,400 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:12,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2013236484, now seen corresponding path program 14 times [2024-06-21 21:28:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:12,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510483623] [2024-06-21 21:28:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:13,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:13,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510483623] [2024-06-21 21:28:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510483623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:13,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:13,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250342994] [2024-06-21 21:28:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:13,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:13,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:13,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:13,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 238 transitions, 2200 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:13,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:13,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:13,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:14,182 INFO L124 PetriNetUnfolderBase]: 679/1296 cut-off events. [2024-06-21 21:28:14,182 INFO L125 PetriNetUnfolderBase]: For 270980/270980 co-relation queries the response was YES. [2024-06-21 21:28:14,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8965 conditions, 1296 events. 679/1296 cut-off events. For 270980/270980 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7390 event pairs, 120 based on Foata normal form. 12/1306 useless extension candidates. Maximal degree in co-relation 8816. Up to 1041 conditions per place. [2024-06-21 21:28:14,194 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 196 selfloop transitions, 55 changer transitions 8/261 dead transitions. [2024-06-21 21:28:14,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 261 transitions, 2814 flow [2024-06-21 21:28:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 21:28:14,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 21:28:14,195 INFO L175 Difference]: Start difference. First operand has 318 places, 238 transitions, 2200 flow. Second operand 11 states and 142 transitions. [2024-06-21 21:28:14,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 261 transitions, 2814 flow [2024-06-21 21:28:14,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 261 transitions, 2682 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 21:28:14,650 INFO L231 Difference]: Finished difference. Result has 315 places, 234 transitions, 2158 flow [2024-06-21 21:28:14,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2158, PETRI_PLACES=315, PETRI_TRANSITIONS=234} [2024-06-21 21:28:14,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-21 21:28:14,651 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 234 transitions, 2158 flow [2024-06-21 21:28:14,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:14,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:14,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:14,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 21:28:14,651 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:14,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2013229540, now seen corresponding path program 20 times [2024-06-21 21:28:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101754389] [2024-06-21 21:28:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:16,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:16,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101754389] [2024-06-21 21:28:16,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101754389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:16,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:16,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880861950] [2024-06-21 21:28:16,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:16,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:16,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:16,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 234 transitions, 2158 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:16,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:16,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:16,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:16,842 INFO L124 PetriNetUnfolderBase]: 669/1282 cut-off events. [2024-06-21 21:28:16,842 INFO L125 PetriNetUnfolderBase]: For 253511/253511 co-relation queries the response was YES. [2024-06-21 21:28:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 1282 events. 669/1282 cut-off events. For 253511/253511 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 7305 event pairs, 122 based on Foata normal form. 10/1290 useless extension candidates. Maximal degree in co-relation 8702. Up to 1035 conditions per place. [2024-06-21 21:28:16,852 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 195 selfloop transitions, 52 changer transitions 9/258 dead transitions. [2024-06-21 21:28:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 258 transitions, 2768 flow [2024-06-21 21:28:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 21:28:16,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 21:28:16,853 INFO L175 Difference]: Start difference. First operand has 315 places, 234 transitions, 2158 flow. Second operand 12 states and 149 transitions. [2024-06-21 21:28:16,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 258 transitions, 2768 flow [2024-06-21 21:28:17,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 258 transitions, 2614 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 21:28:17,275 INFO L231 Difference]: Finished difference. Result has 315 places, 231 transitions, 2095 flow [2024-06-21 21:28:17,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2095, PETRI_PLACES=315, PETRI_TRANSITIONS=231} [2024-06-21 21:28:17,275 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2024-06-21 21:28:17,275 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 231 transitions, 2095 flow [2024-06-21 21:28:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:17,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:17,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:17,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 21:28:17,276 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:17,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:17,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2008467940, now seen corresponding path program 21 times [2024-06-21 21:28:17,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:17,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701220163] [2024-06-21 21:28:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:17,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:18,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:18,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701220163] [2024-06-21 21:28:18,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701220163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:18,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:18,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830114922] [2024-06-21 21:28:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:18,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:18,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:18,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:18,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:18,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 231 transitions, 2095 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:18,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:18,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:18,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:19,024 INFO L124 PetriNetUnfolderBase]: 677/1306 cut-off events. [2024-06-21 21:28:19,024 INFO L125 PetriNetUnfolderBase]: For 293381/293381 co-relation queries the response was YES. [2024-06-21 21:28:19,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9752 conditions, 1306 events. 677/1306 cut-off events. For 293381/293381 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7482 event pairs, 132 based on Foata normal form. 8/1312 useless extension candidates. Maximal degree in co-relation 9604. Up to 988 conditions per place. [2024-06-21 21:28:19,037 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 191 selfloop transitions, 55 changer transitions 10/258 dead transitions. [2024-06-21 21:28:19,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 258 transitions, 2943 flow [2024-06-21 21:28:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 21:28:19,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 21:28:19,038 INFO L175 Difference]: Start difference. First operand has 315 places, 231 transitions, 2095 flow. Second operand 12 states and 150 transitions. [2024-06-21 21:28:19,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 258 transitions, 2943 flow [2024-06-21 21:28:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 258 transitions, 2829 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:28:19,887 INFO L231 Difference]: Finished difference. Result has 313 places, 228 transitions, 2081 flow [2024-06-21 21:28:19,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2081, PETRI_PLACES=313, PETRI_TRANSITIONS=228} [2024-06-21 21:28:19,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 21:28:19,887 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 228 transitions, 2081 flow [2024-06-21 21:28:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:19,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:19,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:19,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 21:28:19,887 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:19,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:19,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2013051910, now seen corresponding path program 22 times [2024-06-21 21:28:19,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322079329] [2024-06-21 21:28:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322079329] [2024-06-21 21:28:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322079329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:21,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:21,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:21,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142860643] [2024-06-21 21:28:21,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:21,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:21,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:21,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:21,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 228 transitions, 2081 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:21,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:21,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:21,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:21,745 INFO L124 PetriNetUnfolderBase]: 667/1288 cut-off events. [2024-06-21 21:28:21,745 INFO L125 PetriNetUnfolderBase]: For 288159/288159 co-relation queries the response was YES. [2024-06-21 21:28:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9659 conditions, 1288 events. 667/1288 cut-off events. For 288159/288159 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7384 event pairs, 132 based on Foata normal form. 8/1294 useless extension candidates. Maximal degree in co-relation 9512. Up to 1050 conditions per place. [2024-06-21 21:28:21,758 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 185 selfloop transitions, 53 changer transitions 11/251 dead transitions. [2024-06-21 21:28:21,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 251 transitions, 2663 flow [2024-06-21 21:28:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:21,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 21:28:21,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 21:28:21,758 INFO L175 Difference]: Start difference. First operand has 313 places, 228 transitions, 2081 flow. Second operand 12 states and 146 transitions. [2024-06-21 21:28:21,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 251 transitions, 2663 flow [2024-06-21 21:28:22,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 251 transitions, 2549 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:28:22,403 INFO L231 Difference]: Finished difference. Result has 310 places, 225 transitions, 2055 flow [2024-06-21 21:28:22,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2055, PETRI_PLACES=310, PETRI_TRANSITIONS=225} [2024-06-21 21:28:22,403 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 280 predicate places. [2024-06-21 21:28:22,403 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 225 transitions, 2055 flow [2024-06-21 21:28:22,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:22,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:22,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 21:28:22,403 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:22,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash 212814606, now seen corresponding path program 23 times [2024-06-21 21:28:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:22,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207409461] [2024-06-21 21:28:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207409461] [2024-06-21 21:28:23,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207409461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:23,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:23,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:23,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541749061] [2024-06-21 21:28:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:23,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:23,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:24,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:24,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 225 transitions, 2055 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:24,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:24,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:24,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:24,533 INFO L124 PetriNetUnfolderBase]: 638/1229 cut-off events. [2024-06-21 21:28:24,533 INFO L125 PetriNetUnfolderBase]: For 232575/232575 co-relation queries the response was YES. [2024-06-21 21:28:24,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8503 conditions, 1229 events. 638/1229 cut-off events. For 232575/232575 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6935 event pairs, 116 based on Foata normal form. 8/1235 useless extension candidates. Maximal degree in co-relation 8358. Up to 1003 conditions per place. [2024-06-21 21:28:24,545 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 187 selfloop transitions, 45 changer transitions 13/247 dead transitions. [2024-06-21 21:28:24,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 247 transitions, 2625 flow [2024-06-21 21:28:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:28:24,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:28:24,546 INFO L175 Difference]: Start difference. First operand has 310 places, 225 transitions, 2055 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:28:24,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 247 transitions, 2625 flow [2024-06-21 21:28:25,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 247 transitions, 2515 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:28:25,344 INFO L231 Difference]: Finished difference. Result has 307 places, 221 transitions, 2012 flow [2024-06-21 21:28:25,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2012, PETRI_PLACES=307, PETRI_TRANSITIONS=221} [2024-06-21 21:28:25,345 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 21:28:25,345 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 221 transitions, 2012 flow [2024-06-21 21:28:25,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:25,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:25,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:25,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 21:28:25,345 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:25,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1112075384, now seen corresponding path program 15 times [2024-06-21 21:28:25,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:25,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851244559] [2024-06-21 21:28:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:25,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851244559] [2024-06-21 21:28:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851244559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:26,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:26,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:26,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314089586] [2024-06-21 21:28:26,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:26,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:26,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:26,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:26,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:26,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 221 transitions, 2012 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:26,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:26,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:27,230 INFO L124 PetriNetUnfolderBase]: 622/1193 cut-off events. [2024-06-21 21:28:27,230 INFO L125 PetriNetUnfolderBase]: For 196384/196384 co-relation queries the response was YES. [2024-06-21 21:28:27,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8396 conditions, 1193 events. 622/1193 cut-off events. For 196384/196384 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6673 event pairs, 138 based on Foata normal form. 2/1193 useless extension candidates. Maximal degree in co-relation 8252. Up to 1109 conditions per place. [2024-06-21 21:28:27,241 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 207 selfloop transitions, 29 changer transitions 0/238 dead transitions. [2024-06-21 21:28:27,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 238 transitions, 2574 flow [2024-06-21 21:28:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:28:27,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:28:27,242 INFO L175 Difference]: Start difference. First operand has 307 places, 221 transitions, 2012 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:28:27,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 238 transitions, 2574 flow [2024-06-21 21:28:27,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 238 transitions, 2480 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:28:27,940 INFO L231 Difference]: Finished difference. Result has 301 places, 222 transitions, 2028 flow [2024-06-21 21:28:27,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2028, PETRI_PLACES=301, PETRI_TRANSITIONS=222} [2024-06-21 21:28:27,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 21:28:27,940 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 222 transitions, 2028 flow [2024-06-21 21:28:27,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:27,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:27,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 21:28:27,941 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:27,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1015192826, now seen corresponding path program 24 times [2024-06-21 21:28:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233984666] [2024-06-21 21:28:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:29,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233984666] [2024-06-21 21:28:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233984666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076610710] [2024-06-21 21:28:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:29,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:29,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:29,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 222 transitions, 2028 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:29,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:29,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:29,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:30,174 INFO L124 PetriNetUnfolderBase]: 638/1229 cut-off events. [2024-06-21 21:28:30,174 INFO L125 PetriNetUnfolderBase]: For 235731/235731 co-relation queries the response was YES. [2024-06-21 21:28:30,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 1229 events. 638/1229 cut-off events. For 235731/235731 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6941 event pairs, 140 based on Foata normal form. 10/1237 useless extension candidates. Maximal degree in co-relation 8338. Up to 1064 conditions per place. [2024-06-21 21:28:30,186 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 201 selfloop transitions, 29 changer transitions 12/244 dead transitions. [2024-06-21 21:28:30,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 244 transitions, 2604 flow [2024-06-21 21:28:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:28:30,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:28:30,187 INFO L175 Difference]: Start difference. First operand has 301 places, 222 transitions, 2028 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:28:30,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 244 transitions, 2604 flow [2024-06-21 21:28:30,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 244 transitions, 2504 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 21:28:30,980 INFO L231 Difference]: Finished difference. Result has 304 places, 216 transitions, 1953 flow [2024-06-21 21:28:30,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1953, PETRI_PLACES=304, PETRI_TRANSITIONS=216} [2024-06-21 21:28:30,981 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2024-06-21 21:28:30,981 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 216 transitions, 1953 flow [2024-06-21 21:28:30,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:30,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:30,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:30,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 21:28:30,981 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:30,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash -200634500, now seen corresponding path program 25 times [2024-06-21 21:28:30,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:30,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382320697] [2024-06-21 21:28:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:32,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:32,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382320697] [2024-06-21 21:28:32,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382320697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:32,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:32,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:32,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849722276] [2024-06-21 21:28:32,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:32,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:32,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:32,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 216 transitions, 1953 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:32,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:32,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:32,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:33,250 INFO L124 PetriNetUnfolderBase]: 645/1254 cut-off events. [2024-06-21 21:28:33,250 INFO L125 PetriNetUnfolderBase]: For 283538/283538 co-relation queries the response was YES. [2024-06-21 21:28:33,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9586 conditions, 1254 events. 645/1254 cut-off events. For 283538/283538 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7120 event pairs, 147 based on Foata normal form. 8/1260 useless extension candidates. Maximal degree in co-relation 9442. Up to 1022 conditions per place. [2024-06-21 21:28:33,262 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 205 selfloop transitions, 27 changer transitions 8/242 dead transitions. [2024-06-21 21:28:33,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 242 transitions, 2769 flow [2024-06-21 21:28:33,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:28:33,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:28:33,263 INFO L175 Difference]: Start difference. First operand has 304 places, 216 transitions, 1953 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:28:33,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 242 transitions, 2769 flow [2024-06-21 21:28:34,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 242 transitions, 2699 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 21:28:34,135 INFO L231 Difference]: Finished difference. Result has 301 places, 213 transitions, 1912 flow [2024-06-21 21:28:34,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1912, PETRI_PLACES=301, PETRI_TRANSITIONS=213} [2024-06-21 21:28:34,136 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 21:28:34,136 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 213 transitions, 1912 flow [2024-06-21 21:28:34,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:34,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:34,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:34,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 21:28:34,136 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:34,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1732070902, now seen corresponding path program 16 times [2024-06-21 21:28:34,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:34,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274019141] [2024-06-21 21:28:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:35,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:35,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274019141] [2024-06-21 21:28:35,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274019141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:35,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:35,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687160843] [2024-06-21 21:28:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:35,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:35,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:35,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 213 transitions, 1912 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:35,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:35,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:35,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:35,969 INFO L124 PetriNetUnfolderBase]: 610/1181 cut-off events. [2024-06-21 21:28:35,969 INFO L125 PetriNetUnfolderBase]: For 247349/247349 co-relation queries the response was YES. [2024-06-21 21:28:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9309 conditions, 1181 events. 610/1181 cut-off events. For 247349/247349 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6586 event pairs, 149 based on Foata normal form. 2/1181 useless extension candidates. Maximal degree in co-relation 9166. Up to 1097 conditions per place. [2024-06-21 21:28:35,982 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 202 selfloop transitions, 26 changer transitions 0/230 dead transitions. [2024-06-21 21:28:35,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 230 transitions, 2460 flow [2024-06-21 21:28:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 21:28:35,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:28:35,983 INFO L175 Difference]: Start difference. First operand has 301 places, 213 transitions, 1912 flow. Second operand 11 states and 124 transitions. [2024-06-21 21:28:35,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 230 transitions, 2460 flow [2024-06-21 21:28:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 230 transitions, 2369 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 21:28:36,970 INFO L231 Difference]: Finished difference. Result has 297 places, 214 transitions, 1927 flow [2024-06-21 21:28:36,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1927, PETRI_PLACES=297, PETRI_TRANSITIONS=214} [2024-06-21 21:28:36,970 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-21 21:28:36,970 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 214 transitions, 1927 flow [2024-06-21 21:28:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:36,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:36,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:36,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 21:28:36,971 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:36,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1911117590, now seen corresponding path program 17 times [2024-06-21 21:28:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918665812] [2024-06-21 21:28:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918665812] [2024-06-21 21:28:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918665812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014266625] [2024-06-21 21:28:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:38,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:38,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:38,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:38,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:38,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 214 transitions, 1927 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:38,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:38,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:38,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:38,948 INFO L124 PetriNetUnfolderBase]: 614/1189 cut-off events. [2024-06-21 21:28:38,948 INFO L125 PetriNetUnfolderBase]: For 243646/243646 co-relation queries the response was YES. [2024-06-21 21:28:38,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9335 conditions, 1189 events. 614/1189 cut-off events. For 243646/243646 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6671 event pairs, 141 based on Foata normal form. 2/1189 useless extension candidates. Maximal degree in co-relation 9194. Up to 1030 conditions per place. [2024-06-21 21:28:38,958 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 45 changer transitions 0/230 dead transitions. [2024-06-21 21:28:38,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 230 transitions, 2473 flow [2024-06-21 21:28:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:28:38,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:28:38,959 INFO L175 Difference]: Start difference. First operand has 297 places, 214 transitions, 1927 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:28:38,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 230 transitions, 2473 flow [2024-06-21 21:28:39,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 230 transitions, 2377 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 21:28:39,780 INFO L231 Difference]: Finished difference. Result has 299 places, 215 transitions, 1977 flow [2024-06-21 21:28:39,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1977, PETRI_PLACES=299, PETRI_TRANSITIONS=215} [2024-06-21 21:28:39,781 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-21 21:28:39,781 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 215 transitions, 1977 flow [2024-06-21 21:28:39,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:39,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:39,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:39,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 21:28:39,781 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:39,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:39,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1569122120, now seen corresponding path program 18 times [2024-06-21 21:28:39,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:39,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205291031] [2024-06-21 21:28:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:39,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:41,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:41,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205291031] [2024-06-21 21:28:41,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205291031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:41,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535929856] [2024-06-21 21:28:41,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:41,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:41,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:41,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 215 transitions, 1977 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:41,685 INFO L124 PetriNetUnfolderBase]: 625/1210 cut-off events. [2024-06-21 21:28:41,685 INFO L125 PetriNetUnfolderBase]: For 261089/261089 co-relation queries the response was YES. [2024-06-21 21:28:41,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9850 conditions, 1210 events. 625/1210 cut-off events. For 261089/261089 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6842 event pairs, 142 based on Foata normal form. 2/1210 useless extension candidates. Maximal degree in co-relation 9708. Up to 1026 conditions per place. [2024-06-21 21:28:41,697 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-06-21 21:28:41,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 233 transitions, 2795 flow [2024-06-21 21:28:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 21:28:41,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 21:28:41,698 INFO L175 Difference]: Start difference. First operand has 299 places, 215 transitions, 1977 flow. Second operand 11 states and 127 transitions. [2024-06-21 21:28:41,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 233 transitions, 2795 flow [2024-06-21 21:28:42,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 233 transitions, 2659 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 21:28:42,694 INFO L231 Difference]: Finished difference. Result has 301 places, 217 transitions, 2045 flow [2024-06-21 21:28:42,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2045, PETRI_PLACES=301, PETRI_TRANSITIONS=217} [2024-06-21 21:28:42,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 21:28:42,695 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 217 transitions, 2045 flow [2024-06-21 21:28:42,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:42,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:42,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:42,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 21:28:42,695 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:42,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash 35725434, now seen corresponding path program 19 times [2024-06-21 21:28:42,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:42,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104465537] [2024-06-21 21:28:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:42,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:43,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:43,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104465537] [2024-06-21 21:28:43,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104465537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:43,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:43,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:43,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090158508] [2024-06-21 21:28:43,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:43,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:44,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:44,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 217 transitions, 2045 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:44,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:44,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:44,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:44,588 INFO L124 PetriNetUnfolderBase]: 637/1238 cut-off events. [2024-06-21 21:28:44,588 INFO L125 PetriNetUnfolderBase]: For 296197/296197 co-relation queries the response was YES. [2024-06-21 21:28:44,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10001 conditions, 1238 events. 637/1238 cut-off events. For 296197/296197 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7039 event pairs, 164 based on Foata normal form. 8/1244 useless extension candidates. Maximal degree in co-relation 9858. Up to 1156 conditions per place. [2024-06-21 21:28:44,601 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 206 selfloop transitions, 18 changer transitions 9/235 dead transitions. [2024-06-21 21:28:44,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 235 transitions, 2619 flow [2024-06-21 21:28:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:28:44,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:28:44,602 INFO L175 Difference]: Start difference. First operand has 301 places, 217 transitions, 2045 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:28:44,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 235 transitions, 2619 flow [2024-06-21 21:28:45,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 235 transitions, 2502 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 21:28:45,639 INFO L231 Difference]: Finished difference. Result has 305 places, 215 transitions, 1946 flow [2024-06-21 21:28:45,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1946, PETRI_PLACES=305, PETRI_TRANSITIONS=215} [2024-06-21 21:28:45,639 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 21:28:45,639 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 215 transitions, 1946 flow [2024-06-21 21:28:45,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:45,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:45,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:45,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 21:28:45,640 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:45,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash 8429738, now seen corresponding path program 20 times [2024-06-21 21:28:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70714167] [2024-06-21 21:28:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:47,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70714167] [2024-06-21 21:28:47,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70714167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:47,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:47,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:47,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833231410] [2024-06-21 21:28:47,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:47,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:47,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 215 transitions, 1946 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:47,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:47,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:47,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:47,800 INFO L124 PetriNetUnfolderBase]: 639/1244 cut-off events. [2024-06-21 21:28:47,800 INFO L125 PetriNetUnfolderBase]: For 325991/325991 co-relation queries the response was YES. [2024-06-21 21:28:47,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9930 conditions, 1244 events. 639/1244 cut-off events. For 325991/325991 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7096 event pairs, 152 based on Foata normal form. 12/1254 useless extension candidates. Maximal degree in co-relation 9785. Up to 971 conditions per place. [2024-06-21 21:28:47,814 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 172 selfloop transitions, 55 changer transitions 7/236 dead transitions. [2024-06-21 21:28:47,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 236 transitions, 2542 flow [2024-06-21 21:28:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:28:47,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:28:47,815 INFO L175 Difference]: Start difference. First operand has 305 places, 215 transitions, 1946 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:28:47,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 236 transitions, 2542 flow [2024-06-21 21:28:48,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 236 transitions, 2504 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:28:48,790 INFO L231 Difference]: Finished difference. Result has 305 places, 213 transitions, 2048 flow [2024-06-21 21:28:48,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2048, PETRI_PLACES=305, PETRI_TRANSITIONS=213} [2024-06-21 21:28:48,790 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 21:28:48,791 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 213 transitions, 2048 flow [2024-06-21 21:28:48,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:48,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:48,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:48,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 21:28:48,791 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:48,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1568876166, now seen corresponding path program 26 times [2024-06-21 21:28:48,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:48,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115720087] [2024-06-21 21:28:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:48,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:50,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:50,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115720087] [2024-06-21 21:28:50,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115720087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:50,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:50,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:50,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580704288] [2024-06-21 21:28:50,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:50,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:50,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:50,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:50,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:50,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:50,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 213 transitions, 2048 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:50,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:50,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:50,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:51,143 INFO L124 PetriNetUnfolderBase]: 634/1237 cut-off events. [2024-06-21 21:28:51,144 INFO L125 PetriNetUnfolderBase]: For 314563/314563 co-relation queries the response was YES. [2024-06-21 21:28:51,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10002 conditions, 1237 events. 634/1237 cut-off events. For 314563/314563 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7062 event pairs, 146 based on Foata normal form. 10/1245 useless extension candidates. Maximal degree in co-relation 9857. Up to 937 conditions per place. [2024-06-21 21:28:51,157 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 164 selfloop transitions, 63 changer transitions 9/238 dead transitions. [2024-06-21 21:28:51,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 238 transitions, 2623 flow [2024-06-21 21:28:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 21:28:51,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 21:28:51,158 INFO L175 Difference]: Start difference. First operand has 305 places, 213 transitions, 2048 flow. Second operand 12 states and 146 transitions. [2024-06-21 21:28:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 238 transitions, 2623 flow [2024-06-21 21:28:52,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 238 transitions, 2473 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 21:28:52,013 INFO L231 Difference]: Finished difference. Result has 307 places, 212 transitions, 2054 flow [2024-06-21 21:28:52,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2054, PETRI_PLACES=307, PETRI_TRANSITIONS=212} [2024-06-21 21:28:52,013 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2024-06-21 21:28:52,013 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 212 transitions, 2054 flow [2024-06-21 21:28:52,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:52,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:52,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:52,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 21:28:52,013 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:52,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1431422442, now seen corresponding path program 27 times [2024-06-21 21:28:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798246033] [2024-06-21 21:28:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:53,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:53,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798246033] [2024-06-21 21:28:53,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798246033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:53,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:53,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678419705] [2024-06-21 21:28:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:53,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:53,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:53,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:53,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 212 transitions, 2054 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:53,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:53,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:53,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:54,011 INFO L124 PetriNetUnfolderBase]: 595/1164 cut-off events. [2024-06-21 21:28:54,011 INFO L125 PetriNetUnfolderBase]: For 256659/256659 co-relation queries the response was YES. [2024-06-21 21:28:54,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8665 conditions, 1164 events. 595/1164 cut-off events. For 256659/256659 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6582 event pairs, 139 based on Foata normal form. 10/1172 useless extension candidates. Maximal degree in co-relation 8519. Up to 1038 conditions per place. [2024-06-21 21:28:54,023 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 199 selfloop transitions, 24 changer transitions 9/234 dead transitions. [2024-06-21 21:28:54,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 234 transitions, 2608 flow [2024-06-21 21:28:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 21:28:54,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:28:54,023 INFO L175 Difference]: Start difference. First operand has 307 places, 212 transitions, 2054 flow. Second operand 12 states and 138 transitions. [2024-06-21 21:28:54,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 234 transitions, 2608 flow [2024-06-21 21:28:54,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 234 transitions, 2507 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:28:54,768 INFO L231 Difference]: Finished difference. Result has 306 places, 209 transitions, 1981 flow [2024-06-21 21:28:54,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1981, PETRI_PLACES=306, PETRI_TRANSITIONS=209} [2024-06-21 21:28:54,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-21 21:28:54,769 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 209 transitions, 1981 flow [2024-06-21 21:28:54,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:54,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:54,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:54,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 21:28:54,769 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:54,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1140134330, now seen corresponding path program 28 times [2024-06-21 21:28:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102699867] [2024-06-21 21:28:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102699867] [2024-06-21 21:28:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102699867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:56,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674991988] [2024-06-21 21:28:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:56,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:56,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 209 transitions, 1981 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:56,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:56,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:56,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:56,813 INFO L124 PetriNetUnfolderBase]: 585/1150 cut-off events. [2024-06-21 21:28:56,813 INFO L125 PetriNetUnfolderBase]: For 251850/251850 co-relation queries the response was YES. [2024-06-21 21:28:56,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8478 conditions, 1150 events. 585/1150 cut-off events. For 251850/251850 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6511 event pairs, 137 based on Foata normal form. 10/1158 useless extension candidates. Maximal degree in co-relation 8333. Up to 899 conditions per place. [2024-06-21 21:28:56,824 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 172 selfloop transitions, 48 changer transitions 9/231 dead transitions. [2024-06-21 21:28:56,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 231 transitions, 2529 flow [2024-06-21 21:28:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:28:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:28:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 21:28:56,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 21:28:56,833 INFO L175 Difference]: Start difference. First operand has 306 places, 209 transitions, 1981 flow. Second operand 12 states and 145 transitions. [2024-06-21 21:28:56,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 231 transitions, 2529 flow [2024-06-21 21:28:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 231 transitions, 2475 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:28:57,614 INFO L231 Difference]: Finished difference. Result has 303 places, 206 transitions, 2009 flow [2024-06-21 21:28:57,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2009, PETRI_PLACES=303, PETRI_TRANSITIONS=206} [2024-06-21 21:28:57,614 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-21 21:28:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 206 transitions, 2009 flow [2024-06-21 21:28:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:57,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:57,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:57,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 21:28:57,615 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:57,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1201487878, now seen corresponding path program 21 times [2024-06-21 21:28:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:57,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045570662] [2024-06-21 21:28:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:28:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:28:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:28:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045570662] [2024-06-21 21:28:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045570662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:28:58,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:28:58,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:28:58,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725402143] [2024-06-21 21:28:58,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:28:58,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:28:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:28:58,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:28:58,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:28:58,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:28:58,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 206 transitions, 2009 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:58,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:28:58,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:28:58,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:28:59,320 INFO L124 PetriNetUnfolderBase]: 563/1108 cut-off events. [2024-06-21 21:28:59,320 INFO L125 PetriNetUnfolderBase]: For 205005/205005 co-relation queries the response was YES. [2024-06-21 21:28:59,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8427 conditions, 1108 events. 563/1108 cut-off events. For 205005/205005 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6241 event pairs, 133 based on Foata normal form. 2/1108 useless extension candidates. Maximal degree in co-relation 8283. Up to 1041 conditions per place. [2024-06-21 21:28:59,330 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 197 selfloop transitions, 23 changer transitions 0/222 dead transitions. [2024-06-21 21:28:59,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 222 transitions, 2541 flow [2024-06-21 21:28:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:28:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:28:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 21:28:59,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 21:28:59,331 INFO L175 Difference]: Start difference. First operand has 303 places, 206 transitions, 2009 flow. Second operand 11 states and 120 transitions. [2024-06-21 21:28:59,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 222 transitions, 2541 flow [2024-06-21 21:28:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 222 transitions, 2439 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:28:59,956 INFO L231 Difference]: Finished difference. Result has 300 places, 207 transitions, 2013 flow [2024-06-21 21:28:59,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2013, PETRI_PLACES=300, PETRI_TRANSITIONS=207} [2024-06-21 21:28:59,956 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-06-21 21:28:59,956 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 207 transitions, 2013 flow [2024-06-21 21:28:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:28:59,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:28:59,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:28:59,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 21:28:59,957 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:28:59,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:28:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -778713852, now seen corresponding path program 22 times [2024-06-21 21:28:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:28:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324210251] [2024-06-21 21:28:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:28:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:28:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:01,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:01,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324210251] [2024-06-21 21:29:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324210251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:01,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699678701] [2024-06-21 21:29:01,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:01,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:01,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:01,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:01,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:01,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 207 transitions, 2013 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:01,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:01,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:01,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:01,839 INFO L124 PetriNetUnfolderBase]: 575/1136 cut-off events. [2024-06-21 21:29:01,839 INFO L125 PetriNetUnfolderBase]: For 231239/231239 co-relation queries the response was YES. [2024-06-21 21:29:01,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 1136 events. 575/1136 cut-off events. For 231239/231239 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6448 event pairs, 133 based on Foata normal form. 8/1142 useless extension candidates. Maximal degree in co-relation 8381. Up to 1045 conditions per place. [2024-06-21 21:29:01,850 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 192 selfloop transitions, 19 changer transitions 12/225 dead transitions. [2024-06-21 21:29:01,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 225 transitions, 2565 flow [2024-06-21 21:29:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:29:01,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:29:01,851 INFO L175 Difference]: Start difference. First operand has 300 places, 207 transitions, 2013 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:29:01,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 225 transitions, 2565 flow [2024-06-21 21:29:02,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 225 transitions, 2469 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:02,536 INFO L231 Difference]: Finished difference. Result has 302 places, 204 transitions, 1939 flow [2024-06-21 21:29:02,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=302, PETRI_TRANSITIONS=204} [2024-06-21 21:29:02,536 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-21 21:29:02,536 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 204 transitions, 1939 flow [2024-06-21 21:29:02,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:02,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:02,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:02,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 21:29:02,537 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:02,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1431176488, now seen corresponding path program 23 times [2024-06-21 21:29:02,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:02,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651751581] [2024-06-21 21:29:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:02,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:03,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651751581] [2024-06-21 21:29:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651751581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:03,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230214493] [2024-06-21 21:29:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:03,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:03,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 204 transitions, 1939 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:03,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:03,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:03,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:04,338 INFO L124 PetriNetUnfolderBase]: 557/1098 cut-off events. [2024-06-21 21:29:04,338 INFO L125 PetriNetUnfolderBase]: For 205031/205031 co-relation queries the response was YES. [2024-06-21 21:29:04,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8329 conditions, 1098 events. 557/1098 cut-off events. For 205031/205031 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6170 event pairs, 135 based on Foata normal form. 2/1098 useless extension candidates. Maximal degree in co-relation 8185. Up to 1002 conditions per place. [2024-06-21 21:29:04,348 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 194 selfloop transitions, 25 changer transitions 0/221 dead transitions. [2024-06-21 21:29:04,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 221 transitions, 2475 flow [2024-06-21 21:29:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:29:04,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:29:04,349 INFO L175 Difference]: Start difference. First operand has 302 places, 204 transitions, 1939 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:29:04,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 221 transitions, 2475 flow [2024-06-21 21:29:05,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 221 transitions, 2431 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:05,079 INFO L231 Difference]: Finished difference. Result has 298 places, 205 transitions, 2007 flow [2024-06-21 21:29:05,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2007, PETRI_PLACES=298, PETRI_TRANSITIONS=205} [2024-06-21 21:29:05,080 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 268 predicate places. [2024-06-21 21:29:05,080 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 205 transitions, 2007 flow [2024-06-21 21:29:05,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:05,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:05,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:05,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 21:29:05,080 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:05,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1562442426, now seen corresponding path program 29 times [2024-06-21 21:29:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:05,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206322251] [2024-06-21 21:29:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:05,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:06,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:06,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206322251] [2024-06-21 21:29:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206322251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:06,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:06,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670507657] [2024-06-21 21:29:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:06,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:06,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:06,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:06,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:06,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:06,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 205 transitions, 2007 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:06,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:06,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:06,981 INFO L124 PetriNetUnfolderBase]: 584/1159 cut-off events. [2024-06-21 21:29:06,982 INFO L125 PetriNetUnfolderBase]: For 260587/260587 co-relation queries the response was YES. [2024-06-21 21:29:06,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9107 conditions, 1159 events. 584/1159 cut-off events. For 260587/260587 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6607 event pairs, 142 based on Foata normal form. 8/1165 useless extension candidates. Maximal degree in co-relation 8965. Up to 920 conditions per place. [2024-06-21 21:29:06,993 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 181 selfloop transitions, 36 changer transitions 9/228 dead transitions. [2024-06-21 21:29:06,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 228 transitions, 2755 flow [2024-06-21 21:29:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 21:29:06,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:29:06,994 INFO L175 Difference]: Start difference. First operand has 298 places, 205 transitions, 2007 flow. Second operand 12 states and 141 transitions. [2024-06-21 21:29:06,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 228 transitions, 2755 flow [2024-06-21 21:29:07,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 228 transitions, 2653 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:07,877 INFO L231 Difference]: Finished difference. Result has 301 places, 202 transitions, 1957 flow [2024-06-21 21:29:07,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1957, PETRI_PLACES=301, PETRI_TRANSITIONS=202} [2024-06-21 21:29:07,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 21:29:07,877 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 202 transitions, 1957 flow [2024-06-21 21:29:07,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:07,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:07,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:07,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 21:29:07,878 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:07,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1396393220, now seen corresponding path program 24 times [2024-06-21 21:29:07,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:07,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467472508] [2024-06-21 21:29:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:07,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:09,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467472508] [2024-06-21 21:29:09,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467472508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:09,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:09,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:09,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048914549] [2024-06-21 21:29:09,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:09,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:09,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:09,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:09,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 202 transitions, 1957 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:09,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:09,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:09,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:09,583 INFO L124 PetriNetUnfolderBase]: 562/1113 cut-off events. [2024-06-21 21:29:09,583 INFO L125 PetriNetUnfolderBase]: For 221539/221539 co-relation queries the response was YES. [2024-06-21 21:29:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8656 conditions, 1113 events. 562/1113 cut-off events. For 221539/221539 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6249 event pairs, 137 based on Foata normal form. 2/1113 useless extension candidates. Maximal degree in co-relation 8513. Up to 962 conditions per place. [2024-06-21 21:29:09,594 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 173 selfloop transitions, 42 changer transitions 0/217 dead transitions. [2024-06-21 21:29:09,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 217 transitions, 2427 flow [2024-06-21 21:29:09,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:09,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:29:09,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:29:09,595 INFO L175 Difference]: Start difference. First operand has 301 places, 202 transitions, 1957 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:29:09,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 217 transitions, 2427 flow [2024-06-21 21:29:10,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 217 transitions, 2315 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:10,337 INFO L231 Difference]: Finished difference. Result has 298 places, 202 transitions, 1933 flow [2024-06-21 21:29:10,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1933, PETRI_PLACES=298, PETRI_TRANSITIONS=202} [2024-06-21 21:29:10,338 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 268 predicate places. [2024-06-21 21:29:10,338 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 202 transitions, 1933 flow [2024-06-21 21:29:10,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:10,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:10,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:10,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 21:29:10,338 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:10,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:10,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1391744646, now seen corresponding path program 30 times [2024-06-21 21:29:10,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:10,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17772989] [2024-06-21 21:29:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:10,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17772989] [2024-06-21 21:29:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17772989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:11,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686943797] [2024-06-21 21:29:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:11,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:11,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 202 transitions, 1933 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:11,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:11,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:11,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:12,116 INFO L124 PetriNetUnfolderBase]: 587/1164 cut-off events. [2024-06-21 21:29:12,116 INFO L125 PetriNetUnfolderBase]: For 258377/258377 co-relation queries the response was YES. [2024-06-21 21:29:12,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8765 conditions, 1164 events. 587/1164 cut-off events. For 258377/258377 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6619 event pairs, 135 based on Foata normal form. 10/1172 useless extension candidates. Maximal degree in co-relation 8623. Up to 875 conditions per place. [2024-06-21 21:29:12,128 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 143 selfloop transitions, 71 changer transitions 11/227 dead transitions. [2024-06-21 21:29:12,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 227 transitions, 2497 flow [2024-06-21 21:29:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 21:29:12,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 21:29:12,128 INFO L175 Difference]: Start difference. First operand has 298 places, 202 transitions, 1933 flow. Second operand 12 states and 142 transitions. [2024-06-21 21:29:12,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 227 transitions, 2497 flow [2024-06-21 21:29:12,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 227 transitions, 2403 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:12,906 INFO L231 Difference]: Finished difference. Result has 301 places, 203 transitions, 1994 flow [2024-06-21 21:29:12,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1839, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1994, PETRI_PLACES=301, PETRI_TRANSITIONS=203} [2024-06-21 21:29:12,906 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 21:29:12,906 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 203 transitions, 1994 flow [2024-06-21 21:29:12,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:12,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:12,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:12,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 21:29:12,906 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:12,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:12,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1391739996, now seen corresponding path program 31 times [2024-06-21 21:29:12,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:12,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134199799] [2024-06-21 21:29:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:14,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:14,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134199799] [2024-06-21 21:29:14,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134199799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:14,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:14,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720601525] [2024-06-21 21:29:14,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:14,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:14,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:14,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:14,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 203 transitions, 1994 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:14,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:14,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:14,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:15,010 INFO L124 PetriNetUnfolderBase]: 579/1152 cut-off events. [2024-06-21 21:29:15,010 INFO L125 PetriNetUnfolderBase]: For 252516/252516 co-relation queries the response was YES. [2024-06-21 21:29:15,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8805 conditions, 1152 events. 579/1152 cut-off events. For 252516/252516 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6566 event pairs, 133 based on Foata normal form. 8/1158 useless extension candidates. Maximal degree in co-relation 8661. Up to 921 conditions per place. [2024-06-21 21:29:15,019 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 159 selfloop transitions, 52 changer transitions 11/224 dead transitions. [2024-06-21 21:29:15,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 224 transitions, 2514 flow [2024-06-21 21:29:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 21:29:15,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 21:29:15,020 INFO L175 Difference]: Start difference. First operand has 301 places, 203 transitions, 1994 flow. Second operand 12 states and 137 transitions. [2024-06-21 21:29:15,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 224 transitions, 2514 flow [2024-06-21 21:29:15,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 224 transitions, 2367 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:15,853 INFO L231 Difference]: Finished difference. Result has 302 places, 201 transitions, 1935 flow [2024-06-21 21:29:15,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1935, PETRI_PLACES=302, PETRI_TRANSITIONS=201} [2024-06-21 21:29:15,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-21 21:29:15,854 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 201 transitions, 1935 flow [2024-06-21 21:29:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:15,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:15,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:15,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 21:29:15,854 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:15,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:15,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1396386276, now seen corresponding path program 32 times [2024-06-21 21:29:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:15,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543738625] [2024-06-21 21:29:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:15,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:17,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:17,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543738625] [2024-06-21 21:29:17,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543738625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:17,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:17,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:17,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137214377] [2024-06-21 21:29:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:17,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:17,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 201 transitions, 1935 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:17,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:17,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:17,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:17,882 INFO L124 PetriNetUnfolderBase]: 576/1147 cut-off events. [2024-06-21 21:29:17,882 INFO L125 PetriNetUnfolderBase]: For 263527/263527 co-relation queries the response was YES. [2024-06-21 21:29:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8724 conditions, 1147 events. 576/1147 cut-off events. For 263527/263527 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6509 event pairs, 139 based on Foata normal form. 10/1155 useless extension candidates. Maximal degree in co-relation 8581. Up to 903 conditions per place. [2024-06-21 21:29:17,894 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 163 selfloop transitions, 45 changer transitions 12/222 dead transitions. [2024-06-21 21:29:17,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 222 transitions, 2461 flow [2024-06-21 21:29:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 21:29:17,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 21:29:17,895 INFO L175 Difference]: Start difference. First operand has 302 places, 201 transitions, 1935 flow. Second operand 12 states and 142 transitions. [2024-06-21 21:29:17,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 222 transitions, 2461 flow [2024-06-21 21:29:18,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 222 transitions, 2345 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:29:18,677 INFO L231 Difference]: Finished difference. Result has 299 places, 195 transitions, 1870 flow [2024-06-21 21:29:18,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1870, PETRI_PLACES=299, PETRI_TRANSITIONS=195} [2024-06-21 21:29:18,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-21 21:29:18,677 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 195 transitions, 1870 flow [2024-06-21 21:29:18,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:18,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:18,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 21:29:18,678 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:18,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:18,678 INFO L85 PathProgramCache]: Analyzing trace with hash -771311032, now seen corresponding path program 25 times [2024-06-21 21:29:18,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:18,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579258578] [2024-06-21 21:29:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:18,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:19,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:19,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579258578] [2024-06-21 21:29:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579258578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:19,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:19,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:19,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372852761] [2024-06-21 21:29:19,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:19,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:19,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:19,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:19,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:20,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:20,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 195 transitions, 1870 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:20,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:20,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:20,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:20,527 INFO L124 PetriNetUnfolderBase]: 546/1093 cut-off events. [2024-06-21 21:29:20,528 INFO L125 PetriNetUnfolderBase]: For 222061/222061 co-relation queries the response was YES. [2024-06-21 21:29:20,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8574 conditions, 1093 events. 546/1093 cut-off events. For 222061/222061 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6186 event pairs, 143 based on Foata normal form. 2/1093 useless extension candidates. Maximal degree in co-relation 8433. Up to 1029 conditions per place. [2024-06-21 21:29:20,538 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 186 selfloop transitions, 23 changer transitions 0/211 dead transitions. [2024-06-21 21:29:20,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 211 transitions, 2386 flow [2024-06-21 21:29:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:29:20,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:29:20,539 INFO L175 Difference]: Start difference. First operand has 299 places, 195 transitions, 1870 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:29:20,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 211 transitions, 2386 flow [2024-06-21 21:29:21,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 211 transitions, 2277 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 21:29:21,239 INFO L231 Difference]: Finished difference. Result has 294 places, 196 transitions, 1871 flow [2024-06-21 21:29:21,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=294, PETRI_TRANSITIONS=196} [2024-06-21 21:29:21,240 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 264 predicate places. [2024-06-21 21:29:21,240 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 196 transitions, 1871 flow [2024-06-21 21:29:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:21,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:21,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:21,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 21:29:21,240 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:21,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1396208646, now seen corresponding path program 33 times [2024-06-21 21:29:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940049886] [2024-06-21 21:29:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:21,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:22,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940049886] [2024-06-21 21:29:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940049886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:22,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:22,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215703972] [2024-06-21 21:29:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:22,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:22,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:22,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 196 transitions, 1871 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:22,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:22,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:22,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:23,105 INFO L124 PetriNetUnfolderBase]: 573/1154 cut-off events. [2024-06-21 21:29:23,105 INFO L125 PetriNetUnfolderBase]: For 280517/280517 co-relation queries the response was YES. [2024-06-21 21:29:23,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9286 conditions, 1154 events. 573/1154 cut-off events. For 280517/280517 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6627 event pairs, 150 based on Foata normal form. 8/1160 useless extension candidates. Maximal degree in co-relation 9147. Up to 925 conditions per place. [2024-06-21 21:29:23,114 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 170 selfloop transitions, 38 changer transitions 9/219 dead transitions. [2024-06-21 21:29:23,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 219 transitions, 2601 flow [2024-06-21 21:29:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 21:29:23,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:29:23,115 INFO L175 Difference]: Start difference. First operand has 294 places, 196 transitions, 1871 flow. Second operand 12 states and 140 transitions. [2024-06-21 21:29:23,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 219 transitions, 2601 flow [2024-06-21 21:29:23,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 219 transitions, 2494 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:23,957 INFO L231 Difference]: Finished difference. Result has 297 places, 193 transitions, 1821 flow [2024-06-21 21:29:23,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1821, PETRI_PLACES=297, PETRI_TRANSITIONS=193} [2024-06-21 21:29:23,957 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2024-06-21 21:29:23,957 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 193 transitions, 1821 flow [2024-06-21 21:29:23,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:23,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:23,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:23,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 21:29:23,958 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:23,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1391624676, now seen corresponding path program 34 times [2024-06-21 21:29:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:23,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472105549] [2024-06-21 21:29:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:23,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:25,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472105549] [2024-06-21 21:29:25,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472105549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:25,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100126132] [2024-06-21 21:29:25,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:25,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 193 transitions, 1821 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:25,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:25,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:25,736 INFO L124 PetriNetUnfolderBase]: 581/1174 cut-off events. [2024-06-21 21:29:25,736 INFO L125 PetriNetUnfolderBase]: For 316995/316995 co-relation queries the response was YES. [2024-06-21 21:29:25,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9931 conditions, 1174 events. 581/1174 cut-off events. For 316995/316995 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6768 event pairs, 147 based on Foata normal form. 8/1180 useless extension candidates. Maximal degree in co-relation 9791. Up to 810 conditions per place. [2024-06-21 21:29:25,747 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 145 selfloop transitions, 60 changer transitions 11/218 dead transitions. [2024-06-21 21:29:25,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 218 transitions, 2557 flow [2024-06-21 21:29:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 21:29:25,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 21:29:25,748 INFO L175 Difference]: Start difference. First operand has 297 places, 193 transitions, 1821 flow. Second operand 12 states and 145 transitions. [2024-06-21 21:29:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 218 transitions, 2557 flow [2024-06-21 21:29:26,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 218 transitions, 2474 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:26,492 INFO L231 Difference]: Finished difference. Result has 295 places, 189 transitions, 1831 flow [2024-06-21 21:29:26,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1831, PETRI_PLACES=295, PETRI_TRANSITIONS=189} [2024-06-21 21:29:26,492 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-21 21:29:26,492 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 189 transitions, 1831 flow [2024-06-21 21:29:26,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:26,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:26,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 21:29:26,492 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:26,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash 118969638, now seen corresponding path program 26 times [2024-06-21 21:29:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:26,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017398165] [2024-06-21 21:29:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:26,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:27,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:27,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017398165] [2024-06-21 21:29:27,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017398165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:27,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:27,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931917291] [2024-06-21 21:29:27,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:27,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:27,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:27,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 189 transitions, 1831 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:27,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:27,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:27,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:28,220 INFO L124 PetriNetUnfolderBase]: 570/1153 cut-off events. [2024-06-21 21:29:28,221 INFO L125 PetriNetUnfolderBase]: For 308233/308233 co-relation queries the response was YES. [2024-06-21 21:29:28,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9954 conditions, 1153 events. 570/1153 cut-off events. For 308233/308233 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6601 event pairs, 167 based on Foata normal form. 8/1159 useless extension candidates. Maximal degree in co-relation 9815. Up to 1075 conditions per place. [2024-06-21 21:29:28,232 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 177 selfloop transitions, 14 changer transitions 13/206 dead transitions. [2024-06-21 21:29:28,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 206 transitions, 2343 flow [2024-06-21 21:29:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 21:29:28,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 21:29:28,233 INFO L175 Difference]: Start difference. First operand has 295 places, 189 transitions, 1831 flow. Second operand 11 states and 118 transitions. [2024-06-21 21:29:28,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 206 transitions, 2343 flow [2024-06-21 21:29:29,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 206 transitions, 2226 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:29:29,065 INFO L231 Difference]: Finished difference. Result has 289 places, 185 transitions, 1721 flow [2024-06-21 21:29:29,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1721, PETRI_PLACES=289, PETRI_TRANSITIONS=185} [2024-06-21 21:29:29,065 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2024-06-21 21:29:29,065 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 185 transitions, 1721 flow [2024-06-21 21:29:29,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:29,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:29,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:29,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 21:29:29,066 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:29,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -355312056, now seen corresponding path program 27 times [2024-06-21 21:29:29,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:29,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729363983] [2024-06-21 21:29:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:30,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:30,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729363983] [2024-06-21 21:29:30,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729363983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:30,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:30,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:30,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67338095] [2024-06-21 21:29:30,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:30,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:30,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:30,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:30,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 185 transitions, 1721 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:30,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:30,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:30,679 INFO L124 PetriNetUnfolderBase]: 566/1149 cut-off events. [2024-06-21 21:29:30,679 INFO L125 PetriNetUnfolderBase]: For 315211/315211 co-relation queries the response was YES. [2024-06-21 21:29:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9727 conditions, 1149 events. 566/1149 cut-off events. For 315211/315211 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6596 event pairs, 161 based on Foata normal form. 12/1159 useless extension candidates. Maximal degree in co-relation 9591. Up to 1018 conditions per place. [2024-06-21 21:29:30,690 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 170 selfloop transitions, 26 changer transitions 7/205 dead transitions. [2024-06-21 21:29:30,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 205 transitions, 2265 flow [2024-06-21 21:29:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:30,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 21:29:30,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 21:29:30,691 INFO L175 Difference]: Start difference. First operand has 289 places, 185 transitions, 1721 flow. Second operand 11 states and 127 transitions. [2024-06-21 21:29:30,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 205 transitions, 2265 flow [2024-06-21 21:29:31,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 205 transitions, 2231 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:31,469 INFO L231 Difference]: Finished difference. Result has 285 places, 183 transitions, 1778 flow [2024-06-21 21:29:31,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1778, PETRI_PLACES=285, PETRI_TRANSITIONS=183} [2024-06-21 21:29:31,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 21:29:31,469 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 183 transitions, 1778 flow [2024-06-21 21:29:31,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:31,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:31,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:31,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 21:29:31,470 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:31,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash 461268228, now seen corresponding path program 28 times [2024-06-21 21:29:31,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:31,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327665260] [2024-06-21 21:29:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:31,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:32,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:32,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327665260] [2024-06-21 21:29:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327665260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:32,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:32,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344696060] [2024-06-21 21:29:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:32,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:32,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 183 transitions, 1778 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:32,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:32,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:33,059 INFO L124 PetriNetUnfolderBase]: 554/1129 cut-off events. [2024-06-21 21:29:33,059 INFO L125 PetriNetUnfolderBase]: For 280739/280739 co-relation queries the response was YES. [2024-06-21 21:29:33,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9671 conditions, 1129 events. 554/1129 cut-off events. For 280739/280739 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6463 event pairs, 167 based on Foata normal form. 8/1135 useless extension candidates. Maximal degree in co-relation 9537. Up to 1054 conditions per place. [2024-06-21 21:29:33,070 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 172 selfloop transitions, 11 changer transitions 15/200 dead transitions. [2024-06-21 21:29:33,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 200 transitions, 2278 flow [2024-06-21 21:29:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 21:29:33,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 21:29:33,071 INFO L175 Difference]: Start difference. First operand has 285 places, 183 transitions, 1778 flow. Second operand 11 states and 116 transitions. [2024-06-21 21:29:33,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 200 transitions, 2278 flow [2024-06-21 21:29:33,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 200 transitions, 2161 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-21 21:29:33,851 INFO L231 Difference]: Finished difference. Result has 285 places, 179 transitions, 1667 flow [2024-06-21 21:29:33,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1667, PETRI_PLACES=285, PETRI_TRANSITIONS=179} [2024-06-21 21:29:33,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 21:29:33,851 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 179 transitions, 1667 flow [2024-06-21 21:29:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:33,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:33,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 21:29:33,851 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:33,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -348816936, now seen corresponding path program 29 times [2024-06-21 21:29:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156040784] [2024-06-21 21:29:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:35,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:35,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156040784] [2024-06-21 21:29:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156040784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:35,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578680954] [2024-06-21 21:29:35,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:35,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:35,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:35,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 179 transitions, 1667 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:35,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:35,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:35,690 INFO L124 PetriNetUnfolderBase]: 532/1083 cut-off events. [2024-06-21 21:29:35,691 INFO L125 PetriNetUnfolderBase]: For 260571/260571 co-relation queries the response was YES. [2024-06-21 21:29:35,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9430 conditions, 1083 events. 532/1083 cut-off events. For 260571/260571 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6110 event pairs, 153 based on Foata normal form. 2/1083 useless extension candidates. Maximal degree in co-relation 9295. Up to 999 conditions per place. [2024-06-21 21:29:35,699 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 168 selfloop transitions, 25 changer transitions 0/195 dead transitions. [2024-06-21 21:29:35,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 195 transitions, 2151 flow [2024-06-21 21:29:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 21:29:35,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 21:29:35,700 INFO L175 Difference]: Start difference. First operand has 285 places, 179 transitions, 1667 flow. Second operand 11 states and 122 transitions. [2024-06-21 21:29:35,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 195 transitions, 2151 flow [2024-06-21 21:29:36,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 195 transitions, 2121 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:29:36,522 INFO L231 Difference]: Finished difference. Result has 279 places, 180 transitions, 1753 flow [2024-06-21 21:29:36,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1753, PETRI_PLACES=279, PETRI_TRANSITIONS=180} [2024-06-21 21:29:36,522 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2024-06-21 21:29:36,522 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 180 transitions, 1753 flow [2024-06-21 21:29:36,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:36,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:36,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:36,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 21:29:36,522 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:36,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash -739012270, now seen corresponding path program 30 times [2024-06-21 21:29:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:36,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771579443] [2024-06-21 21:29:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:36,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771579443] [2024-06-21 21:29:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771579443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:37,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:37,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:37,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157215795] [2024-06-21 21:29:37,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:37,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:37,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:37,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:37,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 180 transitions, 1753 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:37,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:37,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:37,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:38,103 INFO L124 PetriNetUnfolderBase]: 536/1091 cut-off events. [2024-06-21 21:29:38,103 INFO L125 PetriNetUnfolderBase]: For 246346/246346 co-relation queries the response was YES. [2024-06-21 21:29:38,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9465 conditions, 1091 events. 536/1091 cut-off events. For 246346/246346 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6174 event pairs, 163 based on Foata normal form. 2/1091 useless extension candidates. Maximal degree in co-relation 9333. Up to 1031 conditions per place. [2024-06-21 21:29:38,113 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 172 selfloop transitions, 21 changer transitions 0/195 dead transitions. [2024-06-21 21:29:38,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 195 transitions, 2237 flow [2024-06-21 21:29:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 21:29:38,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-21 21:29:38,114 INFO L175 Difference]: Start difference. First operand has 279 places, 180 transitions, 1753 flow. Second operand 11 states and 115 transitions. [2024-06-21 21:29:38,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 195 transitions, 2237 flow [2024-06-21 21:29:38,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 195 transitions, 2131 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:38,873 INFO L231 Difference]: Finished difference. Result has 281 places, 181 transitions, 1758 flow [2024-06-21 21:29:38,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1758, PETRI_PLACES=281, PETRI_TRANSITIONS=181} [2024-06-21 21:29:38,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 21:29:38,873 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 181 transitions, 1758 flow [2024-06-21 21:29:38,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:38,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:38,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:38,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 21:29:38,874 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:38,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash -355319000, now seen corresponding path program 35 times [2024-06-21 21:29:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118322864] [2024-06-21 21:29:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:38,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:40,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:40,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118322864] [2024-06-21 21:29:40,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118322864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:40,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:40,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:40,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815028567] [2024-06-21 21:29:40,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:40,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:40,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:40,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:40,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 181 transitions, 1758 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:40,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:40,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:40,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:40,801 INFO L124 PetriNetUnfolderBase]: 552/1127 cut-off events. [2024-06-21 21:29:40,801 INFO L125 PetriNetUnfolderBase]: For 287011/287011 co-relation queries the response was YES. [2024-06-21 21:29:40,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9538 conditions, 1127 events. 552/1127 cut-off events. For 287011/287011 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6457 event pairs, 165 based on Foata normal form. 10/1135 useless extension candidates. Maximal degree in co-relation 9405. Up to 1002 conditions per place. [2024-06-21 21:29:40,812 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 168 selfloop transitions, 23 changer transitions 9/202 dead transitions. [2024-06-21 21:29:40,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 202 transitions, 2244 flow [2024-06-21 21:29:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 21:29:40,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:29:40,812 INFO L175 Difference]: Start difference. First operand has 281 places, 181 transitions, 1758 flow. Second operand 12 states and 136 transitions. [2024-06-21 21:29:40,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 202 transitions, 2244 flow [2024-06-21 21:29:41,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 202 transitions, 2145 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:41,572 INFO L231 Difference]: Finished difference. Result has 284 places, 178 transitions, 1686 flow [2024-06-21 21:29:41,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1686, PETRI_PLACES=284, PETRI_TRANSITIONS=178} [2024-06-21 21:29:41,572 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 21:29:41,573 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 178 transitions, 1686 flow [2024-06-21 21:29:41,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:41,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:41,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 21:29:41,573 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:41,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash -355496630, now seen corresponding path program 36 times [2024-06-21 21:29:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:41,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977044304] [2024-06-21 21:29:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:41,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:42,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:42,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977044304] [2024-06-21 21:29:42,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977044304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:42,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:42,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875063954] [2024-06-21 21:29:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:42,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:42,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:42,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:42,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 178 transitions, 1686 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:42,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:42,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:42,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:43,342 INFO L124 PetriNetUnfolderBase]: 582/1197 cut-off events. [2024-06-21 21:29:43,343 INFO L125 PetriNetUnfolderBase]: For 358424/358424 co-relation queries the response was YES. [2024-06-21 21:29:43,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11271 conditions, 1197 events. 582/1197 cut-off events. For 358424/358424 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6987 event pairs, 181 based on Foata normal form. 8/1203 useless extension candidates. Maximal degree in co-relation 11137. Up to 972 conditions per place. [2024-06-21 21:29:43,355 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 171 selfloop transitions, 20 changer transitions 8/201 dead transitions. [2024-06-21 21:29:43,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 201 transitions, 2390 flow [2024-06-21 21:29:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 21:29:43,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 21:29:43,356 INFO L175 Difference]: Start difference. First operand has 284 places, 178 transitions, 1686 flow. Second operand 11 states and 129 transitions. [2024-06-21 21:29:43,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 201 transitions, 2390 flow [2024-06-21 21:29:44,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 201 transitions, 2334 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:29:44,391 INFO L231 Difference]: Finished difference. Result has 281 places, 175 transitions, 1651 flow [2024-06-21 21:29:44,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1651, PETRI_PLACES=281, PETRI_TRANSITIONS=175} [2024-06-21 21:29:44,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 21:29:44,392 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 175 transitions, 1651 flow [2024-06-21 21:29:44,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:44,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:44,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:44,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 21:29:44,392 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:44,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2000212218, now seen corresponding path program 31 times [2024-06-21 21:29:44,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:44,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109959350] [2024-06-21 21:29:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:44,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:45,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:45,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109959350] [2024-06-21 21:29:45,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109959350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:45,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:45,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025108872] [2024-06-21 21:29:45,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:45,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:45,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:45,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:45,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 175 transitions, 1651 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:45,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:45,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:45,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:46,086 INFO L124 PetriNetUnfolderBase]: 567/1164 cut-off events. [2024-06-21 21:29:46,086 INFO L125 PetriNetUnfolderBase]: For 325663/325663 co-relation queries the response was YES. [2024-06-21 21:29:46,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11184 conditions, 1164 events. 567/1164 cut-off events. For 325663/325663 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6715 event pairs, 187 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 11051. Up to 1088 conditions per place. [2024-06-21 21:29:46,098 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 166 selfloop transitions, 22 changer transitions 0/190 dead transitions. [2024-06-21 21:29:46,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 190 transitions, 2125 flow [2024-06-21 21:29:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 21:29:46,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 21:29:46,099 INFO L175 Difference]: Start difference. First operand has 281 places, 175 transitions, 1651 flow. Second operand 11 states and 116 transitions. [2024-06-21 21:29:46,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 190 transitions, 2125 flow [2024-06-21 21:29:47,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 190 transitions, 2067 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 21:29:47,060 INFO L231 Difference]: Finished difference. Result has 276 places, 176 transitions, 1707 flow [2024-06-21 21:29:47,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1707, PETRI_PLACES=276, PETRI_TRANSITIONS=176} [2024-06-21 21:29:47,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 21:29:47,060 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 176 transitions, 1707 flow [2024-06-21 21:29:47,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:47,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:47,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 21:29:47,061 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:47,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash -119128326, now seen corresponding path program 32 times [2024-06-21 21:29:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:47,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503255334] [2024-06-21 21:29:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:47,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:48,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:48,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503255334] [2024-06-21 21:29:48,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503255334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:48,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:48,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:29:48,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910585362] [2024-06-21 21:29:48,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:48,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:29:48,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:29:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:29:48,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:48,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 176 transitions, 1707 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:48,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:48,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:48,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:48,692 INFO L124 PetriNetUnfolderBase]: 571/1172 cut-off events. [2024-06-21 21:29:48,693 INFO L125 PetriNetUnfolderBase]: For 321206/321206 co-relation queries the response was YES. [2024-06-21 21:29:48,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11269 conditions, 1172 events. 571/1172 cut-off events. For 321206/321206 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6790 event pairs, 193 based on Foata normal form. 2/1172 useless extension candidates. Maximal degree in co-relation 11137. Up to 1126 conditions per place. [2024-06-21 21:29:48,704 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 173 selfloop transitions, 16 changer transitions 0/191 dead transitions. [2024-06-21 21:29:48,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 191 transitions, 2185 flow [2024-06-21 21:29:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 21:29:48,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-21 21:29:48,705 INFO L175 Difference]: Start difference. First operand has 276 places, 176 transitions, 1707 flow. Second operand 11 states and 115 transitions. [2024-06-21 21:29:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 191 transitions, 2185 flow [2024-06-21 21:29:49,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 191 transitions, 2081 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:49,669 INFO L231 Difference]: Finished difference. Result has 278 places, 177 transitions, 1707 flow [2024-06-21 21:29:49,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1707, PETRI_PLACES=278, PETRI_TRANSITIONS=177} [2024-06-21 21:29:49,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2024-06-21 21:29:49,670 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 177 transitions, 1707 flow [2024-06-21 21:29:49,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:29:49,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:49,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:49,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 21:29:49,670 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:49,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:49,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1024349724, now seen corresponding path program 37 times [2024-06-21 21:29:49,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:49,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981473629] [2024-06-21 21:29:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:49,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:50,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:50,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981473629] [2024-06-21 21:29:50,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981473629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:50,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:50,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:50,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918530173] [2024-06-21 21:29:50,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:50,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:50,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:50,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:50,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:50,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 177 transitions, 1707 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:50,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:50,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:50,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:51,339 INFO L124 PetriNetUnfolderBase]: 566/1169 cut-off events. [2024-06-21 21:29:51,340 INFO L125 PetriNetUnfolderBase]: For 344667/344667 co-relation queries the response was YES. [2024-06-21 21:29:51,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10212 conditions, 1169 events. 566/1169 cut-off events. For 344667/344667 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6777 event pairs, 188 based on Foata normal form. 16/1183 useless extension candidates. Maximal degree in co-relation 10079. Up to 1028 conditions per place. [2024-06-21 21:29:51,351 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 160 selfloop transitions, 15 changer transitions 18/195 dead transitions. [2024-06-21 21:29:51,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 195 transitions, 2169 flow [2024-06-21 21:29:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 21:29:51,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 21:29:51,352 INFO L175 Difference]: Start difference. First operand has 278 places, 177 transitions, 1707 flow. Second operand 11 states and 120 transitions. [2024-06-21 21:29:51,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 195 transitions, 2169 flow [2024-06-21 21:29:52,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 195 transitions, 2075 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 21:29:52,171 INFO L231 Difference]: Finished difference. Result has 280 places, 167 transitions, 1574 flow [2024-06-21 21:29:52,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1574, PETRI_PLACES=280, PETRI_TRANSITIONS=167} [2024-06-21 21:29:52,171 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-21 21:29:52,171 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 167 transitions, 1574 flow [2024-06-21 21:29:52,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:52,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:52,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:52,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 21:29:52,172 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:52,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -349062890, now seen corresponding path program 38 times [2024-06-21 21:29:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492544437] [2024-06-21 21:29:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:53,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:53,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492544437] [2024-06-21 21:29:53,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492544437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:53,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:53,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149191560] [2024-06-21 21:29:53,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:53,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:53,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 167 transitions, 1574 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:53,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:53,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:53,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:54,433 INFO L124 PetriNetUnfolderBase]: 501/1046 cut-off events. [2024-06-21 21:29:54,433 INFO L125 PetriNetUnfolderBase]: For 272215/272215 co-relation queries the response was YES. [2024-06-21 21:29:54,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8705 conditions, 1046 events. 501/1046 cut-off events. For 272215/272215 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5972 event pairs, 159 based on Foata normal form. 10/1054 useless extension candidates. Maximal degree in co-relation 8571. Up to 932 conditions per place. [2024-06-21 21:29:54,442 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 156 selfloop transitions, 20 changer transitions 9/187 dead transitions. [2024-06-21 21:29:54,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 187 transitions, 2008 flow [2024-06-21 21:29:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 21:29:54,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 21:29:54,443 INFO L175 Difference]: Start difference. First operand has 280 places, 167 transitions, 1574 flow. Second operand 12 states and 134 transitions. [2024-06-21 21:29:54,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 187 transitions, 2008 flow [2024-06-21 21:29:55,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 187 transitions, 1937 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-21 21:29:55,074 INFO L231 Difference]: Finished difference. Result has 275 places, 163 transitions, 1514 flow [2024-06-21 21:29:55,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1514, PETRI_PLACES=275, PETRI_TRANSITIONS=163} [2024-06-21 21:29:55,074 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-21 21:29:55,074 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 163 transitions, 1514 flow [2024-06-21 21:29:55,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:55,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:55,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:55,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 21:29:55,074 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:55,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash -118840026, now seen corresponding path program 33 times [2024-06-21 21:29:55,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:55,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506142569] [2024-06-21 21:29:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:55,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:56,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506142569] [2024-06-21 21:29:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506142569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:56,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:56,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113697827] [2024-06-21 21:29:56,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:56,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:56,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:56,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:56,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 163 transitions, 1514 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:56,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:56,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:56,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:56,822 INFO L124 PetriNetUnfolderBase]: 472/991 cut-off events. [2024-06-21 21:29:56,822 INFO L125 PetriNetUnfolderBase]: For 216410/216410 co-relation queries the response was YES. [2024-06-21 21:29:56,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8082 conditions, 991 events. 472/991 cut-off events. For 216410/216410 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5564 event pairs, 152 based on Foata normal form. 2/991 useless extension candidates. Maximal degree in co-relation 7951. Up to 945 conditions per place. [2024-06-21 21:29:56,829 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 159 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2024-06-21 21:29:56,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 177 transitions, 1896 flow [2024-06-21 21:29:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:29:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:29:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 21:29:56,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-21 21:29:56,830 INFO L175 Difference]: Start difference. First operand has 275 places, 163 transitions, 1514 flow. Second operand 11 states and 115 transitions. [2024-06-21 21:29:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 177 transitions, 1896 flow [2024-06-21 21:29:57,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 177 transitions, 1810 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-21 21:29:57,302 INFO L231 Difference]: Finished difference. Result has 269 places, 163 transitions, 1464 flow [2024-06-21 21:29:57,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1464, PETRI_PLACES=269, PETRI_TRANSITIONS=163} [2024-06-21 21:29:57,302 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 239 predicate places. [2024-06-21 21:29:57,302 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 163 transitions, 1464 flow [2024-06-21 21:29:57,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:57,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:57,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 21:29:57,302 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:57,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1864010104, now seen corresponding path program 34 times [2024-06-21 21:29:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910730430] [2024-06-21 21:29:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:29:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:29:58,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:29:58,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910730430] [2024-06-21 21:29:58,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910730430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:29:58,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:29:58,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:29:58,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699021135] [2024-06-21 21:29:58,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:29:58,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:29:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:29:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:29:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:29:58,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:29:58,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 163 transitions, 1464 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:58,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:29:58,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:29:58,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:29:59,226 INFO L124 PetriNetUnfolderBase]: 469/986 cut-off events. [2024-06-21 21:29:59,227 INFO L125 PetriNetUnfolderBase]: For 198583/198583 co-relation queries the response was YES. [2024-06-21 21:29:59,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7637 conditions, 986 events. 469/986 cut-off events. For 198583/198583 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5554 event pairs, 133 based on Foata normal form. 2/986 useless extension candidates. Maximal degree in co-relation 7509. Up to 875 conditions per place. [2024-06-21 21:29:59,234 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 147 selfloop transitions, 35 changer transitions 0/184 dead transitions. [2024-06-21 21:29:59,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 184 transitions, 1891 flow [2024-06-21 21:29:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:29:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:29:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 21:29:59,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:29:59,235 INFO L175 Difference]: Start difference. First operand has 269 places, 163 transitions, 1464 flow. Second operand 12 states and 138 transitions. [2024-06-21 21:29:59,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 184 transitions, 1891 flow [2024-06-21 21:29:59,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 184 transitions, 1676 flow, removed 45 selfloop flow, removed 14 redundant places. [2024-06-21 21:29:59,771 INFO L231 Difference]: Finished difference. Result has 267 places, 163 transitions, 1323 flow [2024-06-21 21:29:59,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1323, PETRI_PLACES=267, PETRI_TRANSITIONS=163} [2024-06-21 21:29:59,772 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-21 21:29:59,772 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 163 transitions, 1323 flow [2024-06-21 21:29:59,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-21 21:29:59,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:29:59,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:29:59,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 21:29:59,772 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:29:59,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:29:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1486448968, now seen corresponding path program 1 times [2024-06-21 21:29:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:29:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155244373] [2024-06-21 21:29:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:29:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:29:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155244373] [2024-06-21 21:30:01,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155244373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:01,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:01,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311002363] [2024-06-21 21:30:01,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:01,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:01,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 163 transitions, 1323 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:01,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:01,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:01,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:01,777 INFO L124 PetriNetUnfolderBase]: 462/973 cut-off events. [2024-06-21 21:30:01,777 INFO L125 PetriNetUnfolderBase]: For 191252/191252 co-relation queries the response was YES. [2024-06-21 21:30:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6725 conditions, 973 events. 462/973 cut-off events. For 191252/191252 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5474 event pairs, 125 based on Foata normal form. 6/977 useless extension candidates. Maximal degree in co-relation 6601. Up to 590 conditions per place. [2024-06-21 21:30:01,786 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 55 changer transitions 14/184 dead transitions. [2024-06-21 21:30:01,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 184 transitions, 1747 flow [2024-06-21 21:30:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 21:30:01,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:30:01,786 INFO L175 Difference]: Start difference. First operand has 267 places, 163 transitions, 1323 flow. Second operand 12 states and 138 transitions. [2024-06-21 21:30:01,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 184 transitions, 1747 flow [2024-06-21 21:30:02,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 184 transitions, 1593 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-21 21:30:02,137 INFO L231 Difference]: Finished difference. Result has 266 places, 158 transitions, 1255 flow [2024-06-21 21:30:02,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1255, PETRI_PLACES=266, PETRI_TRANSITIONS=158} [2024-06-21 21:30:02,138 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 21:30:02,138 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 158 transitions, 1255 flow [2024-06-21 21:30:02,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:02,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:02,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:02,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 21:30:02,138 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:02,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash -592566938, now seen corresponding path program 2 times [2024-06-21 21:30:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:02,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724017668] [2024-06-21 21:30:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:02,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724017668] [2024-06-21 21:30:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724017668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978840567] [2024-06-21 21:30:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:04,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:04,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:04,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:04,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 158 transitions, 1255 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:04,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:04,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:04,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:04,750 INFO L124 PetriNetUnfolderBase]: 452/951 cut-off events. [2024-06-21 21:30:04,750 INFO L125 PetriNetUnfolderBase]: For 195360/195360 co-relation queries the response was YES. [2024-06-21 21:30:04,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6594 conditions, 951 events. 452/951 cut-off events. For 195360/195360 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5321 event pairs, 122 based on Foata normal form. 6/955 useless extension candidates. Maximal degree in co-relation 6472. Up to 583 conditions per place. [2024-06-21 21:30:04,759 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 53 changer transitions 10/179 dead transitions. [2024-06-21 21:30:04,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 179 transitions, 1667 flow [2024-06-21 21:30:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 21:30:04,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 21:30:04,760 INFO L175 Difference]: Start difference. First operand has 266 places, 158 transitions, 1255 flow. Second operand 12 states and 134 transitions. [2024-06-21 21:30:04,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 179 transitions, 1667 flow [2024-06-21 21:30:05,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 179 transitions, 1547 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:05,175 INFO L231 Difference]: Finished difference. Result has 257 places, 154 transitions, 1224 flow [2024-06-21 21:30:05,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1224, PETRI_PLACES=257, PETRI_TRANSITIONS=154} [2024-06-21 21:30:05,176 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 21:30:05,176 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 154 transitions, 1224 flow [2024-06-21 21:30:05,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:05,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:05,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 21:30:05,176 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:05,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash -793915658, now seen corresponding path program 3 times [2024-06-21 21:30:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:05,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411075185] [2024-06-21 21:30:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411075185] [2024-06-21 21:30:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411075185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:07,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110575219] [2024-06-21 21:30:07,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:07,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:07,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:07,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:07,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 154 transitions, 1224 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:07,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:07,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:07,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:07,841 INFO L124 PetriNetUnfolderBase]: 425/894 cut-off events. [2024-06-21 21:30:07,842 INFO L125 PetriNetUnfolderBase]: For 153897/153897 co-relation queries the response was YES. [2024-06-21 21:30:07,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 894 events. 425/894 cut-off events. For 153897/153897 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4896 event pairs, 110 based on Foata normal form. 6/898 useless extension candidates. Maximal degree in co-relation 5616. Up to 529 conditions per place. [2024-06-21 21:30:07,849 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 100 selfloop transitions, 48 changer transitions 23/173 dead transitions. [2024-06-21 21:30:07,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 173 transitions, 1618 flow [2024-06-21 21:30:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 21:30:07,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 21:30:07,850 INFO L175 Difference]: Start difference. First operand has 257 places, 154 transitions, 1224 flow. Second operand 12 states and 131 transitions. [2024-06-21 21:30:07,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 173 transitions, 1618 flow [2024-06-21 21:30:08,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 173 transitions, 1504 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 21:30:08,112 INFO L231 Difference]: Finished difference. Result has 251 places, 144 transitions, 1139 flow [2024-06-21 21:30:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1139, PETRI_PLACES=251, PETRI_TRANSITIONS=144} [2024-06-21 21:30:08,112 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 21:30:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 144 transitions, 1139 flow [2024-06-21 21:30:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 21:30:08,113 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:08,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash -566210874, now seen corresponding path program 4 times [2024-06-21 21:30:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645031980] [2024-06-21 21:30:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:08,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:09,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:09,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645031980] [2024-06-21 21:30:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645031980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:09,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:30:09,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283533272] [2024-06-21 21:30:09,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:09,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:30:09,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:09,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:30:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:30:09,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:09,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 144 transitions, 1139 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:09,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:09,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:09,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:10,339 INFO L124 PetriNetUnfolderBase]: 407/857 cut-off events. [2024-06-21 21:30:10,339 INFO L125 PetriNetUnfolderBase]: For 144085/144085 co-relation queries the response was YES. [2024-06-21 21:30:10,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5494 conditions, 857 events. 407/857 cut-off events. For 144085/144085 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4669 event pairs, 105 based on Foata normal form. 6/861 useless extension candidates. Maximal degree in co-relation 5379. Up to 730 conditions per place. [2024-06-21 21:30:10,346 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 120 selfloop transitions, 25 changer transitions 16/163 dead transitions. [2024-06-21 21:30:10,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 163 transitions, 1513 flow [2024-06-21 21:30:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 21:30:10,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 21:30:10,347 INFO L175 Difference]: Start difference. First operand has 251 places, 144 transitions, 1139 flow. Second operand 12 states and 130 transitions. [2024-06-21 21:30:10,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 163 transitions, 1513 flow [2024-06-21 21:30:10,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 163 transitions, 1387 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-21 21:30:10,583 INFO L231 Difference]: Finished difference. Result has 235 places, 138 transitions, 1016 flow [2024-06-21 21:30:10,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1016, PETRI_PLACES=235, PETRI_TRANSITIONS=138} [2024-06-21 21:30:10,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 21:30:10,584 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 138 transitions, 1016 flow [2024-06-21 21:30:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:10,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:10,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:10,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 21:30:10,584 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:10,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash -557273574, now seen corresponding path program 5 times [2024-06-21 21:30:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:10,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78924846] [2024-06-21 21:30:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:12,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78924846] [2024-06-21 21:30:12,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78924846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:12,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:12,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:12,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640877720] [2024-06-21 21:30:12,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:12,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:12,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:12,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:12,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:12,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 138 transitions, 1016 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:12,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:12,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:12,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:12,993 INFO L124 PetriNetUnfolderBase]: 387/821 cut-off events. [2024-06-21 21:30:12,993 INFO L125 PetriNetUnfolderBase]: For 125150/125150 co-relation queries the response was YES. [2024-06-21 21:30:12,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 821 events. 387/821 cut-off events. For 125150/125150 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4436 event pairs, 101 based on Foata normal form. 6/825 useless extension candidates. Maximal degree in co-relation 4997. Up to 702 conditions per place. [2024-06-21 21:30:13,000 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 115 selfloop transitions, 21 changer transitions 17/155 dead transitions. [2024-06-21 21:30:13,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 155 transitions, 1368 flow [2024-06-21 21:30:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:30:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:30:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 21:30:13,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:30:13,000 INFO L175 Difference]: Start difference. First operand has 235 places, 138 transitions, 1016 flow. Second operand 11 states and 121 transitions. [2024-06-21 21:30:13,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 155 transitions, 1368 flow [2024-06-21 21:30:13,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 155 transitions, 1310 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:30:13,257 INFO L231 Difference]: Finished difference. Result has 228 places, 131 transitions, 965 flow [2024-06-21 21:30:13,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=965, PETRI_PLACES=228, PETRI_TRANSITIONS=131} [2024-06-21 21:30:13,258 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-06-21 21:30:13,258 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 131 transitions, 965 flow [2024-06-21 21:30:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:13,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:13,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:13,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 21:30:13,258 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:13,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:13,258 INFO L85 PathProgramCache]: Analyzing trace with hash -954808518, now seen corresponding path program 6 times [2024-06-21 21:30:13,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:13,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226498703] [2024-06-21 21:30:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:13,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:15,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226498703] [2024-06-21 21:30:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226498703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938294722] [2024-06-21 21:30:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:15,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:15,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:15,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 131 transitions, 965 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:15,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:15,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:15,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:15,638 INFO L124 PetriNetUnfolderBase]: 367/781 cut-off events. [2024-06-21 21:30:15,638 INFO L125 PetriNetUnfolderBase]: For 119204/119204 co-relation queries the response was YES. [2024-06-21 21:30:15,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 781 events. 367/781 cut-off events. For 119204/119204 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4185 event pairs, 99 based on Foata normal form. 6/785 useless extension candidates. Maximal degree in co-relation 4813. Up to 597 conditions per place. [2024-06-21 21:30:15,644 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 104 selfloop transitions, 33 changer transitions 11/150 dead transitions. [2024-06-21 21:30:15,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 150 transitions, 1315 flow [2024-06-21 21:30:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 21:30:15,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 21:30:15,645 INFO L175 Difference]: Start difference. First operand has 228 places, 131 transitions, 965 flow. Second operand 12 states and 133 transitions. [2024-06-21 21:30:15,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 150 transitions, 1315 flow [2024-06-21 21:30:15,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 150 transitions, 1237 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 21:30:15,845 INFO L231 Difference]: Finished difference. Result has 219 places, 128 transitions, 941 flow [2024-06-21 21:30:15,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=941, PETRI_PLACES=219, PETRI_TRANSITIONS=128} [2024-06-21 21:30:15,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-21 21:30:15,845 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 128 transitions, 941 flow [2024-06-21 21:30:15,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:15,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:15,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:15,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 21:30:15,846 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:15,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 895967498, now seen corresponding path program 7 times [2024-06-21 21:30:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:15,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950658438] [2024-06-21 21:30:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950658438] [2024-06-21 21:30:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950658438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:18,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497158286] [2024-06-21 21:30:18,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:18,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:18,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:18,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:18,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:18,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 128 transitions, 941 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:18,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:18,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:18,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:18,778 INFO L124 PetriNetUnfolderBase]: 357/763 cut-off events. [2024-06-21 21:30:18,778 INFO L125 PetriNetUnfolderBase]: For 110597/110597 co-relation queries the response was YES. [2024-06-21 21:30:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4766 conditions, 763 events. 357/763 cut-off events. For 110597/110597 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4068 event pairs, 95 based on Foata normal form. 6/767 useless extension candidates. Maximal degree in co-relation 4667. Up to 612 conditions per place. [2024-06-21 21:30:18,783 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 29 changer transitions 14/146 dead transitions. [2024-06-21 21:30:18,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 146 transitions, 1279 flow [2024-06-21 21:30:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 21:30:18,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:30:18,783 INFO L175 Difference]: Start difference. First operand has 219 places, 128 transitions, 941 flow. Second operand 12 states and 129 transitions. [2024-06-21 21:30:18,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 146 transitions, 1279 flow [2024-06-21 21:30:18,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 146 transitions, 1207 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:30:18,962 INFO L231 Difference]: Finished difference. Result has 215 places, 122 transitions, 901 flow [2024-06-21 21:30:18,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=901, PETRI_PLACES=215, PETRI_TRANSITIONS=122} [2024-06-21 21:30:18,962 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-21 21:30:18,962 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 122 transitions, 901 flow [2024-06-21 21:30:18,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:18,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:18,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 21:30:18,963 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:18,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 737630234, now seen corresponding path program 8 times [2024-06-21 21:30:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:18,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015722934] [2024-06-21 21:30:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:18,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:20,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:20,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015722934] [2024-06-21 21:30:20,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015722934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:20,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068318684] [2024-06-21 21:30:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:20,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:20,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:20,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:20,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 122 transitions, 901 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:20,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:20,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:20,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:21,238 INFO L124 PetriNetUnfolderBase]: 337/727 cut-off events. [2024-06-21 21:30:21,239 INFO L125 PetriNetUnfolderBase]: For 105084/105084 co-relation queries the response was YES. [2024-06-21 21:30:21,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4596 conditions, 727 events. 337/727 cut-off events. For 105084/105084 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3842 event pairs, 91 based on Foata normal form. 6/731 useless extension candidates. Maximal degree in co-relation 4499. Up to 584 conditions per place. [2024-06-21 21:30:21,244 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 26 changer transitions 12/140 dead transitions. [2024-06-21 21:30:21,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 140 transitions, 1225 flow [2024-06-21 21:30:21,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 21:30:21,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:30:21,245 INFO L175 Difference]: Start difference. First operand has 215 places, 122 transitions, 901 flow. Second operand 12 states and 129 transitions. [2024-06-21 21:30:21,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 140 transitions, 1225 flow [2024-06-21 21:30:21,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 140 transitions, 1159 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:21,407 INFO L231 Difference]: Finished difference. Result has 208 places, 116 transitions, 848 flow [2024-06-21 21:30:21,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=848, PETRI_PLACES=208, PETRI_TRANSITIONS=116} [2024-06-21 21:30:21,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 21:30:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 116 transitions, 848 flow [2024-06-21 21:30:21,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:21,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:21,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:21,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 21:30:21,408 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:21,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 536281514, now seen corresponding path program 9 times [2024-06-21 21:30:21,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:21,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396878449] [2024-06-21 21:30:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:21,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:23,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396878449] [2024-06-21 21:30:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396878449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:23,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:23,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:23,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585058283] [2024-06-21 21:30:23,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:23,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:23,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:23,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:23,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 116 transitions, 848 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:23,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:23,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:23,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:24,282 INFO L124 PetriNetUnfolderBase]: 321/695 cut-off events. [2024-06-21 21:30:24,282 INFO L125 PetriNetUnfolderBase]: For 96899/96899 co-relation queries the response was YES. [2024-06-21 21:30:24,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4399 conditions, 695 events. 321/695 cut-off events. For 96899/96899 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3622 event pairs, 92 based on Foata normal form. 6/699 useless extension candidates. Maximal degree in co-relation 4305. Up to 571 conditions per place. [2024-06-21 21:30:24,287 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 91 selfloop transitions, 19 changer transitions 21/133 dead transitions. [2024-06-21 21:30:24,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 133 transitions, 1156 flow [2024-06-21 21:30:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 127 transitions. [2024-06-21 21:30:24,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34139784946236557 [2024-06-21 21:30:24,288 INFO L175 Difference]: Start difference. First operand has 208 places, 116 transitions, 848 flow. Second operand 12 states and 127 transitions. [2024-06-21 21:30:24,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 133 transitions, 1156 flow [2024-06-21 21:30:24,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 133 transitions, 1092 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 21:30:24,466 INFO L231 Difference]: Finished difference. Result has 201 places, 106 transitions, 762 flow [2024-06-21 21:30:24,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=762, PETRI_PLACES=201, PETRI_TRANSITIONS=106} [2024-06-21 21:30:24,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-21 21:30:24,466 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 106 transitions, 762 flow [2024-06-21 21:30:24,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:24,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:24,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:24,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 21:30:24,467 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:24,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash -788802474, now seen corresponding path program 10 times [2024-06-21 21:30:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:24,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497463983] [2024-06-21 21:30:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:26,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:26,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497463983] [2024-06-21 21:30:26,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497463983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:26,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:26,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5403838] [2024-06-21 21:30:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:26,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:26,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:26,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 106 transitions, 762 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:26,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:26,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:26,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:27,106 INFO L124 PetriNetUnfolderBase]: 318/686 cut-off events. [2024-06-21 21:30:27,106 INFO L125 PetriNetUnfolderBase]: For 103901/103901 co-relation queries the response was YES. [2024-06-21 21:30:27,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4662 conditions, 686 events. 318/686 cut-off events. For 103901/103901 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3540 event pairs, 104 based on Foata normal form. 6/690 useless extension candidates. Maximal degree in co-relation 4571. Up to 474 conditions per place. [2024-06-21 21:30:27,110 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 92 selfloop transitions, 23 changer transitions 10/127 dead transitions. [2024-06-21 21:30:27,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 127 transitions, 1214 flow [2024-06-21 21:30:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 21:30:27,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:30:27,111 INFO L175 Difference]: Start difference. First operand has 201 places, 106 transitions, 762 flow. Second operand 12 states and 132 transitions. [2024-06-21 21:30:27,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 127 transitions, 1214 flow [2024-06-21 21:30:27,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 127 transitions, 1142 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:27,256 INFO L231 Difference]: Finished difference. Result has 186 places, 102 transitions, 735 flow [2024-06-21 21:30:27,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=735, PETRI_PLACES=186, PETRI_TRANSITIONS=102} [2024-06-21 21:30:27,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-21 21:30:27,256 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 102 transitions, 735 flow [2024-06-21 21:30:27,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:27,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:27,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 21:30:27,256 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:27,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1155897768, now seen corresponding path program 11 times [2024-06-21 21:30:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031976574] [2024-06-21 21:30:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:27,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:28,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:28,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031976574] [2024-06-21 21:30:28,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031976574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:28,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:28,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218144894] [2024-06-21 21:30:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:28,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:28,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:28,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 102 transitions, 735 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:28,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:28,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:28,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:29,169 INFO L124 PetriNetUnfolderBase]: 291/629 cut-off events. [2024-06-21 21:30:29,169 INFO L125 PetriNetUnfolderBase]: For 75307/75307 co-relation queries the response was YES. [2024-06-21 21:30:29,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3870 conditions, 629 events. 291/629 cut-off events. For 75307/75307 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3153 event pairs, 91 based on Foata normal form. 6/633 useless extension candidates. Maximal degree in co-relation 3785. Up to 517 conditions per place. [2024-06-21 21:30:29,173 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 19 changer transitions 14/120 dead transitions. [2024-06-21 21:30:29,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 120 transitions, 1019 flow [2024-06-21 21:30:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 21:30:29,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 21:30:29,174 INFO L175 Difference]: Start difference. First operand has 186 places, 102 transitions, 735 flow. Second operand 12 states and 129 transitions. [2024-06-21 21:30:29,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 120 transitions, 1019 flow [2024-06-21 21:30:29,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 120 transitions, 967 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:29,292 INFO L231 Difference]: Finished difference. Result has 181 places, 97 transitions, 695 flow [2024-06-21 21:30:29,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=695, PETRI_PLACES=181, PETRI_TRANSITIONS=97} [2024-06-21 21:30:29,292 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-21 21:30:29,292 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 97 transitions, 695 flow [2024-06-21 21:30:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:29,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:29,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:29,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 21:30:29,293 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:29,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:29,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1848431078, now seen corresponding path program 12 times [2024-06-21 21:30:29,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:29,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932737672] [2024-06-21 21:30:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:29,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:30,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:30,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932737672] [2024-06-21 21:30:30,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932737672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:30,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:30,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:30:30,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251417971] [2024-06-21 21:30:30,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:30,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:30:30,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:30:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:30:30,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:30,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 97 transitions, 695 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:30,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:30,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:30,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:31,103 INFO L124 PetriNetUnfolderBase]: 266/574 cut-off events. [2024-06-21 21:30:31,103 INFO L125 PetriNetUnfolderBase]: For 57133/57133 co-relation queries the response was YES. [2024-06-21 21:30:31,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3253 conditions, 574 events. 266/574 cut-off events. For 57133/57133 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2766 event pairs, 78 based on Foata normal form. 6/578 useless extension candidates. Maximal degree in co-relation 3171. Up to 474 conditions per place. [2024-06-21 21:30:31,107 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 11 changer transitions 26/114 dead transitions. [2024-06-21 21:30:31,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 114 transitions, 963 flow [2024-06-21 21:30:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 21:30:31,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 21:30:31,107 INFO L175 Difference]: Start difference. First operand has 181 places, 97 transitions, 695 flow. Second operand 12 states and 125 transitions. [2024-06-21 21:30:31,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 114 transitions, 963 flow [2024-06-21 21:30:31,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 114 transitions, 915 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:31,180 INFO L231 Difference]: Finished difference. Result has 172 places, 85 transitions, 600 flow [2024-06-21 21:30:31,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=600, PETRI_PLACES=172, PETRI_TRANSITIONS=85} [2024-06-21 21:30:31,180 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 21:30:31,180 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 85 transitions, 600 flow [2024-06-21 21:30:31,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:31,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:31,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:31,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 21:30:31,180 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:31,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1010859206, now seen corresponding path program 13 times [2024-06-21 21:30:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:31,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241297890] [2024-06-21 21:30:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241297890] [2024-06-21 21:30:32,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241297890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:32,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:32,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:30:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355995912] [2024-06-21 21:30:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:30:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:30:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:30:32,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:32,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 85 transitions, 600 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:32,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:32,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:32,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:33,160 INFO L124 PetriNetUnfolderBase]: 248/529 cut-off events. [2024-06-21 21:30:33,161 INFO L125 PetriNetUnfolderBase]: For 49900/49900 co-relation queries the response was YES. [2024-06-21 21:30:33,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 529 events. 248/529 cut-off events. For 49900/49900 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2539 event pairs, 74 based on Foata normal form. 6/534 useless extension candidates. Maximal degree in co-relation 2915. Up to 448 conditions per place. [2024-06-21 21:30:33,163 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 12 changer transitions 17/102 dead transitions. [2024-06-21 21:30:33,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 102 transitions, 844 flow [2024-06-21 21:30:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 123 transitions. [2024-06-21 21:30:33,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2024-06-21 21:30:33,164 INFO L175 Difference]: Start difference. First operand has 172 places, 85 transitions, 600 flow. Second operand 12 states and 123 transitions. [2024-06-21 21:30:33,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 102 transitions, 844 flow [2024-06-21 21:30:33,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 102 transitions, 791 flow, removed 9 selfloop flow, removed 18 redundant places. [2024-06-21 21:30:33,223 INFO L231 Difference]: Finished difference. Result has 149 places, 80 transitions, 542 flow [2024-06-21 21:30:33,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=542, PETRI_PLACES=149, PETRI_TRANSITIONS=80} [2024-06-21 21:30:33,224 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-21 21:30:33,224 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 80 transitions, 542 flow [2024-06-21 21:30:33,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:33,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:33,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:33,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 21:30:33,224 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:33,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1524565900, now seen corresponding path program 14 times [2024-06-21 21:30:33,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:33,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047527624] [2024-06-21 21:30:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:33,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:34,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047527624] [2024-06-21 21:30:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047527624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:34,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:34,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964681115] [2024-06-21 21:30:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:34,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:34,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 80 transitions, 542 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:34,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:34,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:34,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:35,190 INFO L124 PetriNetUnfolderBase]: 232/497 cut-off events. [2024-06-21 21:30:35,190 INFO L125 PetriNetUnfolderBase]: For 37004/37004 co-relation queries the response was YES. [2024-06-21 21:30:35,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2684 conditions, 497 events. 232/497 cut-off events. For 37004/37004 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2334 event pairs, 72 based on Foata normal form. 6/502 useless extension candidates. Maximal degree in co-relation 2616. Up to 428 conditions per place. [2024-06-21 21:30:35,192 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 70 selfloop transitions, 10 changer transitions 14/96 dead transitions. [2024-06-21 21:30:35,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 96 transitions, 770 flow [2024-06-21 21:30:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 120 transitions. [2024-06-21 21:30:35,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-21 21:30:35,193 INFO L175 Difference]: Start difference. First operand has 149 places, 80 transitions, 542 flow. Second operand 12 states and 120 transitions. [2024-06-21 21:30:35,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 96 transitions, 770 flow [2024-06-21 21:30:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 96 transitions, 738 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:30:35,247 INFO L231 Difference]: Finished difference. Result has 142 places, 76 transitions, 505 flow [2024-06-21 21:30:35,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=505, PETRI_PLACES=142, PETRI_TRANSITIONS=76} [2024-06-21 21:30:35,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-21 21:30:35,248 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 76 transitions, 505 flow [2024-06-21 21:30:35,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:35,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:35,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:35,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 21:30:35,248 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:35,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1870228936, now seen corresponding path program 15 times [2024-06-21 21:30:35,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:35,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756468842] [2024-06-21 21:30:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:36,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756468842] [2024-06-21 21:30:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756468842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:36,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:36,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318605446] [2024-06-21 21:30:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:36,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:36,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:37,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:37,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 76 transitions, 505 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:37,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:37,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:37,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:37,360 INFO L124 PetriNetUnfolderBase]: 218/471 cut-off events. [2024-06-21 21:30:37,360 INFO L125 PetriNetUnfolderBase]: For 34048/34048 co-relation queries the response was YES. [2024-06-21 21:30:37,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2539 conditions, 471 events. 218/471 cut-off events. For 34048/34048 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2183 event pairs, 70 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 2474. Up to 392 conditions per place. [2024-06-21 21:30:37,362 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 12 changer transitions 12/93 dead transitions. [2024-06-21 21:30:37,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 93 transitions, 733 flow [2024-06-21 21:30:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-21 21:30:37,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 21:30:37,363 INFO L175 Difference]: Start difference. First operand has 142 places, 76 transitions, 505 flow. Second operand 12 states and 124 transitions. [2024-06-21 21:30:37,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 93 transitions, 733 flow [2024-06-21 21:30:37,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 93 transitions, 692 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:37,406 INFO L231 Difference]: Finished difference. Result has 135 places, 72 transitions, 468 flow [2024-06-21 21:30:37,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=468, PETRI_PLACES=135, PETRI_TRANSITIONS=72} [2024-06-21 21:30:37,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 21:30:37,406 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 72 transitions, 468 flow [2024-06-21 21:30:37,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:37,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:37,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:37,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 21:30:37,407 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:37,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash 338517644, now seen corresponding path program 16 times [2024-06-21 21:30:37,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:37,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690287520] [2024-06-21 21:30:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:37,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:39,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690287520] [2024-06-21 21:30:39,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690287520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:39,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:39,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044102667] [2024-06-21 21:30:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:39,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:39,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:39,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:39,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 72 transitions, 468 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:39,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:39,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:39,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:39,589 INFO L124 PetriNetUnfolderBase]: 194/419 cut-off events. [2024-06-21 21:30:39,589 INFO L125 PetriNetUnfolderBase]: For 25028/25028 co-relation queries the response was YES. [2024-06-21 21:30:39,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 419 events. 194/419 cut-off events. For 25028/25028 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1862 event pairs, 53 based on Foata normal form. 6/424 useless extension candidates. Maximal degree in co-relation 2010. Up to 276 conditions per place. [2024-06-21 21:30:39,591 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 50 selfloop transitions, 23 changer transitions 14/89 dead transitions. [2024-06-21 21:30:39,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 89 transitions, 688 flow [2024-06-21 21:30:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 21:30:39,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 21:30:39,592 INFO L175 Difference]: Start difference. First operand has 135 places, 72 transitions, 468 flow. Second operand 12 states and 125 transitions. [2024-06-21 21:30:39,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 89 transitions, 688 flow [2024-06-21 21:30:39,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 89 transitions, 652 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:39,619 INFO L231 Difference]: Finished difference. Result has 129 places, 67 transitions, 456 flow [2024-06-21 21:30:39,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=129, PETRI_TRANSITIONS=67} [2024-06-21 21:30:39,619 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2024-06-21 21:30:39,619 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 67 transitions, 456 flow [2024-06-21 21:30:39,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:39,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:39,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:39,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 21:30:39,619 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:39,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash -615845034, now seen corresponding path program 17 times [2024-06-21 21:30:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101616147] [2024-06-21 21:30:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:39,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:41,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:41,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101616147] [2024-06-21 21:30:41,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101616147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:41,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:41,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:41,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036419700] [2024-06-21 21:30:41,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:41,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:41,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:41,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:41,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 67 transitions, 456 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:41,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:41,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:41,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:41,517 INFO L124 PetriNetUnfolderBase]: 184/397 cut-off events. [2024-06-21 21:30:41,517 INFO L125 PetriNetUnfolderBase]: For 22208/22208 co-relation queries the response was YES. [2024-06-21 21:30:41,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 397 events. 184/397 cut-off events. For 22208/22208 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1720 event pairs, 55 based on Foata normal form. 6/402 useless extension candidates. Maximal degree in co-relation 1894. Up to 317 conditions per place. [2024-06-21 21:30:41,519 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 52 selfloop transitions, 6 changer transitions 23/83 dead transitions. [2024-06-21 21:30:41,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 83 transitions, 656 flow [2024-06-21 21:30:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2024-06-21 21:30:41,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3172043010752688 [2024-06-21 21:30:41,519 INFO L175 Difference]: Start difference. First operand has 129 places, 67 transitions, 456 flow. Second operand 12 states and 118 transitions. [2024-06-21 21:30:41,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 83 transitions, 656 flow [2024-06-21 21:30:41,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 83 transitions, 600 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 21:30:41,539 INFO L231 Difference]: Finished difference. Result has 120 places, 57 transitions, 352 flow [2024-06-21 21:30:41,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=120, PETRI_TRANSITIONS=57} [2024-06-21 21:30:41,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-21 21:30:41,540 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 57 transitions, 352 flow [2024-06-21 21:30:41,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:41,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:41,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:41,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 21:30:41,540 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:41,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 610927274, now seen corresponding path program 18 times [2024-06-21 21:30:41,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781139645] [2024-06-21 21:30:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:43,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:43,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781139645] [2024-06-21 21:30:43,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781139645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:43,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:43,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:43,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151660678] [2024-06-21 21:30:43,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:43,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:43,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:43,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 57 transitions, 352 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:43,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:43,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:43,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:43,904 INFO L124 PetriNetUnfolderBase]: 162/351 cut-off events. [2024-06-21 21:30:43,904 INFO L125 PetriNetUnfolderBase]: For 18182/18182 co-relation queries the response was YES. [2024-06-21 21:30:43,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 351 events. 162/351 cut-off events. For 18182/18182 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1453 event pairs, 51 based on Foata normal form. 6/356 useless extension candidates. Maximal degree in co-relation 1632. Up to 282 conditions per place. [2024-06-21 21:30:43,905 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 47 selfloop transitions, 7 changer transitions 17/73 dead transitions. [2024-06-21 21:30:43,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 73 transitions, 530 flow [2024-06-21 21:30:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2024-06-21 21:30:43,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2024-06-21 21:30:43,906 INFO L175 Difference]: Start difference. First operand has 120 places, 57 transitions, 352 flow. Second operand 12 states and 117 transitions. [2024-06-21 21:30:43,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 73 transitions, 530 flow [2024-06-21 21:30:43,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 73 transitions, 469 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-06-21 21:30:43,920 INFO L231 Difference]: Finished difference. Result has 104 places, 52 transitions, 289 flow [2024-06-21 21:30:43,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=289, PETRI_PLACES=104, PETRI_TRANSITIONS=52} [2024-06-21 21:30:43,920 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 21:30:43,920 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 52 transitions, 289 flow [2024-06-21 21:30:43,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:43,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:43,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:43,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 21:30:43,921 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:43,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1397886778, now seen corresponding path program 19 times [2024-06-21 21:30:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:43,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902135381] [2024-06-21 21:30:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:46,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902135381] [2024-06-21 21:30:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902135381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:46,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:46,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:46,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695221294] [2024-06-21 21:30:46,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:46,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:46,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:46,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:46,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:46,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 52 transitions, 289 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:46,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:46,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:46,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:47,417 INFO L124 PetriNetUnfolderBase]: 146/319 cut-off events. [2024-06-21 21:30:47,417 INFO L125 PetriNetUnfolderBase]: For 14598/14598 co-relation queries the response was YES. [2024-06-21 21:30:47,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 319 events. 146/319 cut-off events. For 14598/14598 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1276 event pairs, 49 based on Foata normal form. 6/324 useless extension candidates. Maximal degree in co-relation 1430. Up to 194 conditions per place. [2024-06-21 21:30:47,418 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 36 selfloop transitions, 18 changer transitions 11/67 dead transitions. [2024-06-21 21:30:47,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 67 transitions, 451 flow [2024-06-21 21:30:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2024-06-21 21:30:47,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2024-06-21 21:30:47,419 INFO L175 Difference]: Start difference. First operand has 104 places, 52 transitions, 289 flow. Second operand 12 states and 117 transitions. [2024-06-21 21:30:47,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 67 transitions, 451 flow [2024-06-21 21:30:47,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 67 transitions, 429 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:30:47,428 INFO L231 Difference]: Finished difference. Result has 97 places, 49 transitions, 291 flow [2024-06-21 21:30:47,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=291, PETRI_PLACES=97, PETRI_TRANSITIONS=49} [2024-06-21 21:30:47,428 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-21 21:30:47,428 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 49 transitions, 291 flow [2024-06-21 21:30:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:47,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:47,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:47,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 21:30:47,429 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:47,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2071318186, now seen corresponding path program 20 times [2024-06-21 21:30:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:47,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477924130] [2024-06-21 21:30:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:49,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:49,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477924130] [2024-06-21 21:30:49,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477924130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:49,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:49,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:49,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110109268] [2024-06-21 21:30:49,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:49,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:49,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:49,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:49,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:49,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:49,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 49 transitions, 291 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:49,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:49,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:49,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:50,430 INFO L124 PetriNetUnfolderBase]: 121/268 cut-off events. [2024-06-21 21:30:50,430 INFO L125 PetriNetUnfolderBase]: For 9190/9190 co-relation queries the response was YES. [2024-06-21 21:30:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1129 conditions, 268 events. 121/268 cut-off events. For 9190/9190 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 996 event pairs, 34 based on Foata normal form. 6/273 useless extension candidates. Maximal degree in co-relation 1084. Up to 204 conditions per place. [2024-06-21 21:30:50,431 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 42 selfloop transitions, 9 changer transitions 11/64 dead transitions. [2024-06-21 21:30:50,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 64 transitions, 447 flow [2024-06-21 21:30:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-06-21 21:30:50,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2024-06-21 21:30:50,431 INFO L175 Difference]: Start difference. First operand has 97 places, 49 transitions, 291 flow. Second operand 12 states and 116 transitions. [2024-06-21 21:30:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 64 transitions, 447 flow [2024-06-21 21:30:50,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 64 transitions, 405 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:30:50,439 INFO L231 Difference]: Finished difference. Result has 93 places, 46 transitions, 255 flow [2024-06-21 21:30:50,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=255, PETRI_PLACES=93, PETRI_TRANSITIONS=46} [2024-06-21 21:30:50,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-21 21:30:50,440 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 46 transitions, 255 flow [2024-06-21 21:30:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:50,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:50,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:50,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 21:30:50,440 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:50,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1398146248, now seen corresponding path program 21 times [2024-06-21 21:30:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267332619] [2024-06-21 21:30:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:50,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:53,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267332619] [2024-06-21 21:30:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267332619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:53,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:53,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:53,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931294044] [2024-06-21 21:30:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:53,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:53,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:53,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:53,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:53,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:53,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 46 transitions, 255 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:53,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:53,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:53,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:53,737 INFO L124 PetriNetUnfolderBase]: 111/250 cut-off events. [2024-06-21 21:30:53,737 INFO L125 PetriNetUnfolderBase]: For 8044/8044 co-relation queries the response was YES. [2024-06-21 21:30:53,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 250 events. 111/250 cut-off events. For 8044/8044 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 907 event pairs, 23 based on Foata normal form. 6/255 useless extension candidates. Maximal degree in co-relation 992. Up to 127 conditions per place. [2024-06-21 21:30:53,738 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 33 selfloop transitions, 16 changer transitions 10/61 dead transitions. [2024-06-21 21:30:53,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 61 transitions, 405 flow [2024-06-21 21:30:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2024-06-21 21:30:53,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31451612903225806 [2024-06-21 21:30:53,738 INFO L175 Difference]: Start difference. First operand has 93 places, 46 transitions, 255 flow. Second operand 12 states and 117 transitions. [2024-06-21 21:30:53,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 61 transitions, 405 flow [2024-06-21 21:30:53,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 61 transitions, 381 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:30:53,744 INFO L231 Difference]: Finished difference. Result has 88 places, 42 transitions, 247 flow [2024-06-21 21:30:53,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=88, PETRI_TRANSITIONS=42} [2024-06-21 21:30:53,744 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-21 21:30:53,744 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 42 transitions, 247 flow [2024-06-21 21:30:53,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:53,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:53,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:53,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 21:30:53,745 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:53,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1196797528, now seen corresponding path program 22 times [2024-06-21 21:30:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629157019] [2024-06-21 21:30:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:55,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629157019] [2024-06-21 21:30:55,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629157019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:55,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:55,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481886132] [2024-06-21 21:30:55,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:55,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:55,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:55,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:55,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 42 transitions, 247 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:55,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:55,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:55,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:30:55,845 INFO L124 PetriNetUnfolderBase]: 84/193 cut-off events. [2024-06-21 21:30:55,845 INFO L125 PetriNetUnfolderBase]: For 4704/4704 co-relation queries the response was YES. [2024-06-21 21:30:55,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 193 events. 84/193 cut-off events. For 4704/4704 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 623 event pairs, 19 based on Foata normal form. 6/198 useless extension candidates. Maximal degree in co-relation 680. Up to 90 conditions per place. [2024-06-21 21:30:55,846 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 27 selfloop transitions, 11 changer transitions 16/56 dead transitions. [2024-06-21 21:30:55,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 56 transitions, 385 flow [2024-06-21 21:30:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:30:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:30:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2024-06-21 21:30:55,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064516129032258 [2024-06-21 21:30:55,846 INFO L175 Difference]: Start difference. First operand has 88 places, 42 transitions, 247 flow. Second operand 12 states and 114 transitions. [2024-06-21 21:30:55,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 56 transitions, 385 flow [2024-06-21 21:30:55,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 56 transitions, 345 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 21:30:55,850 INFO L231 Difference]: Finished difference. Result has 82 places, 36 transitions, 204 flow [2024-06-21 21:30:55,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=36} [2024-06-21 21:30:55,850 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 21:30:55,851 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 36 transitions, 204 flow [2024-06-21 21:30:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:55,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:30:55,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:30:55,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 21:30:55,851 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:30:55,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:30:55,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1204901236, now seen corresponding path program 23 times [2024-06-21 21:30:55,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:30:55,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065280402] [2024-06-21 21:30:55,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:30:55,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:30:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:30:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:30:59,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:30:59,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065280402] [2024-06-21 21:30:59,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065280402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:30:59,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:30:59,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:30:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282196355] [2024-06-21 21:30:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:30:59,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:30:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:30:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:30:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:30:59,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:30:59,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 36 transitions, 204 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:30:59,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:30:59,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:30:59,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:00,025 INFO L124 PetriNetUnfolderBase]: 73/168 cut-off events. [2024-06-21 21:31:00,025 INFO L125 PetriNetUnfolderBase]: For 3746/3746 co-relation queries the response was YES. [2024-06-21 21:31:00,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 168 events. 73/168 cut-off events. For 3746/3746 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 503 event pairs, 17 based on Foata normal form. 6/173 useless extension candidates. Maximal degree in co-relation 580. Up to 89 conditions per place. [2024-06-21 21:31:00,026 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 26 selfloop transitions, 12 changer transitions 11/51 dead transitions. [2024-06-21 21:31:00,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 51 transitions, 334 flow [2024-06-21 21:31:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:31:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:31:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-06-21 21:31:00,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2024-06-21 21:31:00,027 INFO L175 Difference]: Start difference. First operand has 82 places, 36 transitions, 204 flow. Second operand 12 states and 116 transitions. [2024-06-21 21:31:00,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 51 transitions, 334 flow [2024-06-21 21:31:00,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 300 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 21:31:00,029 INFO L231 Difference]: Finished difference. Result has 71 places, 33 transitions, 183 flow [2024-06-21 21:31:00,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=183, PETRI_PLACES=71, PETRI_TRANSITIONS=33} [2024-06-21 21:31:00,029 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-06-21 21:31:00,029 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 33 transitions, 183 flow [2024-06-21 21:31:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:00,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:00,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:00,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 21:31:00,030 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:31:00,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1204641766, now seen corresponding path program 24 times [2024-06-21 21:31:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346753029] [2024-06-21 21:31:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:03,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:03,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346753029] [2024-06-21 21:31:03,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346753029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:03,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:03,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:31:03,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602421646] [2024-06-21 21:31:03,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:31:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:31:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:31:03,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:31:03,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 33 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:03,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:03,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:31:03,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:03,914 INFO L124 PetriNetUnfolderBase]: 63/150 cut-off events. [2024-06-21 21:31:03,914 INFO L125 PetriNetUnfolderBase]: For 2394/2394 co-relation queries the response was YES. [2024-06-21 21:31:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 150 events. 63/150 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 426 event pairs, 6 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 504. Up to 65 conditions per place. [2024-06-21 21:31:03,915 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 25 selfloop transitions, 11 changer transitions 10/48 dead transitions. [2024-06-21 21:31:03,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 48 transitions, 307 flow [2024-06-21 21:31:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:31:03,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:31:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-06-21 21:31:03,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2024-06-21 21:31:03,916 INFO L175 Difference]: Start difference. First operand has 71 places, 33 transitions, 183 flow. Second operand 12 states and 116 transitions. [2024-06-21 21:31:03,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 48 transitions, 307 flow [2024-06-21 21:31:03,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 48 transitions, 277 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:31:03,917 INFO L231 Difference]: Finished difference. Result has 67 places, 29 transitions, 159 flow [2024-06-21 21:31:03,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=159, PETRI_PLACES=67, PETRI_TRANSITIONS=29} [2024-06-21 21:31:03,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-21 21:31:03,918 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 29 transitions, 159 flow [2024-06-21 21:31:03,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:03,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:03,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:03,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 21:31:03,918 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:31:03,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1405990486, now seen corresponding path program 25 times [2024-06-21 21:31:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109700994] [2024-06-21 21:31:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:05,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:05,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109700994] [2024-06-21 21:31:05,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109700994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:05,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:05,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:31:05,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148277817] [2024-06-21 21:31:05,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:05,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:31:05,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:31:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:31:06,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:31:06,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 29 transitions, 159 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:06,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:06,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:31:06,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:06,350 INFO L124 PetriNetUnfolderBase]: 51/126 cut-off events. [2024-06-21 21:31:06,350 INFO L125 PetriNetUnfolderBase]: For 1936/1936 co-relation queries the response was YES. [2024-06-21 21:31:06,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 126 events. 51/126 cut-off events. For 1936/1936 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 318 event pairs, 15 based on Foata normal form. 6/131 useless extension candidates. Maximal degree in co-relation 428. Up to 61 conditions per place. [2024-06-21 21:31:06,350 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 18 selfloop transitions, 5 changer transitions 18/43 dead transitions. [2024-06-21 21:31:06,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 43 transitions, 271 flow [2024-06-21 21:31:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:31:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:31:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2024-06-21 21:31:06,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30376344086021506 [2024-06-21 21:31:06,352 INFO L175 Difference]: Start difference. First operand has 67 places, 29 transitions, 159 flow. Second operand 12 states and 113 transitions. [2024-06-21 21:31:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 43 transitions, 271 flow [2024-06-21 21:31:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 241 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 21:31:06,353 INFO L231 Difference]: Finished difference. Result has 61 places, 22 transitions, 110 flow [2024-06-21 21:31:06,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=110, PETRI_PLACES=61, PETRI_TRANSITIONS=22} [2024-06-21 21:31:06,354 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-21 21:31:06,354 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 22 transitions, 110 flow [2024-06-21 21:31:06,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:06,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:31:06,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:06,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 21:31:06,354 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:31:06,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:31:06,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2071577656, now seen corresponding path program 26 times [2024-06-21 21:31:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:31:06,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238331749] [2024-06-21 21:31:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:31:06,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:31:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:31:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:31:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:31:08,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238331749] [2024-06-21 21:31:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238331749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:31:08,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:31:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 21:31:08,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071673094] [2024-06-21 21:31:08,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:31:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 21:31:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:31:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 21:31:08,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 21:31:08,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:31:08,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 22 transitions, 110 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:08,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:31:08,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:31:08,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:31:08,865 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-21 21:31:08,865 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-06-21 21:31:08,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 65 events. 24/65 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 168. Up to 24 conditions per place. [2024-06-21 21:31:08,866 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2024-06-21 21:31:08,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 31 transitions, 156 flow [2024-06-21 21:31:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:31:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:31:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 102 transitions. [2024-06-21 21:31:08,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27419354838709675 [2024-06-21 21:31:08,866 INFO L175 Difference]: Start difference. First operand has 61 places, 22 transitions, 110 flow. Second operand 12 states and 102 transitions. [2024-06-21 21:31:08,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 31 transitions, 156 flow [2024-06-21 21:31:08,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 126 flow, removed 1 selfloop flow, removed 15 redundant places. [2024-06-21 21:31:08,867 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 21:31:08,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-21 21:31:08,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-06-21 21:31:08,867 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 21:31:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:31:08,869 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 21:31:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 21:31:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 21:31:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 21:31:08,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 21:31:08,870 INFO L445 BasicCegarLoop]: Path program histogram: [38, 34, 26, 18, 18, 17, 15, 10, 7, 6, 6, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:31:08,872 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 21:31:08,872 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 21:31:08,875 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 21:31:08,875 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 21:31:08,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 09:31:08 BasicIcfg [2024-06-21 21:31:08,876 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 21:31:08,876 INFO L158 Benchmark]: Toolchain (without parser) took 489451.39ms. Allocated memory was 178.3MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 149.6MB in the beginning and 859.5MB in the end (delta: -709.9MB). Peak memory consumption was 605.2MB. Max. memory is 16.1GB. [2024-06-21 21:31:08,876 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 142.6MB. Free memory was 93.2MB in the beginning and 93.1MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:31:08,877 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 110.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:31:08,877 INFO L158 Benchmark]: CACSL2BoogieTranslator took 581.66ms. Allocated memory is still 178.3MB. Free memory was 148.8MB in the beginning and 114.2MB in the end (delta: 34.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2024-06-21 21:31:08,877 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.66ms. Allocated memory is still 178.3MB. Free memory was 114.2MB in the beginning and 111.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 21:31:08,877 INFO L158 Benchmark]: Boogie Preprocessor took 51.19ms. Allocated memory is still 178.3MB. Free memory was 111.0MB in the beginning and 106.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 21:31:08,877 INFO L158 Benchmark]: RCFGBuilder took 556.81ms. Allocated memory is still 178.3MB. Free memory was 106.8MB in the beginning and 142.0MB in the end (delta: -35.2MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. [2024-06-21 21:31:08,877 INFO L158 Benchmark]: TraceAbstraction took 488194.52ms. Allocated memory was 178.3MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 140.9MB in the beginning and 859.5MB in the end (delta: -718.6MB). Peak memory consumption was 597.4MB. Max. memory is 16.1GB. [2024-06-21 21:31:08,878 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 142.6MB. Free memory was 93.2MB in the beginning and 93.1MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 110.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 581.66ms. Allocated memory is still 178.3MB. Free memory was 148.8MB in the beginning and 114.2MB in the end (delta: 34.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.66ms. Allocated memory is still 178.3MB. Free memory was 114.2MB in the beginning and 111.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.19ms. Allocated memory is still 178.3MB. Free memory was 111.0MB in the beginning and 106.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 556.81ms. Allocated memory is still 178.3MB. Free memory was 106.8MB in the beginning and 142.0MB in the end (delta: -35.2MB). Peak memory consumption was 62.9MB. Max. memory is 16.1GB. * TraceAbstraction took 488194.52ms. Allocated memory was 178.3MB in the beginning and 1.5GB in the end (delta: 1.3GB). Free memory was 140.9MB in the beginning and 859.5MB in the end (delta: -718.6MB). Peak memory consumption was 597.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 834]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 835]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 488.1s, OverallIterations: 229, TraceHistogramMax: 1, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.0s, AutomataDifference: 212.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15917 SdHoareTripleChecker+Valid, 69.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13588 mSDsluCounter, 9625 SdHoareTripleChecker+Invalid, 60.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8766 mSDsCounter, 3911 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 114113 IncrementalHoareTripleChecker+Invalid, 118024 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3911 mSolverCounterUnsat, 859 mSDtfsCounter, 114113 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2796 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 84.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3071occurred in iteration=99, InterpolantAutomatonStates: 2373, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 272.6s InterpolantComputationTime, 3810 NumberOfCodeBlocks, 3810 NumberOfCodeBlocksAsserted, 229 NumberOfCheckSat, 3581 ConstructedInterpolants, 0 QuantifiedInterpolants, 181912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 229 InterpolantComputations, 229 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 21:31:08,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE